四川环境2024，Vol.43Issue(4)：150-156,7.DOI:10.14034/j.cnki.schj.2024.04.020
低溶解氧MBR工艺脱氮除磷效率及碳排放特征研究
Research on Nitrogen and Phosphorus Removal Efficiency and Carbon Emission Characteristics of MBR Process with Low DO Condition
文亚萍 1徐婧 1张轩 2雍晓蕾 1郭瑜 2柳文丽1
作者信息
- 1. 成都市排水有限责任公司,成都 610011
- 2. 成都市兴蓉环境股份有限公司,成都 610011
- 折叠
摘要
Abstract
To enhance the efficiency of nitrogen and phosphorus removal and promote the green and low-carbon development,based on the W wastewater treatment plant,the path to reduce the energy consumption and carbon emission intensity of membrane bioreactor(MBR)treatment of domestic wastewater was studied,and the impact of low dissolved oxygen on nitrogen and phosphorus removal was analyzed.The mechanism analysis was conducted in combination with microbial characteristics,and the carbon emission intensity was calculated.The results showed that by dynamically adjusting the dissolved oxygen(DO)in the aerobic zone,maintaining the DO concentration at about 0.5 mg/L and synchronously adjusting the reflux ratio,the effluent quality can reach the local standard stably,and the removal efficiency of TN and TP increased by about 10％and 8％,respectively.The main reason was that the ORP in the anaerobic zone was lower under low DO,and phosphorus release was more sufficient.At the same time,the proportion of denitrifying phosphorus removal bacteria was increased,and the denitrifying phosphorus removal effect was significantly enhanced under this condition.The carbon emission intensity calculation showed that under the low DO,the total carbon,direct carbon and indirect carbon emission intensity decreased by 0.342 kgCO2/m3,0.031 kgCO2/m3 and 0.373 kgCO2/m3,respectively.The increase of direct carbon emission intensity was mainly due to the better and more stable outflow quality,and the increase of direct emissions of N2O.The contribution of the reduction of carbon emission intensity was mainly from the reduction of power consumption in the process of indirect carbon emission.关键词
污水处理厂/MBR工艺/低溶解氧/脱氮除磷/碳排放强度Key words
Sewage treatment plant/MBR process/low DO/nitrogen and phosphorus removal/carbon emission分类
资源环境引用本文复制引用
文亚萍,徐婧,张轩,雍晓蕾,郭瑜,柳文丽..低溶解氧MBR工艺脱氮除磷效率及碳排放特征研究[J].四川环境,2024,43(4):150-156,7.
