scholarly journals Ozonation as a pre-treatment of landfill leachate

2020 ◽  
Vol 15 (6) ◽  
pp. 1
Author(s):  
Leticia Tamara Hoffmann ◽  
Matheus Caneles Batista Jorge ◽  
Adriana Garcia do Amaral ◽  
Milene Carvalho Bongiovani ◽  
Roselene Maria Schneider
Keyword(s):  
Ph Value ◽  
Oxygen Demand ◽  
Organic Content ◽  
Complex Molecules ◽  
Turbidity Removal ◽  
Mato Grosso ◽  
Great Capacity ◽  
Before And After ◽  
Pre Treatment ◽  
High Organic Content

Ozone is an oxidizing agent with a potential for removing complex molecules, including those of difficult microbiological decomposition, such as the molecules found in landfill leachates. This effluent presents high organic content, including recalcitrant molecules. Therefore, this study evaluated the efficiency of ozonation in the treatment of raw leachate at the Primavera landfill, located in Mato Grosso, Brazil. The experiments were carried out using the batch system. The leachate pH value was set at 7 and 10, and the contact times between the gas and the leachate were 20, 40, 60, 80, and 100 minutes. Throughout the study, we analyzed color, turbidity, pH value, chemical oxygen demand (COD), and ultraviolet absorbance at 254 nm (UV abs) of the leachate, both before and after ozonation. Results show that ozonation presented high removal of color, COD and UV abs when pH was 7. In contrast, turbidity removal was higher when the pH value was 10. Regarding contact time, we observed a high removal of color (between 80% and 90%) and UV abs (between 60% and 70%) at 40 minutes, depending on the pH value. Removal was also high for turbidity (approximately 75%) starting at 20 minutes with the pH value at 10, and at 70 minutes with pH at 7. The removal relation within all analyzed parameters (due to ozone consumption) decreased throughout the reaction time. Thus, we concluded that ozonation as a pre-treatment of leachate is indeed satisfactory because of its great capacity for organic material removal.

scholarly journals Sosialisasi Pengelolaan Limbah Dapur Serta Program 3R (Reuse, Reduce, Recycle) Bagi Pemilik Rumah Makan dan Jasa Boga di Wilayah Kota Tasikmalaya

2018 ◽  
Vol 1 (2) ◽  
pp. 53-62
Author(s):  
Melly Mellyanawaty ◽  
Estin Nofiyanti ◽  
A Ibrahim ◽  
N Salman ◽  
N Nurjanah ◽  
...  
Keyword(s):  
Solid Waste ◽  
Energy Requirement ◽  
Organic Content ◽  
Limited Area ◽  
Solid Waste Disposal ◽  
Kitchen Waste ◽  
Egg Shells ◽  
Cooked Food ◽  
Pre Treatment ◽  
High Organic Content

Society services activity in kitchen waste management system has been implemented to the owner of restaurant and catering work in Tasikmalaya City area. This activity has colaborated with Indonesian Catering Associations (APJI). The rapid growth of restaurant and catering activities has created serious problems of energy requirement, water, and solid waste disposal. Less information and limited area become the problems in handling of kitchen waste. A simple technique is needed to overcome the environmental problem which is caused by kitchen waste. The components of kitchen waste include vegetables, peelings, fruit skins, spoilt fruit, cooked and uncooked meat, bones, fats, egg-shells, bread and pastries, cooked food waste, etc. Due to a high organic content, bioconversion technologies such as anaerobic digestion are more suitable to handle the waste convert to biogas. It would be reducing the LPG usage. For the kitchen wastewater, grease trap as pre-treatment followed by a physical and biological process is one of a simple process which can produce the effluent in accordance with government standard. The activities were continued by the socialization of 3R program (reuse, reduce, recycle) by doing demo utilization of kitchen solid waste such as packing material, mineral water bottle is made a handicraft. Knowledge transfer run well and the enthusiasm of the participants in following the activity were very good.

Treatment of waste thermal waters by ozonation and nanofiltraton

2013 ◽  
Vol 67 (6) ◽  
pp. 1272-1279 ◽  
Author(s):  
Z. L. Kiss ◽  
A. Szép ◽  
S. Kertész ◽  
C. Hodúr ◽  
Z. László
Keyword(s):  
Membrane Fouling ◽  
Membrane Filtration ◽  
Membrane Separation ◽  
Oxygen Demand ◽  
Organic Content ◽  
Ozone Treatment ◽  
Thermal Waters ◽  
Toxic Compounds ◽  
Ozone Pretreatment ◽  
High Organic Content

After their use for heating, e.g. in greenhouses, waste thermal waters may cause environmental problems due to their high contents of ions, and in some cases organic matter (associated with an oxygen demand) or toxic compounds. The aims of this work were to decrease the high organic content of waste thermal water by a combination of ozone treatment and membrane separation, and to investigate the accompanying membrane fouling. The results demonstrated that the chemical oxygen demand and the total organic content can be effectively decreased by a combination of ozone pretreatment and membrane filtration. Ozone treatment is more effective for phenol elimination than nanofiltration alone: with a combination of the two processes, 100% elimination efficiency can be achieved. The fouling index b proved to correlate well with the fouling and polarization layer resistances.

Efficacy of an appropriate point-of-use water treatment intervention for low-income communities in India utilizing Moringa oleifera, sari-cloth filtration and solar UV disinfection

2011 ◽  
Vol 1 (2) ◽  
pp. 112-123 ◽  
Author(s):  
Syed Imran Ali ◽  
Morgan MacDonald ◽  
J. Jincy ◽  
K. Arun Sampath ◽  
G. Vinothini ◽  
...  
Keyword(s):  
Water Treatment ◽  
Low Income ◽  
Moringa Oleifera ◽  
Microbiological Quality ◽  
Oxygen Demand ◽  
Organic Content ◽  
Coliform Bacteria ◽  
Most Probable Number ◽  
Probable Number ◽  
Pre Treatment

This study investigated the efficacy of a POU water treatment system featuring sari-cloth filtration and/or Moringa oleifera coagulation as pre-treatments for solar disinfection (SODIS). Surface water from a peri-urban slum in Chennai, India, was treated and analysed for turbidity, organic content via chemical oxygen demand (COD) and microbiological quality via most probable number (MPN) enumeration of total coliforms. Pre-treatment with both moringa coagulation and sari-cloth filtration significantly improved the turbidity of raw water compared to no pre-treatment controls (P = 0.0002). Optimal moringa coagulation did not outperform sari-cloth filtration (P = 0.06), but combining optimal moringa coagulation with sari-cloth filtration significantly outperformed either pre-treatment independently with respect to turbidity (P = 0.016 and P = 0.0001, respectively). The addition of moringa was found to increase COD in treated water, with greater doses of moringa resulting in higher COD levels (P = 0.04). Increased organics may have encouraged the re-growth of coliform bacteria that was observed in those jars receiving moringa coagulant such that, with respect to MPN, those jars which were subject to optimal moringa coagulation did not outperform those undergoing sari-cloth filtration alone (P = 0.41). Sari-cloth filtration is recommended as a pre-treatment for SODIS whereas moringa is not, as further investigation on the relationship between organics and bacterial re-growth is necessary.

scholarly journals A comparison of alum sludge with peat for aqueous glyphosate removal for maximizing their value for practical use

2018 ◽  
Vol 2017 (2) ◽  
pp. 450-456 ◽  
Author(s):  
Yae Wang ◽  
Baiming Ren ◽  
Yaqian Zhao ◽  
Anthony English ◽  
Martin Cannon
Keyword(s):  
Aqueous Solution ◽  
Oxygen Demand ◽  
Full Potential ◽  
Removal Capacity ◽  
Before And After ◽  
Alum Sludge ◽  
Pre Treatment ◽  
Physical And Chemical ◽  
Better Than ◽  
P Removal

Abstract This study compares and contrasts the glyphosate removal efficiency of alum sludge (waterworks residue) and Irish peat in aqueous solution. Organic phosphonate of glyphosate aqueous solution was removed in pot tests separately filled with peat and alum sludge, while effluent samples were taken from each pot to analyse the concentration of phosphorus (P) and COD (chemical oxygen demand); physical and chemical analysis for both media before and after use was carried out subsequently. The results show that the P removal capacity of alum sludge was significant (>99%), while the removal capacity of peat was considerably less than 10% after 10 weeks. Both materials significantly reduced the levels of COD, but it was noted that peat had a marginally greater initial P removal capacity (68 ± 22%) and did perform better than alum sludge (57 ± 12%). Moreover, pre-treatment is a crucial step to harness the full potential of peat. Overall, this study provides a scientific clue for sorbents selection when considering alum sludge and peat to maximize their value in practice.

scholarly journals The Energy Production and Efficiency Treatment of ML-MFC Using High Organic Content Wastewater

2020 ◽  
Vol 202 ◽  
pp. 10006
Author(s):  
Aris Mukimin
Keyword(s):  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Flow Rate ◽  
Gas Diffusion ◽  
Organic Content ◽  
Carbon Cloth ◽  
Complex Character ◽  
Before And After ◽  
Current Production ◽  
High Organic Content

Microbial fuel cell (MFC) is a technology that is not only able to produce energy but also treats wastewater. The membraneless microbial fuel cell (ML-MFC) system was developed to avoid the use of membranes that are prone to clogging and are less applicable. The reactor was made and arranged in two chambers connected by pipes and the fluid flow rate is set using a peristaltic pump. Three anodes (carbon cloth) were paired with a carbon-Pt cathode GDL (Gas Diffusion Layer) type. The reactor was applied to wastewater taken from the industrial WWTP unit at the point before and after UASB. ML-MFC reactors can produce currents of 0.2 mA (before UASB) and 0.25 mA (after UASB). Current production is strongly influenced by the flow rate and characteristics of wastewater. Increased flow rates and complex character of wastewater will reduce current production. The electric power produced is 0.035 mwatt for wastewater before UASB and 0.086 mwatt after UASB with a COD removal is close to the same, which is 21% at a flow rate of 11 L / min1

Confectionery industry: a case study on treatability-based effluent characterization and treatment system performance

2012 ◽  
Vol 66 (1) ◽  
pp. 15-20 ◽  
Author(s):  
H. Ozgun ◽  
N. Karagul ◽  
R. K. Dereli ◽  
M. E. Ersahin ◽  
T. Coskuner ◽  
...  
Keyword(s):  
Biogas Production ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Granular Sludge ◽  
Organic Content ◽  
Stream Segregation ◽  
Pre Treatment ◽  
High Concentrations ◽  
And Performance

Source-based wastewater characterization and stream segregation provide effective management of industrial wastewaters. The characterization of wastewater sources from a confectionery factory was presented and performance of the wastewater treatment plant was evaluated in this study. All of the wastewater sources in the factory, except the vacuum water line, can be characterized by high concentrations of soluble pollutants and low pH. High organic content of the wastewater generated from the confectionery industry promoted the application of anaerobic technology as a pre-treatment before the conventional aerobic treatment. The average chemical oxygen demand (COD) removal and biogas production for expanded granular sludge bed reactor were 88% and 1,730 Nm3/day, respectively. The effluent from the investigated facility can be used for irrigation provided that conductivity values are within acceptable limits.

Characterisation of medical-waste sterilisation-plant wastewater and a preliminary study of coagulation–flocculation treatment options

2010 ◽  
Vol 62 (2) ◽  
pp. 266-272 ◽  
Author(s):  
O. Özkan ◽  
H. Mıhçıokur ◽  
Ş. T. Azgın ◽  
Ö. Özdemir
Keyword(s):  
Ferric Chloride ◽  
Ph Value ◽  
Treatment Options ◽  
Oxygen Demand ◽  
Medical Waste ◽  
Municipal Sewage ◽  
Nitrogen And Phosphorus ◽  
Aluminium Sulfate ◽  
Coagulant Dosage ◽  
Pre Treatment

Wastewater from a medical-waste sterilisation plant (MWSP) contains unique pollutants and requires on-site treatment to prevent contamination of the municipal sewage system and receiving water bodies. Therefore, to meet the prescribed discharge standards and comply with the legal regulations, pre-treatment must be applied to MWSP wastewater. In this study, the capabilities of coagulation–flocculation processes were investigated for MWSP wastewater treatment. Processes using ferric chloride, ferrous sulfate and aluminium sulfate as coagulants were characterised. During the coagulation experiments, seven different coagulant dosages and four different pH values were evaluated to determine the optimum coagulant dosage and pH value. The highest removal efficiency of chemical oxygen demand (COD) was obtained using 300 mg/L of ferric chloride at pH 10. A COD removal of about 60% as well as considerable reductions in the amounts of suspended solids, nitrogen and phosphorus were realised.

State of the Art Review on Landfill and Leachates Treatment in China

2011 ◽  
Vol 347-353 ◽  
pp. 2078-2084
Author(s):  
Chen Yan Hu
Keyword(s):  
Solid Waste Management ◽  
Ph Value ◽  
Oxygen Demand ◽  
Ammonia Nitrogen ◽  
Suspended Solid ◽  
Municipal Solid Waste Management ◽  
Chemical Treatments ◽  
Pre Treatment ◽  
Engineering Practices ◽  
Physical And Chemical

The main objectives of this study were to describe the municipal solid waste management, leachate characteristics of China landfills, and to summarize the present research of leachate treatments in china such as biological treatment, physical and chemical treatment and land treatment. In the survey of leachate from landfill in Chinese megapolis, the quality is characterized by chemical oxygen demand (COD) of 1500-80000 mg/L, biochemical oxygen demand (BOD) of 200-35000 mg/L, ammonia nitrogen (NH3-N) of 50-2400 mg/L, total nitrogen of 80-2600 mg/L, suspended solid of 30-7000 mg/L and pH value of 5-7.8. In engineering practices of China, the biological systems are usually adopted. Meanwhile, as far as the special quality of leachate is concerned, some chemical treatments are used as the pre-treatment or post-treatment to promote the effluent or improve the biological degradability of leachate.

scholarly journals The Energy Production and Efficiency Treatment of ML-MFC Using High Organic Content Wastewater

2020 ◽  
Vol 202 ◽  
pp. 10005
Author(s):  
Aris Mukimin
Keyword(s):  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Flow Rate ◽  
Gas Diffusion ◽  
Organic Content ◽  
Carbon Cloth ◽  
Complex Character ◽  
Before And After ◽  
Current Production ◽  
High Organic Content

Microbial fuel cell (MFC) is a technology that is not only able to produce energy but also treats wastewater. The membraneless microbial fuel cell (ML-MFC) system was developed to avoid the use of membranes that are prone to clogging and are less applicable. The reactor was made and arranged in two chambers connected by pipes and the fluid flow rate is set using a peristaltic pump. Three anodes (carbon cloth) were paired with a carbon-Pt cathode GDL (Gas Diffusion Layer) type. The reactor was applied to wastewater taken from the industrial WWTP unit at the point before and after UASB. ML-MFC reactors can produce currents of 0.2 mA (before UASB) and 0.25 mA (after UASB). Current production is strongly influenced by the flow rate and characteristics of wastewater. Increased flow rates and complex character of wastewater will reduce current production. The electric power produced is 0.035 mwatt for wastewater before UASB and 0.086 mwatt after UASB with a COD removal is close to the same, which is 21% at a flow rate of 11 L / min1

scholarly journals Treatment of leachate by combining PAC and UV/O3 processes

2012 ◽  
Vol 3 (1) ◽  
pp. 38-42 ◽  
Author(s):  
Huu Tap Van ◽  
Van Tuyen Trinh ◽  
Xuan Hien Dang
Keyword(s):  
Reaction Time ◽  
Removal Efficiency ◽  
Ph Value ◽  
Oxygen Demand ◽  
Experimental Investigations ◽  
Colour Removal ◽  
Treatment Stage ◽  
Pre Treatment ◽  
Optimal Reaction

The landfill leachate is commonly treated for non-biodegradable organic matters, ammonia and colour. Experimental investigations using polyaluminium chlorite (PAC) and UV/O3 have been conducted for the determination of optimal pH value, reaction time and PAC concentration for the removal of chemical oxygen demand (COD) and colour. In pre-treatment coagulation stages, the highest COD and colour removal efficiencies were observed at the concentration of PAC ≥ 3,000 mglG1 and pH values between 7 and 8. However, these experiments also indicated significant removal efficiency for PAC starting with concentrations of 1,500 mglG1. The efficiency of COD and colour removal were approximately 30% and 70%, respectively. Similar efficiencies have been observed also during the second treatment stage where UV/O3 processes were used to treat coagulated leachate. After UV/O3 application, the pH of leachate reached the optimum value of 7.5 whereas the highest COD and colour removal efficiency was 55% and 72%, respectively, and the optimal reaction time was achieved after 80 min. Nước rỉ rác sinh ra từ bãi chôn lấp chất thải rắn cần được xử lý các thành phần chất hữu cơ khó phân hủy sinh học, xử lí amoni và độ màu. Một số kết quả thử nghiệm về xử lý COD và màu của nước rỉ rác bằng việc sử dụng phương pháp keo tụ vớiPAC và quá trình UV/O3 đã được thực hiện cùng với việc xác định các giá trị pH tối ưu, thời gian phản ứng và nồng độ PAC tối ưu. Hiệu suất xử lý cao nhất đạt được khi nồng độ của PAC ≥ 3.000 mg/l, pH trong khoảng từ 7 đển 8 trong giai đoạn tiền xửlý. Tuy nhiên, hiệu quả loại bỏ COD và màu bắt đầu tăng rõ khi nồng độ PAC từ 1.500 mg/l trở lên. Hiệu quả loại bỏ COD và màu tương ứng là khoảng 30% và 70%. Các giá trị pH này phù hợp cho quá trình phản ứng UV/O3 được sử dụng sau giai đoạn keo tụ. Sau quá trình xử lý bằng hệ UV/O3, pH của nước rỉ rác tối ưu được xác định là 7,5 (hiệu suất xử lý COD và màu cao nhất tương ứng là 55% và 72%), thời gian phản ứng tối ưu là 80 phút.

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