Zhoushan seafood processing wastewater treatment

The flat ceramic membrane has been successfully applied to the treatment of Zhoushan seafood processing wastewater, which is of great significance to the protection of the marine environment.

     The amount of seafood processing wastewater is large; the concentration of organic matter is high. And there are many macromolecule organic substances such as protein, oil and so on. The processing water uses seawater, resulting in a large number of high salinity seafood processing wastewater. The water quality is complex, and the treatment is difficult. In the wastewater treatment of seafood industrial park, the traditional technology adopted at home and abroad is mainly coagulation + contact oxidation process, air flotation - enhanced A-stage A/O process, air flotation + A/O+CASS process, hydrolysis acidification + biological contact oxidation process, UASB + aerobic treatment process, air flotation + SBR process. These traditional processes are often difficult to meet the discharge standards.

 The influent water   quality of Zhoushan 3000   tons/day seafood   processing wastewater is   COD 4000mg/l, BOD   1000mg/l, SS 500mg/l,   ammonia nitrogen 200mg/l, PH value 6-9. It is very difficult to treat this kind of wastewater. A lot of small and pilot tests were did for this kind of wastewater, and finally the "anaerobic + aerobic + flat ceramic membrane PC-MBR" technology was determined because it is feasible, economical and reasonable, and suitable for local conditions.