制药废水经稳定塘处理用于农灌的可行性探讨

利用以厌氧塘为主体,以预沉池、二级厌氧塘、兼性塘组成的工艺,探讨了制药废水经过稳定塘处理后用于农灌的途径。在停留时间为7—11d时,COD去除率冬季为47％,夏季达到76.6％,夏季厌氧塘削减COD负荷达150g/m~3·d.其出水水质指标基本满足灌溉要求.还对气温、有机负荷、pH等对处理效果的影响进行了探讨。

Feasibility Study on the Preliminary Treatment of Pharmaceutical Wasrewater with Stabilization Pond

Considering the character of dry land in northen part of China, a wastewater reclamation method has been suggested by using stabilization pond treatment. The pond system, consisting of presetling, two-step anaerobic pond and a facultatire pond was used for the pretiminary treatment of pharmaceutical wastewater. The effluent from such treatment can be used as irrigation water. When the retention time was equal 7 to 9 days, the COD removal rate of such system was 76.6% in the summer time and 47% in the winter. Other parameters of the treated water could also meet the demand of agricultural irrigation, which may affect COD remoral efficiency such as temperature, organic load and pH, were examined in the study. The results of the study demostrates that the stabilization pond system possesses the advantages of high efficiency for the removal of COD and less occupancy of land.