Wastewater type

Cotton pulping black liquor

Treatment scale

40000 t/d

Treatment level

BOD (mg/L)

COD (mg/L)

pH

Before treatment

1700

4270

12-14

After treatment

30-50

70-92

0-9

Treatment technics

Neutralization- VTBR- coagulation- mixing with other kinds of wastewater- biotreatment

Investment of engineering

20 million Yuan for renovation part

Operation fee

1.60 Yuan/t water (for renovation part)

Operation time

Acceptance department

Xinxiang Environmental Protection Agency