含盐食品工业废水脱氮除磷性能研究  

Denitrification and phosphorus removal performance of salt-containing food industry wastewater

作　　者：钮劲涛 邓伟玲 杜静雨 古家宇 周贤明 陈鑫 吉建涛 金宝丹 NIU Jintao;DENG Weiling;DU Jingyu;GU Jiayu;ZHOU Xianming;CHEN Xin;JI Jiantao;JIN Baodan(Henan Heng′an Environmental Protection Technology Co.,Ltd.,Zhengzhou 450001,China;College of Material and Chemical Engineering,Zhengzhou University of Light Industry,Zhengzhou 450001,China;School of Ecology and Environment,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]河南恒安环保科技有限公司,河南郑州450001 [2]郑州轻工业大学材料与化学工程学院,河南郑州450001 [3]郑州大学生态与环境学院,河南郑州450001

出　　处：《轻工学报》2024年第1期118-126,共9页Journal of Light Industry

基　　金：国家自然科学基金青年科学基金资助项目(42007340)。

摘　　要：为研究含盐食品工业废水脱氮除磷的性能,将不同盐度(NaCl)引入实验室模拟食品工业废水处理系统中,选择厌氧/缺氧/好氧(A/A/O)的运行方式,考查处理系统中化学需氧量(COD)、NH_(4)^(+)-N、NO_(3)^(-)-N、NO_(2)^(-)-N、PO_(4)^(3-)-P等理化指标的变化情况,并结合污泥性质和功能微生物菌群结构揭示不同盐度对食品工业废水脱氮除磷性能的影响机理。结果表明,引入盐度既能提高系统中有机物的去除效果,COD去除率从84.08%增大至90.33%,还能促进厌氧阶段除磷菌释磷及硝化作用,NH_(4)^(+)-N去除率从95.79%增大至98.85%,但会抑制除磷菌好氧吸磷性能;低盐度(0.5g/L)能够促进系统反硝化性能,但当盐度升高至3.0g/L时,会降低系统反硝化性能;随着盐度的升高,微生物胞外聚合物(EPS)含量增大,当盐度为3.0g/L时,EPS含量为38.81mg/gVSS;引入盐度还会增加微生物菌群的相对丰度,改变微生物菌群结构,促进Chloroflexi、Actinobacteriota和Planctomycetota等反硝化菌门富集,同时随着盐度的升高,Caldilineaceae、Ferruginibacter、Kouleothrix等功能微生物的相对丰度增大,而Candidatus_Competibacter的相对丰度降低,这保证了含盐系统稳定的脱氮除磷效果。In order to study the nitrogen and phosphorus removal performance of salt-containing food industry wastewater,the different doses of salinity were introduced into the food industry wastewater treatment system and the mode of operation was selected as anaerobic/anoxic/aerobic(A/A/O).The variation of different indicators including chemical oxygen demand(COD),NH_(4)^(+)-N,NO_(2)^(-)-N,NO_(3)^(-)-N,PO_(4)^(3-)-P were analyzed,and the influence mechanism about different concentrations of salinity on the nitrogen and phosphorus removal performance for the food industry wastewater was revealed combining with sludge properties and functional microorganisms.The results showed that the introduced salinity not only improved the COD degradation with the value increasing from 84.08%to 90.33%,but also improved phosphorus release of phosphorus removing bacteria and nitrification.The efficiency of NH_(4)^(+)-N increased from 95.79%to 98.85%.However,it restrained the absorption phosphorus of phosphorus removing bacteria in aerobic phase.The denitrification performance was enhanced under low salinity(0.5 g/L)condition,but was decreased when the salinity increased to 3.0 g/L.The extracellular polymeric substance(EPS)increased with salinity and the EPS was 38.81 mg/g volatile suspended solid(VSS)under the 3.0 g/L salinity condition.The introduced salinity increased the relative abundance of microbial community and changed its structure,which enhanced denitrifying bacteria enrichment including Chloroflexi、Actinobacteriota and Planctomycetota.It was also found that salinity increased the abundance of Caldilineaceae、Ferruginibacter and Kouleothrix but restrained the abundance of Candidatus Competibacter.All of them guaranteed the stable nitrogen and phosphorus removal of treatment system.

关 键 词：盐度 食品工业废水 脱氮除磷 胞外聚合物 功能微生物 

分 类 号：X703[环境科学与工程—环境工程] TS201.2[轻工技术与工程—食品科学]