Chemical pulping

The wastewater is mainly produced by material preparation, cooking, bleaching, evaporation and other sections. The main pollutants are chemical oxygen demand (CODcr), five-day biochemical oxygen demand (BOD5), suspended solids (SS) and ammonia nitrogen. The concentration of pollutants: CODcr 1200 ~ 2500 mg / L, BOD5 350 ~ 800 mg / L, SS 250 ~ 1500 mg / L, ammonia nitrogen   2~5 mg/L。     Chemical mechanical pulping

The waste water is mainly produced by material preparation, wood chip washing, washing, screening and other sections, and the main pollutants are as follows   CODCr、BOD5、SS   And ammonia nitrogen. The concentrations of pollutants: CODcr 6000 ~ 16000 mg / L, BOD5 1800 ~ 4000 mg / L, SS 1800 ~ 3800 mg / L, ammonia nitrogen   3~5 mg/L。

  Waste paper pulping

The wastewater is mainly produced by washing, screening, deinking and bleaching, and the main pollutants are as follows   CODCr、BOD5、SS   And ammonia nitrogen. The concentrations of pollutants: CODcr 1200 ~ 6500 mg / L, BOD5 350 ~ 2000 mg / L, SS 450 ~ 3000 mg / L, ammonia nitrogen   2~15 mg/L。

  Machine made paper and paperboard

Wastewater is mainly produced by beating, flowing, forming, pressing, sizing or coating, and the main pollutants are as follows   CODCr、BOD5、   SS   And ammonia nitrogen. The concentrations of pollutants: CODcr 500 ~ 1800 mg / L, BOD5 180 ~ 800 mg / L, SS 250 ~ 1300 mg / L, ammonia nitrogen   1~3 mg/L。

Test index

Black pulp water   Total alkali    content

White water   Calcium ion / sulfate   content

In pulp   Chlorate / chloride / acidity   content