微氧水解酸化对石化废水可生化性的改善  

Micro‑oxygen Hydrolysis Acidification for Improving Biodegradability of Petrochemical Wastewater

作　　者：袁维波 赵维鑫 刘燕萍 尤佳 殷实磊 魏亮亮 YUAN Wei‑bo;ZHAO Wei‑xin;LIU Yan‑ping;YOU Jia;YIN Shi‑lei;WEI Liang‑liang(Tongfang Water Group Company Limited,Nanjing 210046,China;School of Environment,Harbin Institute of Technology,Harbin 150090,China)

机构地区：[1]同方水务集团有限公司,江苏南京210046 [2]哈尔滨工业大学环境学院,黑龙江哈尔滨150090

出　　处：《中国给水排水》2024年第11期109-114,共6页China Water & Wastewater

基　　金：国家自然科学基金资助面上项目(51878213);黑龙江省自然科学基金资助项目(YQ2020E022)。

摘　　要：为研究微氧水解酸化预处理改善石化废水可生化性的效果,以某化工园区综合废水为研究对象,通过设置不同曝气强度,探索微氧水解酸化预处理工艺参数对化工废水COD、BOD5、B/C、VFA、UV254等指标的影响,并结合反应器内微生物群落分布、溶解性有机物特性等指标,对微氧水解预处理下石化废水生化降解性改善的机制进行深入分析。结果表明,微氧曝气可有效促进石化废水的水解酸化,当曝气量为0.2 L/h时石化废水B/C提高0.07,相比于厌氧水解,在微氧水解过程中COD去除率提高了20.62%。三维荧光光谱显示,随着微氧曝气的进行,难生物降解物质逐渐被降解为多糖类可生物降解有机物。高通量测序结果表明,微氧曝气可以提高水解酸化菌群中变形菌门(Proteobacteria)和放线菌门(Actinobacteria)所占比例,进而改善水解酸化预处理效果。This paper investigated the impact of micro-oxygen hydrolysis acidification pretreatment parameters on COD,BOD5,B/C,VFAs,UV254 and other indicators of chemical wastewater from a chemical industry park by setting different aeration intensities,and analyzed the mechanism of micro-oxygen hydrolysis pretreatment for enhancing the petrochemical wastewater biochemical degradability through the composition of the microbial community and the properties of dissolved organic matters in the reactor,so as to enhance the pre‑treatment efficiency of the petrochemical wastewater.The micro‑oxygen aeration effectively enhanced the hydrolysis acidification of petrochemical wastewater.At an aeration rate of 0.2 L/h,the B/C ratio of petrochemical wastewater increased by 0.07.Compared to anaerobic hydrolysis,the COD removal rate of petrochemical wastewater in micro‑oxygen hydrolysis process was increased by 20.62%.The three‑dimensional fluorescence spectra revealed that the recalcitrant substances gradually degraded into polysaccharide‑like substances as micro‑oxygen aeration progressed.The high‑throughput sequencing results demonstrated that micro‑oxygen aeration enhanced the abundance of Proteobacteria and Actinobacteria in hydrolyzing acidification bacteria,thereby improving the pretreatment efficiency of hydrolysis acidification.

关 键 词：石化废水 微氧水解酸化 可生化性 挥发性脂肪酸 

分 类 号：TU992[建筑科学—市政工程]