Removal of pollutants and reduction of bio-toxicity in a full scale chemical coagulation and reverse osmosis leachate treatment system

Fouling characteristics of reverse osmosis (RO) membrane with chemical coagulation and microfiltration (MF) pre-treatment were investigated at full-scale leachate treatment systems. In chemical coagulation pre-treatment, solid separation from stabilized leachate was performed by ferric chloride coagulation followed by sand filtration. Meanwhile, MF pre-treatment and the RO system utilized direct filtration using a 0.03 µm membrane without chemical addition. MF pre-treatment yielded better pollutant removals in terms of organics and nitrogen. The study on effect of pre-treatment on RO membrane fouling revealed that accumulated foulant on the RO membrane in MF pre-treatment was significantly lower than that of chemical coagulation. Nevertheless, NaOH cleaning of the fouled RO membrane after chemical coagulation pre-treatment could better recover its permeate flux, thus suggesting that the formation of a loose-structure cake layer by chemical coagulation pre-treatment could allow effective penetration of chemical cleaning and detachment of foulant layer from the membrane surface.

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16S rRNA gene-based comprehensive analysis of microbial community compositions in a full-scale leachate treatment system

Journal of Bioscience and Bioengineering ◽

10.1016/j.jbiosc.2016.06.003 ◽

2016 ◽

Vol 122 (6) ◽

pp. 708-715 ◽

Cited By ~ 8

Author(s):

Hoang T.N. Dao ◽

Kyohei Kuroda ◽

Nozomi Nakahara ◽

Tsuyoshi Danshita ◽

Masashi Hatamoto ◽

...

Keyword(s):

Microbial Community ◽

16S Rrna ◽

16S Rrna Gene ◽

Comprehensive Analysis ◽

Full Scale ◽

Treatment System ◽

Rrna Gene ◽

Leachate Treatment

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Cost estimation of landfill leachate treatment by reverse osmosis in a Brazilian landfill

Waste Management & Research ◽

10.1177/0734242x20928411 ◽

2020 ◽

Vol 38 (10) ◽

pp. 1087-1092

Author(s):

Ronei de Almeida ◽

Daniele Maia Bila ◽

Bianca Ramalho Quintaes ◽

Juacyara Carbonelli Campos

Keyword(s):

Reverse Osmosis ◽

Landfill Leachate ◽

Cost Estimation ◽

Full Scale ◽

Membrane Process ◽

Total Treatment Cost ◽

Leachate Treatment ◽

Total Treatment ◽

The Cost ◽

Janeiro State

The reverse osmosis (RO) process has been increasingly applied to landfill leachate treatment. The published literature reports several studies that investigated the technical feasibility of RO. However, information about process costs is scarce. Also, companies that run leachate treatment plants do not provide actual costs. To fill this gap, this study aimed to evaluate the treatment costs of a full-scale RO for the treatment of landfill leachate located in Rio de Janeiro State, Brazil. A procedure was proposed to estimate the capital expenses (CAPEX), operational expenses (OPEX), and specific total treatment cost, the total cost per m3 of treated leachate, of the leachate treatment by membrane process, and the results obtained are discussed. The CAPEX for this full-scale RO was estimated at MUS$ 1.413, and OPEX ranged from US$ 0.132 to US$ 0.265 m−3 per year. The cost of leachate treatment has been estimated at US$ 8.58 m−3 considering the operation of the RO-unit for 20 years after landfill closure.

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Performance of landfill leachate treatment system with disc-tube reverse osmosis units

Frontiers of Environmental Science & Engineering in China ◽

10.1007/s11783-008-0024-x ◽

2008 ◽

Vol 2 (1) ◽

pp. 24-31 ◽

Cited By ~ 16

Author(s):

Yanping Liu ◽

Xiujin Li ◽

Baozhen Wang ◽

Shuo Liu

Keyword(s):

Reverse Osmosis ◽

Landfill Leachate ◽

Treatment System ◽

Leachate Treatment

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Short- and long-term fouling characteristics of reverse osmosis membrane at full scale leachate treatment plant

Water Science & Technology ◽

10.2166/wst.2011.844 ◽

2012 ◽

Vol 65 (1) ◽

pp. 127-134 ◽

Cited By ~ 12

Author(s):

Weerapong Rukapan ◽

Benyapa Khananthai ◽

Chart Chiemchaisri ◽

Wilai Chiemchaisri ◽

Thirdpong Srisukphun

Keyword(s):

Reverse Osmosis ◽

Pure Water ◽

Water Flux ◽

Treatment Plant ◽

Full Scale ◽

Short Term ◽

Leachate Treatment ◽

Sedimentation Tank ◽

Pure Water Flux

This research is focused on characterizing the foulants on a reverse osmosis (RO) membrane taken from a full-scale leachate treatment plant in Thailand. The system consists of a physico-chemical pre-treatment unit and RO system and has been in operation for 2 years. Ferric chloride (FeCl3) was added to the open-jet sedimentation tank at 2.0–2.5 g/l dosage for chemical coagulation. The supernatant from the sedimentation tank was polished using a pressurized sand filter prior to entering the RO system. The RO unit consists of seven pressurized vessels and 42 membrane elements (6 elements in each vessel). The recovery ratio and operating pressure in the RO system were maintained at 50% and 1.5–2.5 MPa. Fouled membranes obtained from short-term (6 months) and long-term operation (2 years) were taken from the system and analyzed by autopsy and sequential cleaning methods. The analysis of foulants on the membrane surfaces revealed that Fe deposits at 3.11 g/m2. For short-term operated membranes, water cleaning could recover 32.14 and 7.45% of initial pure water flux on the 1st and 6th membrane elements. NaOH cleaning, however, recovered more than 90% of initial flux, much higher than that of HCl solution in both elements. For long-term operated membranes, pure water flux recovery was below 5% for both 1st and 6th elements. Sequential cleaning by NaOH followed by HCl yielded the best results. Nevertheless, flux recovery through sequential cleaning of long-term operated membranes was only 35.3 and 19.1% for the 1st and the 6th elements, respectively.

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REDUCING ENVIRONMENTAL RISK OF LANDFILLS: LEACHATE TREATMENT BY REVERSE OSMOSIS

Environmental Engineering and Management Journal ◽

10.30638/eemj.2012.286 ◽

2012 ◽

Vol 11 (12) ◽

pp. 2319-2331 ◽

Cited By ~ 8

Author(s):

Maria Gavrilescu ◽

Ana-Maria Schiopu ◽

George Ciprian Piuleac ◽

Corneliu Cojocaru ◽

Ion Apostol ◽

...

Keyword(s):

Reverse Osmosis ◽

Environmental Risk ◽

Leachate Treatment

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Biotower Pilot Study Results for a Photographic and Specialty Paper Manufacturer

Water Science & Technology ◽

10.2166/wst.1992.0673 ◽

1992 ◽

Vol 26 (9-11) ◽

pp. 2109-2112

Author(s):

J. G. Cleary ◽

T. J. Boehm ◽

R. J. Geary

Keyword(s):

New York ◽

Pilot Study ◽

New York State ◽

Cross Flow ◽

Full Scale ◽

Treatment System ◽

Salmon River ◽

Study Results ◽

Comparable Performance ◽

Pollutant Discharge

Schoeller Technical Papers, Inc. (Schoeller), which manufactures photographic and other specialty papers, is located in Pulaski, New York. The wastewater treatment system consists of a primary clarifier and two settling lagoons. Secondary treatment using a biotower was proposed to meet the new New York State Pollutant Discharge Elimination System (SPDES) discharge limits for BOD and TSS. The effluent from each basin is discharged directly to the Salmon River, at an approximate average flow of 1.6 million gallons/day (mgd). A biotower pilot study was performed to evaluate the suitability of a biotower treatment process for treating the total effluent from Schoeller's facility. The pilot study was used to select the media for the full-scale biotower and to confirm the design loading for the full-scale biotower, which proceeded in parallel with the pilot study due to the schedule constraints. Two pilot systems were operated to compare a conventional cross-flow and vertical media. Test data were collected to evaluate the performance of each pilot treatment system at a range of loading conditions and to develop the design loading information for the full-scale plant. The pilot units were operated for a period of 10 months. BOD concentrations to the pilot units averaged 58 mg/l with a peak of 210 mg/l. Approximately 80% of the BOD was soluble. BOD loadings averaged 21 lb BOD/day/1,000 cubic feet with a peak of 77 lb BOD/day/1,000 cubic feet. Both pilot units achieved excellent BOD removals exceeding 75%, with average effluent soluble BOD concentration less than 10 mg/l and average effluent TSS concentrations of 12 mg/l. The two media achieved comparable performance throughout most of the pilot study.

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