摘要
剩余污泥中的磷是一种重要的可再利用的资源,为解决剩余污泥中磷的释放这一技术难题,利用自主研制的方形内循环臭氧流化床装置,探索对剩余污泥中磷释放的控制因素,揭示磷的释放机制.结果表明,在进气质量浓度3.0 g·L^(-1),pH 9.1,运行时间1.0 h时,磷的释放逐渐稳定,总磷的释放质量达到约6.9 g/L剩余污泥(含固率5%),占污泥中磷的质量分数的77.5%,其中无机磷质量占41.1%.通过沉积物磷形态分析方法(SMT)解析各形态磷的分布特性,发现释放的磷组分主要是无机磷形式,以磷灰石成分为主.有机磷的释放质量浓度呈现先增多后减少,同时剩余污泥中各形态的氮也释放出来.臭氧流化床装置可为剩余污泥中磷的释放提供一种新的方法.
Phosphorus in the residual sludge is an important reusable resource.In order to solve the technical problem of phosphorus release from the residual sludge,a self-developed square internal circulation ozone fluidized bed unit was used to explore the controlling factors of phosphorus release from the residual sludge and reveal the release mechanism of phosphorus.The results showed that when the intake concentration was 3.0 g·L^(-1),pH 9.1,and the operating time was 1.0 h,the release of phosphorus gradually stabilized,and the release mass of total phosphorus reached about 6.9 g/L of residual sludge(containing 5%solids),accounting for 77.5%of the mass fraction of phosphorus in the sludge,of which the mass of inorganic phosphorus accounted for 41.1%.The phosphorus speciation analysis method(SMT)was used to analyze the distribution characteristics of all forms of phosphorus,and it was found that the phosphorus released was mainly in the form of inorganic phosphorus,mainly in the form of apatite.The release mass concentration of organophosphorus increased first and then decreased,and all forms of nitrogen in the residual sludge were also released.The ozone fluidized bed unit can provide a new method for phosphorus release from residual sludge.
作者
郭琇
黄煜铎
郑浩钿
林冲
GOU Xiu;HUANG Yuduo;ZHENG Haotian;LIN Chong(College of Urban and Rural Construction, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China)
出处
《仲恺农业工程学院学报》
CAS
2021年第2期39-44,共6页
Journal of Zhongkai University of Agriculture and Engineering
基金
广东省大学生创新创业训练计划项目(201611347031)和(S201911347018)资助.
关键词
内循环臭氧流化床
剩余污泥
磷形态
释放
Internal circulation ozone fluidized bed
Residual sludge
Phosphorus form
Release
