复合混凝沉淀用于生态补水水体除磷
|
摘要
[目的]考察PAC、硅藻土和PAM这3种混凝剂协同混凝沉淀法的除磷效率。[方法]在研究PAC和硅藻土对湖泊原水除磷控藻效率的基础上,进一步研究了PAM作为助凝剂在混凝沉淀过程中的强化作用,探索不同总磷浓度进水条件下复合混凝剂的最佳比例及投加量。[结果]投加少量的PAM可有效降低硅藻土和PAC用量;当进水总磷浓度为0.59 mg/L时,投加40 mg/L硅藻土+PAC(1∶1)复合无机混凝剂及0.75 mg/L高分子助凝剂PAM,即可达86%的总磷去除率。[结论]塘西河生态补水工程采用混凝沉淀法去除巢湖原水中磷,为塘西河提供清洁水源,解决了其水量短缺、水质恶化的难题。
[Objective] The research aimed to investigate the phosphorus removal efficiency of the coagulation and sedimentation method of PAC, diatomaceous earth and PAM.[Method]On the basis of studying the efficiency of PAC and diatomite in removing phosphorus and controlling algae in lake raw water, the strengthening effect of PAM as coagulant during coagulation and precipitation was further studied, and the optimal proportion and dosage of compound coagulant under different total phosphorus concentration were explored.[Result] The amount of diatomaceous earth and PAC could be effectively reduced by adding a small amount of PAM. When the total phosphorus concentration of water was 0.59 mg/L, the removal rate of about 86% of total phosphorus could be achieved by adding 40 mg/L diatomite+PAC(1∶1) composite inorganic coagulant and 0.75 mg/L polymer coagulant PAM. [Conclusion]The ecological water replenishing project of Tangxi River uses coagulation sedimentation method to remove phosphorus from Chaohu Lake raw water, provides clean water source for Tangxi River, and solves the problem of water shortage and water quality deterioration.
[Objective] The research aimed to investigate the phosphorus removal efficiency of the coagulation and sedimentation method of PAC, diatomaceous earth and PAM.[Method]On the basis of studying the efficiency of PAC and diatomite in removing phosphorus and controlling algae in lake raw water, the strengthening effect of PAM as coagulant during coagulation and precipitation was further studied, and the optimal proportion and dosage of compound coagulant under different total phosphorus concentration were explored.[Result] The amount of diatomaceous earth and PAC could be effectively reduced by adding a small amount of PAM. When the total phosphorus concentration of water was 0.59 mg/L, the removal rate of about 86% of total phosphorus could be achieved by adding 40 mg/L diatomite+PAC(1∶1) composite inorganic coagulant and 0.75 mg/L polymer coagulant PAM. [Conclusion]The ecological water replenishing project of Tangxi River uses coagulation sedimentation method to remove phosphorus from Chaohu Lake raw water, provides clean water source for Tangxi River, and solves the problem of water shortage and water quality deterioration.
引文
[1] 李学平,李甲亮,任加云.生态城市主要景观生态河道的水污染研究[J].环境科学与技术,2014,37(120):428-431.
[2] 郑天柱,周建仁.污染河道的生态恢复机理研究[J].环境科学动态,2002(3):11-13.
[3] 陈昂,隋欣,廖文根,等. 我国河流生态基流理论研究回顾[J].中国水利水电科学研究院学报,2016,14(6):401-411.
[4] 吴蕾.巢湖水用于城市景观河道生态补水工程[J].中国给水排水,2013,29(6):69-72.
[5] WANG H J,LIANG X M,JIANG P H,et al.TN:TP ratio and planktivorous fish do not affect nutrient-chlorophyll relationships in shallow lakes[J]. Freshwater biology,2008,53(5):935-944.
[6] 郑西强.陈云峰.高效除磷硅藻土用于城市景观水体的治理[J].中国给水排水,2012,28(5):32-35.
[7] 郑利祥,周如禄,郭中权.混凝技术处理塌陷区低浊水的试验研究[J].环境科学与技术,2013,36(10):157-160.
[8] 李风亭,张善发,赵艳.混凝剂与絮凝剂[M].北京:化学工业出版社,2005.
[2] 郑天柱,周建仁.污染河道的生态恢复机理研究[J].环境科学动态,2002(3):11-13.
[3] 陈昂,隋欣,廖文根,等. 我国河流生态基流理论研究回顾[J].中国水利水电科学研究院学报,2016,14(6):401-411.
[4] 吴蕾.巢湖水用于城市景观河道生态补水工程[J].中国给水排水,2013,29(6):69-72.
[5] WANG H J,LIANG X M,JIANG P H,et al.TN:TP ratio and planktivorous fish do not affect nutrient-chlorophyll relationships in shallow lakes[J]. Freshwater biology,2008,53(5):935-944.
[6] 郑西强.陈云峰.高效除磷硅藻土用于城市景观水体的治理[J].中国给水排水,2012,28(5):32-35.
[7] 郑利祥,周如禄,郭中权.混凝技术处理塌陷区低浊水的试验研究[J].环境科学与技术,2013,36(10):157-160.
[8] 李风亭,张善发,赵艳.混凝剂与絮凝剂[M].北京:化学工业出版社,2005.