缺氧池-水车双侧驱动式生物转盘耦合装置性能研究

Performance Study on Coupling Device of Anoxic Tank-Waterwheel Dual-Side-Drive Type Rotating Biological Contactor

结合已有生物生态工艺,将黑水、灰水分开收集处理,提出"黑水厌氧-混合污水缺氧-好氧-人工湿地"组合工艺。探究组合工艺中"缺氧-好氧"部分,即"缺氧池-水车双侧驱动式生物转盘"耦合装置的工艺运行与污染物去除规律。结果表明,水车双侧驱动式生物转盘对COD去除效果良好,出水均维持在50 mg/L以下,且COD去除效果主要受进水有机负荷影响。当好氧段水力停留时间为3 h、回流比为100%时,系统TN和NH_4^+-N去除率达到最高,分别为47.4%和95.2%,其中水车双侧驱动式生物转盘对NH_4^+-N的去除率达91.4%。该生物生态组合工艺总体运行良好,出水水质可稳定达GB 18918-2002中的一级A标准。

Combined with the existing combined bio-ecological process, a combined process of black water anaerobic-mixed sewage anoxic- aerobic- constructed wetland was proposed to treat black water and grey water separately. The process operation and pollutants removal orders of the ＂anoxic- aerobic＂ part of combined process, namely ＂coupling device of anoxic tank- waterwheel dual-side-drive type rotating biological contacted＇ were investigated. The results showed that waterwheel dual-side-drive type rotating biological contactor had good effect on COD removal, the concentration of COD in aerobic effluent was stably below 50 mg/L, and the COD removal was mainly affected by the influent organic load. When the hydraulic retention time and reflux ratio were 3 h and 100% respectively, the system removal rate of TN and NH4＋-N both reached a maximum of 47.4% and 95.2%, respectively. And the removal rate of NH4＋-N in waterwheel dual-side-drive type rotating biological contactor was 91.4%. In general, the combined bio-ecological process generallv worked well. and effluent water auality could stably reach the first made level A of GB 18918-2002.