轻工学报2024，Vol.39Issue(1)：118-126,9.DOI:10.12187/2024.01.015
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
摘要
Abstract
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),NH4+-N,NO2--N,NO3--N,PO43--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 Planctomy-cetota.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 phos-phorus 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Key words
salinity/food industry wastewater/denitrification and phosphorus removal/extracellular polymeric substance/function microbial分类
资源环境引用本文复制引用
钮劲涛,邓伟玲,杜静雨,古家宇,周贤明,陈鑫,吉建涛,金宝丹..含盐食品工业废水脱氮除磷性能研究[J].轻工学报,2024,39(1):118-126,9.基金项目
国家自然科学基金青年科学基金资助项目(42007340) （42007340）
