ADVANCED TREATMENT OF SOLID WASTE LANDFILL LEACHATE BY A COMBINED PROCESS OF Fe/C MICROELECTROLYSIS-FENTON OXIDATION

LI Qiuhua; WANG Qunhui

doi:10.13205/j.hjgc.202203004

Volume 40 Issue 3

Mar. 2022

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LI Qiuhua, WANG Qunhui. ADVANCED TREATMENT OF SOLID WASTE LANDFILL LEACHATE BY A COMBINED PROCESS OF Fe/C MICROELECTROLYSIS-FENTON OXIDATION[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(3): 18-23. doi: 10.13205/j.hjgc.202203004

Citation:

LI Qiuhua, WANG Qunhui. ADVANCED TREATMENT OF SOLID WASTE LANDFILL LEACHATE BY A COMBINED PROCESS OF Fe/C MICROELECTROLYSIS-FENTON OXIDATION[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(3): 18-23. doi: 10.13205/j.hjgc.202203004

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ADVANCED TREATMENT OF SOLID WASTE LANDFILL LEACHATE BY A COMBINED PROCESS OF Fe/C MICROELECTROLYSIS-FENTON OXIDATION

doi: 10.13205/j.hjgc.202203004

LI Qiuhua^1,2,
WANG Qunhui^{1
,
,}

1. School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2. School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China

Received Date: 2020-07-05
Available Online: 2022-07-07

Abstract

Abstract

The late-stage waste infiltration fluid from the solid waste landfill in Jiangmen was treated by a combined process of Fe/C micro electrolysis-Fenton oxidation, to reduce COD, turbidity value and the concentration of heavy metal ions in the leachate. Results showed that under the condition of pH between 4 and 5, dosage of iron-carbon composite of 30~40 g/L, aeration volume of 40~60 L/min, the hydraulic retention time (HRT) of 1 hour, the removal rate of Ni²⁺, Cr(Ⅵ) and Pb²⁺ in waste leachate was 96%,97% and 96% respectively, the removal rate of the leachate turbidity and COD was 92.41% and 62.33% respectively, the turbidity decreased from 40.73 NTU to 3.09 NTU, and the COD decreased from 579.2 mg/L to 218.16 mg/L. In further Fenton oxidation treatment, research results showed that under the condition of Fe²⁺concentration of 0.007 mol/L, oxidation time of 90 min, n(H₂O₂):n(Fe²⁺)=1.2:1, the removal rate of the COD and turbidity was 67.50% and 53.20% respectively, the value of turbidity was 1.47 NTU, the value of COD was 69.49 mg/L, reaching the Rank Ⅱ limiting value of China's National Standard of Sewage discharge (GB18918-2002).
- Fe/C micro-electrolysis,
- Fenton oxidation,
- heavy metal,
- landfill leachate,
- COD

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References(32)

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