scholarly journals PERFORMANCE OF ULTRASONIC WAVE AND H2O2 AS AN ADVANCED OXIDATION PROCESS IN PRE-TREATMENT OF LANDFILL LEACHATE USING AERATED BIOFILTER

2020 ◽  
Vol 58 (5A) ◽  
pp. 1
Author(s):  
Tuan Van Le
Keyword(s):  
Ultrasonic Wave ◽  
Landfill Leachate ◽  
Advanced Oxidation Process ◽  
Oxidation Process ◽  
Treatment Time ◽  
Advanced Oxidation ◽  
Synthetic Wastewater ◽  
Short Treatment ◽  
Batch Mode ◽  
Pre Treatment

This work presents batch mode experiments of combination ultrasonic wave (USW) and H2O2 in pre-treatment of landfill leachate. Additionally, in continuous mode experiments, a modified aerated bio-filter (ABF) was designed for the treatment of synthetic wastewater and the leachate (after treatment by USW/H2O2), with the stepwise increasing the volume ratios between the leachate and synthetic wastewater up to 100% of the leachate. The leachate was collected from Thuy Phuong landfill in Thua Thien Hue province, Vietnam, with characterized of color: 14,213 ± 150 PCU (n=3), N-NH4: 1213 ± 148 mg/L (n = 3), COD: 6068 ± 1611 mg/L (n = 3), BOD5: 1211 ± 158 mg/L (n=3), BOD5/COD: ~0.21 and pH ~7.7. The USW/H2O2 had shown a great potential to remove COD, N-NH4 and color of the raw leachate in short treatment time (5 mins). The ABF system was well operated with organic loads (0.26 to 1.13 kg-COD/m3/d), with a very small sludge volume was formed. Moreover, the presence H2O2 can be used for decreasing odor of the leachate. As “green” advanced oxidation process (AOPs), the combination of USW/H2O2 could be used to improve the effectiveness of activated sludge process in treatment of refractory compounds from landfill leachate.

Toxicity elimination of landfill leachate by hybrid processing of advanced oxidation process and adsorption

2017 ◽  
Vol 8 ◽  
pp. 246-255 ◽  
Author(s):  
Cláudia Regina Klauck ◽  
Alexandre Giacobbo ◽  
Christian Gabriel Altenhofen ◽  
Luciano Basso Silva ◽  
Alvaro Meneguzzi ◽  
...  
Keyword(s):  
Landfill Leachate ◽  
Advanced Oxidation Process ◽  
Oxidation Process ◽  
Advanced Oxidation

scholarly journals Evaluation of Advanced Chemical Oxidation Process for the Pretreatment of Mixed Agro-Food Industrial Wastewater in Nablus, Palestine

2020 ◽  
Author(s):  
Saja Younis ◽  
Rashed Al-Sa`ed
Keyword(s):  
Advanced Oxidation Process ◽  
Oxidation Process ◽  
Advanced Oxidation ◽  
Chemical Oxidation ◽  
Decision Makers ◽  
High Rate ◽  
Food Industries ◽  
Acidic Conditions ◽  
Pre Treatment ◽  
Wastewater Samples

This study investigated the reduction of organic loads from mixed agro-food industrial wastewaters (dairy and slaughterhouse) of Nablus city using advanced oxidation process (AOP), a high- rate chemical oxidation reaction. Bench-scale Jar tests using an advanced oxidation process (AOP) were performed as a pretreatment stage. Direct applications of classical Fenton’s process on mixed raw agro-food wastewater samples (COD: 15400-18200 mg/l) revealed unsatisfactory results. The performance of the Fenton process was evaluated using three mixed samples with different pre-treatment trials: (A) coagulant (FeCl3.6H2O) addition, (B) settling (2h) allowed, and use of flocculent (lime Ca(OH)2) in sample (C). Compared with other partial treatments, sample (C), Fenton`s process lime preceded, was the most effective in the removal of organic (89% COD; 80% TKN) and inorganic loads (91% TSS; 62% TS) under H2O2/COD (w/w ratio 2:1), H2O2/Fe+2 (w/w ratio 10:1) and acidic conditions (pH =3). Obtained results comply with Nablus municipal by-law (COD below 2000 mg/l), which help decision-makers within the agro-food industries install pollution reduction systems. Investment in the Fenton-based peroxidation process, allow agro-food industries to obtain connection permits to sewage networks.

scholarly journals Combined homogeneous and heterogeneous advanced oxidation process for the treatment of tannery wastewaters

2015 ◽  
Vol 6 (1) ◽  
pp. 59-71 ◽  
Author(s):  
G. Selvabharathi ◽  
S. Adishkumar ◽  
S. Jenefa ◽  
G. Ginni ◽  
J. Rajesh Banu ◽  
...  
Keyword(s):  
Advanced Oxidation Process ◽  
Oxidation Process ◽  
Treatment Time ◽  
Initial Level ◽  
Degradation Kinetics ◽  
Oxygen Demand ◽  
Advanced Oxidation ◽  
Experimental Conditions ◽  
Optimization Study ◽  
Effective Removal

This study investigated the practical application of combined advanced oxidation processes (AOPs), such as homogeneous TiO2 photocatalysis and heterogeneous photo-Fenton, for the treatment of tannery wastewaters. An optimization study was conducted on the photocatalytic degradation of tannery wastewaters, in order to understand the effects of different operating parameters on the degradation kinetics. The chemical oxygen demand of tannery wastewater decreased from an initial level of 3,400 mg/L in raw wastewater to 140 mg/L (96% removal) in wastewater treated by the combined advanced oxidation process at optimum pH 7, TiO2 dosage of 0.2 g/L, Fe2+ dosage of 0.5 g/L, H2O2 dosage of 1.8 g/L and a treatment time of 4 hours. The biodegradability of wastewater increased from an initial level of 0.4 to 0.7 after treatment under optimum experimental conditions at a treatment time of 60 min. An annual treatment cost of US$21.34/m3 of treated water was obtained. The combined advanced oxidation process proved to be an efficient and appropriate technique for the effective removal of complex organic compounds in industrial wastewater.

scholarly journals DEGRADATION OF GLYPHOSATE HERBICIDE BY AN ANODIC OXIDATION PROCESS

2018 ◽  
Vol 55 (4C) ◽  
pp. 231
Author(s):  
Thanh Son Le
Keyword(s):  
Anodic Oxidation ◽  
Advanced Oxidation Process ◽  
Oxidation Process ◽  
Treatment Time ◽  
Batch Mode ◽  
Water Contaminants ◽  
Synthetic Solution ◽  
Glyphosate Herbicide ◽  
Glyphosate Degradation ◽  
Anodic Oxidation Process

Glyphosate is occasionally detected as water contaminants in agriculture areas where the herbicide is used extensively. The removal of glyphosate in synthetic solution using advanced oxidation process (AOP) is a possible approach for remediation of contaminated waters. Here, the ability of anodic oxidation for the degradation and mineralisation of glyphosate herbicide was investigated using Ti/PbO2 anode in batch mode. The experimental results provided that the current intensity, treatment time, pH and initial concentration are the influent parameters on the glyphosate degradation. At the optimal condition, 16.9 mgL−1 of glyphosate decreased up to 0.6 mg L−1, i.e the removal efficiencies were 95 ± 16 %. This work demonstrates that electrochemical oxidation is a promising process for degradation and mineralization of glyphosate.

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