市政污水曝气沉砂池定点吸砂方式同步除砂和除臭性能研究  

Study on the synchronous degritting and deodorization performance of fixedpoint sand suction in aerated grit chamber of municipal sewage treatment plant

作　　者：赵珊[1,2,3] 彭浩 袁星 常江[1,2,3] 王佳伟 ZHAO Shan;PENG Hao;YUAN Xing;CHANG Jiang;WANG Jiawei(Beijing Drainage Group Co.,Ltd,Beijing 100124,China;Beijing Drainage Technology Co.,Ltd,Beijing 100124,China;Beijing Engineering Research Center of Wastewater Resource,Beijing 100124,China)

机构地区：[1]北京城市排水集团有限责任公司,北京100124 [2]北京北排科技有限公司,北京100124 [3]北京市污水资源化工程技术研究中心,北京100124

出　　处：《环境工程学报》2024年第7期2048-2054,共7页Chinese Journal of Environmental Engineering

摘　　要：市政污水曝气沉砂池排砂机(行车)的往复运行可引起出砂量少和臭气释放两方面问题,急需解决方案。开展定点气提吸砂代替排砂机(行车)、固定除臭封闭罩代替随动封闭罩的研究,先利用数学模拟方法开展气提吸砂设备间隔距离和封闭罩密封性研究,得出最优的模拟结果为气提吸砂设备间隔距离3 m、密封罩缝隙率小于1%。然后在华北地区某市政污水处理厂开展验证实验。结果表明,沉砂池出砂量提升至0.0313 L·m^(-3)(提升67%),达到给水排水设计标准要求;沉砂池所在室内臭气浓度为16.5(降低99.5%),氨质量浓度为0.059 mg·m^(-3)(降低69.6%),硫化氢质量浓度低于检出限(降低100%),达到《DB11/2007—2022》要求,实现同步除砂除臭目标。本研究为市政污水处理厂曝气沉砂池优化改造提供有益的借鉴。The reciprocating operation of the sand discharging machine in the municipal sewage aerated sand settling tank cause two problems:less sand output and odor release.To solve these problems,the performance of the alternative solutions was investigated.The sand removal was carried out by a fixed-point air sand suction and the follow-up movable sealing was replaced by a fixed deodorization sealing.The mathematical simulation method was used to evaluate the distance between air sand suction equipment and sealing property.The optimal simulation results were obtained as follows:the interval distance of the air lift components was 3 m,and the gap rate of the fixed seal was less than 1%.Then,a validation experiment was carried out in a municipal sewage treatment plant in North China.The results showed that the sand production capacity of the aeration grit chamber was increased to 0.0313 L·m-3(increased 67%),met the requirements of Water Supply and Drainage Design Manual,and the odor concentration in the room of aeration grit chamber was 16.5(reduced by 98%),the ammonia mass concentration was 0.059 mg·m-3(reduced by 63%),and the hydrogen sulfide mass concentration was below the detection limit(reduce by nearly 100%),met the requirements of DB11/2007-2022.The proposed optimal transformation design could achieve the target of synchronous degritting and deodorization.This study provides useful reference for the optimization and transformation of aeration grit chamber in municipal sewage treatment plants.

关 键 词：市政污水 曝气沉砂池 定点吸砂 恶臭 

分 类 号：X512[环境科学与工程—环境工程]