缺氧反硝化-好氧串联系统对难降解PVA退浆废水的试验研究

Treatment of polyvinyl-alcohol wastewater using combined anoxic denitrification-aerobic process

研究了投加硝态氮 NO- 3 - N对缺氧反硝化 -好氧和缺氧水解 -好氧串联系统处理印染 PVA退浆废水的效果。结果表明 ,缺氧反硝化投加硝态氮 NO- 3 - N比缺氧水解 -好氧对 CODCr的去除率在缺氧池、好氧池中均提高了 30 % ,缺氧反硝化 -好氧工艺二沉池出水经生物碳处理后 ,CODCr的去除率达 90 %。 C∶ N∶ P的比例合适与否是处理印染

The treatment of polyvinyl-alcohol was studied using com bined anoxic denitrification-aerobic and anoxic hydrolysis-aerobic added NO\+-\-3-N treatment system. It was found that the removal rate of COD\-\{Cr\} in anoxic denitrification was increased by 30% in comparison with that in anoxic hydrolysis-aerobic in anoxic tank and aerobic tank. The removal rate of COD\-\{Cr\} was more than 90% after secondary sedimentation in anoxic denitrification stage using biocarbon.The proportion of C∶N∶P is the key for treatment of PVA wastewater.