Enhanced biological phosphorus removal using thermal alkaline hydrolyzed municipal wastewater biosolids

作     者：Masuduz Zaman Mingu Kim George Nakhla Ajay Singh Fenghua Yang 

作者机构：Department of Chemical and Biochemical EngineeringWestern UniversityLondonONCanada Department of Civil and Environmental EngineeringWestern UniversityLondonONCanada Lystek International Inc.CambridgeONCanada Metropolitan Water Reclamation District of Greater ChicagoChicagoUSA 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2019年第31卷第12期

页      面：164-174页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

基　　金：financial support from the Natural Sciences and Engineering Research Council of Canada 

主　　题：Alternative carbon source Biological nutrient removal Organic resource recovery Biosolids application Phosphorus accumulating organisms 

摘      要：This study reports the feasibility of using municipal wastewater biosolids as an alternative carbon source for biological phosphorus removal.The biosolids were treated by a lowtemperature,thermal alkaline hydrolysis process patented by Lystek International Inc.(Cambridge,ON,Canada)to produce short-chain volatile fatty acids and other readily biodegradable organics.Two sequencing batch reactors(SBRs)were operated with synthetic volatile fatty acids(Syn VFA)and readily biodegradable organics produced from the alkaline hydrolysis of municipal wastewater biosolids(Lystek)as the carbon source,respectively.Municipal wastewaters with different strengths and COD:N:P ratios were tested in the study.The reactors’performances were compared with respect to nitrogen and phosphorus removal.It was observed that phosphorus removal efficiencies were between 98%–99%and 90%–97%and nitrogen removal efficiencies were 78%–81%,and 67%for the Syn VFA and Lystek,respectively.However,the kinetics for phosphorus release and uptake during the anaerobic and aerobic stages with Lystek were observed to be significantly lower than Syn VFA due to the presence of higher order VFAs(C4 and above)and other fermentable organics in the Lystek.