scholarly journals Characterizing Seasonal Variation in Landfill Leachate Using Leachate Pollution Index (LPI) at Nam Son Solid Waste Landfill in Hanoi, Vietnam

Environments ◽  
2021 ◽  
Vol 8 (3) ◽  
pp. 17
Author(s):  
Son Tran Hoai ◽  
Huong Nguyen Lan ◽  
Nga Tran Thi Viet ◽  
Giang Nguyen Hoang ◽  
Ken Kawamoto
Keyword(s):  
Environmental Pollution ◽  
Landfill Leachate ◽  
Pollution Index ◽  
Temporal Variations ◽  
Inorganic Pollutants ◽  
Landfill Leachates ◽  
Leachate Treatment ◽  
Waste Landfill ◽  
Permissible Limits ◽  
Leachate Pollution Index

The improper treatment of landfill leachates is one of the major problems associated with waste landfilling and causes serious environmental pollution at waste landfill sites and their surroundings. To develop a suitable landfill leachate treatment system and to minimize the risk of environmental pollution, it is important to characterize seasonal and temporal variations of landfill leachates. This study investigated the leachate quality of the Nam Son waste landfill in Hanoi, Vietnam in 2017–2019 and characterized the potential risks of landfill leachate using a leachate pollution index (LPI). The results of this study showed that the seasonal and temporal variation of the overall LPI during the monitoring period was small and in the range of 20–25 (values 2.5 times higher than the maximum permissible limits of Vietnam National Technical Regulation on Industrial Wastewater). The LPI sub-indices attributed to organic and inorganic pollutants were major components of the LPI. Especially, the annually averaged values of LPI of inorganic pollutants were 7.7 times higher than the maximum permissible limits, suggesting that the treatment of inorganic pollutants, such as ammonium-nitrogen (NH4+–N) and total nitrogen (TN), is highly required at Nam Son landfill to prevent environmental pollution surrounding the landfill site.

scholarly journals Treatment of hazardous waste landfill leachate using Fenton oxidation process

2018 ◽  
Vol 34 ◽  
pp. 02034 ◽  
Author(s):  
Pradeep Kumar Singa ◽  
Mohamed Hasnain Isa ◽  
Yeek-Chia Ho ◽  
Jun-Wei Lim
Keyword(s):  
Reaction Time ◽  
Hazardous Waste ◽  
Landfill Leachate ◽  
Molar Ratio ◽  
Oh Radicals ◽  
Fenton Reagent ◽  
Leachate Treatment ◽  
Experimental Conditions ◽  
Waste Landfill ◽  
Hazardous Waste Landfill

The efficiency of Fenton’s oxidation was assessed in this study for hazardous waste landfill leachate treatment. The two major reagents, which are generally employed in Fenton’s process are H2O2 as oxidizing agent and Fe2+ as catalyst. Batch experiments were conducted to determine the effect of experimental conditions viz., reaction time, molar ratio, and Fenton reagent dosages, which are significant parameters that influence the degradation efficiencies of Fenton process were examined. It was found that under the favorable experimental conditions, maximum COD removal was 56.49%. The optimum experimental conditions were pH=3, H2O2/Fe2+ molar ratio = 3 and reaction time = 150 minutes. The optimal amount of hydrogen peroxide and iron were 0.12 mol/L and 0.04 mol/L respectively. High dosages of H2O2 and iron resulted in scavenging effects on OH• radicals and lowered degradation efficiency of organic compounds in the hazardous waste landfill leachate.

Hazardous waste landfill leachate treatment by combined chemical and biological techniques

2015 ◽  
Vol 57 (28) ◽  
pp. 13236-13245 ◽  
Author(s):  
Eneliis Kattel ◽  
Arthur Kivi ◽  
Kati Klein ◽  
Taavo Tenno ◽  
Niina Dulova ◽  
...  
Keyword(s):  
Hazardous Waste ◽  
Landfill Leachate ◽  
Leachate Treatment ◽  
Waste Landfill ◽  
Hazardous Waste Landfill

scholarly journals Analysis of Ammonia Toxicity in Landfill Leachates

2011 ◽  
Vol 2011 ◽  
pp. 1-6 ◽  
Author(s):  
Takuya Osada ◽  
Keisuke Nemoto ◽  
Hiroki Nakanishi ◽  
Ayumi Hatano ◽  
Ryo Shoji ◽  
...  
Keyword(s):  
Landfill Leachate ◽  
Physicochemical Analysis ◽  
Ammonia Toxicity ◽  
Ammonium Ions ◽  
Contribution Rate ◽  
Toxicity Identification Evaluation ◽  
Landfill Leachates ◽  
Waste Landfill ◽  
Identification Evaluation ◽  
Unionized Ammonia

Toxicity identification evaluation (TIE) phase I manipulations and toxicity test with D. magna were conducted on leachates from an industrial waste landfill site in Japan. Physicochemical analysis detected heavy metals at concentrations insufficient to account for the observed acute toxicity. The graduated pH and aeration manipulations identified the prominent toxicity of ammonia. Based on joint toxicity with additive effects of unionized ammonia and ammonium ions, the unionized ammonia toxicity () was calculated as 3.3 ppm, and the toxicity of ammonium ions () was calculated as 222 ppm. Then, the contribution of ammonia toxicity in the landfill leachate toxicity was calculated as 58.7 vol% of the total toxicity in the landfill leachate. Other specific toxicants masked by ammonia's toxicity were detected. Contribution rate of the toxicants other than by ammonia was 41.3 vol% of the total toxicity of the landfill leachate.

scholarly journals Strategy for Investigation of Filter Material for Wastewater Treatment

2017 ◽  
pp. 141-146
Author(s):  
Britt-Marie Svensson ◽  
Lennart Mårtensson ◽  
Lennart Mathiasson
Keyword(s):  
Landfill Leachate ◽  
Energy Recovery ◽  
Filter Material ◽  
Inorganic Pollutants ◽  
Leachate Treatment ◽  
Incineration Plant ◽  
Naturally Occurring ◽  
Biological Filter ◽  
Comprehensive Picture

This paper presents a strategy for an investigation to give a comprehensive picture of a biological filter aimed for treatment of different kinds of wastewaters, such as landfill leachate, stormwater and wastewater from vehicle washes. The strategy is based on batch equilibrium experiments and includes three main parts. Under focus is the ability of the filter material to simultaneously remove organic and inorganic pollutants from wastewater, as well as the environmental impact of using materials that would normally be waste to build filters, on one hand, and of disposing of used filter material on the other. The filter material used in these tests is naturally occurring materials such as peat and residual products such as carboncontaining ash. A filter material in a treatment system needs eventually to be exchanged either because it has been saturated by pollutants or because the hydraulic conductivity has decreased too much. After usage the filter material is considered solid waste and is to be classified and handled according to that. Several possible alternatives for further handling, i.e. landfilling, combustion or composting can be selected. A characterization of filter material used for three years in a full-scale filter system for landfill leachate treatment has revealed that energy recovery at an incineration plant could be a possible handling alternative for the used filter material.

scholarly journals Assessing landfill leachate quality and leachate treatment efficiency using good sampling practices

2019 ◽  
pp. 183-194
Author(s):  
Cecilia Öman ◽  
Christian Junestedt
Keyword(s):  
Surface Layer ◽  
Landfill Leachate ◽  
Natural Environment ◽  
Complex Nature ◽  
Landfill Leachates ◽  
Leachate Treatment ◽  
Treatment Methods ◽  
Sampling Procedures ◽  
And Storage

A number of the compounds detected in landfill leachates have proved to be harmful to humans and to the natural environment. As a result, appropriate landfill leachate treatment methods must be developed, with the aim to reduce harmful concentrations of pollutants to levels which do not impose a threat to the natural environment. The complex nature of the leachates makes it difficult to select the most appropriate set of treatment methods for a specific landfill, and the actual efficiency of a treatment plant is measured in situ by comparing the quality of the water entering the plant with the quality of the water leaving the plant. The complex nature of the leachates puts high demands on the sampling, handling of sample before analyses, and analyses, as the character of the sample must not be altered. The demands increase with decreasing concentrations of the targeted compounds (µg/1 level or less). Despite this, no standard protocols for sampling and handling of leachate samples exist. The purpose of this study was to give examples of good sampling practices. Important aspects to consider during sampling and handling of samples are; i) sampling of nonhomogenized water bodies, ii) contamination, and iii) alterations of samples during collection and storage. It was found that a number of substances are enriched in the surface layer of a water body, why it was concluded that the surface layer is an important matrix to consider, both concerning the presence and the transport of harmful compounds. The risk of contamination during sampling was evaluated with the use of a field water blank, which was handled as a true water sample. It was found that despite careful handling contaminants were found at low concentrations (µg/1 level) in the field water blank, which indicated a severe risk of contamination during leachate sampling, handling of sample and/or analyses. Also in this study, the alteration of leachate samples during transport and storage was assessed. The results showed that preservation with 0.2 weight-% sodium azide immediately after sampling and storing at 48° C for a maximum of seven days in borosilicate glass bottles, resulted in the lowest loss of organic compounds from the samples. It has been evident since long that the reported character of sampled landfill leachates varies significantly. The variations can been assumed to sometimes origin from the sampling procedures used. In conclusion, the choice of sampling, transport, storage, and sample preparation before analyses is more crucial for the outcome of leachate characterisation studies than sometimes conceived.

Industrial solid waste landfill leachate treatment using electrocoagulation and biological methods

2017 ◽  
Vol 68 ◽  
pp. 137-142 ◽  
Author(s):  
Dheeravath Bhagawan ◽  
Saritha Poodari ◽  
Narala Chaitanya ◽  
Surya Ravi ◽  
Yamuna M. Rani ◽  
...  
Keyword(s):  
Solid Waste ◽  
Landfill Leachate ◽  
Leachate Treatment ◽  
Waste Landfill ◽  
Industrial Solid Waste ◽  
Biological Methods
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