DO对两级AO型MBR工艺处理填埋污泥脱水液的影响  

Effect of DO concentration on the operational performance of the two-stage AOMBR system for landfill sludge dewatering fluid treatment

作　　者：龚晓露 林莉峰 安莹 郗家福 马子航 王建桥 曹晶 周振 GONG Xiaolu;LIN Lifeng;AN Ying;XI Jiafu;MA Zihang;WANG Jianqiao;CAO Jing;ZHOU Zhen(Shanghai Municipal Engineering Design Institute(Group)Co.,Ltd,Shanghai 200092;College of Environmental and Chemical Engineering,Shanghai University of Electric Power,Shanghai 200090)

机构地区：[1]上海市政工程设计研究总院(集团)有限公司,上海200092 [2]上海电力大学环境与化学工程学院,上海200090

出　　处：《环境科学学报》2023年第4期308-315,共8页Acta Scientiae Circumstantiae

基　　金：国家自然科学基金资助项目(No.51878403)。

摘　　要：构建不同DO水平的两级AO型MBR工艺,考察其对填埋污泥脱水液的脱氮处理效果,同时采用三维荧光激发-发射矩阵(EEM)结合平行因子分析(PARAFAC)技术(EEM-PARAFAC)和同步荧光光谱探索了溶解性有机物在反应器中的迁移转化规律.结果表明:与低DO(2~3mg·L^(-1))系统相比,高DO(5~6 mg·L^(-1))系统有着更强的脱氮能力和更稳定的短程硝化作用,氨氮、总氮去除率分别高达98.1%±0.2%、97.3%±0.2%.EEM-PARAFAC识别出3种荧光组分,类腐殖酸组分C1、类色氨酸组分C2和类富里酸组分C3;在高DO系统内,类腐殖酸和类富里酸的强度下降程度,以及类色氨酸的强度增加程度均明显高于低DO系统.二维相关光谱的分析进一步表明在不同DO水平下,类富里酸物质均会发生优先降解,但高DO系统中类腐殖酸物质和类蛋白质物质被微生物所降解的效率更高.Two stage anaerobic-oxic membrane bioreactors(AO-MBR)were established to investigate the effect of DO concentration on nitrogen removal from landfill sludge dewatering effluent.Three-dimensional fluorescence excitation-emission matrix-parallel factor analysis(EEM-PARAFAC)and synchronous fluorescence spectroscopy were used to explore the transfer and transformation of dissolved organic matter in the systems.Results showed that the high DO(5~6 mg·L^(-1))system had higher nitrogen removal rate and more stable partial nitrification compared with the low DO(2~3 mg·L^(-1))system.The removal rates of ammonia nitrogen and total nitrogen were 98.1%±0.2%and 97.3%±0.2%,respectively.Three fluorescent components were identified by EEM-PARAFAC,namely humic acid-like component C1,tryptophan-like component C2 and fulvic acid-like component C3.The fluorescence intensity of humic acid-like and fulvic acid-like fluorescence decreased more significantly and the fluorescence intensity of tryptophan-like fluorescence increased more significantly in the high DO system than that in the low DO system.Further analysis by two-dimensional correlation spectroscopy showed that fulvic acid-like species were preferentially degraded in both DO conditions.However,microbes in the high DO system had higher degradation efficiency for humus-like and protein-like substances.

关 键 词：填埋污泥 污泥脱水液 溶解氧 脱氮 溶解性有机物 

分 类 号：X703[环境科学与工程—环境工程]