摘要
调研了深圳市L区12座水质净化厂2016—2020年的污泥产率。结果表明:污泥产率(以绝干污泥计)的区间为0.51~2.66 t/万m^(3),5年污泥产率的平均值呈逐年上升趋势。大多数情况下,对污水处理工艺进行“提标改造”可降低污泥产率。进水SS和BOD_(5)与污泥产率呈正相关。出厂污泥含水率影响污泥处理时的药剂投加量,进而影响污泥产率。料仓储存条件会改变出厂污泥的质量,从而影响污泥产率。降低污泥产率可以从优化污水处理系统、提高进水可生化性、减少药剂投加量以及改善料仓储存条件入手,建议采用旁路进水或多点曝气,控制进水中悬浮固体的含量,强化预处理阶段泥沙分离,优化污泥处理时的药剂投加量,以及使用封闭料仓储存及密闭污泥运输等污泥原位减量的措施。
The sludge yield of 12 water purification plants in L District of Shenzhen from 2016 to 2020 was investigated.The results showed that the sludge yield ranged from 0.51 to 2.66 t DS/104 m^(3),and its average value showed an increasing trend.In most cases,upgrading the wastewater treatment process can reduce sludge yield.Influent SS and BOD_(5) were positively correlated with sludge yield.The outward sludge moisture affected the sludge yield by influencing the dosage of chemicals in sludge treatment.Silo storage condition could change the weight of sludge and thus affect the sludge yield.In order to reduce the sludge yield,optimizing the wastewater treatment system,improving the influent biodegradability,reducing the dosage of chemicals and improving the silo storage conditions should be considered.It is suggested to use specific in-situ sludge reduction measures including using bypass inlet or multi-point aeration,controlling inflow suspended solids,strengthening sediment separation in the pretreatment stage,and adopting closed silos and transportation modes.
作者
刘旭辉
高静思
袁佳佳
朱佳
LIU Xuhui;GAO Jingsi;YUAN Jiajia;ZHU Jia(Shenzhen Longgang Drainage Co.,Ltd.,Shenzhen 518000,China;School of Materials and Environmental Engineering,Shenzhen Polytechnic,Shenzhen 518055,China)
出处
《环境工程》
CAS
CSCD
北大核心
2023年第6期181-186,共6页
Environmental Engineering
基金
深圳职业技术学院校级项目-青年创新(科技类)(6022310026K)
深圳职业技术学院校级科研配套项目(6020320003K)
深圳市博士后科研启动项目(6022271006K)
广东省教育厅城市智慧水污染防治技术开发中心(2019GGCZX007)
关键词
污泥产率
污水处理工艺
进水浓度
污泥含水率
储存条件
污泥原位减量
sludge yield
wastewater treatment process
influent concentration
sludge moisture
storage condition
in-situ sludge reduction
