环境工程学报2024，Vol.18Issue(1)：32-40,9.DOI:10.12030/j.cjee.202307113
某污水处理厂CAST工艺的脱氮性能评价
Evaluation of nitrogen removal performance of the CAST process in a wastewater treatment plant
摘要
Abstract
The nitrogen removal performance of CAST process in a wastewater treatment was evaluated by measuring the nitrogen components and suspended solids in the selective,anoxic and aerobic tanks,combined with the simultaneous nitrification and denitrification(SND)rate and feast-famine batch tests.The results showed that the contribution to total nitrogen(TN)removal through SND in aerobic tank and endogenous denitrification at sedimentation stage were dominated,which were(35.50±4.15)％and(62.86±4.13)％,respectively,while the denitrification in anoxic tank only accounted for(1.64±0.05)％.The Dissolved oxygen(DO)concentration had a great influence on the nitrogen removal performance of CAST process.The best nitrogen removal effect happened when the DO concentration in aerobic pool was controlled at 1～1.5 mg·L-1,and the TN removal rate of CAST process could reach 84.51％.The Feast-Famine batch tests proved that the maximum absorption of HAc occurred at the famine duration of 36 h,being up to 0.173 g HAc per 1 g VSS consumption.Based on this result,the optimal reflux ratio could be estimated to be 45％.关键词
CAST工艺/脱氮/同步硝化-反硝化/内源反硝化/饱食-饥饿Key words
CAST/nitrogen removal/simultaneous nitrification and denitrification/endogenous denitrification/feast-famine分类
资源环境引用本文复制引用
王恒信,王娜,秦凯凯,吕恺,彭党聪..某污水处理厂CAST工艺的脱氮性能评价[J].环境工程学报,2024,18(1):32-40,9.基金项目
陕西省2019年重点研发计划(2019ZDLSF06-05) （2019ZDLSF06-05）
