Introduction to Leachate Treatment

2020 ◽  
pp. 157-176
Author(s):  
Amin Mojiri ◽  
Siti Fatihah Binti Ramli ◽  
Wan Izatul Saadiah Binti Wan Kamar
Keyword(s):  
Landfill Leachate ◽  
Membrane Filtration ◽  
Chemical Precipitation ◽  
Electrochemical Treatment ◽  
Chemical Oxidation ◽  
Treatment Technique ◽  
Leachate Treatment ◽  
Exchange Adsorption ◽  
Suitable Treatment ◽  
Physical And Chemical

Leachate is created while water penetrates through the waste in a landfill, carrying some forms of pollutants. The goal of this chapter is the introduction to leachate treatment. Biological, physical, and chemical treatments of leachate are the most common methods. The biological techniques in leachate treatment are studied. The physical-chemical ways for landfill leachate treatment like chemical precipitation, chemical oxidation, coagulation–flocculation, membrane filtration, ion exchange, adsorption and electrochemical treatment are studied. The landfill leachate properties, technical applicability and constraints, effluent discharge alternatives, cost-effectiveness, regulatory requirements and environmental impact are important factors for selection of the most suitable treatment technique for landfill leachate treatment.

Introduction to Leachate Treatment

2015 ◽  
pp. 200-218
Author(s):  
Amin Mojiri ◽  
Siti Fatihah Binti Ramli ◽  
Wan Izatul Saadiah Binti Wan Kamar
Keyword(s):  
Landfill Leachate ◽  
Membrane Filtration ◽  
Chemical Precipitation ◽  
Electrochemical Treatment ◽  
Chemical Oxidation ◽  
Treatment Technique ◽  
Leachate Treatment ◽  
Exchange Adsorption ◽  
Suitable Treatment ◽  
Physical And Chemical

Leachate is created while water penetrates through the waste in a landfill, carrying some forms of pollutants. The goal of this chapter is the introduction to leachate treatment. Biological, physical, and chemical treatments of leachate are the most common methods. The biological techniques in leachate treatment are studied. The physical-chemical ways for landfill leachate treatment like chemical precipitation, chemical oxidation, coagulation–flocculation, membrane filtration, ion exchange, adsorption and electrochemical treatment are studied. The landfill leachate properties, technical applicability and constraints, effluent discharge alternatives, cost-effectiveness, regulatory requirements and environmental impact are important factors for selection of the most suitable treatment technique for landfill leachate treatment.

Development of magnetic nano-geocomposite for groundwater and leachate treatment: A Landfill Management Perspective

2020 ◽  
Author(s):  
Nivedita Pradhan ◽  
Manish Kumar
Keyword(s):  
Landfill Leachate ◽  
Emerging Contaminants ◽  
High Surface ◽  
High Surface Area ◽  
Operating Conditions ◽  
Future Research ◽  
Leachate Treatment ◽  
Freundlich Isotherms ◽  
Landfill Management ◽  
Physical And Chemical

<ul>Landfill leachate, a highly contaminated percolating effluent can cause a considerable threat to human as well as environmental health. We developed a novel nano composite using the polymer encapsulated magnetic geopolymer for efficient removal of multi contaminants (As, Zn, Fe, Co, Cu, Ni, Pb, F, NO 3 - , and PO 4 3- ) present in the landfill leachate and groundwater of the Pirana solid waste dumping site, Ahmedabad, Gujarat. A series of batch and column sorption experiments were carried out to find the best-operating conditions for optimum removal efficiency. Results revealed that in the range of 50-60% of multi-contaminant removal is possible using the newly developed adsorbent which has high surface area as well as mixed functional groups for the removal of both cationic (Zn, Fe, Co, Cu, Ni, and Pb) and anionic (F, NO 3 - , and PO 4 3- ) contaminants present in the leachate. Batch study shows that both physical and chemical sorption are equally operational and multilayer removal following the Freundlich isotherms predominantly. The batch test mimics the equilibrium condition only. The study recommends column study under different follow conditions using leachate and groundwater, followed by a regeneration study for its reusability and development of the field implementation schemes. The future research is required to address the decontamination of emerging contaminants like pharmaceuticals, pesticides and fertilizers, industrial additives and antibacterial agents.</ul>

The use of extended aeration and in-series surface-flow wetlands for landfill leachate treatment

1995 ◽  
Vol 32 (3) ◽  
pp. 119-128 ◽  
Author(s):  
Craig D. Martin ◽  
Keith D. Johnson
Keyword(s):  
Solid Waste ◽  
Constructed Wetlands ◽  
Landfill Leachate ◽  
Oxygen Demand ◽  
Surface Flow ◽  
Fecal Coliforms ◽  
Treatment Technique ◽  
Leachate Treatment ◽  
The Usa ◽  
Minimum Criteria

Recently in the USA, the Solid Waste Industry has undergone specific changes in landfill regulations. The Federal Resource Conservation and Recovery Acts (RCRA); and EPA subtitle D regulations, as well as stringent State regulations, impose minimum criteria for municipal solid waste facilities in the areas of location, operation, groundwater monitoring, and leachate management. In conjunction with these State and Federal mandates the University of West Florida developed a leachate treatment technique utilizing extended aeration and surface-flow constructed wetlands. Sampling of water quality has occurred monthly since February 1992. Parameters examined include: Nitrogen (NH3,), Total Suspended Solids (TSS), Total Phosphate (TPO4), Total Organic Carbon (TOC), pH, Alkalinity, and Chlorides. Chemical Oxygen Demand (COD), Total and Fecal Coliforms, Priority Pollutant Metals, and limited organic analytes are sampled on a less frequent basis. Samples are collected at a raw leachate site (L0), primary aerated lagoon (L1), and 6 stations within the 1.1 hectare constructed wetland complex (S1; W1; W3; W5; W7; W9) and one sandfilter (SF) location. Results thus far indicate removal percentages of the tested analytes average between 64% and 99%. This data suggests various physical, microbiological and chemical processes occurring within the aerated lagoon and constructed wetlands can provide an effective alternative to standard techniques for landfill leachate treatment and disposal. The methods as described have proven to be ideal for the circumstances occurring at the Perdido Landfill.

Concentrated Landfill Leachate Treatment by Electro-Ozonation

2019 ◽  
pp. 150-170 ◽  
Author(s):  
Amin Mojiri ◽  
Lou Ziyang ◽  
Wang Hui ◽  
Ali Gholami
Keyword(s):  
Landfill Leachate ◽  
Combined Treatment ◽  
Oxygen Demand ◽  
Treatment Technique ◽  
Leachate Treatment ◽  
Primary Methods ◽  
Membrane Processes ◽  
Treatment Processes ◽  
The World ◽  
Pressure Driven

Municipal solid waste has continued to be a major problem in many nations of the world. The primary methods of treating landfill leachate include physical-chemical and biological treatment processes. Pressure-driven membrane processes, such as microfiltration, ultrafiltration, nanofiltration, and reverse osmosis (RO), are among the utmost promising and capable ways for treating landfill leachate. The concentrated leachate created from pressure-driven membrane processes typically represents 13%–30% of total incoming landfill leachate. Concentrated leachate is a dark brown solution with high levels of pollutants. Treating concentrated leachate is extremely difficult, and thus, a combined treatment system is suggested. In the present study, concentrated landfill leachate was treated using a combined treatment technique that included electro-ozonation. The removal efficacies of chemical oxygen demand (COD), color, and nickel were monitored at original pH (7.3) as well as current and voltage of 4 A and 9 V, respectively.

scholarly journals Abatement of organic pollutants using fly ash based adsorbents

2017 ◽  
Vol 76 (10) ◽  
pp. 2580-2592 ◽  
Author(s):  
Kayode Adesina Adegoke ◽  
Rhoda Oyeladun Oyewole ◽  
Bukola Morenike Lasisi ◽  
Olugbenga Solomon Bello
Keyword(s):  
Fly Ash ◽  
Organic Pollutants ◽  
Human Life ◽  
Chemical Precipitation ◽  
Electrochemical Treatment ◽  
Chemical Oxidation ◽  
High Porosity ◽  
Environmental Implications ◽  
Adsorption Sites ◽  
Treatment Techniques

Abstract The presence of organic pollutants in the environment is of major concern because of their toxicity, bio-accumulating tendency, threat to human life and the environment. It is a well-known fact that, these pollutants can damage nerves, liver, and bones and could also block functional groups of essential enzymes. Conventional methods for removing dissolved pollutants include chemical precipitation, chemical oxidation or reduction, filtration, ion-exchange, electrochemical treatment, application of membrane technology, evaporation recovery and biological treatment. Although all the pollutant treatment techniques can be employed, they have their inherent advantages and limitations. Among all these methods, adsorption process is considered better than other methods because of convenience, easy operation and simplicity of design. A fundamentally important characteristic of good adsorbents is their high porosity and consequent larger surface area with more specific adsorption sites. This paper presents a review of adsorption of different pollutants using activated carbon prepared from fly ash sources and the attendant environmental implications. Also, the ways of overcoming barriers to fly ash utilization together with regeneration studies are also discussed.

Removal of Phosphate and Fluoride from Industrial Wastewater – A Short Review

2014 ◽  
Vol 625 ◽  
pp. 805-808 ◽  
Author(s):  
Muhammad Zulfiqar ◽  
Abdul Aziz Omar ◽  
Sujan Chowdhury
Keyword(s):  
Drinking Water ◽  
Industrial Wastewater ◽  
Environmental Issues ◽  
Short Review ◽  
Chemical Precipitation ◽  
Maintenance Cost ◽  
Treatment Technology ◽  
Exchange Adsorption ◽  
Suitable Treatment ◽  
Selection Of

Industries producing fertilizers, aluminium, steel, bricks, glass, and semiconductor discharge several thousand tons of phosphate and fluoride per year into the open atmosphere in the form of wastewater which cause many environmental issues as well as loss of drinking water. The objective of this review is to select the suitable method for the removal of phosphate and fluoride from industrial wastewater which is highly hazardous and acidic in nature. So that treated water can be reused for agricultural and industrial purposes. Industries discharge several thousand tons of phosphate and fluoride per year in the form of wastewater which cause many environmental issues and loss of drinking water. This review is provided with aimed a precise and accurate knowledge for the removal of phosphate and fluoride from industrial wastewater. A lot of technologies are available for the treatment of industrial wastewater treatment including chemical precipitation, crystallization, ion exchange, adsorption, reverse osmosis and nanofiltration methods. The selection of most suitable treatment technology is based on retention time, principle of operation, applications, chemicals and maintenance cost.

scholarly journals Response Surface Methodology (RSM)-Based Prediction and Optimization of the Fenton Process in Landfill Leachate Decolorization

Processes ◽  
2021 ◽  
Vol 9 (12) ◽  
pp. 2284
Author(s):  
Anita Maslahati Roudi ◽  
Sultan Salem ◽  
Amin Maslahati ◽  
Muhammad Imran
Keyword(s):  
Response Surface Methodology ◽  
Reaction Time ◽  
Response Surface ◽  
Landfill Leachate ◽  
Color Removal ◽  
Ion Concentration ◽  
Treatment Technique ◽  
Fenton Process ◽  
Variable Response ◽  
Leachate Treatment

As an advanced oxidative processes, the Fenton process is receiving popularity as a wastewater treatment technique that can be used for hazardous landfill leachate. The treatment is simple, yet involves complex interactions between the affecting parameters including reaction time, H2O2/Fe2+ ratio, pH, and iron (II) ion concentration. Hence, the purpose of this present study was to analyze the factors affecting landfill leachate treatment as well as their interaction by means of response surface methodology (RSM) with central composite design. The independent variables were reaction time, H2O2/Fe2+ ratio, iron (II) ion concentration, and pH, and the dependent variable (response) was color-removal percentage. The optimum treatment conditions for pH, H2O2/Fe2+ ratio, Fe2+ concentration, and reaction time were 8.36, 3.32, 964.95 mg/L, and 50.15 min, respectively. The model predicted 100% color removal in optimum conditions, which was close to that obtained from the experiment (97.68%). In conclusion, the optimized Fenton process using the RSM approach promotes efficient landfill leachate treatment that is even higher than that already reported.

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