期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 741, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2020.140165
关键词
Wastewater treatment; Industrial land fill leachate; Sequential treatment; Activated sludge; AOPs; EAOPs
资金
- Norte Portugal Regional Operational Programme (NORTE 2020) [NORTE-01-0145-FEDER-000006]
- European Regional Development Fund (ERDF) [UIDB/50020/2020]
- national funds through Fundacao para a Ciencia e a Tecnologia, Portugal, (FCT)/MCTES (PIDDAC)
- [205715/2014-1]
- [CEECIND/01386/2017]
- [CEECIND/01317/2017]
This study focuses on the development of a treatment train for a leachate from a hazardous industrial waste landfill (HIWL) previously treated by: (i) catalytic oxidation with hydrogen peroxide (H2O2) for sulphide and sulphite conversion into oxidized sulphur species, including sulphate, and (ii) chemical precipitation of sulphate as barite. The complete treatment line counted on four more stages: (iii) 1st biological oxidation for removal of biodegradable organic compounds and nitrogen species, (iv) coagulation with ferric chloride (coagulant dose of 100 mg Fe L-1, pH 2.8) for removal of a fraction of recalcitrant organics and suspended solids, (v) photo-Fenton oxidation using ultraviolet A (UVA) radiation (PF-UVA) (pH 2.8, initial total dissolved iron content of 140 mg L-1, treatment time of-4 h) for recalcitrant organics degradation and biodegradability improvement, and (vi) 2nd biological oxidation for removal of the biodegradable organic matter resulting from the PF-UVA process. The use of anodic oxidation or photoelectro-Fenton processes in stage (v) demonstrated to be unfeasible. A chemical oxygen demand (COD) below 1000 mg O-2 L-1, a common limit imposed by municipal wastewater treatment plants (MWWTPs) to effluents discharged into the municipal sewer, was achieved after a feasible treatment time (-4 h) using the multistep approach. The remediation of the HIWL leachate proved to be a big challenge. (c) 2020 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据