好氧颗粒污泥自生动态膜生物反应器处理碱减量印染废水

自生动态膜生物反应器(SFDMBR)接种颗粒污泥启动,研究溶解氧浓度和水力停留时间对该反应器处理碱减量印染废水的影响。自生动态膜生物反应器形成稳定的动态膜后,出水浊度小于10 NTU,系统对浊度的去除率在90%以上,溶解氧和水力停留时间对反应器出水浊度基本无影响。系统对废水色度的去除率随着溶解氧浓度的提高和水力停留时间的延长而增加,但是系统对色度的去除效率一般不超过40%。溶解氧浓度由0.3 mg/L逐渐增大至2.4 mg/L,COD的去除率由40%提升至80%,而当溶解氧浓度大于1.0 mg/L后,UV254的去除率达到95%。水力停留时间在8~48 h时,COD去除效率由65%逐渐上升至85%左右;水力停留时间在8~32 h,UV254去除效率为68%~93%,超过32 h后水力停留时间对UV254去除效率的影响已不明显。

Self-forming dynamic membrane bio-reactor treating of alkali-decrement and dyeing-printing wastewater by aerobic granular sludge

Seeded with granular sludge, a self-forming dynamic membrane bioreactor (SFDMBR) treating alkali-decrement and dyeing-printing wastewater was started to research the effects of dissolved oxygen(DO) and hydraulic retention time(HRT) on its operating results. The results showed that DO and HRT had little influence on the effluent turbidity when a stable dynamic membrane was formed and the effluent turbidity was less than 10 NTU with more than 90% removal rate. The removal rate of chromaticity increased proportionately with increasing DO and HRT while the efficiency was generally not more than 40%. The removal rate of COD increased from 40% to 80% when DO was from 0.3 mg/L to 2.4 mg/L, and that of UV₂₅₄ was about 95% when DO was more than 1.0 mg/L.The removal rate of COD gradually increased from 65% to 85% when HRT was from 8 h to 48 h and that of UV₂₅₄ increased from 68% to 93% when HRT was from 8 h to 32 h. The impact of HRT on UV₂₅₄ removal was unobvious when HRT was more than 32 h.