摘要
使用加气混凝土砌块废料处理模拟废水,考察除磷效果及其对出水p H值的影响,并确定其用于强化除磷的最佳投加模式。通过设计L16(4^5)正交试验和控制变量试验,研究了进水pH值、反应时间、加气混凝土投加量和粒径4个因素对除磷及出水pH值的影响。试验结果表明,对除磷效果的影响从大到小依次为:进水pH值>反应时间>粒径>投加量;对出水p H值的影响从大到小依次为进水pH值>粒径>投加量>反应时间。综合考虑经济成本和出水水质,最佳投加模式如下:进水pH值为7. 5~8、反应时间为10 min、加气混凝土投加量为10 g、颗粒粒径为6~8mm,此时加气混凝土对磷的吸附量为0. 051 mg/g,出水水质能够达到《城镇污水处理厂污染物排放标准》(GB 18918—2002)一级A标准。
The wasted blocks of autoclaved aerated concrete (AAC) were used to treat simulated phosphorus wastewater. The phosphorus removal effect and its influence on effluent pH were investigated,and the optimal operation mode in practical application was determined. The influence of influent pH,reaction time,AAC dosage and AAC particle size on phosphorus removal and effluent pH was studied through L16 (4^5) orthogonal test and controlling the variables. The results showed that the order of influence of each variable on phosphorus removal was influent p H > reaction time > AAC particle size >AAC dosage,while the influence on effluent pH was ranked as: influent pH > AAC particle size > AAC dosage > reaction time. Considering the economic cost and removal efficiency,the optimal operation mode was influent pH of 7. 5-8,reaction time of 10 min,AAC dosage of 10 g and AAC particle size of 6-8 mm. Under this mode,the adsorption capacity of phosphorus by AAC was 0. 051 mg/g,and the effluent quality met the first level A criteria specified in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002).
作者
杨子萱
吕锡武
YANG Zi-xuan;Lü Xi-wu(School of Energy and Environment,Southeast University,Nanjing 210096 ,China;ERC Taihu Lake Water Environment < Wuxi > ,Wuxi 214135 ,China)
出处
《中国给水排水》
CAS
CSCD
北大核心
2019年第15期110-116,共7页
China Water & Wastewater
基金
国家水体污染控制与治理科技重大专项(2017ZX07202004)
关键词
加气混凝土
含磷废水
正交试验
PH值
autoclaved aerated concrete(AAC)
phosphorus wastewater
orthogonal test
pH
