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The Effect of Enhanced Coagulation Sedimentation by Combining Application of Aluminum Sulfate and Recycled Fibers
  
DOI：10.11980/j.issn.0254-508X.2018.04.007
Key Words:recycled fiber  aluminum sulfate  coagulation and sedimentation
Fund Project:福建省中青年教师教育科研项目（JAT160642）;厦门大学嘉庚学院校级科研孵化项目（2015L09）。
Author NameAffiliation
HUANG Jin-yang1，2，* 1.College of Environment and Ecology， Xiamen University， Xiamen，Fujian Province， 361102
2. Xiamen University Tan Kah Kee College， Zhangzhou， Fujian Province， 363105 
LU Chang-yi1，2 1.College of Environment and Ecology， Xiamen University， Xiamen，Fujian Province， 361102
2. Xiamen University Tan Kah Kee College， Zhangzhou， Fujian Province， 363105 
LIN Lan-xin1 1.College of Environment and Ecology， Xiamen University， Xiamen，Fujian Province， 361102 
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Abstract:The treatment effect of surface water through coagulation and sedimentation experiment by combining application of aluminum sulfate and recycled fibers was studied. The enhanced coagulation sedimentation function of recycled fibers was also discussed. The experimental results demonstrated that when the raw water′s turbidity was 14.7～21.8 NTU and temperature was 12～14℃， adding aluminum sulfate with the dosage was 20 mg/L and stiring for 1 min at 200 r/ min， then adding 20 mg/L of recycled fibers and stirring at 100 r/min for 5 min at 50 r/min for 10 min， sedimentation for 20 min， the turbidity of the effluent was 1.37～2.03 NTU， which was improved more than 50% compared with the use of aluminum sulfate alone. The application of recycled fibers not only could increase the settling rate of flocs， but also reduce CODMn and residual aluminum， enhance the coagulation and sedimentation．
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