scholarly journals Electro-oxidation of fish meal industry wastewater in a stirred batch reactor using a Ti/RuO2 anode

2021 ◽  
Vol 16 (4) ◽  
pp. 1488-1497
Author(s):  
Raju Meganathan ◽  
Rajagopalan Varadarajan
Keyword(s):  
Fish Meal ◽  
Batch Reactor ◽  
Organic Pollutant ◽  
Ruthenium Oxide ◽  
Pollutant Removal ◽  
Color Removal ◽  
Electrode Spacing ◽  
Mechanical Agitation ◽  
Electro Oxidation ◽  
Industry Effluent

Abstract Fish meal is used as feed for fish, dogs and cats, and in the pharmaceutical industry. Direct electro-oxidation has been used to treat fish meal industry effluent and organic pollutant removal, and was studied in this project. The anode used was titanium coated with ruthenium oxide and the cathode was stainless steel. In addition to organic pollutants, color removal was also studied. The varying parameter was current density, and those used were 10, 20, 27, and 34 mA/cm2. The effects of mechanical agitation and the inter-electrode distance on pollutant removal were also studied. The highest TOC and color removal (both 82%) were achieved at 34 mA/cm2, using mechanical agitation with 1.5 cm electrode spacing. Without agitation, TOC removal efficiency was 72%. The results show that electro-oxidation can be an effective secondary treatment for fish meal industry effluent.

scholarly journals Treatment of Combined Dairy and Domestic Wastewater with Constructed Wetland System in Sicily (Italy). Pollutant Removal Efficiency and Effect of Vegetation

Water ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1086
Author(s):  
Mario Licata ◽  
Roberto Ruggeri ◽  
Nicolò Iacuzzi ◽  
Giuseppe Virga ◽  
Davide Farruggia ◽  
...  
Keyword(s):  
Plant Growth ◽  
Organic Compounds ◽  
Removal Efficiency ◽  
Constructed Wetland ◽  
Organic Pollutant ◽  
Dairy Farm ◽  
Domestic Wastewater ◽  
Pollutant Removal ◽  
Dairy Wastewater ◽  
Giant Reed

Dairy wastewater (DWW) contains large amounts of mineral and organic compounds, which can accumulate in soil and water causing serious environmental pollution. A constructed wetland (CW) is a sustainable technology for the treatment of DWW in small-medium sized farms. This paper reports a two-year study on the performance of a pilot-scale horizontal subsurface flow system for DWW treatment in Sicily (Italy). The CW system covered a total surface area of 100 m2 and treated approximately 6 m3 per day of wastewater produced by a small dairy farm, subsequent to biological treatment. Removal efficiency (RE) of the system was calculated. The biomass production of two emergent macrophytes was determined and the effect of plant growth on organic pollutant RE was recorded. All DWW parameters showed significant differences between inlet and outlet. For BOD5 and COD, RE values were 76.00% and 62.00%, respectively. RE for total nitrogen (50.70%) was lower than that of organic compounds. RE levels of microbiological parameters were found to be higher than 80.00%. Giant reed produced greater biomass than umbrella sedge. A seasonal variation in RE of organic pollutants was recorded due to plant growth rate Our findings highlight the efficient use of a CW system for DWW treatment in dairy-cattle farms.

scholarly journals Organic pollutant removal from edible oil process wastewater using electrocoagulation

2018 ◽  
Vol 142 ◽  
pp. 012079 ◽  
Author(s):  
S Sharma ◽  
O T Can ◽  
M Hammed ◽  
D Nawarathna ◽  
H Simsek
Keyword(s):  
Organic Pollutant ◽  
Edible Oil ◽  
Pollutant Removal ◽  
Process Wastewater

scholarly journals Pollutant removal in subsurface wastewater infiltration systems with/without intermittent aeration under different organic pollutant loadings

Water SA ◽  
2016 ◽  
Vol 42 (4) ◽  
pp. 595 ◽  
Author(s):  
Hexin Fei ◽  
Deli Tong ◽  
Jing Pan ◽  
Yang Zhang ◽  
Linli Huang ◽  
...  
Keyword(s):  
Organic Pollutant ◽  
Pollutant Removal ◽  
Intermittent Aeration

A review on the application of perovskite as peroxymonosulfate activator for organic pollutant removal

2021 ◽  
pp. 107093
Author(s):  
Pooi-Ling Koo ◽  
Nur Farhana Jaafar ◽  
Pow-Seng Yap ◽  
Wen-Da Oh
Keyword(s):  
Organic Pollutant ◽  
Pollutant Removal

scholarly journals Electrochemical oxidation as a post treatment for biologically tannery wastewater in batch reactor

2019 ◽  
Vol 80 (7) ◽  
pp. 1326-1337 ◽  
Author(s):  
Tran Le Luu ◽  
Djeuga Djeuga Franck Stephane ◽  
Nguyen Hoang Minh ◽  
Nguyen Duc Canh ◽  
Bui Xuan Thanh
Keyword(s):  
Energy Consumption ◽  
Electrochemical Oxidation ◽  
Organic Compounds ◽  
Current Density ◽  
Batch Reactor ◽  
Post Treatment ◽  
Pollutant Removal ◽  
Tannery Wastewater ◽  
Stirring Rate ◽  
A Current

Abstract Tannery wastewater is known to contain high concentrations of organic compounds, heavy metals, nitrogen, sulphur, chromium, and many other chemicals. Both aerobic and anaerobic biological approaches have proven ineffective in the treatment of tannery wastewater due to the high salinity and toxic chemicals contained within the medium. Electrochemical oxidation presents a promising method for solving this problem. High pollutant removal efficiency, low energy consumption, and high electrode stability are three important factors supporting the feasibility of an efficient electrochemical treatment process. In the present study, electrochemical oxidation was performed as a post treatment for tannery wastewater (after biological pre-treatment) in a batch reactor using Ti/RuO2, Ti/IrO2, and Ti/BDD anodes. The effects of pH, current density, stirring rate and treatment time were studied to assess the treatment efficiency as well as the energy consumption of the process. The results showed that colour, chemical oxygen demand (COD), total organic carbon (TOC), and total nitrogen (TN) removal efficiencies on the electrodes were: Ti/RuO2 (88.8%, 88.40%, 64.0%, 96.4%), Ti/IrO2 (85.40%, 85.9%, 52.3%, 51.4%), Ti/BDD (90.60%, 94.7%, 90.5%, 82.7%) respectively, at a current density of 80 mA/cm2. All three electrodes demonstrated optimal performance at a pH of 8, a stirring rate of 400 rpm, a current density of 80 mA/cm2, and an electrolysis time of 5 h. The concentration of tri-chloromethane by-product was detected with limiting value. Electrochemical oxidation thus offers a feasible method for removing organic compounds and nutrients from tannery wastewater.

scholarly journals Elevated tropospheric CO2 and O3 concentrations impair organic pollutant removal from grassland soil

2018 ◽  
Vol 8 (1) ◽  
Author(s):  
Fuxun Ai ◽  
Nico Eisenhauer ◽  
Alexandre Jousset ◽  
Olaf Butenschoen ◽  
Rong Ji ◽  
...  
Keyword(s):  
Organic Pollutant ◽  
Pollutant Removal ◽  
Grassland Soil
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