نتایج جستجو برای: high removal efficiency of chemical oxygen demand cod

تعداد نتایج: 21385568  

Introduction and purpose: Currently, leachate production and its management are major environmental problems associated with the operation of solid waste landfill. Herein, we sought to evaluate the efficiency of combined processes of coagulation and modified activated bentonite with sodium hydroxide as abiosorbent in the final treatment of leachate. Methods: This experimenta...

2015
Yu Rong

Pharmaceutical wastewaters are generated through complex manufacturing processes that contain a variety of organic and inorganic constituents, and are usually characterized by a high concentration of chemical oxygen demand (COD), suspended solids, dissolved solids (salts), toxicity, and refractory compounds. Therefore, it must be treated. The treatment of a pharmaceutical wastewater (PWW) using...

2012
Hee-Jeong Choi Seung-Mok Lee

The aim of this paper is to evaluate the efficiency of nutrients removal by Chlorella vulgaris (C. vulgaris). The study is comprised of five different fractions, having different quantities of C. vulgaris. From the batch reactor operations it was observed that increasing the content of C. vulgaris in the wastewater caused an apparent increase of removal rates in biochemical oxygen demand (BOD),...

In this research, photocatalytic degradation method has been introduced to clean up Spent Caustic of Olefin units of petrochemical industries (neutralized Spent Caustic by means of sulfuric acid) in the next step, adaptable method and effective parameters in the process performance have been investigated. Chemical oxygen demand (COD) was measured by the commercial zinc oxide that synthesized wi...

Raheleh Kujlu, Mehdi Ahmadi , Nemat Alah Jaafarzadeh Haghighi Fard , Sahand Jorfi , Samaneh Mirali,

Background: Mature landfill leachate is a complicated mixture which is resistant to biological treatment processes. The treatment of mature landfill leachate by struvite precipitation and Fenton oxidation was the main objective of the current research. Methods: Struvite with the phosphate/ammonia/magnesium molar ratio of 1/1/1.05 was considered during all experiments. Five initial pHs of 3, 4,...

باقری, مرضیه, صیدمحمدی, عبدالمطلب, عسگری, قربان, چاوشی, سونیا,

Introduction: Textile industries, due to a high volume of wastewater and harmful environmental factors such as a variety of dyes, are significant industries in industrial wastewaters treatment. So, the aim of this study was to examine the efficiency of dye removal from the textile industry wastewater using the titanium dioxide photocatalytic process under UV-LED light irradiation (UV-LED/TiO2) ...

2016
Mabrouk Ben Brahim Hafedh Belhadj Ammar Ridha Abdelhédi

−The removal of pesticides from water is a major environmental concern. This study investigates the electrochemical removal of the insecticide imidacloprid (IMD) from aqueous solutions on a boron-doped diamond (BDD) and Ta/PbO2 anodes under galvanostatic electrolysis. The influence of operating parameters, such as applied current density (50-100 mA cm), initial chemical oxygen demand COD (0) (2...

2006
Hector A. Moreno David L. Cocke Jewel J. A. Gomes

Electrocoagulation (EC) is electrochemical water and wastewater treatment technology which in its simplest form uses an electrochemical cell where a dc voltage is applied to the electrodes, usually made of Iron or Aluminum, and the electrolyte is the water or wastewater. Current theory of EC has not been able to explain all the phenomena associated with the process, among others the differences...

Journal: Journal of Nanoanalysis 2019

In this study, α-Fe2O3 nano-spheres are immobilized on the surface of manganese pyrophosphate(Mn2P2O7) support using forced hydrolysis and reflux condensation (FHRC) method. The synthesizedα-Fe2O3/Mn2P2O7 were characterized by FTIR, SEM, BET EDX, and XRD. The photocatalytic activity fromα-Fe2O3/Mn2P2O7 was investigated for the removal of toluene in aqueous solution by UV/H2O2 ...

2017
Hailiang Song Shuai Zhang Xizi Long Xiaoli Yang Hua Li Wenli Xiang

Constructed wetland-coupled microbial fuel cell systems (CW-MFCs) incorporate an aerobic zone and an anaerobic zone to generate electricity that achieves the oxidative degradation of contaminants. However, there are few reports on the performance of such coupled systems. In this study, we determined the optimal configuration of CW-MFCs to characterize their electricity generation performance. B...

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