scholarly journals Mengolah COD Pada Limbah Laboratorium

2019 ◽  
Vol 1 (2) ◽  
pp. 22-31
Author(s):  
Yenita Sandra Sari
Keyword(s):  
Advanced Oxidation Processes ◽  
Liquid Waste ◽  
Oxygen Demand ◽  
Optimum Dose ◽  
Fenton Reagent ◽  
Industrial Activities ◽  
Oxidation Processes ◽  
Laboratory Waste ◽  
Very High ◽  
High Diversity

Laboratory liquid waste is water produced from the rest of the testing activities in a laboratory that is categorized as dangerous. This waste has a distinctive characteristic that is different from the waste originating from industrial activities because it usually has a very high diversity of types of waste even though the amount of material disposed of is relatively small. Advance Oxidation Processes (AOPs) or advanced oxidation processes are an alternative method that is suitable to be used to treat laboratory waste. This study aims to obtain the optimum dose in decreasing the concentration of Chemical Oxygen Demand (COD) with the AOPs method using Fenton reagent (H2O2 and FeSO4). The study used variations in COD concentrations of 10,090.09 mg/L, 5,009.01 mg/L and 511.71 mg/L. The results showed that the optimum dose of Fenton reagent was 1: 300 with the efficiency of decreasing COD levels for COD concentrations of 10,090.09 mg/L by 21.43%, for COD concentrations of 5,009.01 mg/L of 46.76% and for COD concentrations of 511 , 71 mg/L of 83.10%.

Pengolahan Air Limbah Laboratorium Menggunakan Metode AOPs (ADVANCED OXIDATION PROCESSES) Dengan Pereaksi Fenton (H2O2 dan FeSO4) Pada Skala Batch

2018 ◽  
Author(s):  
Gede H Cahyana
Keyword(s):  
Industrial Wastewater ◽  
Advanced Oxidation Processes ◽  
Biological Process ◽  
Oxygen Demand ◽  
Advanced Oxidation ◽  
Optimum Dose ◽  
Fenton Reagent ◽  
Oxidation Processes ◽  
Low Concentrations ◽  
Reduction Efficiency

Laboratory wastewater was derived from analytical activities in the laboratory and grouped to hazardous waste. It was different from hazardous industrial wastewater because of many different pollutants. The composition of its dangerous substances was not easy to be processed by biological process. Therefore, chemical method was tried, namely Advanced Oxidation Processes (AOPs). The optimum dose of Fenton (H2O2 and FeSO4) reagent was the purpose to reduce the concentration of Chemical Oxygen Demand (COD). Variations applied were COD concentrations, which were 10,090,09 mg / L, 5.009,01 mg / L and 511,71 mg / L with varied reagen. The optimum dose of Fenton reagent was obtained 1: 300 with COD reduction efficiency as follows: COD concentration 10,090,09 mg / L = 21,43%, COD concentration 5.009,01 mg / L = 46,76% and concentration of COD 511,71 mg / L = 83,10%. The results suggested that Fenton could to reduce COD concentration up to 80% in relatively low concentrations. Keywords: laboratory wastewater, Fenton, COD, batch

Degradation and changes in toxicity and biodegradability of tetracycline during ozone/ultraviolet-based advanced oxidation

2014 ◽  
Vol 70 (7) ◽  
pp. 1229-1235 ◽  
Author(s):  
Huyen Trang Luu ◽  
Kisay Lee
Keyword(s):  
Escherichia Coli ◽  
Biological Treatment ◽  
Advanced Oxidation Processes ◽  
Vibrio Fischeri ◽  
Oxygen Demand ◽  
Advanced Oxidation ◽  
Uv Treatment ◽  
Experimental Conditions ◽  
Oxidation Processes ◽  
Complete Mineralization

Advanced oxidation processes (AOPs) composed of O3, H2O2 and ultraviolet (UV) were applied to degrade tetracycline (TC). Degradation efficiency was evaluated in terms of changes in absorbance (ABS) and total organic carbon (TOC). The change in biotoxicity was monitored with Escherichia coli and Vibrio fischeri. The improvement in biodegradability during oxidation was demonstrated through 5-day biochemical oxygen demand/chemical oxygen demand ratio and aerobic biological treatment. The combination of O3/H2O2/UV and O3/UV showed the best performance for the reductions in ABS and TOC. However, mineralization and detoxification were not perfect under the experimental conditions that were used in this study. Therefore, for the ultimate treatment of TC compounds, it is suggested that AOP treatment is followed by biological treatment, utilizing enhanced biodegradability. In this study, aerobic biological treatment by Pseudomonas putida was performed for O3/UV-treated TC. It was confirmed that O3/UV treatment improved TOC reduction and facilitated complete mineralization in biological treatment.

scholarly journals Advanced Oxidation Processes and Biotechnological Alternatives for the Treatment of Tannery Wastewater

Molecules ◽  
2021 ◽  
Vol 26 (11) ◽  
pp. 3222
Author(s):  
Néstor Andrés Urbina-Suarez ◽  
Fiderman Machuca-Martínez ◽  
Andrés F. Barajas-Solano
Keyword(s):  
Advanced Oxidation Processes ◽  
Liquid Waste ◽  
Value Added ◽  
Advanced Oxidation ◽  
Tannery Wastewater ◽  
Economic Sectors ◽  
Oxidation Processes ◽  
Physicochemical Composition ◽  
The Impact ◽  
Alternative Solutions

The tannery industry is one of the economic sectors that contributes to the development of different countries. Globally, Europe and Asia are the main producers of this industry, although Latin America and Africa have been growing considerably in recent years. With this growth, the negative environmental impacts towards different ecosystem resources as a result of the discharges of recalcitrated pollutants, have led to different investigations to generate alternative solutions. Worldwide, different technologies have been studied to address this problem, biological and physicochemical processes have been widely studied, presenting drawbacks with some recalcitrant compounds. This review provides a context on the different existing technologies for the treatment of tannery wastewater, analyzing the physicochemical composition of this liquid waste, the impact it generates on human health and ecosystems and the advances in the different existing technologies, focusing on advanced oxidation processes and the use of microalgae. The coupling of advanced oxidation processes with biological processes, mainly microalgae, is seen as a viable biotechnological strategy, not only for the removal of pollutants, but also to obtain value-added products with potential use in the biorefining of the biomass.

scholarly journals Photo-fenton remediation of wastewaters containing agrochemicals

2005 ◽  
Vol 48 (spe) ◽  
pp. 207-218 ◽  
Author(s):  
Antonio Carlos Silva Costa Teixeira ◽  
Lucas Mendes ◽  
Giselle Stollar ◽  
Roberto Guardani ◽  
Cláudio Augusto Oller do Nascimento
Keyword(s):  
Advanced Oxidation Processes ◽  
Low Cost ◽  
Oxygen Demand ◽  
Solar Irradiation ◽  
Treated Wastewater ◽  
Commercial Application ◽  
Photochemical Degradation ◽  
Fenton Process ◽  
Experimental Conditions ◽  
Oxidation Processes

The photochemical degradation of agrochemicals in aqueous solution by means of advanced oxidation processes (AOPs) was studied. The photo-Fenton process was evaluated in terms of the time evolution of dissolved organic carbon (COD) and chemical oxygen demand (DOC), their total removals, and increase in biodegradability of treated wastewater. Under the experimental conditions studied, the process showed to be superior to other AOPs, at any Fe(II) and H2O2 concentrations. The results pointed towards the use of solar irradiation and low cost commercial application.

scholarly journals Advanced Oxidation Processes and Nanofiltration to Reduce the Color and Chemical Oxygen Demand of Waste Soy Sauce

2018 ◽  
Vol 10 (8) ◽  
pp. 2929 ◽  
Author(s):  
Hyun-Hee Jang ◽  
Gyu-Tae Seo ◽  
Dae-Woon Jeong
Keyword(s):  
Hydrogen Peroxide ◽  
Chemical Oxygen Demand ◽  
Advanced Oxidation Processes ◽  
Oxygen Demand ◽  
Color Removal ◽  
Soy Sauce ◽  
Treatment Efficiency ◽  
Cod Reduction ◽  
Oxidation Processes ◽  
Oxidation Efficiency

Currently, the ozone (O3) oxidation efficiency in the treatment of waste soy sauce provides 34.2% color removal and a 27.4% reduction in its chemical oxygen demand (COD). To improve the O3 oxidation efficiency, hydrogen peroxide (H2O2) is used to cause a H2O2/O3 process. In H2O2/O3 process experiments, a previously optimized pH of 11 and applied O3 dose of 50 mg L−1 were used and the H2O2/O3 ratio was varied between 0.1 and 0.9 in intervals of 0.2. The results show that an H2O2/O3 ratio of 0.3 results in the highest efficiencies in terms of color removal (51.6%) and COD reduction (33.8%). Nanofiltration (NF) was used to pretreat the waste soy sauce to improve color removal and COD reduction. The results showed that NF with an NE-70 membrane results in 80.8% color removal and 79.6% COD reduction. Finally, the combination of NF and H2O2/O3 process resulted in the best treatment efficiency: 98.1% color removal and 98.2% COD reduction. Thus, NF & H2O2/O3 process can be considered as one of the best treatment methods for waste soy sauce, which requires high intrinsic color removal and COD reduction efficiencies.

scholarly journals Solar Concentration for Wastewaters Remediation: A Review of Materials and Technologies

2018 ◽  
Vol 9 (1) ◽  
pp. 118 ◽  
Author(s):  
Murilo Fendrich ◽  
Alberto Quaranta ◽  
Michele Orlandi ◽  
Marco Bettonte ◽  
Antonio Miotello
Keyword(s):  
Advanced Oxidation Processes ◽  
Low Cost ◽  
Model Systems ◽  
Wastewater Remediation ◽  
Industrial Activities ◽  
Oxidation Processes ◽  
Treatment Processes ◽  
Critical Issues ◽  
Real Wastewater ◽  
Materials Used

As the effectiveness of conventional wastewater treatment processes is increasingly challenged by the growth of industrial activities, a demand for low-cost and low-impact treatments is emerging. A possible solution is represented by systems coupling solar concentration technology with advanced oxidation processes (AOP). In this paper, a review of solar concentration technologies for wastewater remediation is presented, with a focus on photocatalyst materials used in this specific research context. Recent results, though mostly on model systems, open promising perspectives for the use of concentrated sunlight as the energy source powering AOPs. We identify (i) the development of photocatalyst materials capable of efficiently working with sunlight, and (ii) the transition to real wastewater investigation as the most critical issues to be addressed by research in the field.

Treatment of Liquid Waste Containing Ethylenediamine Tetraaceticaxid by Advanced Oxidation Processes

2003 ◽  
Vol 6 (1) ◽  
Author(s):  
S. Chitra ◽  
K. Paramasivan ◽  
P. K. Sinha ◽  
K. B. Lai
Keyword(s):  
Ion Exchange ◽  
Advanced Oxidation Processes ◽  
Ethylenediaminetetraacetic Acid ◽  
Liquid Waste ◽  
Chelating Agent ◽  
Advanced Oxidation ◽  
Nuclear Industry ◽  
Oxidation Processes ◽  
Treatment Processes

AbstractEthylenediaminetetraacetic acid (EDTA) is a chelating agent that has been used for decontamination purposes in nuclear industry. The presence of EDTA in decontamination wastes can cause complexation of the cations resulting into interferences in their removal by various treatment processes such as chemical pre­cipitation, ion exchange etc. Further, it might also impart elevated leachability and higher mobility of cationic contaminants from the conditioned wastes i.e. waste immobilized in cement or other matrices and can negatively influence the quality of the final form of waste. Advanced Oxidation Processes (AOP) using ozone, H

scholarly journals Photocatalytic degradation of Reactive Red 24 in Aqueous Media by Photo-Fenton Reagent

2016 ◽  
Vol 11 (7) ◽  
pp. 3751-3758
Author(s):  
Dr. Bhupendra Kumar Sharma ◽  
Anil Kumar Swarnkar
Keyword(s):  
Photocatalytic Degradation ◽  
Textile Industry ◽  
Advanced Oxidation Processes ◽  
Municipal Wastewater ◽  
Aqueous Media ◽  
Dilute Solution ◽  
Fenton Reagent ◽  
Oxidation Processes ◽  
First Order ◽  
First Order Kinetics

Advanced oxidation processes (AOPs) are widely used for the removal of health hazardous organic pollutants from industrial and municipal wastewater. Reactive Red 24, which has a complex molecular structure with azo aromatic groups, is widely used in textile industry. Degradation of Reactive Red 24 by Photo-Fenton regent has been investigated under irradiation of visible light in aqueous solution. The parameters that influence degradation such as concentration of Reactive Red 24, FeSO4, H2O2, light intensity and pH of the experimental solution were studied. The optimum condition for the photocatalytic degradation of dye was established. The degradation of dye in the dilute solution follows the first order kinetics.

scholarly journals Degradation of Phenol in Pharmaceutical Wastewater using TiO2/Pumice and O3/Active Carbon

2019 ◽  
Vol 15 (1) ◽  
pp. 146-154 ◽  
Author(s):  
R. Ratnawati ◽  
E. Enjarlis ◽  
Yuli Amalia Husnil ◽  
Marcelinus Christwardana ◽  
S. Slamet
Keyword(s):  
Advanced Oxidation Processes ◽  
Liquid Waste ◽  
Bandgap Energy ◽  
Ozone Generator ◽  
Pharmaceutical Wastewater ◽  
Pumice Stone ◽  
Oxidation Processes ◽  
Bet Analysis ◽  
Photon Source ◽  
Granulated Activated Carbon

Phenol is a toxic organic compound that detectable in the pharmaceutical wastewater, and therefore it should be eliminated. This study aims to degrade phenol in the pharmaceutical wastewater treatment using Advanced Oxidation Processes (AOPs) include the photocatalytic process applying Titanium Oxide (TiO2) that immobilized on pumice stone (PS), as well as ozone process with O3 and O3/granulated activated carbon (GAC). Degradation system used two configuration reactors that worked alternately at pH 3 and 9. Photocatalysis was conducted for 4 hours in the photoreactor that equipped with mercury lamp as a photon source, while ozonation was performed for 1 hour in the cylinder glass reactor contained an ozone generator. Phenol degradations were done by photocatalysis, ozonation, photocatalysis followed by ozonation and vice versa. The FESEM-EDS and XRD results depicted that TiO2 has impregnated on pumice stone and FESEM characterization also indicated that the photocatalyst spread across the surface of the pumice stone. BET analysis results in an increased surface area of the PS-TiO2 by 3.7 times, whereas bandgap energy down to 3 eV. It can be concluded that ozone process (with O3/GAC) that followed by photocatalysis at pH 9 could treat the liquid waste with phenol concentration 11.2 down to 1.2 ppm that nearly according to the discharge standards quality (1 ppm).  Copyright © 2020 BCREC Group. All rights reserved 

scholarly journals Solar assisted photo fenton for cost effective degradation of textile effluents in comparison to AOPS

2013 ◽  
Vol 14 (4) ◽  
pp. 477-486 ◽  
Keyword(s):  
Cost Effectiveness ◽  
Advanced Oxidation Processes ◽  
Cost Effective ◽  
Cod Removal ◽  
Energy Requirements ◽  
Fenton Process ◽  
Medium Ph ◽  
Oxidation Processes ◽  
Very High ◽  
Color And Cod Removal

Solar assisted Photo Fenton was compared with advanced oxidation processes for their color and COD removal efficiency and cost effectiveness. H2O2 alone appeared to be inefficient to reduce color and COD content of any effluent. The performance of Fenton process was slightly better, color and COD removals were 45 % and 63% respectively. Photo Fenton treatment of blue effluent resulted into color and COD removal of 56 % and 66 % respectively. In case of black effluent, the removal of these parameters was 39 % and 84% respectively. However, application of solar radiation (18 hours) resulted in substantial color and COD removal (i.e. 52 % and 88 % respectively for black effluent and 61 % and 85 %, respectively for blue effluent). Solar assisted photo Fenton proved as the most energy and cost effective (100 to 150 times less as compared to UV/Fe/H2O2 and O3 ) process among all AOPs, although ozone completely decolorized the effluent and showed more than 87% COD removal in an alkaline medium (pH 9) but at very high cost. The electrical energy requirements of the tested processes followed the increasing order UV/Fe/H2O2 < O3 < H2O2< Fe/H2O2< Solar/ Fe/H2O2.

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