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 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.

Toxicity identification evaluation of landfill leachate using fish, prawn and seed plant

2016 ◽  
Vol 55 ◽  
pp. 231-237 ◽  
Author(s):  
Setia Budi ◽  
B. Asih Suliasih ◽  
Mohammad Shuhaimi Othman ◽  
Lee Yook Heng ◽  
Salmijah Surif
Keyword(s):  
Landfill Leachate ◽  
Seed Plant ◽  
Toxicity Identification Evaluation ◽  
Identification Evaluation ◽  
Toxicity Identification

Treatment of landfill leachates: ammonia removal via nitrification and denitrification and further COD reduction via Fenton's treatment followed by activated sludge

1997 ◽  
Vol 36 (12) ◽  
pp. 341-348 ◽  
Author(s):  
Jae-Ho Bae ◽  
Sang-Keun Kim ◽  
Hyun-Sik Chang
Keyword(s):  
Activated Sludge ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Nitrate Nitrogen ◽  
Ammonia Removal ◽  
Ammonia Toxicity ◽  
Landfill Leachates ◽  
Waste Landfill ◽  
Second Stage ◽  
Complete Nitrification

Leachates from a municipal solid waste landfill were treated by anaerobic filter (AF) and two-stage activated sludge (AS) for the removal of ammonia. Nitrification in the first stage AS was efficient, but was unstable with temporary accumulations of nitrite by free ammonia toxicity. With the second stage AS, complete nitrification of ammonia and nitrite was achieved. Denitrification via nitrite occurred with the first stage AS effluent recycle, and the resulting AF effluent NOx concentration was kept lower compared to the case in which denitrification via nitrate only occurred with the second stage AS effluent recycle. This might happen because of low COD/N ratio of the raw leachate, and suggests that denitrification via nitrite may be a valuable option. In AF, denitrifiers out-compete methanogens for COD. Ammonia-removed leachate was treated with Fenton's reagents followed by post-AS for further COD removal. Fenton's treatment reduced COD by 63%. Up to 74 mg/L of COD was removed when 100 mg/L of sucrose was added to post-AS. With the above treatment system, 1400∼1800 mg/L of NH4-N was completely removed, leaving 200 mg/L of nitrate nitrogen. Also, 4000∼7000 mg/L of COD in the raw leachate was reduced to 150∼200 mg/L.

scholarly journals Case Study of Toxicity Identification Evaluation (TIE) Applied to the Selected Factory Effluents in Tokushima, Japan

2015 ◽  
Vol 25 (1) ◽  
pp. 11-17
Author(s):  
Hiroshi YAMAMOTO ◽  
Kaori IKEBATA ◽  
Yusuke YASUDA ◽  
Ikumi TAMURA ◽  
Norihisa TATARAZAKO
Keyword(s):  
Toxicity Identification Evaluation ◽  
Identification Evaluation ◽  
Toxicity Identification
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