scholarly journals Removal of Pollution by Intensive Aeration Technology for Landfill Leachate Treatment

2020 ◽  
Vol 10 (28) ◽  
Author(s):  
Hamri Zineb ◽  
Mouhir Latifa ◽  
Souabi Salah ◽  
Saafadi Laila
Keyword(s):  
Landfill Leachate ◽  
Physicochemical Characterization ◽  
Oxygen Demand ◽  
Major Elements ◽  
Aeration Tank ◽  
Treatment Technique ◽  
Leachate Treatment ◽  
High Purification ◽  
Financial Interests ◽  
Forced Aeration

Background. Landfill leachate is a source of environmental pollution and a major concern for human health because it contains high concentrations of organic and inorganic contaminants. Objectives. The objective of the present study is to validate the efficiency of the forced aeration treatment technique, which consists of intensively injecting a continuous oxygen flow of 16.75 kg/m3/h for 30 days using a bubble air diffuser in a relatively small volume of 1 m3. The principle of the technique is essentially based on acceleration of the degradation of the effluent as well as reduction of the organic and nitrogenous matter contents. Methods. Forced aeration technology was used for the treatment of leachate from the Mohammedia-Benslimane landfill. The sample was treated by injecting a flow of oxygen to accelerate the biodegradability of the pollutants by the microorganisms. Results. The physicochemical characterization of the raw leachate at the inlet of the aeration tank showed high values for chemical oxygen demand (COD) (38,600 mg O2/l), biological oxygen demand (BOD5) (24,000 mg O2/l), and total Kjeldahl nitrogen (TKN) (5,932.45 mg/L). The proposed treatment technique allowed relatively high purification yields to be achieved, with abatement rates for the major elements COD, BOD5 and TKN of 73%, 98%, and 85%, respectively. Conclusions. The treatment of leachate by intensive aeration technology reduces considerably the pollutant load and achieves a high purification yield. Competing Interests. The authors declare no competing financial interests.

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.

Ozonation With Catalyst in Landfill Leachate Treatment

2019 ◽  
pp. 324-354
Author(s):  
Siti Nor Farhana Zakaria
Keyword(s):  
Molecular Structure ◽  
Hydrogen Peroxide ◽  
Hydroxyl Radical ◽  
Chemical Oxygen Demand ◽  
Human Health ◽  
Chemical Reaction ◽  
Landfill Leachate ◽  
Treatment Cost ◽  
Oxygen Demand ◽  
Leachate Treatment

Landfill leachate is a hazardous pollutant generated from a landfill site. Discharge of landfill leachate has caused a major contamination to the environment and detrimental to human health. This chapter introduces an alternative method to treat recalcitrant pollutant in leachate by using ozonation with catalyst. The production of hydroxyl radical in ozonation was not enough to oxidize complex molecular structure in the leachate. Theoretically, the addition of catalyst enhances the capacity of radical and accelerates the chemical reaction. The effectiveness of ozonation with Fenton (O3/Fenton), hydrogen peroxide (O3/H2O2), and zirconium tetrachloride (O3/ZrCl4) in removing pollutant such as chemical oxygen demand (COD), color, and improvement of biodegradability by using this process were also discussed in this chapter. Comparison in term of treatment cost and benefits of the application of chemical as catalyst are briefly elaborated at the end of this chapter.

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.

Raw landfill leachate treatment using an electrocoagulation process with a novel rotating electrode reactor

2019 ◽  
Vol 80 (3) ◽  
pp. 458-465 ◽  
Author(s):  
Ahmed Samir Naje ◽  
Mohammed A. Ajeel ◽  
Isam Mohamad Ali ◽  
Hussein A. M. Al-Zubaidi ◽  
Peter Adeniyi Alaba
Keyword(s):  
Landfill Leachate ◽  
Suspended Solids ◽  
Treatment Process ◽  
Oxygen Demand ◽  
Neutral Medium ◽  
Leachate Treatment ◽  
Rotating Speed ◽  
Electrode Distance ◽  
Treatment Performance ◽  
Electrocoagulation Process

Abstract In this work, landfill leachate treatment by electrocoagulation process with a novel rotating anode reactor was studied. The influence of rotating anode speed on the removal efficiency of chemical oxygen demand (COD), total dissolved solids (TDS), and total suspended solids (TSS) of raw landfill leachate was investigated. The influence of operating parameters like leachate pH, leachate temperature, current, and inter-distance between the cathode rings and anode impellers on the electrocoagulation performance were also investigated. The results revealed the optimum rotating speed is 150 rpm and increasing the rotating speed above this value led to reducing process performance. The leachate electrocoagulation treatment process favors the neutral medium and the treatment performance increases with increasing current intensity. Furthermore, the electrocoagulation treatment performance improves with increasing leachate temperature. However, the performance reduces with increasing inter-electrode distance.

scholarly journals The comparison of efficiency of Fenton and photo-Fenton treatment of stabilised landfill leachate / Porównanie efektywności oczyszczania odcieków z ustabilizowanego składowiska odpadów komunalnych w procesie Fentona i foto-Fentona

2015 ◽  
Vol 26 (3) ◽  
pp. 49-53 ◽  
Author(s):  
Anna Kwarciak-Kozłowska ◽  
Aleksandra Krzywicka
Keyword(s):  
Landfill Leachate ◽  
Fenton Reaction ◽  
Ferrous Sulphate ◽  
Oxygen Demand ◽  
Ammonia Nitrogen ◽  
Ammonia Removal ◽  
Mass Ratio ◽  
Leachate Treatment ◽  
Initial Ph ◽  
Removal Efficiencies

Abstract The goal of this article was to compare the efficiency of Fenton and photo-Fenton reaction used for stabilised landfill leachate treatment. The mass ratio of COD:H2O2 was fixed to 1:2 for every stages. The dose of reagents (ferrous sulphate/hydrogen peroxide) was different and ranged from 0.1 to 0.5. To determine the efficiency of treatment, the BOD (biochemical oxygen demand COD (chemical oxygen demand), TOC (total organic carbon) , ammonia nitrogen and BOD/COD ratio was measured. The experiment was carried out under the following conditions: temperature was 25ºC, the initial pH was adjusted to 3.0. Every processes were lasting 60 minutes. The most appropriate dose of reagents was 0.25 (Fe2+/H2O2). It was found that the application of UV contributed to increase of COD, TOC and ammonia removal efficiencies by an average of 14%.

Optimum of Treatment Condition for Artocarpus heterophyllus Seeds Starch as Natural Coagulant Aid in Landfill Leachate Treatment by RSM

2015 ◽  
Vol 802 ◽  
pp. 484-489 ◽  
Author(s):  
Mohd Suffian Yusoff ◽  
Noor Aina Mohamad Zuki
Keyword(s):  
Landfill Leachate ◽  
Land Surface ◽  
Oxygen Demand ◽  
High Strength ◽  
Suspended Solid ◽  
Solid Waste Disposal ◽  
Leachate Treatment ◽  
Jar Test ◽  
Land Surface Water ◽  
Percentage Yield

Landfill still remains the most commonly employed treatment for municipal solid waste disposal around the world, which generates a high-strength wastewater with complex constituents referred to as landfill leachate. As consequences, if not properly treated and safely disposed, leachate can migrate into soil and subsoils which might cause severe damage to eco-system of land, surface water and groundwater. Aim of this paper is to establish the optimum parameters of starch-based coagulant as an alternative coagulant to remove suspended solid (SS), colour, turbidity, carbon oxygen demand (COD), and ammoniacal-nitrogen in leachate treatment by using RSM method. Leachate was collected from Matang Landfill Site, Perak, Malaysia. In this paper, the efficiency of Jackfruit seeds starch (JSS) act as a coagulant aid is established by using Kategunya method with percentage yield of 33.67%. The starch obtained is then used together with polyaluminium chloride (PAC) in leachate sample. The removal efficiency was determined by a series of experiments using jar test. By using three independent variables including pH, dosage of PAC and dosage of JSS for Central Composite Design (CCD) of RSM, optimum removal of response parameters is carried out. As a result, optimum removal of COD at pH 5, 523.32 mg/L of PAC, 400 mg/L of JSS gives Prob.>F significantly with only 4.32% error. The results showed that, addition of JSS as coagulant aid also helps to reduce the dosage of PAC as well as JSS in leachate. As a conclusion, JSS can be used as a coagulant aid to PAC.

Effects of ion exchange resins in different mobile ion forms on semi-aerobic landfill leachate treatment

2010 ◽  
Vol 61 (3) ◽  
pp. 641-649 ◽  
Author(s):  
Mohammed J. K. Bashir ◽  
Hamidi Abdul Aziz ◽  
Mohd Suffian Yusoff ◽  
A. A. M. Huqe ◽  
Soraya Mohajeri
Keyword(s):  
Ion Exchange ◽  
Landfill Leachate ◽  
Oxygen Demand ◽  
Ammonia Nitrogen ◽  
Ion Exchange Resins ◽  
Leachate Treatment ◽  
Cationic Resin ◽  
Exchange Resins ◽  
Sodium Form ◽  
Cationic Exchanger

Landfill leachate is one of the major contamination sources. In this study, the ability of synthetic ion exchange resins which carry different mobile ion for removing color, chemical oxygen demand (COD), and ammonia nitrogen (NH3-N) from stabilized leachate was investigated. The synthetic resin INDION 225 Na as a cationic exchanger and INDION FFIP MB as an anionic exchanger were used in this study. INDION 225 Na was used in hydrogen form (H+) and in sodium form (Na+), while INDION FFIP MB resin was used in hydroxide form (OH−) and in calcium form (Cl−) form. The results indicated better removal of color, COD and NH3-N by using INDION 225 Na in H+ as compared with Na+ form, while no performance differences were observed by using INDION FFIP MB in OH− or Cl− form. Applying cationic resin followed by anionic resin achieved 97, 88 and 94, percent removal of color, COD and NH3-N. The residual amounts were 160 Pt-Co, 290 mg/L and 110 mg/L of color, COD and NH3-N respectively.

Performance of Ozone/ZrCl4 Oxidation in Stabilized Landfill Leachate Treatment

2015 ◽  
Vol 802 ◽  
pp. 501-506 ◽  
Author(s):  
Siti Nor Farhana Zakaria ◽  
Hamidi Abdul Aziz ◽  
Salem S. Abu Amr
Keyword(s):  
Chemical Oxygen Demand ◽  
Landfill Leachate ◽  
Oxygen Demand ◽  
Landfill Site ◽  
Sanitary Landfill ◽  
Ammoniacal Nitrogen ◽  
Combined Method ◽  
Zirconium Tetrachloride ◽  
Leachate Treatment ◽  
Treatment Facilities

Landfill leachate generation is one of the main problems from sanitary landfill. Chemical oxygen demand (COD), ammoniacal nitrogen (NH3-N), and color are among the most problematic parameters in stabilized leachate. In this regard, dedicated treatment facilities are required before leachate can be discharged into the environment. The performance of the combined ozonation (O3) and zirconium tetrachloride (ZrCl4) to treat two types of stabilized leachate was investigated during this study. Leachate samples were collected from an anaerobic stabilized leachate (Alor Pongsu Landfill Site, APLS) and semi-aerobic stabilized leachate (Pulau Burung Landfill Site, PBLS). Zirconium tetrachloride dosage was determined as 1 g/1 g (COD/ZrCl4 ratio) and then added to the leachate samples with 60 min ozonation at natural leachate pH (8). COD, color, and NH3-N were removed from the APLS sample at 33%, 70%, and 53% rates, respectively, whereas 48%, 75%, and 69%, respectively, from the PBLS samples. Ozone consumption was also calculated with the highest value (3.81 Kg O3/ Kg COD) reported in PBLS, whereas the lowest value (2.32 Kg O3/ Kg COD) was reported in APLS. Biodegradability of (BOD5/COD) was investigated and improved from 0.07 to 0.08 for the APLS samples and 0.05 to 0.11 for the PBLS samples after leachate oxidation. Results showed that the performance of O3/ZrCl4 oxidation is more efficient in treating semi-aerobic stabilized leachate than anaerobic stabilized leachate Moreover, the combined method proved to be more efficient in remediating leachate compared with ozone and zirconium treatment alone.

Landfill leachate treatment using the sequencing batch biofilm reactor method integrated with the electro-Fenton process

2014 ◽  
Vol 68 (6) ◽  
Author(s):  
Dao-Bin Zhang ◽  
Xiao-Gang Wu ◽  
Yi-Si Wang ◽  
Hui Zhang
Keyword(s):  
Landfill Leachate ◽  
Oxygen Demand ◽  
Ammonia Nitrogen ◽  
Biological Oxygen Demand ◽  
Biofilm Reactor ◽  
Electrolysis Time ◽  
Fenton Process ◽  
Optimal Conditions ◽  
Leachate Treatment ◽  
Sequencing Batch Biofilm Reactor

AbstractA study was conducted on the treatment of landfill leachate by combining the sequencing batch biofilm reactor (SBBR) method with the electro-Fenton method. The reduction of chemical oxygen demand (COD), biological oxygen demand (BOD5), and ammonia nitrogen (NH4+-N) from the leachate by the SBBR method was investigated. For the electro-Fenton experiment, the changes in COD and total organic carbon (TOC) with the increase in H2O2 dosage and electrolysis time under optimal conditions were also analysed. The results showed that the average efficiencies of reduction of COD, BOD5, and NH4+ -N achieved using the SBBR method were 21.6 %, 54.7 %, and 56.1 %, respectively. The bio-effluent was degraded by the subsequent electro-Fenton process, which was rapid over the first 30 min then subsequently slowed. After 60 min of the electro-Fenton treatment, the efficiencies of reduction of TOC, COD, and BOD5 were 40.5 %, 71.6 %, and 61.0 %, respectively. There is a good correlation between the absorbance of leachate at 254 nm (UV254) and COD or TOC during the electro-Fenton treatment.

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