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焦化废水规模化生物处理过程菌相特征

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焦化废水因成分复杂,难降解有机物较多,其生化处理与深度处理程度制约着行业清洁生产水平.本文以西北地区某焦化厂废水处理为例,阐述了其预处理+二级生物处理+深度处理方法,同时对工艺流程中二级生物处理的微生物特征进行分析,得到以下结论:在门水平上,所有样品中相对丰度最高的是变形菌门(Proteobacteria),承担了废水中降解有机物、脱氮除磷的功能,其大量存在保证了污水处理厂的正常运行;放线菌门(Actinbacteriota)可利用硝酸盐和铵盐,其在B2 中最多,相对丰度为9.93%.在属水平上,厌氧反应器B1 中的假单胞菌属和不动杆菌属最多,可降解大量难降解物质,挥发酚、氰化物和硫化物则在两个好氧反应器中降解效率最高,均大于70%,这可能与其中比例最高的1013-28-CG33_unclassified菌有关.B1 中外源物质生物降解和代谢的代谢通路丰度最大,说明其有机物代谢能力也是最强的.与传统AAO中的微生物菌种相比,因为进水CODCr和氨氮含量过高并含有大量难降解物质,导致GAO菌属较高,PAO菌属略低,反硝化和反硝化除磷菌各有不同程度的增加,整体工艺的有机质降解水平和脱氮效果更好.
Characterization of The Bacteriological Phase of Coke Wastewater Scale Up Biological Treatment Process
Due to its complex composition and high levels of refractory organics,the degree of biochemical treatment and advanced treatment of coking wastewater affects the overall level of clean production.This paper took the wastewater treatment of coking plant in the northwest region as an example to elaborate on its pretreatment,secondary biological treatment,and advanced treatment methods.At the same time,the microbial characteristics of secondary biological treatment in the process flow were analyzed,and the following conclusions were drawn:At the Phylum level,Proteobacteria had the highest relative abundance among all samples,responsible for the degradation of organic matter,nitrogen and phosphorus removal in wastewater.Its large presence ensured the normal operation of wastewater treatment plants;Actinbacteriota can utilize nitrate and ammonium salts,which were the most abundant in B2,with a relative abundance of 9.93%.At the Genus level,Pseudomonas and Acinetobacter were the most abundant in anaerobic reactor B1,which can degrade a large number of refractory substances.Volatile phenol,cyanide and sulfide had the highest degradation efficiency of more than 70%in the two aerobic reactors,which may be related to the highest proportion of 1013-28-CG33_Unclassified bacteria.B1 had the highest abundance of metabolic pathways for the biodegradation and metabolism of exogenous substances,indicating its strongest ability to metabolize organic matter.Compared with the microbial strains in the traditional AAO for domestic sewage treatment,the secondary biological treatment system for coking wastewater treatment had higher CODCr and ammonia nitrogen content in the influent and contained a large number of refractory substances,resulting in higher GAO bacteria,slightly lower PAO bacteria,increased denitrification and denitrification phosphorus removal bacteria,it had better organic matter degradation level and nitrogen removal effect of the overall process.

coking wastewaterbiological treatmentsecondary aerobicdeep treatmentmicrobiological analysis

李明军、陈辉洋

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濮阳德恒水务有限公司,河南 濮阳 457000

上海中耀环保实业有限公司,上海 200092

焦化废水 生物处理 二级好氧 深度处理 微生物分析

2024

广东化工
广东省石油化工研究院

广东化工

影响因子:0.288
ISSN:1007-1865
年,卷(期):2024.51(3)
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