常低温条件下氨氮质量浓度对厌氧消化处理轻工行业废水的影响  

Effect of ammonia nitrogen mass concentration on anaerobic digestion process for treating light industrial wastewater under normal and low temperature

作　　者：张肖静 张涵 董永恩 龚瑶瑶 宋亚丽 张杰 ZHANG Xiaojing;ZHANG Han;DONG Yongen;GONG Yaoyao;SONG Yali;ZHANG Jie(Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration/College of Material and Chemical Engineering,Zhengzhou University of Light Industry,Zhengzhou 450001,China;School of Environment,Harbin Institute of Technology,Harbin 150090,China)

机构地区：[1]郑州轻工业大学环境污染治理与生态修复河南省协同创新中心/材料与化学工程学院,河南郑州450001 [2]哈尔滨工业大学环境学院,黑龙江哈尔滨150090

出　　处：《轻工学报》2024年第1期109-117,共9页Journal of Light Industry

基　　金：中原千人-中原青年拔尖人才支持计划项目(豫组通【2021】44号);国家自然科学基金项目(22006139);河南省自然科学基金项目(232300420171)。

摘　　要：在升流式厌氧污泥床(Up-flow Anaerobic Sludge Blanket, UASB)中启动厌氧消化工艺,考查常低温(<25℃)条件下氨氮质量浓度对厌氧消化处理模拟轻工行业废水性能的影响。结果表明,间歇加泥并控制回流比为7.5的条件有利于厌氧消化工艺的启动,当氨氮质量浓度为400~1400 mg/L时,对厌氧消化性能基本无不利影响,且在400~800 mg/L之间时,会轻微促进厌氧消化性能,但较高的氨氮质量浓度会导致部分微生物死亡,促使胞外聚合物和溶解性微生物产物含量增大。此外,氨氮质量浓度的升高不利于氢营养型产甲烷古菌Methanobacterium的生长,其相对丰度从75.5%降低至6.3%,但有利于乙酸营养型产甲烷古菌Methanosaeta和兼性营养型产甲烷古菌Methanosarcina的增殖,二者的相对丰度分别从19.8%和1.7%增大至63.8%和29.1%。常低温条件下,厌氧消化工艺可以处理氨氮质量浓度为0~1400 mg/L的高COD的轻工行业废水,但优势产甲烷古菌会发生显著演替。Anaerobic digestion process was established in the Up-flow Anaerobic Sludge Blanket(UASB).The study focused on the effect of ammonia nitrogen mass concentration on the performance of anaerobic digestion process for treating light industrial wastewater under normal and low-temperature conditions(<25℃).The results showed that intermitting sludge addition and controlling the reflux ratio of 7.5 were beneficial for the start-up of the anaerobic digestion process.Ammonia nitrogen mass concentration ranging from 400~1400 mg/L had no adverse effect on anaerobic digestion performance,while that in 400~800 mg/L slightly promoted anaerobic digestion performance.However,the higher ammonia nitrogen mass concentration led to the death of some microorganisms and an increase of the extracellular polymeric substance and soluble microbial products.In addition,the increase of ammonia nitrogen mass concentration was not conducive to the growth of hydrogenotrophic Methanobacterium.The relative abundance of Methanobacterium decreased from 75.5%to 6.3%.However,it was beneficial to the proliferation of acetotrophic Methanosaeta and facultative Methanosarcina and their relative abundances increased from 19.8%and 1.7%to 63.8%and 29.1%,respectively.Under normal and low temperature conditions,anaerobic digestion process could treat high COD light industrial wastewater with ammonia nitrogen mass concentration of 0~1400 mg/L,but the dominant methanogenic archaea would undergo significant revolution.

关 键 词：厌氧消化工艺 氨氮 产甲烷古菌 轻工行业废水 

分 类 号：X79[环境科学与工程—环境工程] TS06[轻工技术与工程]