摘要
采用共沉淀法制备出一种镧铁负载给水厂污泥复合材料(LaFe-DWTR),研究其在完全混合式反应器(CSTR)中对模拟废水和城市污水处理厂二沉池出水的除磷效果以及水力停留时间(HRT)、LaFe-DWTR投加量和水力学条件的影响。结果表明,当CSTR进水PO_(4)^(3-)-P质量浓度为50 mg·L^(−1),HRT为3 h,LaFe-DWTR投加量为2 g·L^(−1),反应区采用搅拌时,LaFe-DWTR对PO_(4)^(3-)-P的去除率稳定在99%以上,吸附量可达24.82 mg·g^(−1)。对于CSTR进水初始PO_(4)^(3-)-P质量浓度为2 mg·L^(−1)的城市污水处理厂二沉池出水,在3 h HRT,0.14 g·L^(−1)投加量时,CSTR出水的PO_(4)^(3-)-P质量浓度稳定在0.2 mg·L^(−1)左右,已达到《城市污水处理厂污染物排放标准》(GB 18918–2002)一级A标准的要求。
A lanthanum/iron-loaded drinking water treatment residues(LaFe-DWTR)composite material was prepared by the co-precipitation method,and its performance on phosphorus removal from the simulated wastewater and the secondary effluent of municipal wastewater treatment plant(WWTP)in a continuous stirred tank reactor(CSTR)was studied.The effects of hydraulic retention time(HRT),LaFe-DWTR dosage and hydraulic conditions on PO_(4)^(3-)-P removal were also discussed.The results indicated that PO_(4)^(3-)-P removal efficiency in the CSTR with stirring at the reaction zone was over 99%,and the corresponding adsorption capacity of LaFe-DWTR toward PO_(4)^(3-)-P reached 24.82 mg·g^(−1) at the initial PO_(4)^(3-)-P concentration of 50 mg·L^(−1),HRT of 3 h and LaFe-DWTR dosage of 2 g·L^(−1).For the secondary effluent of municipal WWTP with an initial PO_(4)^(3-)-P concentration of 2 mg·L^(−1) as the influent of CSTR,when the HRT was 3 h and LaFe-DWTR dosage was 0.14 g·L^(−1),the concentration of PO_(4)^(3-)-P in CSTR effluent stably maintained about 0.2 mg·L^(−1),which could meet the requirements of the Class A Standard of the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant(GB 18918-2002).
作者
刘文芬
王毅力
刘晨阳
李小林
仝瑶
周妍卿
LIU Wenfen;WANG Yili;LIU Chenyang;LI Xiaolin;TONG Yao;ZHOU Yanqing(Beijing Key Lab for Source Control Technology of Water Pollution,College of Environmental Science and Engineering,Beijing Forestry University,Beijing 100083,China;The China ENFI Engineering Co.Ltd.,Beijing 100083,China)
出处
《环境工程学报》
CAS
CSCD
北大核心
2022年第5期1451-1458,共8页
Chinese Journal of Environmental Engineering
基金
北京市科技计划课题项目(Z181100005518007)
国家重点研发计划项目(2017YFC0505303)。
关键词
镧铁负载
给水厂污泥
磷吸附
动态
完全混合式反应器
lanthanum/iron loading
drinking water treatment residues
phosphorus adsorption
dynamic
CSTR
