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Application of PAC in Papermaking Sludge Treatment
  
DOI：10.11980/j.issn.0254-508X.2018.03.002
Key Words:polyaluminum chloride  physicochemical properties  high dehydration rate  incineration
Author NameAffiliation
YAN Yong-xiang1，2 1.Changsha University of Science and Technology，Changsha， Hunan Province，410114
2 BaiLin Biotechnology Co.， Ltd.， Changsha，Hunan Province，410205 
LI Bang-han1，2，* 1.Changsha University of Science and Technology，Changsha， Hunan Province，410114
2 BaiLin Biotechnology Co.， Ltd.， Changsha，Hunan Province，410205 
SONG Fu-sheng3 3.YueyangFengli Paper Co.， Ltd.， Yueyang， Hunan Province， 414100 
CHEN Qi-jie1 1.Changsha University of Science and Technology，Changsha， Hunan Province，410114 
WANG Qing-feng2 2 BaiLin Biotechnology Co.， Ltd.， Changsha，Hunan Province，410205 
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Abstract:The relationship between the change of water content and volume change of papermaking sludge was briefly described and analyzed. From engineering point of view， adding 0.4 g PAC with 10% alumina content and 5 g CPAM with 0.2% solid content could effectively treat 200 g paper sludge with concentration of 2%. The new process used concentration conditioning pool， the sludge concentration could be increased to 4%～6%. Then the sludge was pumped to frame filter press by using a plunger pump， the dryness of dehydrated sludge could be up to 50% or even higher. A single device could handle 4.5 tons of oven dry sludge per working cycle（4 hours）.The dried sludge could be used as fuel after being crushed and mixed with coal， per ton of dried sludge could produce heat 292.56 MJ through incineration， which could directly produce economic benefits of RBM 61 yuan; It could save 13.9% operating costs compared to the traditional process.
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