摘要
将污水处理厂剩余污泥制成生物炭用于污水深度处理是解决剩余污泥困局和环境污染问题的双赢举措。试验通过比较2种不同污泥基生物炭(I和II)对二级出水中的氮、磷吸附效果,优选出生物炭I,当投加质量为6 g,吸附时间为36 h时,污水中的总氮、总磷和COD质量浓度分别能降低到5,0.3和20 mg/L以下。采用HCl+FeCl_3方式改性生物炭I取得较好效果,当投加质量为8 g时,对硝酸氮、氨氮及总磷的去除率分别达到了78.3%±1.9%,22.4%±1.3%和57.8%±1.6%,相比于未改性的生物炭I分别提高了3.9%,12%和42.4%。试验研究结果显示污泥基生物炭是一种有效、廉价的吸附材料,可用于二级出水的深度净化。
Using waste activated sludge to manufacture biochar for advanced treatment of wastewater is a win-win solution to address the issues of waste activated sludge and environmental pollution.In this paper,the adsorption performance of nitrogen and phosphorus from secondary effluent of two different sludge based biochar(biochar I and biochar II)was compared.Biochar I presented better adsorption performance of nitrogen and phosphorus,concentrations of total nitrogen,total phosphorus and COD were below to 5,0.3 and 20 mg/L,respectively.HCl+FeCl3 was the preferable modification method to improve adsorption performance of biochar I in removing nitrogen and phosphorus from wastewater,nitrate,ammonia nitrogen and total phosphorus removal efficiencies were 78.3±1.9%,22.4±1.3%and 57.8±1.6%,respectively,which were 3.9%,12%and 42.4%higher than that before modification.This work illuminated that the sludge based biochar was an effective,cost-efficient and easy-to-get adsorption material,which demonstrated potential application for advanced treatment of secondary effluent.
作者
邓延慧
崔敏华
陈昊
金秋
刘和
DENG Yan-hui;CUI Min-hua;CHEN Hao;JIN Qiu;LIU He(Jiangsu Provincial Academy of Environmental Science,Nanjing 210036,China;Jiangsu Key Laboratory of Anaerobic Biotechnology,School of Environmental and Civil Engineering,Jiangnan University,Wuxi 214122,China)
出处
《环境科技》
2020年第4期18-23,共6页
Environmental Science and Technology
基金
江苏省太湖水环境综合治理科研课题项目(JSZC-G2016-345)。
关键词
污泥基生物炭
吸附
氮磷
改性
Sludge based biochar
Adsorption
Nitrogen and phosphorus
Modification
作者简介
邓延慧(1966-),女,江苏南京人,本科,高级工程师,主要从事环境科研、环境监测、危废鉴别、固废资源化工程等工作;通讯作者:刘和,教授,E-mail:605543876@qq.com.
