Case 2

A new project of sulfanilamide raw material production wastewater

Picture of biochemical tank and pretreatment reactor of sewage station.

1. Quantity 500 -- 600m3/d,

2. Process flow:

Pretreatment of Oxidization === biochemical tanks (anaerobic+ facultative + aerobic) === MBR +NF+RO ===salt extraction from clear water

3. Salinity of biochemical tanks:

anaerobic 8%~10%,

aerobic: 3%~4%

4. Water quality:

Number	index, mg/L	raw wastewater	discharge
1	COD	15000~20000	<500
2	NH3-N	500~1000	<30
3	TP	10-20	<3
4	SALINITY	80000~100000	<0.5%