盐离子的使用对工业污泥消化率和脱水性能的影响研究  

Study on the effect of salt ion use on the digestibility and dewatering performance of industrial sludge

作　　者：孙贝丽 张路路 吴乐兰 闫洛菲 张景茹 SUN Bei-li;ZHANG Lu-lu;WU Le-lan;YAN Luo-fei;ZHANG Jing-ru(Guangdong Academy of Environmental Sciences,Guangzhou 528000,China)

机构地区：[1]广东省环境科学研究院,广东广州528000

出　　处：《化学工程师》2023年第10期103-106,共4页Chemical Engineer

基　　金：2019年广东省科技创新战略专项项目(No.2019B121205004):“粤港澳环境质量协同创新联合实验室”成果之一。

摘　　要：本研究以某工业污泥为样品,在实验室规模的实验中研究了化学除磷(CPR)对污泥消化率和脱水性能的影响。消化率实验结果表明,在0.1g·L^(-1)剂量的Al^(3+)和Fe^(3+)盐下,剩余活性污泥厌氧消化产生的沼气体积分别减少了21%和36%。这表明,与Fe^(3+)盐相比,Al^(3+)盐对污泥厌氧消化过程中沼气产生的减少作用较小。另外,当金属盐剂量为50mg·L^(-1)时,Al^(3+)和Fe^(3+)分别使一级污泥的脱水率提高了16%和25%,剩余活性污泥的脱水率分别降低了73%和64%。表明在CPR过程中的预沉淀过程中,磷在主槽中被去除,从而提高污泥的脱水能力。In this study,the effects of chemical phosphorus removal(CPR)on the digestibility and dewatering performance of an industrial sludge were studied in a laboratory scale experiment.The results of digestibility test showed that the volume of biogas produced by anaerobic digestion of residual activated sludge was reduced by 21% and 36%,respectively,at 0.1g·L^(-1) dose of Al^(3+)and Fe3+salt.This indicates that Al^(3+)salt has less effect on the reduction of biogas production during sludge anaerobic digestion than Fe^(3+)salt.The experimental results showed that when the metal salt dosage was 50mg·L^(-1),the dewatering rate of primary sludge was increased by 16% and 25% by Al^(3+)and Fe^(3+),and the dewatering rate of residual activated sludge was decreased by 73% and 64%,respectively.Thus,phosphorus was removed in the main tank during the pre-sedimentation process in the CPR,as a result,the dewatering capacity of the sludge would be increased.

关 键 词：盐离子 工业污泥 消化率 脱水性能 

分 类 号：X703[环境科学与工程—环境工程]