一体化A/O工艺处理生活污水的研究

采用A/O生物接触氧化法处理生活污水,考查了系统的挂膜启动以及水力停留时间(HRT)、进水pH值和进水COD浓度对系统去除有机物及脱氮效果的影响。结果表明:15 d左右挂膜成功;HRT=13 h,COD去除率和氨氮去除率可分别达到96.72%、85.43%;系统具有较好的抗冲击负荷能力,COD去除率最低在70%左右,氨氮去除率均大于65%,最佳的进水COD质量浓度应控制在300~500mg/L;pH值变化对氨氮去除率的影响更加明显,pH值在7~8时,COD去除率大于90%,氨氮去除率达68%~80%。

Study on Treatment of Domestic Wastewater by A/O Fixed Biofilm Reactor

In this paper the A/O fixed biofilm reactor is used for domestic wastewater treatment and the effects of growing biofilm on the carrier,HRT,influent organic loading and PH on decarbonization and denitrification are investigated.The results show that the growing biofilm should be 15 d;the removal rate of COD and ammonia nitrogen can respectively reach 96.72% and 85.43% with 13 h of HRT;the anti-shock loading capability of the system is considered to be good,the removal rate of COD and ammonia can reach at least 70% and 65% when influent COD concentrations ranges from 100-900 mg/L,but it should be controlled among 300-500 mg/L;change of pH obviously affects the removal of ammonia nitrogen and the removal rate of COD and ammonia nitrogen can respectively reach above 90% and around 68%-80% with pH=7-8.