Treatment of mature landfill leachate by a continuous modular internal micro-electrolysis Fenton reactor

Ying, Deng; Xu, Xinyan; Chen, Yang; Wang, Yalin; Jia, Jinping

doi:10.1007/s11164-012-0796-2

Cited by 13 publications

(1 citation statement)

References 28 publications

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“…Fe 2+ is an effective reducing reagent and can also be an inspiring reagent for Fenton reaction to generate reactive hydroxyl radicals (·OH) via reaction (2). The IME system with the in situ addition of H 2 O 2 was previously named as IME-Fenton or ZVI-Fenton process, [27,28] in which microcosmic regions of reduction and oxidation coexist. As a result, the IME-Fenton process promotes the removal of more types of contaminants…”

Section: Effect Of Initial Ph On System Performancementioning

confidence: 99%

Treatment of nanofiltration concentrates of mature landfill leachate by a coupled process of coagulation and internal micro-electrolysis adding hydrogen peroxide

Huang

Chen

Xie

et al. 2014

Environmental Technology

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In this study, a coupled process of coagulation and aerated internal micro-electrolysis (IME) with the in situ addition of hydrogen peroxide (H2O2) was investigated for the treatment of nanofiltration (NF) concentrate from mature landfill leachate. The acceptable operating conditions were determined as follows: initial pH 4, polymeric aluminium chloride dosage of 525 mg-Al2O3/L in the coagulation process, H2O2 dosage of 0.75 mM and an hydraulic retention time of 2 h in an aerated IME reactor. As a result, the removal efficiencies for chemical oxygen demand (COD), total organic carbon, UV254 and colour were 79.2%, 79.6%, 81.8% and 90.8%, respectively. In addition, the ratio of biochemical oxygen demand (BOD5)/COD in the final effluent increased from 0.03 to 0.31, and that of E2/E4 from 12.4 to 38.5, respectively. The results indicate that the combined process is an effective and economical way to remove organic matters and to improve the biodegradability of the NF concentrate. Coagulation process reduces the adverse impact of high-molecular-weight organic matters such as humic acids, on the aerated IME process. A proper addition of H2O2 in the aerated IME can promote the corrosion of solid iron (Fe2+/Fe3+) and cause a likely domino effect in the enhancement of removal efficiencies.

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Section: Effect Of Initial Ph On System Performancementioning

confidence: 99%