Modified corn-core powder for enhancing sludge dewaterability:Synthesis,characterization and sludge dewatering performance  

作　　者：Zhiying Guo Liping Ma I Quxiu Dai Xinbo Yang Ran Ao Jie Yang Jing Yang Wengang Li 

机构地区：[1]Faculty of Environmental Science and Engineering,Kunming University of Science and Technology,Kunming 650500,China [2]Yunnan Tianlang Energy Saving&Environmental Protection Group Co.Ltd,Kunming 650300,China [3]College of Resources and Environment,Chengdu University of Information Technology,Chengdu 610225,China [4]School of Environmental and Municipal Engineering,Xi'an University of Architecture and Technology,Xi'an 710000,China

出　　处：《Chinese Journal of Chemical Engineering》2021年第4期368-377,共10页中国化学工程学报（英文版）

基　　金：the National Natural Science Foundation of China(No.21666016);the National Key R&D Program of China(2018YFC1900200);and the Key Laboratory and the Analysis and Testing Foundation of Kunming University of Science and Technology(2017M20162207011,2019P20183107007).

摘　　要：The high water content of sludge has always posed significant challenges for its treatment.Synthetic flocculants,which are widely used in sewage treatment plants,can cause secondary pollution during their production and use.Thus,natural polymer flocculants made of natural materials have received increased research attention recently.Corncore,an agricultural waste,was modified through alkalization with sodium hydroxide(NaOH)and etherification with cetyltrimethylammonium bromide(CTMAB)in this study.The L16(45)orthogonal array was used to study the modification conditions.The moisture content(MC)of treated sludge was reduced by approximately 37%with the addition of modified corncore powder(MCCP),which was synthesized under optimal conditions.In addition,changes in the functional groups of the material before and after modification were determined by FTIR.Thermogravimetric analysis indicated that MCCP was steady at room temperature,moreover,BET analysis showed that MCCP had greater surface area.The microstructures of material before and after modification were examined by scanning electron microscopy,revealing that MCCP had a flakeshaped structure and had an increased area of contact area with sludge particles.MCCP is a dehydrating agent that can enhance sludge dewaterability through charge neutralization and reagglomeration and provide superior economic benefits.

关 键 词：Municipal sludge Corn-core powder POLLUTION POLYMERS Waste treatment 

分 类 号：X703[环境科学与工程—环境工程]