化工厂硫酸再生冷凝液的厌氧可处理性研究  

Feasibility of anaerobic treatment of spent sulphuric acid regeneration condensate in chemical plant

作　　者：白周央 季华 张婧伟 刘佳 杨树成[1] BAI Zhouyang;JI Hua;ZHANG Jingwei;LIU Jia;YANG Shucheng(School of Energy and Power Engineering,Xi’an Jiaotong University,Xi’an 710049,China;Suez Water Treatment Co.,Ltd.,Beijing 100026,China)

机构地区：[1]西安交通大学能源与动力工程学院,陕西西安710049 [2]苏伊士水务工程有限责任公司,北京100026

出　　处：《工业水处理》2021年第12期60-65,共6页Industrial Water Treatment

基　　金：国家自然科学基金项目(51308453);陕西省自然科学基础研究计划项目(2021JM-015);苏伊士水务工程有限责任公司资助项目(20190594,20200353)。

摘　　要：甲基丙烯酸甲酯是一种重要的化工原料,其生产过程产生大量废酸,可用废酸再生(SAR)工艺进行回收。硫酸再生冷凝液是废硫酸再生前浓缩冷凝过程产生的一类废水,其成分与前端生产工艺密切相关。以甲基丙烯酸甲酯生产工艺配套的SAR装置冷凝液为研究对象,其主要成分为甲基丙烯酸甲酯、丙酮和二甲醚,COD高达54000~107800 mg/L,Na^(+)质量浓度超过10000 mg/L。采用间歇实验和上流式厌氧污泥床(UASB)反应器连续处理SAR冷凝液,结果表明该冷凝液具有较好的厌氧可处理性。采用柠檬酸厂厌氧颗粒污泥和原化工厂厌氧絮状污泥启动的UASB反应器经过53 d左右的运行,COD负荷分别达到12.0 kg/(m^(3)·d)和8.0 kg/(m^(3)·d),出水COD分别维持在800、600 mg/L以下。Methyl methacrylate is an important chemical material and its production process generates a large amount of waste acid,which can be recovered by spent sulphuric acid regeneration(SAR)process.SAR condensate is originated from concentration and condensation processes of waste sulfuric acid before regeneration.Its composition is closely related to the frontend processes in which sulfuric acid is used.Condensate produced in the SAR system accompanying the synthesis unit of methyl methacrylate was researched.SAR condensate mainly contained methyl methacrylate(MMA),acetone and dimethyl ether,with COD up to 54000-107800 mg/L and Na^(+) mass concentration over 10000 mg/L.Batch experiments and UASB reactor were used to continuously treat SAR condensate,and the results showed that the condensate had good anaerobic treatability.The COD loads of UASB reactors inoculated with anaerobic granular sludge from a citric acid plant and anaerobic flocculent sludge from the chemical plant reached 12.0 kg/(m^(3)·d)and 8.0 kg/(m^(3)·d)after 53 days of operation,and the effluent COD maintained below 800 and 600 mg/L,respectively.

关 键 词：甲基丙烯酸甲酯 废酸再生 冷凝液 厌氧处理 

分 类 号：X703[环境科学与工程—环境工程]