leachate removal Articles
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Cadmium and lead removal from municipal landfill leachate using carbon adsorbent made from oil palm shell
This paper focused on adsorption process for metals removal from landfill leachate using oil palm shell as adsorbent. Raw shells were grinded to sizes of about 2 mm, followed by heating in at 420°C for a period of 4 hours. Batch test indicated a removal of more than 60% Cd and Pb from leachate samples. The removal process agrees with the Freundlich isotherm model. Column test for continuous flow ...
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Removal of COD and colour from old-landfill leachate by Advanced Oxidation Processes
This research aims to apply Advanced Oxidation Processes (AOPs) using ozonation, combined O3/H2O2 and Fenton reaction for simultaneous COD and colour removal from old-landfill leachate. The efficiencies of the AOPs for both COD and colour removal could be ranked in this order; Fenton reaction > O3/H2O2 > O3. The Fenton reaction, operated at pH 3 could significantly remove more than 85% of colour ...
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A laboratory-scale mixed multibarrier for removal of ammonium from landfill leachate contamination
A column-scale multibarrier, combining nitrification and ion exchange processes in a mixed configuration, was evaluated for the removal of ammonium (325 ± 60 mg N L−1) from landfill leachate contamination. Inoculating granular clinoptilolite with nitrifying bacteria resulted in a 3.2 times higher overall ammonium removal, compared with a non-inoculated control. Interestingly, nitrifying activity ...
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Physico-chemical treatment of anaerobic landfill leachate using activated carbon and zeolite: batch and column studies
Leachate generated from one of the old landfills in Malaysia contains high concentrations of colour, COD, iron and ammoniacal. The ability of activated carbon-zeolite mixtures as an adsorbent was investigated in this research. Results of the batch experiments indicated that more than 522.2 mg/g of colour, 52.63 mg/g of iron, 232.6 mg/g of COD and 21.01 mg/g of ammoniacal nitrogen were removed by ...
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Influence of magnetic treatment on the improvement of landfill leachate treatment
Magnetic treatment is an alternative simple approach by which landfill leachate treatment could be improved. The purpose of landfill leachate treatment is to remove the Suspended Solids, Chemical Oxygen Demand (COD) and Biochemical Oxygen Demand (BOD). Based on experiment by using circulation flowing system with a magnetic strength of 0.55 T, it was shown that the leachate quality could be ...
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Customers recommend leachate pumps from Geotech - Case Study
Application Leachate recirculation and condensate removal from gas lines Equipment The AP AutoPump range Location Sites across the UK Customer H&J Pipe Jointing Services Ltd Requirement Colin Jones of H&J Pipe Jointing Services said, "We were looking to supply pumps that were fit for purpose and that did the job, and after trying other brands we soon realised that the AP range ...
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Removal of ammoniacal nitrogen and COD from semi-aerobic landfill leachate using low-cost activated carbon?zeolite composite adsorbent
A carbon-zeolite composite adsorbent has been studied for COD and ammoniacal nitrogen removal in semi-aerobic landfill leachate. The optimum conditions for adsorption in the batch study occurred at pH 7, shaking speed of 200 rpm, and contact time of 105 min. The Langmuir isotherms corresponded slightly better than Freundlich isotherm for both ammoniacal nitrogen and COD removals. The Langmuir ...
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Comparative analysis of extended aeration and Fenton process in landfill leachate treatment
This research is undertaken to investigate various operating conditions for minimising sludge disposal and maximising chemical oxygen demand from leachate. With conventional extended aeration process the optimum removal of COD and colour were 36% and 24% respectively. In Fenton process, for optimum pH of 5 and optimum H2O2/Fe2+ molar ratio of 1.3, the dosages of H2O2 and Fe2+ were found 1000 mg/l ...
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Precipitation of heavy metals from coal ash leachate using biogenic hydrogen sulfide generated from FGD gypsum
Investigations were undertaken to utilize flue gas desulfurization (FGD) gypsum for the treatment of leachate from the coal ash (CA) dump sites. Bench-scale investigations consisted of three main steps namely hydrogen sulfide (H2S) production by sulfate reducing bacteria (SRB) using sulfate from solubilized FGD gypsum as the electron acceptor, followed by leaching of heavy metals (HMs) from ...
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Ammonia removal from landfill leachate by struvite formation: an alarming concentration of phosphorus in the treated effluent
This study examined the removal of ammonia nitrogen from the leachate of a landfill site using the chemical precipitation of struvite (MgNH4PO4.6H2O). This procedure achieved a reduction in the ammonia concentration that was higher than 99% when the molar ratio of 1.8:1.0:1.4 for Mg2+:NH4+:PO43− was adopted. The metal concentration found in the precipitate formed was lower than the limits set ...
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Primary treatment of anaerobic landfill leachate using activated carbon and limestone: batch and column studies
Leachate generated from an old landfill in Taiping, Perak, Malaysia contains high colour, COD, iron and ammoniacal nitrogen. Activated carbon?limestone mixture was used as a primary treatment process. More than 86% of colour and COD, 95% of iron, and 48% of ammoniacal nitrogen were removed by a mixture of activated carbon and limestone (15:25 by volume) in the batch study compared with 70, 80 and ...
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Leachate Collection & Removal Systems – Pump Stations
Romtec Utilities designs and supplies pump stations for many different types of applications, including leachate collection and removal systems. Leachate pump stations are required whenever water passes through a bed of solids and extracts contaminating elements. The most common scenario for collecting and pumping leachate is for landfills, but there are industrial applications as ...
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Effects of physicochemical factors on Cr(VI) removal from leachate by zero-valent iron and α-Fe2O3 nanoparticles
The effects of nanoparticle dosage, initial hexavalent chromium concentration, pH value, reaction temperature, and initial concentration of humic acid (HA) on chromate (CrO42−) removal from landfill leachate by nanoscale zero-valent iron (NZVI) and hematite (α-Fe2O3) nanoparticles were examined in the present investigations. The Cr(VI) removal rate decreased as the initial Cr(VI) concentration ...
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Effect of chloride concentration on nitrogen removal from landfill leachate in sequencing batch reactor after MAP pretreatment
Leachate generated from landfill is becoming a great environmental challenge to China as it contains high concentration of COD, ammonium and some other substances. Nitrogen removal through the conventional nitrification-denitrification process is hampered by the low C/N ratio especially for the old age landfill sites and the high energy consumption for aeration. In this study, the combination of ...
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COD removal from leachate by electrocoagulation process: treatment with monopolar electrodes in parallel connection
This study examines the removal of chemical oxygen demand (COD) from landfill leachate generated from the municipal landfill site of Bingol, Turkey. The effect of parameters such as current density, pH, and inter-electrode distance during the electrocoagulation (EC) process on COD removal of the process was investigated. Moreover, for COD removal, the energy consumption and operating costs ...
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CEE-USV with 33kHz CEESCOPE LITE Tackles Deep Acid Pit Lake Survey
On mine sites, pit lakes form as excavated mine pits fill with water; often the water is actually acidic, corrosive process leachate solution highly rich in dissolved components such as copper. The leachate may be removed and reprocessed to extract the desired metal. Usually, such pit lakes are too hazardous to survey on a manned boat so a USV is ideal. Existing land survey data may be used to ...
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Landfill leachate treatment for biological nutrient removal from wastewater
Substantial volumes of leachate have been generated at the recently opened lined cells of the Orange County Landfill located in central Florida. To accommodate these volumes, a force main was installed to deliver leachate to the Eastern Service Area Wastewater Treatment Facility (ESAWTF) operated by the Orange County Public Utilities Division, which uses a biological nutrient removal process. ...
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Sequential treatment of an old-landfill leachate
This work investigates the performance of combined techniques applied to the treatment of an old-landfill leachate, which presents high salinity, low biodegradability (BOD5/COD around 0.05) and high ammonia concentration. Three sequences of processes were employed, including coagulation/flocculation, chemical oxidation, biological treatment and ammonia stripping. The association of ...
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Co-treatment of old landfill leachate and municipal wastewater in sequencing batch reactor (SBR): effect of landfill leachate concentration
Sequencing batch reactor (SBR) was assessed for direct co-treatment of old landfill leachate and municipal wastewater for chemical oxygen demand (COD), nutrients and turbidity removal. Nitrogen removal was achieved by sequential nitrification and denitrification under post-anoxic conditions. Initially, SBR operating conditions were optimized by varying hydraulic retention time (HRT) at 20% ...
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Tube-Type Skimming in Mining operations – A Simple Oil Removal Solution
A steady flow of technological innovations in electronics, construction, healthcare and other fields is driving the resurgence of copper mining throughout the world. In Peru alone, copper production jumped nine percent in the first three months of 2014.* Industry observers predict that the demand for copper will continue to grow at a fast clip for at least the next five years. Along with the ...
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