高硬度高碱度生活垃圾渗滤液反渗透浓缩液软化处理研究  

Research on Softening Treatment of Reverse Osmosis Concentrate of Domestic Waste Leachate with High Hardness and High Alkalinity

作　　者：方国生 黄兴刚 宋佳 刘亚军 苏星 FANG Guo-sheng;HUANG Xing-gang;SONG Jia;LIU Ya-jun;SU Xing(WELLE Environmental Group Co.,Ltd.,Changzhou 213125,China)

机构地区：[1]维尔利环保科技集团股份有限公司,江苏常州213125

出　　处：《环境科技》2024年第5期14-19,共6页Environmental Science and Technology

基　　金：江苏省科技成果转化专项资金项目(BA2020235)。

摘　　要：生活垃圾焚烧发电厂渗滤液反渗透浓缩液中有机物浓度高、硬度高、成分复杂,深度处理时容易在设备内部结垢并堵塞设备。针对该浓缩液的水质特点,采用“曝气+NaOH”组合的除硬方法,研究曝气和NaOH药剂对渗滤液碱度和硬度去除的主要因素及相关参数。结果表明,最优参数条件为气水比为14∶1,曝气时间为60 min,pH值为7.0,NaOH投加量为5 mg/L;经工程试验验证,总硬度去除率达95%,比传统除硬方法的费用降低64.8%。Domestic waste incineration power plant leachate reverse osmosis concentrate in the high concentration of organic matter,high hardness,complex composition,the depth of the treatment is easy to be scaled in the internal equipment and clogging equipment.In view of the water quality characteristics of the concentrate,the combination of"aeration+NaOH"method of hardness removal is adopted to study the main factors and relevant parameters of aeration and NaOH chemicals on the removal of alkalinity and hardness of leachate.The results show that the optimal parameters of this method are:gas and water ratio of 14∶1,aeration time of 60 min,pH value of 7.0,NaOH dosage of 5 mg/L;verified by the engineering test,the total hardness removal rate reaches 95%,which reduces the cost by 64.8%compared with the traditional hardness removal method.

关 键 词：浓缩液 硬度 软化 曝气 

分 类 号：X7[环境科学与工程—环境工程]