Simultaneous Ammonium oxidation denitrifying (SAD) in an innovative three-stage process for energy-efficient mature landfill leachate treatment with external sludge reduction

2020 ◽  
Vol 169 ◽  
pp. 115156 ◽  
Author(s):  
Fangzhai Zhang ◽  
Xiyao Li ◽  
Zhong Wang ◽  
Hao Jiang ◽  
Shang Ren ◽  
...  
Keyword(s):  
Landfill Leachate ◽  
Energy Efficient ◽  
Sludge Reduction ◽  
Ammonium Oxidation ◽  
Leachate Treatment ◽  
Stage Process ◽  
Mature Landfill Leachate

scholarly journals Mature landfill leachate treatment by denitrification and ozonation

2011 ◽  
Vol 46 (1) ◽  
pp. 148-153 ◽  
Author(s):  
Susana Cortez ◽  
Pilar Teixeira ◽  
Rosário Oliveira ◽  
Manuel Mota
Keyword(s):  
Landfill Leachate ◽  
Leachate Treatment ◽  
Mature Landfill Leachate

scholarly journals Ecotoxicological study of landfill leachate treated in the ANAMMOX process

2019 ◽  
Vol 54 (3) ◽  
pp. 230-241 ◽  
Author(s):  
Filip Gamoń ◽  
Mariusz Tomaszewski ◽  
Aleksandra Ziembińska-Buczyńska
Keyword(s):  
Heavy Metals ◽  
Organic Compounds ◽  
Landfill Leachate ◽  
Lemna Minor ◽  
Ammonium Oxidation ◽  
High Concentration ◽  
Leachate Treatment ◽  
Mutagenic Potential ◽  
Industrial Solid Waste ◽  
Anammox Process

Abstract The exacerbated production of solid residues represents a major problem in the management and handling of urban wastes. The by-product of stored municipal and industrial solid waste production is landfill leachate. Leachate is characterized by a high concentration of organic compounds, ammonia, and the presence of heavy metals. Because of its composition, this kind of wastewater can cause serious environmental pollution and should be treated to reduce its toxic effects. Increasingly, the interest is directed to the application of the ANAMMOX (anaerobic ammonium oxidation) process for the landfill leachate treatment. In this study, for the first time, the effect of treatment with the ANAMMOX process on the toxicity of leachate was investigated. Based on the research performed in this study, it could be stated that the untreated landfill leachate from the municipal landfill and the influent of the ANAMMOX reactor present phytotoxicity to Lemna minor, due to a correlation of high concentrations of organic compounds, heavy metals, such as Cd2+, Cu2+, Zn2+, and the presence of an unionized form of ammonia (NH3). The results of the Allium cepa test demonstrated that the treatment was not efficient in eliminating the genotoxic substances that are responsible for the mutagenic potential in the effluent. This article has been made Open Access thanks to the kind support of CAWQ/ACQE (https://www.cawq.ca).

scholarly journals Field-scale performance of microelectrolysis-Fenton oxidation process combined with biological degradation and coagulative precipitation for landfill leachate treatment

2019 ◽  
Vol 118 ◽  
pp. 04017
Author(s):  
Yuan-Yuan Zhao ◽  
You-Ze Xu ◽  
Shuang Zhou ◽  
Jiao-Mei Liu ◽  
Yingxiang Cheng ◽  
...  
Keyword(s):  
Landfill Leachate ◽  
Industrial Application ◽  
Oxidation Process ◽  
Dominant Role ◽  
Full Scale ◽  
Fenton Oxidation ◽  
Biological Degradation ◽  
Leachate Treatment ◽  
Fenton Oxidation Process ◽  
Mature Landfill Leachate

In order to verify the feasibility of Fe/C microelectrolysis-Fenton oxidation for mature landfill leachate treatment in industrial application, this study conducted the treatment processes at full-scale by physicochemical and spectral characterization. The full-scale studies showed that 48.17% of the dissolved organic carbon (DOC) and 42.27% of the dissolved organic nitrogen (DON) were removed by the microelectrolysis-Fenton oxidation process, respectively. Spectra analysis further suggested that the mature leachate was mainly composed of tryptophan-like and fulvic-like compounds. The combination of microelectrolysis and Fenton oxidation efficiently decomposed the aromatic C=C into carboxyl-C and decreased the molecular size of DOC, resulting in a dramatic reduce (97.1%-98.3%) of the fluorescence intensity. The DON removal by microelectrolysis-Fenton oxidation likely associated with the NH2-decomposition of tryptophan-like and aromatic compounds into NO3-N. The tryptophan-like compounds may play a dominant role in Ba binding, while Pb and Cd were likely bound to both the tryptophan-like and fulvic-like compounds. Above 60% of the heavy metals were removed in the microelectrolysis-Fenton oxidation section. Results above confirmed the effectiveness of Fe/C microelectrolysis-Fenton oxidation for mature landfill leachate treatment in industrial application.

scholarly journals Combining Coagulation and Electrocoagulation with UVA-LED Photo-Fenton to Improve the Efficiency and Reduce the Cost of Mature Landfill Leachate Treatment

Molecules ◽  
2021 ◽  
Vol 26 (21) ◽  
pp. 6425
Author(s):  
Javier Tejera ◽  
Daphne Hermosilla ◽  
Antonio Gascó ◽  
Carlos Negro ◽  
Ángeles Blanco
Keyword(s):  
Landfill Leachate ◽  
Treatment Cost ◽  
Great Influence ◽  
Leachate Treatment ◽  
Dissolved Iron ◽  
Pre Treatment ◽  
Cost Efficient ◽  
Mature Landfill Leachate ◽  
Electro Coagulation ◽  
Total Dissolved Iron

This study focused on the reduction of the treatment cost of mature landfill leachate (LL) by enhancing the coagulation pre-treatment before a UVA-LED photo-Fenton process. A more efficient advanced coagulation pretreatment was designed by combining conventional coagulation (CC) and electro-coagulation (EC). Regardless of the order in which the two coagulations were applied, the combination achieved more than 73% color removal, 80% COD removal, and 27% SUVA removal. However, the coagulation order had a great influence on both final pH and total dissolved iron, which were key parameters for the UVA-LED photo-Fenton post-treatment. CC (pH = 5; 2 g L−1 of FeCl36H2O) followed by EC (pH = 5; 10 mA cm−2) resulted in a pH of 6.4 and 100 mg L−1 of dissolved iron, whereas EC (pH = 4; 10 mA cm−2) followed by CC (pH = 6; 1 g L−1 FeCl36H2O) led to a final pH of 3.4 and 210 mg L−1 dissolved iron. This last combination was therefore considered better for the posterior photo-Fenton treatment. Results at the best cost-efficient [H2O2]:COD ratio of 1.063 showed a high treatment efficiency, namely the removal of 99% of the color, 89% of the COD, and 60% of the SUVA. Conductivity was reduced by 17%, and biodegradability increased to BOD5:COD = 0.40. With this proposed treatment, a final COD of only 453 mg O2 L−1 was obtained at a treatment cost of EUR 3.42 kg COD−1.

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