scholarly journals Environmental technology for leachate treatment. joint project between Sweden and Lithuania

2019 ◽  
pp. 427-431
Author(s):  
Lennart Mårtensson
Keyword(s):  
Leachate Treatment ◽  
Environmental Technology ◽  
Efficient Treatment ◽  
Toxic Compounds ◽  
Treatment Methods ◽  
Joint Project ◽  
Leachate Water

There is a need for more efficient treatment methods for purification of leachate from municipal landfills. The leachate can contain toxic compounds that can be harmful to organisms in the surroundings. There have recently been several reports of dead fishes in lakes situated close to landfills. In a joint project named "LAQUA" between Sweden and Lithuania efforts will be taken to find suitable technology for treatment of leachate water from municipal landfills.

Occurrence and Treatment of Pharmaceuticals and Personal Care Products in Surface Water around the Global Region

2014 ◽  
Vol 507 ◽  
pp. 720-724
Author(s):  
Wan Qian Guo ◽  
Hai Ou Cao ◽  
Xian Jiao Zhou ◽  
Ren Li Yin
Keyword(s):  
Surface Water ◽  
Human Health ◽  
Personal Care Products ◽  
Personal Care ◽  
Research Groups ◽  
Efficient Treatment ◽  
Treatment Methods ◽  
The World ◽  
Emerging Issues

The occurrence of pharmaceuticals and personal care products (PPCPs) in surface water, and their potential impacts on human health are emerging issues all over the world. This paper summarizes the data from worldwide research groups, aiming to illustrate the occurrence of PPCPS, and their potential threatens to human health. Furthermore, the current efficient treatment methods for the PPCPS were discussed as well.

scholarly journals Landfill Leachate Treatment Methods and Its Potential for Ammonia Removal and Recovery - A Review

2021 ◽  
Vol 1051 (1) ◽  
pp. 012064
Author(s):  
H Haslina ◽  
J NorRuwaida ◽  
M Dewika ◽  
M Rashid ◽  
Abd Halim Md Ali ◽  
...  
Keyword(s):  
Landfill Leachate ◽  
Ammonia Removal ◽  
Leachate Treatment ◽  
Treatment Methods ◽  
Removal And Recovery

Selection of the Most Appropriate Leachate Treatment Methods: Part 1: A Review of Potential Biological Leachate Treatment Methods

1988 ◽  
Vol 23 (2) ◽  
pp. 308-328 ◽  
Author(s):  
D.J.L. Forgie
Keyword(s):  
Molecular Weight ◽  
Biological Treatment ◽  
Volatile Fatty Acids ◽  
Oxygen Demand ◽  
Leachate Treatment ◽  
Treatment Methods ◽  
Loading Rates ◽  
Treatment Train ◽  
Physical And Chemical ◽  
Selection Of

Abstract This paper presents a review of North American and European literature concerning the physical and chemical characteristics of leachate and the biological treatment methods that have been used or could be used to treat leachate. Leachate characteristics of particular interest include five-day biochemical oxygen demand (BOD5) , chemical oxygen demand (COD), the BOD5/COD ratio, molecular weight and or size of the organics, volatile fatty acids (VFA’s), ammonia and metals. It is demonstrated that biological leachate treatment is most appropriate when the BOD5/COD ratio is high (i.e. > 0.4) and the molecular weight of the majority of the organics is less than 500 g/mole. Tables summarizing the various biological leachate treatment process loading rates are presented. This paper serves as the basis for two companion papers: ”Selection of the Most Appropriate Leachate Treatment Methods, PART 2 : A Review of Recirculation, Irrigation and Potential Physical-Chemical Treatment Methods” and “Selection of the Most Appropriate Leachate Treatment Methods, PART 3: A Decision Model for Treatment Train Selection”.

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.

Combined landfill leachate treatment methods: an overview

2021 ◽  
Author(s):  
Shamimeh Babaei ◽  
Mohammad Reza Sabour ◽  
Saman Moftakhari Anasori Movahed
Keyword(s):  
Landfill Leachate ◽  
Leachate Treatment ◽  
Treatment Methods

Landfill leachate treatment methods: A review

2006 ◽  
Vol 4 (1) ◽  
pp. 51-61 ◽  
Author(s):  
J. Wiszniowski ◽  
D. Robert ◽  
J. Surmacz-Gorska ◽  
K. Miksch ◽  
J. V. Weber
Keyword(s):  
Landfill Leachate ◽  
Leachate Treatment ◽  
Treatment Methods

scholarly journals Review on landfill leachate treatment methods

2020 ◽  
Vol 565 ◽  
pp. 012038
Author(s):  
Tu Anqi ◽  
Zhiyong Zhang ◽  
Hao Suhua ◽  
Li Xia
Keyword(s):  
Landfill Leachate ◽  
Leachate Treatment ◽  
Treatment Methods

Selection of the Most Appropriate Leachate Treatment Methods: Part 2: A Review of Recirculation, Irrigation and Potential Physical-chemical Treatment Methods

1988 ◽  
Vol 23 (2) ◽  
pp. 329-340 ◽  
Author(s):  
D.J.L. Forgie
Keyword(s):  
Chemical Treatment ◽  
Membrane Separation ◽  
High Strength ◽  
Chemical Precipitation ◽  
Activated Carbon Adsorption ◽  
Leachate Treatment ◽  
Treatment Methods ◽  
Carbon Adsorption ◽  
Physical Chemical ◽  
Leachate Management

Abstract This paper reviews potential leachate treatment methods that are non-biological from the traditional wastewater treatment viewpoint. The use and role of recirculation and irrigation in leachate management are reviewed. It is shown that, although recirculation cannot be used as a means of final leachate disposal, it does have a role in decreasing the strength of high strength, acidic phase leachates. Irrigation is shown to be a potential means of final disposal of treated leachate. Physical-chemical treatment (PCT) of leachate using chemical precipitation, coagulation and/or oxidation, activated carbon adsorption, air-stripping, pH adjustment, ion exchange and membrane separation are reviewed. It is shown that PCT is appropriate for leachate treatment when the leachate is low in volatile, degradable organics, i.e. the BOD5/COD ratio is less than 0.1, and/or the molecular weight of most of the organics is greater than 500 g/mole. As a result, it is shown that PCT is best used as a polishing step following biological treatment or treating a leachate from a mature landfill.

scholarly journals Development of Enzymatic Microtoxicity Test for the Toxicity Assay of Chlorophenolic Compounds

2020 ◽  
pp. 14-18
Author(s):  
Arzu Ünal
Keyword(s):  
Enzyme Activity ◽  
Test System ◽  
Toxic Chemicals ◽  
Toxicity Assay ◽  
Environmental Technology ◽  
Toxic Compounds ◽  
Biotechnological Approach ◽  
Laccase Enzyme ◽  
Substantial Extent ◽  
Chlorinated Phenolic Compounds

Enzymes are proteins that serve as catalysts of biological reactions in the animal, plant, and microbial cells. They are quite specific concerning with regard to their substrates. Enzymes lower the activation energy and increase the rate of biochemical reactions. According to the type of reaction catalyzed, enzymes are currently subdivided into six classes, namely oxidoreductases, hydrolases, transferases, lyases, isomerases, and ligases. The effects of toxic chemicals and chlorophenolic compounds on enzyme activity are determined by fast, useful, and simple enzymatic methods. These methods can be carried out in low volumes and automatically using equipment such as a spectrophotometer, fluorometer and scintillation counters. In this study, a new microtoxicity test was developed with the use of the fungal and bacterial β-galactosidase enzyme. In the toxicity experiments, the effects of 2,4,6-trichlorophenol (2,4,6 TCP), 2,4-dichlorophenol (2,4 DCP) and 4-chlorophenol (4 CP) over the β-galactosidase enzyme activity were investigated. In this study, the bacterial and fungal β-galactosidase enzyme was found to be effective in determining the detoxification of some chlorinated phenolic compounds, 2,4,6-TCP, 2,4-DCP, and 4-CP, through the treatment with laccase enzyme. The inhibitor effect of toxic compounds on the activity of the β-galactosidase enzyme was examined. As a result of the studies, 61% inhibition for 2,4,6-TCP, 58% inhibition for 2,4-DCP and 47% inhibition for 4-CP was observed. Mikrotoxicity test system developed in our laboratory which works principally based on inactivation of β-galactosidase activity by toxic chlorinated phenolics, was used for toxicity detection. Data obtained from microtoxicity tests have shown that the dechlorination of chlorinated phenolics with laccase has resulted in the loss of toxic potentiality of these chemicals to a substantial extent. We thought that this study is to be an important contribution to bioremediation science and environmental technology with a new biotechnological approach.

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