A review of groundwater contamination near municipal solid waste landfill sites in China

Han, Zhiyong; Ma, Haining; Shi, Guozhong; He, Li; Wei, Luoyu; Shi, Qingqing

doi:10.1016/j.scitotenv.2016.06.201

Cited by 285 publications

(95 citation statements)

References 23 publications

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“…Leachate, when released untreated, may damage surface and ground water resources, soil, fauna and flora, as well as human health . Therefore, leachate treatment is essential prior to its disposal into the environment.…”

Section: Introductionmentioning

confidence: 99%

Supercritical water oxidation treatment of humic acid as a model organic compound of landfill leachate

et al. 2020

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Landfill leachate is a complex and variable effluent, rich in organic and inorganic matters resistant to decomposition, and is an extreme pollutant. Humic acids (HA) are some of the most refractive substances in the leachates, which is the reason why they have been used as an organic model. The degradation of an HA solution through supercritical water oxidation (ScWO) was evaluated under a constant pressure of 22.5 MPa, temperatures from 400°C to 600°C, and reaction times from 15 to 60 seconds. The results showed that the most influential factor was temperature and it guided the operational conditions of the ScWO for the landfill leachate (22.5 MPa, 600°C, and 60 seconds). The landfill leachate treatment promoted high removal rates of true colour (87%), total dissolved solids (94%), nitrate (70%), and total phosphorus (96%). In addition, it removed 57% of the COD, which was similar to the HA removal rate (61%) under the same operational conditions. This indicates that HA are an adequate organic model for landfill leachates. The results suggest that ScWO is a clean and promising treatment technology that can be applied to landfills and can have even better results if used in combination with oxidizers and catalysts, or with the use of higher temperatures.

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Section: Introductionmentioning

confidence: 99%

Supercritical water oxidation treatment of humic acid as a model organic compound of landfill leachate

et al. 2020

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“…The main components of garden waste, lignin and cellulose, are recalcitrant to degradation, leaving only landfilling and direct burning as traditional disposal methods. Traditional landfilling and incineration methods not only use land resources, but also cause other problems, such as dust particle production, soil and groundwater contamination, pathogenic bacteria growth, and air pollution [3]. To lessen the effects of garden waste disposal on the environment and mitigate environmental pollution, biological composting employs microbial action in waste piles to transform organic solid waste into stable humus and organic fertilizer.…”

Section: Introductionmentioning

confidence: 99%

Effects of a novel thermophilic cellulose-degrading agent on the quality of compost and change in microbial community of garden waste

Fan

Jia

et al. 2019

Preprint

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12Knowledge about the microbial communities in composting has advanced, but definitive 13 knowledge concerning the application of actinomycetal communities in garden waste 14 composting is still lacking. In this study, we compared the effects of amending compost with 15 mixed agent M1 (five high-degradability strains) and other agents on the physicochemical 16 indices and microbial community succession. The results showed that Pile A (only applying 17 M1), exhibited a pH closer to neutral, the complete degradation of organic matter, and the 18 highest remaining levels of nitrogen, phosphorus, and potassium. The seed germination rate, 19 root length, and seed germination index values were significantly higher in piles amended 20 with M1 and/or commercially available agents than in piles without exogenous microbial 21 agents. Analyzing the microbial communities, these treatments were dominated by 22 Proteobacteria, Firmicutes, Actinobacteria, and Bacteroidetes during composting. The amount 23 of Streptomyces was negatively correlated with the carbon/nitrogen ratio and positively 24 correlated with total phosphorus and total potassium. Adding M1 increased microbial 25 diversity, and the dominant microbial communities at the end of composting were similar to 26 those found in the commercial microbial inoculum. Overall, agent M1 can shorten the 27 composting process and increase the extent of degradation. This research provides additional 28 insights into the potential function of Actinomycetes in compost ecology. 29 30 31 thermophilic cellulose-degrading bacteria 32 33 34 35 36 37 38 39 40 41 42 43 45 Waste management is one of the main issues affecting all developing nations [1]. In 46 China, with the acceleration of urbanization, the amount of green area coverage is increasing, 47 but tons of organic solid waste are produced with no means for effective decomposition, 48 representing added stress to the environment [2]. The main components of garden waste, 49 lignin and cellulose, are recalcitrant to degradation, leaving only landfilling and direct 50 burning as traditional disposal methods. Traditional landfilling and incineration methods not 51 only use land resources, but also cause other problems, such as dust particle production, soil 52 and groundwater contamination, pathogenic bacteria growth, and air pollution [3]. To lessen 53 the effects of garden waste disposal on the environment and mitigate environmental pollution, 54 biological composting employs microbial action in waste piles to transform organic solid 55 waste into stable humus and organic fertilizer. Biological composting can directly transform 56 large amounts of organic waste for compost production; however, the unreliability of the 57 quantity and biodegradability of the indigenous functional microbial community in compost 58 often leads to low composting efficiency and undesirable compost quality [4]. 59 Many studies have shown that inoculation with exogenous microorganisms is an 60 effective method for the biodegradation of organic matter a...

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“…Finding an appropriate site selection requires an organized and systematic approach. Generally, regarding environmental dimensions, social/cultural considerations, political boundaries, legal requirements, aesthetic, technical and economic issues are essential on specification of proper waste disposal site evaluation criteria (Fabbricino, 2011;Tayyebi, et al, 2010;Han et al, 2016; Waste Management Agency and the University of Science and Technology Iran, 2011; Udeorji et al, 2005;Udeorji and Oke, 2007).…”

Section: Introductionmentioning

confidence: 99%

Uncertainty Modelling of Waste Disposal Site Selection (Case Study: Marivan City)

Shekari

Samany‬

Omidipoor

et al. 2018

AJW

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Waste disposal site selection is complex and multifaceted decision making process. In this regard to find appropriate sites, there are different local, national and international standards. These standards emphasize on certain criteria and related on different environmental, economic, social and political considerations. Lack of a comprehensive, integrated and efficient waste disposal site selection approach for determination of the proper sites stems from different experts comments. Since every expert in such problems doesn't have adequate knowledge of all aspects about the subject; their opinions are facing with uncertainty. This study aims to modeling uncertainty of waste disposal site selection based on Dempster-Shafer Theory (DST). The main contribution of this study is the reduction of uncertainty in the standard combination according to experts using DST. In this research three main standards including 'Environment Protection Agency of Iran (EPAI)', 'Management and Planning Organization of Iran (MPOI)' and 'Minnesota Pollution Control Agency (MPCA)' standards are considered and then site selection performed for each standard independently. In order to combining these standards, opinions of 40 experts are attained through DST as an integration approach that is able to manage the uncertainty. These comments are examined by DST and gained results are depicted as waste disposal location. Finally, the achieved results are compared with the results of simple weighting method (average of the opinion experts). Results showed that standard weight in questioning, that does not follow the normal, gives a lot of uncertainty in analysis that DST significantly reduces its impact.

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A review of groundwater contamination near municipal solid waste landfill sites in China

Cited by 285 publications

References 23 publications

Supercritical water oxidation treatment of humic acid as a model organic compound of landfill leachate

Supercritical water oxidation treatment of humic acid as a model organic compound of landfill leachate

Effects of a novel thermophilic cellulose-degrading agent on the quality of compost and change in microbial community of garden waste

Uncertainty Modelling of Waste Disposal Site Selection (Case Study: Marivan City)

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