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Wastewater, Industrial Discharge Standards (TCVN 5945, 1995)

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INDUSTRIAL WASTE WATER
DISCHARGE STANDARDS
TCVN 5945-1995

1. Scope

1.1 This standard specifies limit values of parameters and concentration of substances in industrial waste water.

In this standard industrial waste water means: liquid water or waste water produced by reason of working or production processes taking place at any industrial, servicing and trading premises, etc.

1.2 This standard is applied to control of quality of industrial waste waters before being discharged into a water body.

Water body means: inland water, include any reservoir, pond, lake, river, stream, canal, drain, spring or well, any part of the sea abutting on the foreshore, and any other body of natural or artificial surface or subsurface water.

2. Limitation Values

2.1 Values of parameters and maximum allowable concentrations of substances in industrial waste waters before being discharged into water bodies are shown in the table 1.

2.2 Discharge standards applying for waste waters produced by specific industry such as paper, textile or oil industries are specified in a separate standard, respectively.

2.3 Industrial waste waters containing the values of parameters and concentrations of substances which are equal to or lower than the values specified in the column A (table 1) may be discharged into the water bodies using for sources of domestic water supply.

2.4 Industrial waste waters containing the values of parameters and concentration of substances which are lower than or equal to those specified in the column B (table 1) are discharged only into the water bodies using for navigation, irrigation purposes or for bathing, aquatic breeding and cultivation, etc.

2.5 Industrial waste waters containing the values of parameters and concentrations of substances which are greater than those specified in the column B but not exceeding those specified in the column C (table 1) are discharged only into specific water bodies permitted by authority agencies.

2.6 Industrial waste water containing the values of parameters and concentrations of substances which are greater than those specified in the column C (table 1) shall not be discharged into surroundings.

2.7 Standard methods of analysis of parameters and concentration of substances in industrial waste waters are specified in available current TCVNs.

Table 1
Industrial Waste Water: Limit Values of Parameters and
Maximum Allowable Concentration of Pollutants

Nº	Parameters and Substances	Unit	Limitation Values
Nº	Parameters and Substances	Unit	A	B	C
1	Temperature	ºC	40	40	45
2	pH value		6 - 9	5,5 - 9	5 - 9
3	BOD₅ (20ºC)	mg/l	20	50	100
4	COD	mg/l	50	100	400
5	Suspended solids	mg/l	50	100	200
6	Arsenic	mg/l	0,05	0,1	0,5
7	Cadmium	mg/l	0,01	0,02	0,5
8	Lead	mg/l	0,1	0,5	1
9	Residual Chlorine	mg/l	1	2	2
10	Chromium (VI)	mg/l	0,05	0,1	0,5
11	Chromium (III)	mg/l	0,2	1	2
12	Mineral oil and fat	mg/l	Not detectable	1	5
13	Animal-vegetable fat and oil	mg/l	5	10	30
14	Copper	mg/l	0,2	1	5
15	Zinc	mg/l	1	2	5
16	Manganese	mg/l	0,2	1	5
17	Nickel	mg/l	0,2	1	2
18	Organic phosphorous	mg/l	0,2	0,5	1
19	Total phosphorous	mg/l	4	6	8
20	Iron	mg/l	1	5	10
21	Tetrachlorethylene	mg/l	0,02	0,1	0,1
22	Tin	mg/l	0,2	1	5
23	Mercury	mg/l	0,005	0,005	0,01
24	Total nitrogen	mg/l	30	60	60
25	Trichlorethylene	mg/l	0,05	0,3	0,3
26	Ammonia (as N)	mg/l	0,1	1	10
27	Fluoride	mg/l	1	2	5
28	Phenol	mg/l	0,001	0,05	1
29	Sulfide	mg/l	0,2	0,5	1
30	Cyanide	mg/l	0,05	0,1	0,2
31	Coliform	MPN/100 ml	5000	10000	--
32	Gross alpha activity	Bq/l	0,1	0,1	--
33	Gross beta activity	Bq/l	1,0	1,0	--

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Acknowledgement: Text courtesy of NEA Policy Division, MOSTE.

Disclaimer: APCEL has tried to ensure the accuracy, reliability and completeness of the information in this database; however, APCEL does not guarantee the accuracy, reliability or completeness of this information. If you encounter an error, please notify us by e-mail at lawapcel@nus.edu.sg.

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