生物/化学组合工艺处理高盐榨菜废水的除磷效能  

Efficiency of Phosphorus Removal from High-salinity Mustard Tuber Wastewater by Combined Biological/Chemical Process

作　　者：王夏敏[1] 周健[1] 龙腾锐[1] 刘俊[1] 

机构地区：[1]重庆大学三峡库区生态环境教育部重点实验室,重庆400045

出　　处：《中国给水排水》2008年第7期29-33,共5页China Water & Wastewater

基　　金：重庆市科委攻关项目(7986)

摘　　要：针对高盐度废水生物除磷的难点问题,采用生物/化学组合工艺处理高盐度、高磷、高氮的榨菜腌制废水,考察了运行工况、挂膜密度、排泥周期、药剂种类和投加量等对除磷效能的影响。试验结果表明:采用厌氧/生物除磷/生物脱氮/化学除磷组合工艺除磷高效、可行,当一级SBBR生物除磷单元的挂膜密度为60%、排泥周期为2 d、运行工况为进水(0.2 h)—厌氧(3 h)—好氧(6 h)—沉淀及排水(0.2 h),化学除磷单元按物质的量之比为9∶1投加硫酸铝时,在进水COD及PO43--P分别为10 000 mg/L和38.5 mg/L的条件下,出水COD和PO43--P分别为90和0.1mg/L,去除率均达到了99%以上。生物除磷、生物脱氮、化学除磷单元的除磷分担率分别为56.6%、20.8%和22%。Aimed at the difficulty in biological phosphorus removal from high-salinity wastewater, the combined chemical/biological process was used to treat mustard tuber wastewater with high salinity, high phosphorus and high nitrogen. The influence of operating mode, biofilm density, sludge discharge cycle, chemicals and dosage on phosphorus removal efficiency was investigated. The experimental results show that the combined process of anaerobic technology/biological phosphorus removal/biological denitri- fication/chemical phosphorus removal is highly efficient and feasible. When the biofilm density is 60%, the sludge discharge cycle is 2 d and the operating mode is influent 0.2 h - anaerobic 3 h - aerobic 6 h - depositing and effluent 0.2 h in the biological phosphorus removal unit of primary SBBR, and aluminum sulphate is added in a controlled ratio of 9 ： 1 in chemical phosphorus removal unit, the COD and PO4^3- - P concentrations are reduced from 10 000 mg/L and 38.5 mg/L to 90 mg/L and 0.1 mg/L with the removal rates of more than 99%. The phosphorus removal efficiency of biological phosphorus removal unit, biological denitrification unit and chemical phosphorus removal unit is 56.6%, 20.8% and 22% respectively

关 键 词：榨菜腌制废水 高盐度 生物除磷 化学除磷 

分 类 号：X703[环境科学与工程—环境工程]