絮凝颗粒化菌藻系统净化缓流微污染河水  

Purification of slightly polluted slow-flow water by flocculating particles of photosynthetic bacteria and chlorella

作　　者：张正红[1] 向天勇[1] 何文辉[1] 石玉波[1] 陆慧明 Zhang Zhenghong;Xiang Tianyong;He Wenhui;Shi Yubo;Lu Huiming(Modern Agricultural College of Jiaxing Vocational Technical College,Jiaxing 314036;Agricultural Technology and Water Conservancy Service Center of Yaozhuang Town,Jiashan 310023)

机构地区：[1]嘉兴职业技术学院现代农业学院,浙江嘉兴314036 [2]嘉善县姚庄镇农技水利服务中心,浙江嘉善314117

出　　处：《环保科技》2023年第2期7-12,共6页Environmental Protection and Technology

基　　金：嘉兴市公益性研究计划项目(2019AY11016);嘉善县科技计划项目(2019D01);浙江省软科学研究计划项目(2021C35121)。

摘　　要：采用铁镁改性粉煤灰絮凝剂絮凝沉淀得到光合细菌和小球藻絮凝颗粒,然后通过颗粒化菌藻系统进行了缓流微污染水体原水净化处理,优化了絮凝剂投加量,研究了水力停留时间(HRT)和菌、藻比对污染物去除效果的影响。结果表明,菌液(藻液)中絮凝剂质量浓度达到500 mg/L以上即可使光合细菌和小球藻絮凝率均超过94%;光合细菌、小球藻絮体颗粒总投加量为0.5%(体积比),HRT为48 h,菌/藻比(体积比)为1:1时,COD、氨氮、总氮和总磷的去除率分别达到59.86%~62.16%、61.35%~63.72%、76.98%~79.42%和65.48%~68.32%,出水中COD、氨氮、总氮和总磷浓度分别为1.75~4.31 mg/L、0.18~0.59 mg/L、0.30~0.96 mg/L和0.05~0.09 mg/L,系统具有稳定的净化效果。The flocculating particles of photosynthetic bacteria and chlorella were obtained by flocculation and precipitation using Fe-Mg modified fly ash flocculant.The raw water of the slightly polluted slow-flow river was purified by the flocculating particles of photosynthetic bacteria and chlorella.The dosage of flocculant was optimized.The effect of hydraulic retention time and ratio of bacteria-algae on the removal of pollutants were studied.The results showed that the flocculation rate of photosynthetic bacteria and chlorella was more than 94%when the concentration of flocculant in the bacterial solution(algal solution)was more than 500 mg/L.When the total dosage of photosynthetic bacteria and chlorella flocculating particles was 0.5%(volume ratio),HRT was 48h,and the ratio of bacteria-algae(volume ratio)was 1:1,the removal rates of COD,ammonia nitrogen,total nitrogen and total phosphorus were 59.86%-62.16%,61.35%-63.72%,76.98%-79.42%,and 65.48%-68.32%,respectively.The concentrations of COD,ammonia nitrogen,total nitrogen and total phosphorus in the effluent were 1.75-4.31 mg/L,0.18-0.59 mg/L,0.30-0.96 mg/L and 0.05-0.09 mg/L respectively.The purification effect of the bacteria-algae system is stable.

关 键 词：絮凝颗粒 菌藻系统 净化 微污染 缓流水体 

分 类 号：X52[环境科学与工程—环境工程]