生物吸附/A^(2)O工艺特性及蛋白质源污泥增量研究  

Characteristics of Biosorption and A^(2)O Combined Process and Increment of Protein Source Sludge

作　　者：郑凯凯[1] 支尧 王硕[1,2,3] 张光生 李激[1,2,3] ZHENG Kai-kai;ZHI Yao;WANG Shuo;ZHANG Guang-sheng;LI Ji(School of Environment and Civil Engineering,Jiangnan University,Wuxi 214122,China;Jiangsu Key Laboratory of Anaerobic Biotechnology,Wuxi 214122,China;Jiangsu University Collaborative Innovation Center of Water Treatment Technology and Material,Suzhou 215009,China)

机构地区：[1]江南大学环境与土木工程学院,江苏无锡214122 [2]江苏省厌氧生物技术重点实验室,江苏无锡214122 [3]江苏高校水处理技术与材料协同创新中心,江苏苏州215009

出　　处：《中国给水排水》2022年第15期109-114,共6页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2015ZX07306-001);江苏省重点研发计划(社会发展)科技示范工程(BE2015622)。

摘　　要：为了回收活性污泥中的蛋白质,开展基于生物吸附/A^(2)O组合工艺运行特性与蛋白质源污泥增量潜力研究。结果表明,由于生物吸附段对进水中残留无机颗粒物的截留与颗粒状有机物的吸附作用,导致后续A^(2)O段缺少碳源,TN、TP等水质指标均出现了超标现象,污泥有机质含量及污泥量的增长幅度都较小,进水中氮的同化/异化仅为20%左右。为保证出水水质,同时促进污泥增量,将生物吸附段剩余污泥厌氧发酵产生的优质碳源投加到后续A^(2)O中,改善了该生物段的整体碳源环境,显著提高了微生物活性,获得了高质量的出水水质,其中氨氮、TN和TP分别达到1、3和0.3mg/L以下。污泥的有机质含量及污泥量增长显著,进水中氮的同化/异化达到50%左右,蛋白质含量从341.2 mg/gMLSS提高至406.3 mg/gMLSS,增长率为19.1%。元素分析结果表明,氮元素所占的质量比从接种污泥的4.96%提高至6.71%,进一步证实了污泥中蛋白质含量的显著增加。Operational characteristics and incremental potential of protein source sludge based on biosorption and A^(2)O combined process were investigated to recover proteins from activated sludge.The interception of residual inorganic particles in influent and the adsorption of particulate organic matter in the biological adsorption process led to the subsequent A^(2)O process lack of carbon source and TN,TP and other water quality indicators exceeding the discharge standard.In addition,the increase in organic matter content and sludge quantity was small,and the assimilation/dissimilation of nitrogen in influent was only approximately 20%.The high-quality carbon source generated by anaerobic fermentation of excess sludge in the biosorption process was added to the subsequent A^(2)O treatment process to ensure the quality of effluent and promote the increment of sludge.The overall carbon source utilization of the biological process was improved,the microbial activity was significantly increased,and high-quality effluent quality was obtained,of which ammonia nitrogen,TN and TP were less than 1 mg/L,3 mg/L and 0.3 mg/L,respectively.Organic matter content and sludge quantity increased significantly,the assimilation/disassimilation of nitrogen reached approximately 50%,and the protein content increased from 341.2 mg/gMLSS to 406.3 mg/gMLSS,indicating that a growth rate of 19.1%was achieved.Elemental analysis showed that the mass fraction of nitrogen increased from 4.96%to 6.71%,which further confirmed the significant increase of protein content in the sludge.

关 键 词：生物吸附 氮的同化/异化 污泥有机质含量 蛋白质 

分 类 号：TU992[建筑科学—市政工程]