Urban waste water treatment per province and river basin district

Changed on: 22/03/2023 02:00

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Urban waste water treatment per province and river basin district
Periods	Regions	Urban waste water treatment plants Numbers by type Total number (number)	Urban waste water treatment plants Numbers by type Trickling filters (number)	Urban waste water treatment plants Numbers by type Aeration tanks (number)	Urban waste water treatment plants Numbers by type Oxidation tanks (number)	Urban waste water treatment plants Numbers by type Oxidation ditches (number)	Urban waste water treatment plants Numbers by type Carrousels (number)	Urban waste water treatment plants Numbers by type Discontinuous systems (number)	Urban waste water treatment plants Numbers by type Parallel installations (number)	Urban waste water treatment plants Numbers by type Multi-stage installations (number)	Urban waste water treatment plants Numbers by type Compact installations (number)	Urban waste water treatment plants Numbers by type Nereda granular sludge reactor (number)	Urban waste water treatment plants Numbers by type Hybrid Nereda - active sludge system (number)	Urban waste water treatment plants Capacity pollution equivalents by type Total capacity pollution equivalents (1 000 pollution equivalent)	Urban waste water treatment plants Capacity pollution equivalents by type Trickling filters (1 000 pollution equivalent)	Urban waste water treatment plants Capacity pollution equivalents by type Aeration tanks (1 000 pollution equivalent)	Urban waste water treatment plants Capacity pollution equivalents by type Oxidation tanks (1 000 pollution equivalent)	Urban waste water treatment plants Capacity pollution equivalents by type Oxidation ditches (1 000 pollution equivalent)	Urban waste water treatment plants Capacity pollution equivalents by type Carrousels (1 000 pollution equivalent)	Urban waste water treatment plants Capacity pollution equivalents by type Discontinuous systems (1 000 pollution equivalent)	Urban waste water treatment plants Capacity pollution equivalents by type Parallel installations (1 000 pollution equivalent)	Urban waste water treatment plants Capacity pollution equivalents by type Multi-stage installations (1 000 pollution equivalent)	Urban waste water treatment plants Capacity pollution equivalents by type Compact installations (1 000 pollution equivalent)	Urban waste water treatment plants Capacity pollution equivalents by type Nereda granular sludge reactor (1 000 pollution equivalent)	Urban waste water treatment plants Capacity pollution equivalents by type Hybrid Nereda - active sludge system (1 000 pollution equivalent)	Influent waste water Quantities Volume waste water (1 000 m3)	Influent waste water Quantities Pollution Equivalents (1 000 pollution equivalent)	Influent waste water Quantities Chemical oxygen demand (COD) (1 000 kg)	Influent waste water Quantities Biochemical oxygen demand (BOD) (1 000 kg)	Influent waste water Quantities Nitrogen compounds as N (total) (1 000 kg)	Influent waste water Quantities Phosphorus compounds as P (total) (1 000 kg)	Influent waste water Quantities Copper (kg)	Influent waste water Quantities Chromium (kg)	Influent waste water Quantities Zinc (kg)	Influent waste water Quantities Lead (kg)	Influent waste water Quantities Cadmium (kg)	Influent waste water Quantities Nickel (kg)	Influent waste water Quantities Mercury (kg)	Influent waste water Quantities Arsenic (kg)	Discharge of waste water (effluent) Quantities Volume waste water (1 000 m3)	Discharge of waste water (effluent) Quantities Pollution Equivalents (1 000 pollution equivalent)	Discharge of waste water (effluent) Quantities Chemical oxygen demand (COD) (1 000 kg)	Discharge of waste water (effluent) Quantities Biochemical oxygen demand (BOD) (1 000 kg)	Discharge of waste water (effluent) Quantities Nitrogen compounds as N (total) (1 000 kg)	Discharge of waste water (effluent) Quantities Phosphorus compounds as P (total) (1 000 kg)	Discharge of waste water (effluent) Quantities Copper (kg)	Discharge of waste water (effluent) Quantities Chromium (kg)	Discharge of waste water (effluent) Quantities Zinc (kg)	Discharge of waste water (effluent) Quantities Lead (kg)	Discharge of waste water (effluent) Quantities Cadmium (kg)	Discharge of waste water (effluent) Quantities Nickel (kg)	Discharge of waste water (effluent) Quantities Mercury (kg)	Discharge of waste water (effluent) Quantities Arsenic (kg)	Sewage sludge Wet sewage sludge by destination Total wet sludge (1 000 kg)	Sewage sludge Wet sewage sludge by destination Agriculture (1 000 kg)	Sewage sludge Wet sewage sludge by destination Wet oxidation (1 000 kg)	Sewage sludge Wet sewage sludge by destination Composting (1 000 kg)	Sewage sludge Wet sewage sludge by destination Landfill (1 000 kg)	Sewage sludge Wet sewage sludge by destination Incineration (1 000 kg)	Sewage sludge Wet sewage sludge by destination Cement industry (1 000 kg)	Sewage sludge Wet sewage sludge by destination Co-incineration at power plants (1 000 kg)	Sewage sludge Wet sewage sludge by destination Other destinations (1 000 kg)	Sewage sludge Dry solids by destination Total dry solids (1 000 kg)	Sewage sludge Dry solids by destination Agriculture (1 000 kg)	Sewage sludge Dry solids by destination Wet oxidation (1 000 kg)	Sewage sludge Dry solids by destination Composting (1 000 kg)	Sewage sludge Dry solids by destination Landfill (1 000 kg)	Sewage sludge Dry solids by destination Incineration (1 000 kg)	Sewage sludge Dry solids by destination Cement industry (1 000 kg)	Sewage sludge Dry solids by destination Co-incineration at power plants (1 000 kg)	Sewage sludge Dry solids by destination Other destinations (1 000 kg)	Sewage sludge Nutrients and heavy metals Ashes (1 000 kg)	Sewage sludge Nutrients and heavy metals Nitrogen compounds as N (1 000 kg)	Sewage sludge Nutrients and heavy metals Phosphorus compounds as P (1 000 kg)	Sewage sludge Nutrients and heavy metals Copper (kg)	Sewage sludge Nutrients and heavy metals Chromium (kg)	Sewage sludge Nutrients and heavy metals Zinc (kg)	Sewage sludge Nutrients and heavy metals Lead (kg)	Sewage sludge Nutrients and heavy metals Cadmium (kg)	Sewage sludge Nutrients and heavy metals Nickel (kg)	Sewage sludge Nutrients and heavy metals Mercury (kg)	Sewage sludge Nutrients and heavy metals Arsenic (kg)
1990	Nederland	469	48	65	57	119	97	22	9	34	4			.	.	.	.	.	.	.	.	.	.			1,642,646	.	932,832	348,630	81,273	14,357	177,145	38,733	497,455	96,356	2,049	32,675	1,049	4,943	1,642,646	.	131,495	23,645	39,292	6,239	36,492	13,130	140,282	25,149	820	19,474	315	2,471	4,859,804	1,621,964	0	446,575	2,704,575	78,152	0	0	8,538	315,266	81,602	0	63,280	158,107	11,654	0	0	623	127,156	15,900	7,066	140,084	25,553	351,411	70,674	1,213	13,030	691	2,409
2000	Nederland	391	11	52	67	84	125	8	13	31	0			.	.	.	.	.	.	.	.	.	.			1,996,779	.	920,719	353,527	84,726	13,300	156,891	22,707	438,782	59,425	1,030	25,394	511	5,801	1,996,779	.	91,033	11,284	28,952	2,845	17,846	5,035	100,897	8,555	471	12,037	143	2,787	1,426,447	0	287,900	161,739	155,255	778,051	0	0	43,501	336,361	0	14,355	39,452	64,147	180,493	0	0	37,913	128,336	15,962	7,258	130,891	17,322	319,070	51,466	544	11,036	404	3,017
2010	Nederland	349	6	61	61	63	115	2	18	21	1			30,365	308	10,577	3,867	1,348	9,307	49	1,925	2,865	91			1,934,310	24,745	953,490	370,007	87,866	13,880	145,405	17,391	460,409	36,893	803	20,905	319	6,295	1,934,310	2,036	75,461	8,012	16,586	2,226	8,842	2,897	85,375	3,901	232	9,367	87	2,848	1,321,586	0	0	0	0	874,505	155,551	265,488	26,042	332,601	0	0	0	0	199,674	64,758	65,717	2,452	110,086	18,736	11,101	132,552	13,715	348,041	39,757	468	11,020	265	3,276
2020	Nederland	315	2	58	56	44	118	1	10	14	1	9	2	29,713	108	10,152	4,615	1,133	9,884	40	956	1,598	91	774	363	1,938,476	27,031	1,056,480	428,585	93,686	13,297	133,000	14,130	433,742	28,269	435	17,391	194	6,449	1,938,476	1,986	72,302	7,512	14,320	1,644	9,156	1,862	68,981	1,244	82	7,143	26	2,603	1,263,335	0	0	0	5,613	1,063,157	14,514	126,468	53,582	308,360	0	0	0	1,480	250,382	13,614	30,765	12,119	91,789	19,111	11,170	120,715	12,003	325,845	25,755	311	7,939	143	3,247
2021	Nederland	313	1	57	56	42	119	2	10	14	1	9	2	29,957	54	10,225	4,585	1,111	10,058	91	956	1,598	91	827	363	1,963,884	26,781	1,039,561	438,139	93,852	13,120	.	.	.	.	.	.	.	.	1,963,884	1,998	72,524	8,217	14,379	1,681	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.
1990	The river Eems	29	3	2	4	8	5	2	0	4	0			.	.	.	.	.	.	.	.	.	.			72,404	.	33,942	11,045	3,247	517	7,805	678	16,523	3,352	53	670	51	409	72,404	.	4,724	583	1,553	187	1,608	230	4,660	875	21	399	15	205	147,935	132,393	0	0	14,642	0	0	0	900	10,391	5,745	0	0	4,604	0	0	0	42	4,176	511	455	5,270	423	11,533	2,421	30	264	35	206
2000	The river Eems	21	1	2	4	4	7	0	0	3	0			.	.	.	.	.	.	.	.	.	.			68,452	.	30,038	11,495	3,098	410	4,500	405	11,842	1,361	20	501	12	128	68,452	.	4,376	637	1,160	91	360	86	2,546	150	8	227	3	64	41,385	0	0	0	39,695	0	0	0	1,690	11,234	0	0	0	11,179	0	0	0	54	4,251	568	290	5,140	373	10,772	1,412	14	304	9	75
2010	The river Eems	16	0	7	3	0	4	0	0	2	0			1,140	0	370	102	0	272	0	0	396	0			79,026	890	33,371	13,263	3,370	461	5,604	667	13,988	1,745	17	888	13	312	79,026	103	3,663	458	733	58	346	121	2,009	158	6	253	4	180	53,013	0	0	0	0	0	53,013	0	0	12,490	0	0	0	0	0	12,490	0	0	5,038	828	535	5,454	353	12,032	1,233	14	284	11	150
2020	The river Eems	16	0	7	3	0	4	0	0	1	0	0	1	1,134	0	366	102	0	270	0	0	56	0	0	340	78,835	959	38,332	14,910	3,129	440	6,775	482	15,832	914	11	429	12	188	78,835	121	4,683	475	713	62	461	58	1,557	35	2	164	3	64	48,346	0	0	0	0	48,346	0	0	0	11,574	0	0	0	0	11,574	0	0	0	4,583	927	416	5,347	405	12,500	1,030	9	338	5	208
2021	The river Eems	16	0	7	3	0	4	0	0	1	0	0	1	1,134	0	366	102	0	270	0	0	56	0	0	340	79,430	986	40,317	14,551	3,003	463	.	.	.	.	.	.	.	.	79,430	105	4,039	556	643	58	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.
1990	The river Rijn (North Rijn)	43	4	2	6	7	20	1	2	1	0			.	.	.	.	.	.	.	.	.	.			82,303	.	48,584	17,686	3,729	647	7,316	1,828	21,433	3,977	47	1,309	39	300	82,303	.	6,735	763	1,676	260	1,507	620	6,044	1,038	19	780	12	150	196,319	136,330	0	26,060	33,284	0	0	0	645	18,563	6,070	0	1,199	11,267	0	0	0	28	8,422	828	373	5,260	1,179	14,539	2,762	26	514	26	136
2000	The river Rijn (North Rijn)	43	2	1	6	6	24	0	2	2	0			.	.	.	.	.	.	.	.	.	.			102,689	.	42,947	15,380	3,981	689	6,061	830	18,151	2,422	27	798	17	330	102,689	.	5,631	564	1,024	150	485	176	3,902	266	11	362	5	165	57,969	0	0	0	57,602	0	0	0	367	14,608	0	0	0	14,596	0	0	0	11	5,843	446	297	4,824	628	11,760	1,870	15	394	10	117
2010	The river Rijn (North Rijn)	41	2	0	5	4	25	1	1	2	1			1,595	63	0	124	44	1,059	40	17	158	91			101,291	1,131	43,275	17,326	4,081	652	6,177	903	21,156	1,842	29	737	13	344	101,291	113	4,395	342	655	96	381	175	4,269	188	11	294	4	164	62,980	0	0	0	0	0	62,980	0	0	15,833	0	0	0	0	0	15,833	0	0	5,700	922	437	5,114	686	15,163	1,498	17	416	8	159
2020	The river Rijn (North Rijn)	38	1	0	5	4	24	1	1	1	1	0	0	1,521	54	0	178	45	1,054	40	17	41	91	0	0	105,753	1,243	47,463	19,412	4,543	639	5,599	888	18,260	1,356	19	580	10	322	105,753	100	4,013	313	494	81	377	83	3,007	64	7	199	3	158	71,852	0	0	0	0	71,852	0	0	0	15,285	0	0	0	0	15,285	0	0	0	4,404	1,045	577	4,308	577	11,718	1,117	10	347	5	99
2021	The river Rijn (North Rijn)	38	1	0	5	4	24	1	1	1	1	0	0	1,521	54	0	178	45	1,054	40	17	41	91	0	0	109,065	1,285	48,929	20,408	4,694	668	.	.	.	.	.	.	.	.	109,065	110	4,323	367	562	75	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.
1990	The river Rijn (East Rijn)	79	4	15	7	24	15	0	4	8	0			.	.	.	.	.	.	.	.	.	.			247,822	.	157,839	59,158	13,470	2,421	26,627	6,256	69,906	12,528	195	4,574	138	481	247,822	.	20,162	3,204	5,934	1,100	5,485	2,121	19,713	3,270	78	2,726	41	240	544,601	443,788	0	27,856	72,710	0	0	0	247	46,730	20,918	0	5,029	20,772	0	0	0	11	18,344	2,469	1,104	22,762	4,191	51,928	9,568	121	1,892	99	270
2000	The river Rijn (East Rijn)	67	1	12	9	18	15	0	4	8	0			.	.	.	.	.	.	.	.	.	.			282,040	.	149,902	55,634	13,657	2,160	22,861	4,822	78,678	9,149	98	3,363	62	567	282,040	.	12,532	1,160	3,879	527	2,050	850	18,031	931	33	1,560	15	293	327,287	0	148,553	97,189	17,856	63,650	0	0	39	49,008	0	5,923	24,132	4,625	14,328	0	0	1	19,035	2,168	1,214	23,965	4,067	52,658	8,485	80	1,675	69	238
2010	The river Rijn (East Rijn)	60	0	13	11	13	11	0	5	6	0			4,680	0	1,297	1,135	253	1,069	0	586	310	0			258,577	3,816	150,058	55,253	12,877	2,075	18,688	1,917	81,153	4,420	47	2,755	26	458	258,577	316	11,495	1,031	2,336	422	1,262	319	15,525	466	17	1,142	5	201	232,671	0	0	0	0	46,441	0	169,778	16,452	51,657	0	0	0	0	10,495	0	40,369	793	17,628	2,744	1,812	15,387	2,475	46,219	3,416	54	2,772	33	429
2020	The river Rijn (East Rijn)	73	0	13	14	13	23	0	2	5	0	2	1	6,849	0	1,509	1,742	314	2,814	0	190	186	0	72	23	365,571	6,114	239,818	97,276	21,032	2,974	26,145	2,790	104,541	6,002	90	3,171	39	1,214	365,571	381	13,503	1,079	2,773	299	1,849	332	16,472	242	9	1,167	2	429	281,660	0	0	0	5,613	162,661	0	84,808	28,579	62,425	0	0	0	1,480	33,037	0	21,077	6,830	19,007	3,867	2,211	23,488	2,468	73,538	4,661	62	1,704	30	563
2021	The river Rijn (East Rijn)	73	0	13	14	13	23	0	2	5	0	2	1	6,819	0	1,515	1,707	314	2,814	0	190	186	0	70	23	372,917	6,200	241,154	99,079	21,609	2,993	.	.	.	.	.	.	.	.	372,917	397	14,128	1,064	2,806	316	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.
1990	The river Rijn (Central Rijn)	30	7	4	2	10	5	0	0	2	0			.	.	.	.	.	.	.	.	.	.			93,356	.	55,889	19,746	4,949	892	7,943	1,962	27,365	4,436	66	1,649	60	557	93,356	.	6,302	978	2,279	304	1,636	665	7,717	1,158	26	983	18	278	233,155	192,022	0	16,619	24,514	0	0	0	0	19,590	10,735	0	2,252	6,604	0	0	0	0	8,237	970	489	5,219	1,119	15,098	2,607	31	564	34	235
2000	The river Rijn (Central Rijn)	19	0	2	3	1	10	0	1	2	0			.	.	.	.	.	.	.	.	.	.			113,100	.	56,208	21,629	5,234	812	8,406	2,352	29,551	4,728	135	1,178	32	315	113,100	.	4,310	412	1,091	104	995	678	5,175	751	59	552	11	129	182,340	0	123,877	4,095	0	54,368	0	0	0	20,801	0	7,504	1,235	0	12,063	0	0	0	7,853	1,055	508	5,999	793	18,843	2,712	35	375	26	231
2010	The river Rijn (Central Rijn)	18	0	3	1	1	11	0	1	1	0			2,141	0	360	48	20	1,538	0	161	15	0			116,264	1,946	75,812	27,330	6,724	1,054	6,480	720	24,355	1,691	35	1,083	18	486	116,264	115	4,114	338	1,017	85	370	119	5,765	202	12	460	4	184	86,247	0	0	0	0	60,294	0	25,953	0	19,645	0	0	0	0	13,016	0	6,629	0	6,320	1,081	691	6,082	664	22,090	1,786	19	511	17	178
2020	The river Rijn (Central Rijn)
2021	The river Rijn (Central Rijn)
1990	The river Rijn (West Rijn)	177	25	23	21	34	34	15	3	9	3			.	.	.	.	.	.	.	.	.	.			703,916	.	372,688	138,122	34,842	5,734	71,787	10,334	211,511	44,910	1,245	9,632	522	1,962	703,916	.	63,512	13,709	18,418	2,807	14,788	3,503	59,646	11,722	498	5,741	157	981	2,936,042	360,768	0	212,321	2,299,675	57,317	0	0	5,961	108,859	21,904	0	34,870	43,691	7,883	0	0	511	42,286	6,048	2,474	56,514	6,365	149,040	33,004	731	3,696	323	967
2000	The river Rijn (West Rijn)	150	6	19	27	30	48	5	5	10	0			.	.	.	.	.	.	.	.	.	.			877,465	.	394,421	152,746	37,227	5,677	60,531	6,732	177,574	27,255	371	9,635	226	2,791	877,465	.	38,840	5,432	14,131	1,170	5,407	1,402	41,610	3,613	148	4,320	62	1,295	461,943	0	15,470	60,455	35,525	327,708	0	0	22,785	142,471	0	928	14,085	32,379	74,315	0	0	20,763	53,166	7,000	2,851	53,939	4,869	139,031	24,579	244	3,818	198	1,541
2010	The river Rijn (West Rijn)	136	4	16	27	24	48	0	11	6	0			13,275	245	4,841	1,644	244	3,736	0	1,161	1,403	0			847,482	10,387	391,678	156,219	38,729	5,878	62,468	6,629	186,164	17,234	366	7,158	163	3,291	847,482	812	29,803	3,365	7,221	924	3,295	1,036	28,570	1,716	129	3,347	48	1,358	546,101	0	0	0	0	463,822	18,406	54,283	9,590	137,603	0	0	0	0	103,844	17,075	15,025	1,659	44,072	7,970	4,600	60,494	4,922	153,894	18,968	162	3,684	126	1,704
2020	The river Rijn (West Rijn)	116	1	17	24	11	49	0	6	6	0	2	0	12,860	54	4,602	1,963	153	4,016	0	662	952	0	459	0	868,245	11,879	462,761	189,110	41,499	5,684	57,983	5,674	169,235	13,717	160	6,423	88	3,110	868,245	826	29,325	2,995	6,282	733	3,549	733	23,990	567	42	2,782	14	1,289	573,616	0	0	0	0	506,953	0	41,660	25,003	140,822	0	0	0	0	125,846	0	9,688	5,288	37,845	8,770	4,977	54,156	4,670	139,057	12,467	119	3,008	67	1,720
2021	The river Rijn (West Rijn)	114	0	16	24	9	50	1	6	6	0	2	0	13,096	0	4,641	1,968	130	4,190	51	662	952	0	502	0	863,197	11,614	447,779	195,755	41,278	5,613	.	.	.	.	.	.	.	.	863,197	839	29,747	3,529	6,391	776	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.
1990	The river Maas	80	3	15	5	28	16	3	0	10	0			.	.	.	.	.	.	.	.	.	.			372,227	.	222,165	88,592	17,291	3,493	48,340	16,491	131,745	23,796	395	13,867	211	958	372,227	.	25,267	3,833	7,557	1,298	9,958	5,591	37,152	6,211	158	8,264	63	479	680,381	279,923	0	163,719	215,119	20,835	0	0	785	98,486	12,608	0	19,930	62,146	3,771	0	0	31	40,618	4,414	1,906	39,387	11,470	96,561	17,987	244	5,737	153	494
2000	The river Maas	65	0	14	7	19	18	1	0	6	0			.	.	.	.	.	.	.	.	.	.			458,597	.	210,180	83,164	17,911	2,951	47,094	6,285	106,096	11,968	324	8,949	150	1,151	458,597	.	20,552	2,588	5,905	664	7,835	1,534	25,224	2,462	188	4,588	43	588	293,043	0	0	0	254	274,319	0	0	18,471	82,621	0	0	0	189	65,352	0	0	17,079	30,230	4,153	1,647	31,124	5,968	73,118	10,537	135	4,016	81	598
2010	The river Maas	57	0	14	7	18	14	0	0	4	0			6,217	0	2,686	599	759	1,590	0	0	583	0			433,734	5,533	219,415	85,217	18,313	3,161	39,895	5,587	115,042	7,206	278	6,965	72	885	433,734	450	17,022	1,936	3,730	507	2,761	920	25,624	708	40	3,240	18	420	273,733	0	0	0	0	237,106	21,152	15,474	0	80,614	0	0	0	0	57,560	19,361	3,694	0	25,128	4,511	2,583	34,083	4,016	84,340	10,569	183	2,998	59	390
2020	The river Maas	52	0	14	3	14	16	0	0	1	0	4	0	6,046	0	2,756	427	606	1,686	0	0	363	0	207	0	430,317	5,699	224,044	89,885	19,474	2,976	31,454	3,643	108,624	5,360	129	5,885	37	1,121	430,317	443	16,415	2,151	3,244	342	2,580	563	21,335	302	18	2,500	2	438	232,913	0	0	0	0	218,399	14,514	0	0	66,010	0	0	0	0	52,396	13,614	0	0	21,230	3,862	2,550	27,499	3,132	75,411	5,324	94	2,211	29	423
2021	The river Maas	52	0	14	3	14	16	0	0	1	0	4	0	6,085	0	2,784	427	606	1,686	0	0	363	0	218	0	444,740	5,620	220,395	91,968	19,365	2,842	.	.	.	.	.	.	.	.	444,740	430	15,910	2,174	3,170	315	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.
1990	The river Schelde	31	2	4	12	8	2	1	0	0	1			.	.	.	.	.	.	.	.	.	.			70,618	.	41,725	14,281	3,744	652	7,328	1,184	18,973	3,357	49	975	27	276	70,618	.	4,793	576	1,875	283	1,510	401	5,350	876	20	581	8	138	121,371	76,740	0	0	44,631	0	0	0	0	12,646	3,622	0	0	9,024	0	0	0	0	5,074	661	266	5,672	806	12,711	2,327	29	363	21	101
2000	The river Schelde	26	1	2	11	6	3	2	1	0	0			.	.	.	.	.	.	.	.	.	.			94,436	.	37,022	13,480	3,619	602	7,438	1,281	16,891	2,543	55	971	14	519	94,436	.	4,791	490	1,762	138	714	309	4,409	381	25	427	5	253	62,479	0	0	0	4,323	58,006	0	0	150	15,619	0	0	0	1,178	14,436	0	0	5	7,958	573	451	5,900	623	12,888	1,871	22	454	12	218
2010	The river Schelde	21	0	8	7	3	2	1	0	0	0			1,318	0	1,023	215	27	43	10	0	0	0			97,936	1,043	39,882	15,400	3,774	599	6,092	968	18,551	2,756	31	1,318	13	519	97,936	128	4,968	540	894	134	425	206	3,611	462	17	632	4	341	66,842	0	0	0	0	66,842	0	0	0	14,759	0	0	0	0	14,759	0	0	0	6,200	681	444	5,938	600	14,303	2,288	20	356	10	266
2020	The river Schelde	20	0	7	7	2	2	0	1	0	0	1	0	1,302	0	919	202	16	43	0	86	0	0	36	0	89,756	1,136	44,064	17,991	4,009	583	5,044	654	17,250	921	26	904	9	493	89,756	115	4,363	499	814	127	340	93	2,620	34	5	332	1	225	54,946	0	0	0	0	54,946	0	0	0	12,243	0	0	0	0	12,243	0	0	0	4,720	640	439	5,918	750	13,621	1,156	16	332	6	234
2021	The river Schelde	20	0	7	7	2	2	0	1	0	0	1	0	1,302	0	919	202	16	43	0	86	0	0	36	0	94,534	1,074	40,986	16,377	3,902	540	.	.	.	.	.	.	.	.	94,534	117	4,377	528	807	141	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.
Source: CBS.

Explanation of symbols

Dataset is not available.

This table presents the most significant results of the annual survey Public treatment of urban waste water. The results are presented per province and river basin district (Rijn, Maas, Eems and Schelde) and include:
- number and capacity of the urban waste water treatment plants by type of treatment;
- the volume and concentration of organic matter, nutrients and heavy metals in the waste water running into waste water treatment plants (influent) and the volume of treated waste water (effluent). As of 2017, data on heavy metals are only inventoried for even years.
- the volume and destination of the sludge released, with nutrients and heavy metals. As of 2017, sludge data are only inventoried for even years.
Additional data on urban waste water treatment plants, process technology, energy consumption, generation of energy and sludge dewatering can be accessed on the Dutch version of StatLine.

Data available from: 1981

Status of the figures:
The figures in this table are definitive.

Changes as of 22 March 2023:
The figures of 2021 has been added.

When will new figures be published?
New figures on 2022 will be published by March 2024.

Description topics

Urban waste water treatment plants

The number and capacity of urban waste water treatment plants in the Netherlands where nearly all domestic waste water and waste water from the private sector is treated. The plants are all operated by regional water quality control authorities.

Numbers by type

Number of sewage water treatment plants broken down by method of treatment.

Total number: The total number of urban waste water treatment plants in the Netherlands.

Trickling filters: Waste water is sprinkled over a layer of porous stones covered with bacteria (biofilm). Thus, organic compounds in the waste water are degraded.

Aeration tanks: Pre-settled waste water runs through an intensively aerated basin containing active sludge (bacteria). Organic pollutants are degraded by oxygen and active sludge. The treatment process takes up only a short period of time and the sludge load is high which is typical of aeration basins.

Oxidation tanks: Operates by the same principle as the aeration tank but the sludge load is significantly lower. The resulting sludge is highly mineralised and will therefore decompose more slowly.

Oxidation ditches: In oxidation ditches, waste water is directed through a aeration circuit several times. The process takes up 2 or 3 days. Consequently, the sludge load is extremely low.

Carrousels: This technology is chiefly applied in large installations. Typical of carrousels are the depth (between 2 to 4 metres) and the aeration method.

Discontinuous systems: Oxidation basins and oxidation ditches. Waste water is let in batch-controlled.

Parallel installations: Various combinations of treatment systems (so-called 'streets') are applied in one installation.

Multi-stage installations: A serial process consisting of two systems, for instance, a trickling filter and an aeration basin. The waste water runs through both stages.

Compact installations: A system consisting of a basin subdivided into four segments. Waste water flows into the aeration segment. Subsequently, the sludge is separated in the central aeration zone. Then part of the sludge is conditioned in the reaeration zone and led back into the aeration zone. The other part (surplus sludge) is stabilised in the sludge mineralisation zone and subsequently removed.

Nereda granular sludge reactor: In the Nereda granular sludge reactor the wastewater is purified by micro-organism clogged in natural granular structures of high density. These granules have a high biological activity and make it easy to separate the micro-organisms from the treated wastewater.

As from 2019 this new treatment type is distinghuished separately in Statline. In the period 2011-2018 already 4 Nereda systems became operational. Until 2019, these installations were classified as oxidation tanks and/or discontinous systems.

Hybrid Nereda - active sludge system: System consisting of a parallel operated Nereda granular sludge reactor and activated sludge system.

In the Nereda granular sludge reactor the wastewater is purified by micro-organism clogged in natural granular structures of high density. These granules have a high biological activity and make it easy to separate the sludge from the treated wastewater.

In activated sludge systems the wastewater is treated in bassins with flocculated sludge . This sludge clumps exists of microorganisms that feed on the the organic pollution in wastewater.

As from 2019 this new treatment type is distinghuished separately in Statline. In the period 2013-2018 already 2 hybrid Nereda - activated sludge sytems became operational. Until 2019, these installations were classified as parallel installations.

Capacity pollution equivalents by type

Capacity urban waste water treatment plant:
A value that indicates how much organic pollution theoretically can be treated by a waste water treatment plant.

The pollution equivalent is the official unit that quantifies the pollution in waste water; one pollution equivalent = 150 g TOD (Total Oxygen Demand).
One pollution equivalent is the daily quantity of oxygen-demanding material in the waste water of one person. The degree of pollution in the waste water produced by the private sector is also expressed in pollution equivalents.
This unit is used as of 2010, so for previous years no values are available.

Total capacity pollution equivalents

Trickling filters: Waste water is sprinkled over a layer of porous stones covered with bacteria (biofilm). Thus, organic compounds in the waste water are degraded.

Aeration tanks: Pre-settled waste water runs through an intensively aerated basin containing active sludge (bacteria). Organic pollutants are degraded by oxygen and active sludge. The treatment process takes up only a short period of time and the sludge load is high which is typical of aeration basins.

Oxidation tanks: Operates by the same principle as the aeration tank but the sludge load is significantly lower. The resulting sludge is highly mineralised and will therefore decompose more slowly.

Oxidation ditches: In oxidation ditches, waste water is directed through a aeration circuit several times. The process takes up 2 or 3 days. Consequently, the sludge load is extremely low.

Carrousels: This technology is chiefly applied in large installations. Typical of carrousels are the depth (between 2 to 4 metres) and the aeration method.

Discontinuous systems: Oxidation basins and oxidation ditches. Waste water is let in batch-controlled.

Parallel installations: Various combinations of treatment systems (so-called 'streets') are applied in one installation.

Multi-stage installations: A serial process consisting of two systems, for instance, a trickling filter and an aeration basin. The waste water runs through both stages.

Compact installations: A system consisting of a basin subdivided into four segments. Waste water flows into the aeration segment. Subsequently, the sludge is separated in the central aeration zone. Then part of the sludge is conditioned in the reaeration zone and led back into the aeration zone. The other part (surplus sludge) is stabilised in the sludge mineralisation zone and subsequently removed.

Nereda granular sludge reactor: In the Nereda granular sludge reactor the wastewater is purified by micro-organism clogged in natural granular structures of high density. These granules have a high biological activity and make it easy to separate the micro-organisms from the treated wastewater.

As from 2019 this new treatment type is distinghuished separately in Statline. In the period 2011-2018 already 4 Nereda systems became operational. Until 2019, these installations were classified as oxidation tanks and/or discontinous systems.

Hybrid Nereda - active sludge system: System consisting of a parallel operated Nereda granular sludge reactor and activated sludge system.

In the Nereda granular sludge reactor the wastewater is purified by micro-organism clogged in natural granular structures of high density. These granules have a high biological activity and make it easy to separate the sludge from the treated wastewater.

In activated sludge systems the wastewater is treated in bassins with flocculated sludge . This sludge clumps exists of microorganisms that feed on the the organic pollution in wastewater.

As from 2019 this new treatment type is distinghuished separately in Statline. In the period 2013-2018 already 2 hybrid Nereda - activated sludge sytems became operational. Until 2019, these installations were classified as parallel installations.

Influent waste water

Data on concentrations and quantities of pollutants in the waste water running into urban waste water treatment plants (influent).

Quantities

Volume waste water: The annual volume of influent waste water.

Pollution Equivalents: The pollution equivalent is the official unit that quantifies the pollution in waste water; one pollution equivalent = 150 g TOD (Total Oxygen Demand).
One pollution equivalent is the daily quantity of oxygen-demanding material in the waste water of one person. The degree of pollution in the waste water produced by the private sector is also expressed in pollution equivalents.
This unit is used as of 2010, so for previous years no values are available.

Chemical oxygen demand (COD): Chemical oxygen demand (COD). Measure of the amount of oxygen consumed when a substance is degraded chemically.

Biochemical oxygen demand (BOD): Biological oxygen demand (BOD). Measure of the amount of oxygen consumed when a substance is biodegraded.

Nitrogen compounds as N (total): The total amount of nitrogen in organic compounds (e.g. proteins) and inorganic compounds (e.g. nitrate and ammonium)

Phosphorus compounds as P (total): The total amount of phosphates and other phosphorus compounds in waste water, measured as phosphorus (P).

Copper

Chromium

Zinc

Lead

Cadmium

Nickel

Mercury

Arsenic

Discharge of waste water (effluent)

Data on concentrations and quantities of pollutants in treated waste water (effluent) discharged from urban waste water treatment plants.

Quantities

Volume waste water: The annual volume of effluent waste water.

Pollution Equivalents: The pollution equivalent is the official unit that quantifies the pollution in waste water; one pollution equivalent = 150 g TOD (Total Oxygen Demand).
One pollution equivalent is the daily quantity of oxygen-demanding material in the waste water of one person. The degree of pollution in the waste water produced by the private sector is also expressed in pollution equivalents.
This unit is used as of 2010, so for previous years no values are available.

Chemical oxygen demand (COD): Chemical oxygen demand (COD). Measure of the amount of oxygen consumed when a substance is degraded chemically.

Biochemical oxygen demand (BOD): Biological oxygen demand (BOD). Measure of the amount of oxygen consumed when a substance is biodegraded.

Nitrogen compounds as N (total): The total amount of nitrogen in organic compounds (e.g. proteins) and inorganic compounds (e.g. nitrate and ammonium).

Phosphorus compounds as P (total): The total amount of phosphates and other phosphorus compounds in waste water, measured as phosphorus (P).

Copper

Chromium

Zinc

Lead

Cadmium

Nickel

Mercury

Arsenic

Sewage sludge

Residue of treated waste water consisting of suspended solids and excess active sludge (biomass). Sewage sludge is measured including water (see Total wet sludge) or as dry solids.

Wet sewage sludge by destination

The volume of wet sewage sludge, i.e. including water by destination (processing method).

Total wet sludge: Total wet sludge discharged.

Agriculture: Application of manure or soil improver in agriculture. Due to rigid legislation impossible since 1995.

Wet oxidation: Wet oxidation of sludge in so-called VerTech installations: the sludge is oxidised under high pressure in a deep shaft.

Composting

Landfill: Dumping of sludge on regional landfill sites or special sludge depots.

Incineration: Incineration of sludge in special sludge incineration plants or in household waste incinerators.

Cement industry: Co-incineration in cement ovens.

Co-incineration at power plants: Sewage sludge used as a secondary fuel at a power plant.

Other destinations: Mainly reuse.

Dry solids by destination

Discharged sewage sludge in kilogrammes of dry solids by destination (processing method). Dry solid is the residue of sewage sludge after evaporation at 105 degrees centigrade.

Total dry solids

Agriculture: Application of manure or soil improver in agriculture. Due to rigid legislation impossible since 1995.

Wet oxidation: Wet oxidation of sludge in so-called VerTech installations: the sludge is oxidised under high pressure in a deep shaft.

Composting

Landfill: Dumping of sludge on regional landfill sites or special sludge depots.

Incineration: Incineration of sludge in special sludge incineration plants or in household waste incinerators.

Cement industry: Co-incineration in cement ovens.

Co-incineration at power plants: Sewage sludge used as a secondary fuel at a power plant.

Other destinations: Mainly reuse.

Nutrients and heavy metals

The total weight of nutrients and heavy metals removed with the sludge. Most heavy metals adsorb strongly to the sludge particles.

Ashes: The residue of non-inflammable, inorganic matter after incineration.

Nitrogen compounds as N: The total amount of nitrogen in organic compounds (e.g. proteins) and inorganic compounds (e.g. nitrate and ammonium).

Phosphorus compounds as P: The total amount of phosphorus in sewage sludge is analysed as P205 (diphosphorus pentoxide) converted to P total.

Copper

Chromium

Zinc

Lead

Cadmium

Nickel

Mercury

Arsenic