缺氧反硝化-好氧间歇试验处理印染PVA退浆废水

系统研究了投加硝态氮NO3^--N的反硝化工艺在缺氧，好氧，生物碳间歇试验中处理印染PVA退浆废水的效果。结果表明．按照缺氧反硝化投加硝态氮NO3^--N比缺氧水解-生物膜法对CODcr的去除率：缺氧池，好氧池均提高了30％．缺氧反硝化工艺二沉池出水经过生物碳处理后CODcr的去除率达到90％。缺氧反硝化，好氧的降解速率常数分别由缺氧水解，好氧的0．0126h^-1，0．0345h^-1，提高到0．080h^-1,0．112h^-1,NO3^--N与CODcr之比为0．20是处理印染PVA退浆废水成功的关键。

Treatment on Degradation of PVA by Anoxic Denitrification-Aerobic Batching Test

Treatment of polyvinyl alcohol (PVA) has been studied by denitrification technology in anoxic, aerobic and biocarbon added NO3-N batching test. It was found that the removal rate of CODcr in anoxic denitrification was increased by 30% in comparison with that in anoxic hydrolysis-bio-contact oxidation in anoxic tank and aerobic tank. The removal rate of CODcr was more than 90% after secondary sedimenta-tion in anoxic denitrification technology treated by biocarbon. Degradation rate constant of anoxic denitrification and aerobic were 0.080 h1 and 0.112 h-1 respectively. The proportion of C:N:P was 0.20. It is the key for treatment of PVA wasterwater.