Fenton process on waste using ozone
224928993
Pretreatment of yard waste using advanced oxidation processes for enhanced biogas production
Abstract This work investigated the effect of Fenton, ozone and peroxone pretreatment process on yard waste for biogas production enhancement through breakdown of complex lignocellulosic structure. The pretreatment of yard waste was carried out at different experimental conditions of Fenton (ratio: 1:5, 1:10, 1:20, 1:30, 1:40 and 1: 50; doses; 200 mgL 1: 4000 mgL 1 to 800 mgL 1: 16000 mgL 1; time: 30 min 120 min) ozone (pH: 3, 5, 7 9; ozone dosage:0.2 g h 1 to 2.5 g h 1; time: 15 min 60 min) and peroxone (doses: 1 mL to 5 mL) to obtain maximum biogas production. The results indicated that cellulose, hemicellulose and lignin content of yard waste decreased during pretreatment process with increased TRS concentration and in turn improves the biogas production. Pretreatment of yard waste using peroxone process resulted in maximum enhancement of TRS concentration up to 470 mg g 1 biomass from initial value of 55.3 mg g 1 biomass at an optimized condition of ozone dose of 1.8 g h 1 for 30 min with 1 mL H2O2 at pH 3. Subsequently, peroxone pretreatment showed the highest biogas production of 210 mL g 1 VS (63% CH4) as compared to control only 80 mL g 1 VS (35% CH4) The GC MS and FTIR analysis of pretreated yard waste confirms the degradation of complex lignocellulosic structure.
Sameena N Malik Krishna Madhu Vasant A Mhaisalkar Atul Narayan Vaidya Sandeep Narayan Mudliar
205672961
New treatment of stabilized leachate by ozone/Fenton in the advanced oxidation process.
Ozonation, combined with the Fenton process (O(3)/H(2)O(2)/Fe(2+ was used to treat matured landfill leachate. The effectiveness of the Fenton molar ratio, Fenton concentration, pH variance, and reaction time were evaluated under optimum operational conditions. The optimum removal values of chemical oxygen demand (COD) color, and NH(3) N were found to be 65% 98% and 12% respectively, for 90 min of ozonation using a Fenton molar ratio of 1 at a Fenton concentration of 0.05 mol L( 1) (1700 mg/L) H(2)O(2) and 0.05 mol L( 1) (2800 mg/L) Fe(2+ at pH 7. The maximum removal of NH(3) N was 19% at 150 min. The ozone consumption for COD removal was 0.63 kg O(3)/kg COD. To evaluate the effectiveness, the results obtained in the treatment of stabilized leachate were compared with those obtained from other treatment processes, such as ozone alone, Fenton reaction alone, as well as combined Fenton and ozone. The combined method (i.e. O(3)/H(2)O(2)/Fe(2+ achieved higher removal efficiencies for COD, color, and NH(3) N compared with other studied applications.
Waste management
Salem S Abu Amr Hamidi Abdul Aziz
202040602
Degradation of Ethylene Diaminetetra Acetic Acid With Ferrous Ions Using Fenton's Reagent in Absence of Light
Accumulation of deposit corrosion products inside secondary side of steam generator can lead to serious issue for pressurized water reactor in operation.One way to avoid accumulation of these deposits is to perform chemical cleaning which removes certain amount of deposits but this kind of operation generates high amount of liquid waste which contains process chemicals and metal ions in complex state. Oxidation of complexes will render radioactive ions in free state enabling us for further treatment to innocuous level and condition. In waste treatment there are various treatment technologies (advance oxidation process, ozone, hydrogen peroxide, electrochemical oxidation, supercritical water oxidation, electro flocculation etc to remove the accumulated deposit..In decontamination process removal of the deposits was carried out using EDTA. which complexes the metal ions but it generates secondary waste with EDTA. We have made an attempt to degrade ethylene diaminetetra acetic acid (with ferrousions) using Fenton's reagent in absence of light. This will free the radioactive ion for further treatment. We have studied different volume of hydrogen peroxide (H2O2) and different concentration of ethylene diamine tetra acetic acid (EDTA) Study was also done to find the effect of pH and temp on the degradation of EDTA. In the range of concentration of ethylene diamine tetra acetic acid 400ppm to 22500 ppm degradation was found to change from 57 to 98% in 180 min. The pH was found to change from 4.0 to 8.2. The temperature was found to change from 298K to 328K. The rate constant of the degradation reaction was found to be in the range 10 4 to 10 3 in temperature range 298K to 328K. Activation energy for degradation reaction was found to be 33 88 KJ/mol.
International Journal of Chemistry
Ajay Kumar Mishra S Velmurugan B S Panigrahi Biplob Paul S Vijaya Chitra S K Khandelwal
222224993
Distillery Waste Water Treatment by Advanced Oxidation Process Fe 3 H 2 O 2 or H 2 O 2 UV or Fe 3 H 2 O 2 UV
Advanced Oxidation Processes (AOP) involving hydroxyl radicals, which are one of the strongest inorganic oxidants next to elemental fluorine, have been extremely effective in the destruction of organic pollutants. These advanced oxidation process (AOP) generally use a combination of oxidation agents (such as H2O2 or O3) irradiation (such as UV or ultrasound) catalysts (such as metal ions or photo catalysts) and radiolysis (such as gamma irradiation or electron beam) as a means to generate hydroxyl radicals The hydroxyl radicals can be generated by different oxidation processes, such as ozone (O3) ultraviolet (UV) Hydrogen peroxide combined with ultraviolet radiation (H2O2/UV) Fenton reagent (FeH2O2) photoFenton process UV Fe II H2O2 and heterogeneous photo catalysis using semiconductors such as zinc oxide (ZnO) but mainly titanium dioxide (TiO2) TiO2/UV and (H2O2/UV) process Ultrasonic technology as an innovative technology may be used for water and wastewater treatment for pollution removal. This technology acts as an advanced oxidation process. Application of this technology leads to the decomposition of many complex organic compounds to much simpler compounds during physical and chemical compounds during cavitation process. Advanced Oxidation Processes (AOP) using ozone, H2O2, ultrasound (US) ultraviolet radiation (UV) Fenton's reagent (FeII+H2O2) alone or in combination involving hydroxyl radicals are considered as possible methods of clean and ecologically safe remedial treatment for the degradation of organics.
Mrs Jagdevi K Gutthe
208365747
Waste Water Treatment of Distillery By Photochemical Process
Conventional oxidation processes are used in water treatment to disinfect water, to reduce toxins, odour and colour or to reduce manganese and iron levels in potable water. These processes may not destroy all toxins and have the potential to create dangerous disinfection by products (DBPs) Advanced oxidation process (AOP) utilises the strong oxidising power of hydroxyl radicals that can reduce organic compounds to harmless end products such as carbon dioxide and water. The hydroxyl radicals can be generated by different oxidation processes, such as ozone (O3) ultraviolet (UV) Hydrogen peroxide combined with ultraviolet radiation (H2O2/UV) Fenton reagent (Fe2+/H2O2) photoFenton process (Pignatello,1992) O3/UV O3/H2O2 and heterogeneous photo catalysis using semiconductors such as zinc oxide (ZnO) but mainly titanium dioxide (TiO2) TiO2/UV and (H2O2/UV) process Ultrasonic technology as an innovative technology may be used for water and wastewater treatment for pollution removal. This technology acts as an advanced oxidation process. Application of this technology leads to the decomposition of many complex organic compounds to much simpler compounds during physical and chemical compounds during cavitation process. Advanced Oxidation Processes (AOP) using ozone, H2O2, ultrasound (US) ultraviolet radiation (UV) Fenton's reagent (FeII+H2O2) alone or in combination involving hydroxyl radicals are considered as possible methods of clean and ecologically safe remedial treatment for the degradation of organics. Advanced Oxidation Processes (AOP) involving hydroxyl radicals, which are one of the strongest inorganic oxidants next to elemental fluorine, have been extremely effective in the destruction of organic pollutants. These advanced oxidation process (AOP) generally use a combination of oxidation agents (such as H2O2 or O3) irradiation (such as UV or ultrasound) catalysts (such as metal ions or photo catalysts) and radiolysis (such as gamma irradiation or electron beam) as a means to generate hydroxyl radicals
Prof Kharde Ashwini Ganpat
105833192
Enhanced synergistic degradation efficiency using hybrid hydrodynamic cavitation for treatment of tannery waste effluent
Abstract The treatment of recalcitrant bio refractory pollutants especially common in wastewater emanating from the tannery industries is a major challenge to the industries due to the absence of an efficient treatment technology, high operational costs as well as in view of the stringent rules imposed by the various environmental and governmental regulatory bodies. This study reports the degradation of organic pollutants present in tannery waste effluent (TWE) using hybrid hydrodynamic cavitation (HC) such as HC ozone (O3) HC hydrogen peroxide (H2O2) and HC Fenton's reagent. HC treatment alone caused a reduction of 14.46% chemical oxygen demand (COD) 12.60% total organic carbon (TOC) 10.01% total dissolved solids (TDS) and 34.82% total suspended solids (TSS) of the TWE samples at the optimum inlet pressure of 500 kPa within 120 min. It also caused an increase in biodegradability index (BI) value from 0.33 to 0.43 indicating increased biodegradability, whereas dilution of the TWE samples did not enhance the HC process efficiency. HC combined with O3 was effective as COD and TOC reduction increased to 26.81% and 17.96% respectively at the optimum loading of 7 g/h of O3. HC combined with H2O2 also significantly enhanced the degradation efficiency to a maximum of 34.35% COD and 19.71% TOC reduction due to the enhanced generation of hydroxyl radicals. However, HC combined with Fenton's process was found to be the most efficient hybrid process for the treatment of TWE at a maximum reduction of 50.20% COD and 32.41% TOC respectively at FeSO4.7H2O/H2O2 ratio of 1:3 (w/w) The requirement of H2O2 per g of COD reduction for HC Fenton reduced to 1.95 g/g compared to the requirement of 3.02 g/g for HC H2O2 process. Moreover, HC Fenton's treatment increased the BI value from 0.28 to 0.46, which is an increase by 64% compared to an increase by 30% using HC alone. These hybrid techniques enhanced the BI of treated TWE and therefore may be used as a pre treatment tool by integrating into existing biological treatment units in the conventional effluent treatment plants, in order to cause enhanced degradation of highly bio recalcitrant organic pollutants. Other enhanced benefits include higher rate of mineralization of organic matter with lower cost of treatment. Hybrid HC Fenton was the most energy efficient approach than HC process with a 75% reduction in the energy requirement and 56% reduction in treatment cost per mg of COD reduction of TWE.
Shivendu Saxena Virendra Kumar Saharan Suja George
208002922
Design and development of an integrated treatment system for pharmaceutical waste with toxicological study
In the present study, sole adsorption, Fenton's oxidation, ozone treatment and biochemical treatment by Alcaligenes feacalis (A. feacalis) and Exiguobacterium aurantiacum (E. aurantiacum) and combination of the above treatments have been studied. It was observed that Fenton's treatment is efficient for degradation of Pantoprazole in any concentration pantaprazole. In Fenton's process, the degradation obtained 56.77% at pH 3.5 in an hour and in ozone treatment, 36% removal was achieved in 8 min for 600 ppm concentration. The microbial treatment is proved to be a good one but in the lower range of pantoprazole about 200 mg/L. The degradation of pantoprazole was achieved 58.40% and 60.08% by using A. feacalis and E. aurantiacum respectively in 72 h. Combination treatment has been designed, and the system worked efficiently. In the first step either Fenton's treatment, activated carbon or ozone treatment were performed followed by biochemical treatment. The maximum percentage removal of pantoprozole was observed 90.17% 81.57% and 71.07% respectively. The process also proves that it is partially cost effective, energy saving and environmentally safe operation.
Kalyan Kumar Sarkar S R Majee Uttarini Pathak Dalia Dasgupta Mandal Tamal Mandal
102650282
A water and wastewater treatment system and method using advanced oxidation processes(uv with catalyst, fenton, ozone) and pressurized ozone oxidation(aop po2)
The present invention with waste water and the coating material in a sealed vessel in the device and method for treating drinking water a plurality of UV lamps are installed vertically, and titanium dioxide (TiO2) between the UV lamp space (STS 316, ceramic, glass There are, etc. filling of filled, the ozone gas of high pressure (4 8 atm or higher) flows into the pair of lower, higher that the raw water and the pen tonaek mixed flows into the contact tank top a highly water treatment method using a pressurized ozonation. The water treatment process is a certain amount of pen enemies the tonaek is injected while, the high pressure that flows through the surface of the titanium dioxide coating in the tank ozone oxidation of the high pressure filling a is brought into contact with a high concentration of ozone gas, at the same time the titanium dioxide coating When irradiated with UV (ultraviolet) light source on the contact surface is the Fenton oxidation, photolysis, high ozone oxidation by the photocatalyst to occur at the same time in the reaction tank of the high pressure ozone gas. Feature of the invention is enumerated advanced oxidation are high concentrations will occur simultaneously in a single reaction vessel to an ozone gas of high pressure is present, the oxidizing ability to maximize the short contact time (1 5 minutes) by the synergistic effect of advanced oxidation occurs at the same time It made on the oxidation reaction. The invention and microorganisms used in waste water or drinking water treatment, as well as sterilization, the manure (cattle manure) and the chromaticity of the dyeing waste water and pigments waste water is used for removing or recalcitrant organic matter treatment of chemical waste landfill leachate and wastewater in. AOP PO2 process, Advanced Oxidation Process, Pressurized Ozone Oxidation, high pressure ozone oxidation step, ozone, decolorization, recalcitrant organic matter, microorganisms, sterilization
113295779
Degradation of Dyeing Effluent Using Fenton's Oxidation
After agriculture, textile and dyeing industry will be the second largest employment opportunity in India. It has its importance due to its environmental impacts because of the waste water produced with high chemical Oxygen Demand, turbidity. Treatment technologies generally used for degradation of dyeing effluent includes electrooxidation, bio treatment, photochemical, and membrane processes, Biodegradation, Coagulation flocculation, adsorption on activated carbon, Ozone treatment. In this paper treatment of dyeing industry waste water through Fenton's reagent is investigated. The experimental results are assessed in terms of COD and color reductions in dyeing wastewater, to determine the efficiency of the Fenton's process. Operating variables of Fenton's treatment such as the pH, reaction time, concentration of H2O2 and FeSO4, initial concentration of wastewater were explored to determine their respective effects on the efficiency of the Fenton's oxidation of the dyeing industry wastewater. Optimum operating range for each of those variables was obtained through batch studies. The optimum pH was observed to be at 3 and optimum ratio of FeSO4 to H2O2 was 2:1. Fenton oxidation showed an efficiency of 72% in 2 h of reaction time, and it goes up to 75 78% in 6 h. Kinetics and thermodynamics studies on the Fenton oxidation of organics of dyeing industry waste water also performed.
S S Aravinth Priya M Ezhil
103011036
Purification method and the apparatus of exhaust gases by using advanced oxidation process of fenton reaction
An exhaust gas purification method and a purification apparatus are provided to completely purify the bad smell and the environmental toxic material comprised by the hydroxyl radical which is powerful than the ozone of the organic compound with the advanced oxidation process by inflowing the exhaust gas to the scrubber among the drying procedure or the cremation process of waste. An exhaust gas purification method performs the followings: a step inflowing the environmental gas to the scrubber inside in which the advanced oxidation process solution providing the advanced oxidation process with the fenton oxidation method of construction is included and is passed; and a step for purifying the cause of offensive odor material and the environmental toxic material which is comprised to the organic compounds the advanced oxidation process solution is sprayed in the scrubber inside. An exhaust gas purification apparatus comprises the scrubber(30) having the filler(40) layer the exhaust gas flowed in passes; the porous partition for supporting the filler; and the spray nozzle(60) which minutes, can jet the advanced oxidation process solution.