摘要
以处理规模为204 t DS/d的某污泥厌氧消化系统为研究对象,系统分析了运行现状、泥质特性与滤液中溶解性有机物(DOM)的形态。该污泥厌氧消化系统运行良好,2016年的沼气产率为0.77 m^(3)/kg VSS,有机质分解率平均为45.8%。厌氧消化后由于污泥颗粒平均粒径降低,胞外聚合物由内层向外层迁移,造成污泥絮体凝聚性能下降,过滤脱水性能降低。对DOM形态进行分析后发现,厌氧消化系统能够彻底降解类色氨酸类蛋白质,部分降解芳香族类蛋白质,滤液中出现了难降解有机物(类富里酸、类腐殖酸、不饱和双键或芳香类有机物)的累积。
The current process performance,organic matters(DOM)of a sludge anaerobic digesti sludge characteristics,and components of dissolved on(AD)system,with the treatment capacity of 204 tDS/d,were investigated.In 2016,the AD system showed good process performance with biogas yield of 0.77 m^3/kgVSS and degradation efficiency of organic matters of 45.8%.The deterioration of sludge aggregation and dewaterability was observed in the AD system owing to the decrease of sludge particle size and diffusion of extracellular polymeric substances from the inner layer to the outer layer.Analysis on DOM components showed that the AD system could degrade tyrosine-like protein completely and aromatic protein partly,but non-biodegradable organic substances(fulvic,humic and compounds with unsaturated double bonds and benzene ring)were accumulated in filtrate of the AD system.
作者
裘湛
QIU Zhan(Shanghai Chengtou Wastewater Treatment Co.Ltd.,Shanghai 201203,China)
出处
《中国给水排水》
CAS
CSCD
北大核心
2018年第1期31-35,共5页
China Water & Wastewater
关键词
污泥
厌氧消化
脱抽性能
胞外聚合物
溶解性有机物
sludge
anaerobic digestion
dewaterability
extracellular polymeric substance
dissolved organic matter
