3种一体式臭氧-BAF工艺对石化废水生化出水有机物去除特性比较研究  

Comparison study of organics removal characteristics by three kinds of integrated ozone-BAF processes treating biochemical effluent of petrochemical wastewater

作　　者：付丽亚[1,2,3] 吴昌永 周鉴[4] 罗晋 左剑恶 周岳溪 FU Liya;WU Changyong;ZHOU Jian;LUO Jin;ZUO Jian’e;ZHOU Yuexi(State Key Laboratory of Environmental Criteria and Risk Assessment,Chinese Research Academy of Environmental Sciences;Research Center of Environmental Pollution Control Engineering Technology,Chinese Research Academy of Environmental Sciences;School of Environment,Tsinghua University;Jilin Petrochemical Wastewater Treatment Plant,PetroChina Jilin Petrochemical Company;Beijing Enterprises Water Group(China)Investment Co.,Ltd.)

机构地区：[1]环境基准与风险评估国家重点实验室,中国环境科学研究院 [2]中囯环境科学研究院环境污染控制工程技术研究中心 [3]清华大学环境学院 [4]中国石油吉林石化污水处理厂 [5]北控水务(中国)投资有限公司

出　　处：《环境工程技术学报》2021年第1期135-143,共9页Journal of Environmental Engineering Technology

基　　金：国家水体污染控制与治理科技重大专项(2012ZX07201-005,2017ZX07402-002)。

摘　　要：一体式臭氧-曝气生物滤池(biological aerated filter,BAF)是工业废水臭氧氧化深度处理节能降耗的潜在工艺,但臭氧氧化方式对该组合工艺处理效果的影响目前鲜见报道。研究了单独臭氧、臭氧/双氧水和臭氧/催化剂3种臭氧氧化方式下一体式臭氧-BAF工艺对石化废水生化出水有机物的处理效果,并结合出水有机物分子量分布和三维荧光区域积分变化及BAF微生物形貌、生物量和生物活性等,分析有机物去除特性。结果表明:单独臭氧方式下,优化臭氧投加量为5 mg/L,出水平均COD为55.7 mg/L;臭氧/双氧水方式下,出水COD会有一定程度积累;臭氧/催化剂方式下,优化臭氧投加量为5 mg/L时,出水平均COD为39.5 mg/L,去除率为39.9%,出水COD能稳定达标(GB 31571—2015《石油化学工业污染物排放标准》)。单独臭氧方式下,出水中分子量≤1300 Da和3000~6000 Da的有机物增加,生物量降低68.3%;臭氧/双氧水方式下,出水中分子量≤800 Da的有机物增加,生物量降低60%以上;臭氧/催化剂方式出水大部分分子量范围的有机物都能被去除,生物量削减48.3%,且生物活性提高106.4%,溶解性微生物代谢副产物和类腐殖酸等降解优势明显。The integrated ozone-biological aerated filter(BAF)is a potential energy-saving process for advanced treatment of industrial wastewater treatment by ozonation.However,there were few reports on the influences of the ozonation technology on the treatment effects of integrated ozone-BAF.The treatment effect of integrated ozone-BAF process on the biochemical effluent of petrochemical wastewater was studied under three kinds of ozonation methods:ozone alone,ozone/H2O2 and ozone/catalyst.Molecular weight distribution of effluent organic matter,three-dimensional fluorescence regional integration change,BAF microbial morphology,biomass and biological activity were helped to explore the removal characteristics of organic matter.The results showed that the average chemical oxygen demand(COD)was 55.7 mg/L at the optimal ozone dosage of 5 mg/L in single ozone-BAF technology.COD accumulated to a certain extent by the ozone/H2O2-BAF technology.The average COD achieved to 39.5 mg/L(removal rate was 39.9%)at the optimal ozone dosage of 5 mg/L in ozone/catalyst-BAF technology,and effluent COD could meet Emission Standard of Pollutants for Petroleum Chemistry Industry(GB 31571-2015)stably.In single ozone-BAF technology,organics with molecular weight≤1300 Da and 3000-6000 Da increased,the biomass decreased by 68.3%.In ozone/H2O2-BAF technology,organics with molecular weight≤800 Da increased,and the biomass decreased by over 60.0%.In the ozone/catalyst-BAF technology,almost the organics with whole range of molecular weight were removed,the biomass reduced by 48.3%,and the bioactivity increased by 106.4%.Soluble microbial by-products and humic acids were removed significantly by the ozone/catalyst-BAF technology.

关 键 词：石化废水 臭氧 催化剂 曝气生物滤池(BAF) 深度处理 排阻色谱 荧光光谱 

分 类 号：X703.1[环境科学与工程—环境工程]