Methods for determining hazardous thresholds for sludge from water treatment process in Vietnam

09:18, 31/10/2013

Recently, the Ministry of Natural Resources and Environment issued Circular 32/2013/TT-BTNMT on promulgation of national technical regulations on environment in Vietnam.

Methods for determining hazardous thresholds for sludge from water treatment process in Vietnam (Internet image)

Circular 32/2013/TT-BTNMT stipulates methods for determining hazardous thresholds for sludge from water treatment process in Vietnam as follows:

1. Sludge shall be sampled in accordance with instructions in the following national standards:

- TCVN 6663-13:2000 - Water quality – Sampling. Part 13: Guidance on sampling of, wastewater and related sludge;

- TCVN 6663-15:2004 - Water quality – Sampling. Guidance on preservation and handling of sludge and sediment samples.

2. Factors in sludge shall be determined in accordance the following national and international standards:

- ASTM D4980-89: Standard test method for screening of pH in waste.

- Solid wastes - The toxicity characteristic leaching procedure.

- TCVN 9240:2012 - Standard test method for single batch extraction method for wastes.

- EPA SW-846 - Method 9010 or 9012: Determination of Cyanide in wastes.

- US EPA 9071 B - Method 9071 B n-Hecxan extractable material (HEM) for sludge, sediment, and solid samples.

3. Solution analysis after leaching:

Accredited national and international standards shall apply to determination of leaching concentrations of hazardous components.

More details can be found in Circular 32/2013/TT-BTNMT, which comes into force from January 1, 2014.

Ty Na

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