摘要
为了同时提高新鲜蓝藻浆和陈腐蓝藻浆的浓缩效率,降低能耗,采用外加压力压破蓝藻细胞内气囊,蓝藻失去气囊浮力,再经结团絮凝沉淀分离。采用中试实验研究了加压结团絮凝浓缩处理新鲜和陈腐蓝藻浆的技术方法,优化了工艺参数。结果表明,在原藻浆含水率为99.2%~99.4%时,新鲜藻浆最佳的混凝剂(PAC)投加量与干藻质量比为1/20,最佳的助凝剂(PAM)投加量与干藻质量比为1/1 500;而处理陈腐藻浆时最佳的混凝剂(PAC)投加量与干藻质量比为1/1.5,最佳的助凝剂(PAM)投加量与干藻质量比为1/300。浓缩后出水浊度在1~8 NTU之间,处理新鲜藻浆时的叶绿素a控制在6 mg/m^3以内,处理陈腐藻浆时的叶绿素a控制在50 mg/m^3以内,浓缩藻泥含水率都小于97%。
In order to improve the concentration efficiency ofthe cankered and fresh cyanobacteria, and reduce energy consumption, applied pressure could crush eyanobacteria balloon, and then the cyanobacteria lost balloon buoyancy that could isolate, coagulated and sedimentate by the pellet flocculation. Pilot experimental study on the treatment of flesh cyanobacteria and rotten cyanobacteria by pellet flocculation, and optimized the process parameters and economic analysis. Experimental results showed that when the moisture content in raw water algae was 99.2%~99.4%, the optimal dosage ratio of coagulant （PAC） and dry algae was 1/20, and the optimal dosage ratio of flocculant （PAM） and dry algae was 1/1500 in the light of fresh eyanobaeteri. In the light of rotten eyanobacteri, optimal dosage ratio of coagulant （PAC） and dry algae was 1/1.5, and optimal dosage ratio of floceulant （PAM） and dry algae was 1/300. With this dosage, the turbidity of concentration effluent was between 1-8 NTU, chlorophyll a was controlled within 6 mg/m3 and 50 mg/m3 in fresh and rotten eyanobaeteria respectively, and concentration cyanobacteria mud moisture content was less than 97%.
作者
丁凯耘
丛海兵
朱学源
徐湖
徐亚军
DING Kaiyun CONG Haibing ZHU Xueyuan(School of Environmental Science and Engineering, Yangzhou University, Yangzhou 225009, China Jiujiufu Environmental Science and Technology Co., Ltd, Suzhou 215316, China)
出处
《水处理技术》
CAS
CSCD
北大核心
2017年第2期38-44,共7页
Technology of Water Treatment
基金
江苏省科技支撑计划项目(BE2014681)
扬州市市校合作研究项目(2014-4)
关键词
蓝藻
加压
结团絮凝
浓缩
cyanobacteria
pressure
pellet flocculation
concentrate
