scholarly journals Biogas production in the methane fermentation of excess sludge oxidized with Fenton’s reagent

2019 ◽  
Vol 116 ◽  
pp. 00104
Author(s):  
Iwona Zawieja ◽  
Kinga Brzeska
Keyword(s):  
Fermentation Process ◽  
Biogas Production ◽  
Process Conditions ◽  
Oh Radicals ◽  
Fenton’S Reagent ◽  
Iron Ions ◽  
Fenton Reagent ◽  
Excess Sludge ◽  
Methane Fermentation ◽  
Fenton's Reagent

The advanced oxidation processes (AOPs) play an important role in the degradation of hardly decomposable organic pollutants. AOPs methods rely on the production of highly reactive hydroxyl OH• radicals. The aim of the conducted research was to intensify biogas production in the methane fermentation process of excess sludge subjected to the process of deep oxidation with Fenton's reagent. In the process of oxidation of sewage sludge with the Fenton reagent, doses of iron ions in the range 0.02–0.14 g Fe2+/g TS (total solids) were used Hydrogen peroxide was measured in the proportions 1: 1–1:10 in relation to the mass of iron ions. The basic substrate of the study was excess sludge. In the case of excess sludge oxidation with the use of Fenton's reagent, the most favorable process conditions were considered to be the dose of iron ions 0.08 g Fe2+/g d.m. and a Fe2+: H2O2 ratio of 1:5. As a result of subjecting the excess sludge to disintegration with the Fenton reagent in the above-mentioned dose, with respect to the fermentation process of unprocessed sludge, about two-fold increase in the digestion degree of excess sludge and about 35% increase of the biogas yield was obtained.

Methane fermentation of the excess sludge sonicated and oxidized with Fenton's reagent

2021 ◽  
Vol 232 ◽  
pp. 216-224
Author(s):  
Iwona Zawieja ◽  
Malgorzata Worwag ◽  
Kinga Brzeska
Keyword(s):  
Fenton’S Reagent ◽  
Excess Sludge ◽  
Methane Fermentation ◽  
Fenton's Reagent

Kinetics and mechanism of oxidative decomposition of Congo red by Fenton’s reagent and its synergic effects on exposure to UV radiation

2021 ◽  
Vol 25 (7) ◽  
pp. 8-12
Author(s):  
P. Rajendran ◽  
K. Geethu ◽  
P. Bashpa ◽  
K. Bijudas
Keyword(s):  
Congo Red ◽  
Homogeneous Medium ◽  
Ultra Violet ◽  
Kinetics And Mechanism ◽  
Fenton’S Reagent ◽  
Fenton Reagent ◽  
Fenton's Reagent ◽  
Oxidative Decomposition ◽  
Ultra Violet Radiation ◽  
Thermodynamic Variables

Congo red is a toxic azo dye which is used extensively in industries like textile, paper, pulp and paper. Very high amount of Congo red from these industrial sources is discharged into natural water bodies resulting environmental pollution. The present work reports the kinetics and mechanism of oxidative decomposition of Congo red by Fenton’s reagent in homogeneous medium and also under ultra violet light irradiation. Kinetic parameters like effect of [Fe2+], [H2O2], [Congo red] and temperature on the decomposition of Congo red were studied. The reaction is found to be fractional order with [Fe2+] and first order with [H2O2] and [Congo red]. The rate of oxidative decomposition of Congo red by Fenton’ reagent showed a rapid increase of three times when irradiated with ultra violet radiation and completion of reaction occurred within 5-6 minute. Various thermodynamic variables were determined and the presence of isosbestic points on sequential scanning of oxidation kinetics proves that the reaction is very smooth, spontaneous and endothermic. A suitable mechanism is suggested based on the experimental results obtained.

scholarly journals Improved sludge dewaterability and hydrolysis performance after pretreatment with Fenton's reagent

2017 ◽  
Vol 77 (1) ◽  
pp. 204-210 ◽  
Author(s):  
Hongying Yuan ◽  
Yuping Yang ◽  
Jian Yuan ◽  
Yanning Wang ◽  
Yameng Song ◽  
...  
Keyword(s):  
Volatile Fatty Acids ◽  
Oxygen Demand ◽  
Ammonia Nitrogen ◽  
Fenton’S Reagent ◽  
Excess Sludge ◽  
Reaction Conditions ◽  
Fenton's Reagent ◽  
Soluble Polysaccharide ◽  
Soluble Chemical Oxygen Demand ◽  
Sludge Dewaterability

Abstract The dewaterability of excess sludge significantly improved upon pretreatment with Fenton's reagent in this study. After 0.9 g/L of Fe2+ and 5.0 g/L of H2O2 were added to the sludge, and reacted for 2 h at pH = 4, the specific resistance to filtration (SRF) of the excess sludge decreased from an initial value of 29.74 × 1012 m/kg to 6.49 × 1012 m/kg. The factors that affected this improvement in sludge dewaterability as evaluated by SRF reduction showed the following order: H2O2 > pH > Fe2+ > reaction time. Furthermore, the hydrolysis performance of the sludge under the optimal reaction conditions was investigated. The results indicated that the concentration of soluble chemical oxygen demand in the supernatant increased almost 14 times compared to raw sludge, and the contents of soluble protein and soluble polysaccharide were more than 8 and 17 times higher, respectively, than for the untreated situation. However, the amounts of ammonia nitrogen (NH4+-N) and phosphate (PO43−-P) released from the sludge showed different trends: NH4+-N increased by 200%, while PO43−-P decreased by 82%. The production of volatile fatty acids (VFAs) from the treated sludge showed that total VFAs increased by 66%, and iso-butylacetic acid was the dominant product among the total VFAs.

Influence of pretreatment with Fenton’s reagent on biogas production and methane yield from lignocellulosic biomass

2012 ◽  
Vol 119 ◽  
pp. 72-78 ◽  
Author(s):  
Karina Michalska ◽  
Krystian Miazek ◽  
Liliana Krzystek ◽  
Stanisław Ledakowicz
Keyword(s):  
Lignocellulosic Biomass ◽  
Biogas Production ◽  
Methane Yield ◽  
Fenton’S Reagent ◽  
Fenton's Reagent

scholarly journals The usefulness of sugar beets for biogas production in relations of the storage time and sugar content

2018 ◽  
Vol 44 ◽  
pp. 00114 ◽  
Author(s):  
Natalia Mioduszewska ◽  
Mariusz Adamski ◽  
Anna Smurzyńska ◽  
Jacek Przybył ◽  
Krzysztof Pilarski
Keyword(s):  
Sugar Beet ◽  
Storage Time ◽  
Fermentation Process ◽  
Biogas Production ◽  
Sugar Content ◽  
Storage Period ◽  
Methane Fermentation ◽  
Sugar Beets ◽  
Biogas Yield

The aim of the study was to evaluate the usefulness of sugar beet for biogas production, taking into account the duration time of storage and sugar content in the roots. The research has included analysis of methane and biogas yield of sugar beet. The relations between the sugar content in the roots and the length of storage period and the course of the methane fermentation process were determined. Sugar beets with sugar content of 17.6% and 19.6% were used for this experiment. In order to analyse the fermentation process, the fresh beets and the beets stored in flexible, hermetic tanks in the period of 43 and 89 days were used. Based on the analysis of the obtained results, it was found that the sugar content and the storage time of sugar beet roots can differentiate the production of biomethane and that it influences the methane fermentation process and the quality of the produced biogas.

Influence of pH on the dewatering of activated sludge by Fenton's reagent

2001 ◽  
Vol 44 (10) ◽  
pp. 327-332 ◽  
Author(s):  
M.-C. Lu ◽  
C.-J. Lin ◽  
C.-H. Liao ◽  
W.-P. Ting ◽  
R.-Y. Huang
Keyword(s):  
Control Experiment ◽  
Treatment Plant ◽  
Fenton’S Reagent ◽  
Excess Sludge ◽  
Fenton's Reagent ◽  
Initial Ph ◽  
And Control ◽  
Sludge Settling ◽  
Influence Of Ph ◽  
H2o2 System

The specific filtration resistance, moisture, and SVI were used to evaluate the influence of pH on the filtration and dewatering efficiencies when applying Fenton's reagent to treat the excess sludge. The excess sludge used in this study was obtained from the wastewater treatment plant of An-Ping Industrial Park in Tainan, Taiwan. Results show that initial pH has no significant effect on the filtration efficiency of sludge by using the Fenton (Fe2+/H2O2) system as the treatment process. However, the reduction of specific resistance by Fenton-like (Fe3+/H2O2) process decreased suddenly to a level similar to that obtained from the control experiment at initial pH > 4.5. For the moisture of cake sludge, both Fenton and Fenton-like systems have the same tendency; the moisture of cake sludge increased slightly with increasing the initial pH. The SVI values for Fenton process decreased with increasing the initial pH, but the opposite result was obtained from the Fenton-like and control system; higher pH was not favorable for the sludge settling.

Performance Evaluation of Fenton Oxidation Treatment Method for the Reuse of Reactive Dyeing Effluent

2019 ◽  
Vol 41 (6) ◽  
pp. 1138-1138
Author(s):  
Sana Islam Sana Islam ◽  
Irfan Ahmed Shaikh Irfan Ahmed Shaikh ◽  
Nabeela Firdous Nabeela Firdous ◽  
Azhar Ali and Yumna Sadef Azhar Ali and Yumna Sadef
Keyword(s):  
Optimal Dose ◽  
Treatment Method ◽  
Quality Parameters ◽  
Fenton’S Reagent ◽  
Fenton Reagent ◽  
Color Strength ◽  
Fenton's Reagent ◽  
Reactive Dyeing ◽  
Wash Fastness ◽  
Reactive Orange

In this study, a novel wash-off method was investigated wherein the use of Fenton’s reagent was evaluated to get rid of hydrolyzed and unfixed reactive dyes from wash-off liquor and reused in next wash-off process. After dark shade dyeing (5% o.w.f) with C.I. Reactive Blue 72, C.I. Reactive Blue 221, C.I. Reactive Red 141, C.I. Reactive Red 198, C.I. Reactive Orange 84, C.I. Reactive Orange 122, C.I. Reactive Yellow 105 and C.I. Reactive Yellow 138 , fabrics were subjected to both clean water (reference) and treated wash-off liquors (batch) and comparisons were made. Fenton reagent was proved capable to achieve 88-97% color reduction in wash-off liquor at pH 3 by using optimal dose of FeSO4 and H2O2 at room temperature. Then effectiveness of Fenton’s reagent treated wash-off was evaluated in terms of color difference values (ΔL*, ΔC*, Δh* and ΔE*), wash fastness and crocking properties. For color fastness properties the commercially tolerable value of ΔE*≤1 was observed for blue and red dyes and slightly higher value for yellow and orange dyes. Wash fastness and crocking results are almost similar for reference and batch dyed fabrics and their values ranges 4-5 on grey scale. Color strength (K/S) showed negligible difference in values indicating that fabrics absorbed almost same amount of dyestuff for each dye .Fenton method of treatment proved to be an eco-friendly and economically feasible treatment method and treated liquor can be effectively used in next dyeing, without compromising quality parameters.

scholarly journals The influence of mixing inside the fermentation reactors during the study of biogas efficiency of the substrates in mesophilic technology

2018 ◽  
Vol 10 ◽  
pp. 01012
Author(s):  
Kamil Kozlowski ◽  
Marta Cieslik ◽  
Jakub Mazurkiewicz ◽  
Anna Smurzynska ◽  
Michal Brzoski ◽  
...  
Keyword(s):  
Fermentation Process ◽  
Biogas Production ◽  
High Energy ◽  
Current Standard ◽  
Methane Fermentation ◽  
Environmental Friendly ◽  
Maize Straw ◽  
Biogas Plants ◽  
Accredited Laboratory ◽  
Gas Fuel

Along with the development of environmental friendly technologies, an increasing interest in generating the electricity and heat from renewable sources has been observed in Poland. Perfect example of such installations are agricultural biogas plants, where methane fermentation produces high-energy gas fuel i.e. biogas. Before investing, it is necessary to perform a detailed studies of the biogas efficiency of the substrates used. The proper run of fermentation process, as well as the high biogas production related to the operation, depend on many factors, including the mixing inside the reactor. The DIN 38 414-S8 standard, commonly used in the tests, assumes the mixing of the whole eudiometric sets, used in accredited laboratory units, which due to their uniform construction may cause problems. The aim of the study was to determine the effect of laboratory mixing in the fermentation reactor on the biogas efficiency of the maize straw. The experiment tests were performed in the Laboratory of Ecotechnologies, in the Poznan, in accordance with the current standard DIN 38 414-S8.The obtained research results confirmed the effect of mixing inside the fermentation reactors on the biogas efficiency of the maize straw.

scholarly journals Biogas Production from Excess Sludge Oxidized with Peracetic Acid (PAA)

Energies ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3434
Author(s):  
Iwona Zawieja ◽  
Małgorzata Worwąg
Keyword(s):  
Peracetic Acid ◽  
Production Efficiency ◽  
Volatile Fatty Acids ◽  
Biogas Production ◽  
Anaerobic Conditions ◽  
Excess Sludge ◽  
Methane Fermentation ◽  
Sludge Digestion ◽  
Human Functioning ◽  
High Degree

Human functioning related to living and economic activity involves generating an increasing amount of sewage and sludge, which needs to be subjected to advanced processes of treatment, neutralization, and management. The deterioration in the susceptibility of excess sludge to biochemical decomposition observed under anaerobic conditions leads to the development and application of highly effective methods of wastewater treatment based on the removal of biogenic compounds using activated sludge, with a high degree of sludge thickening obtained in mechanical facilities. The concentration of volatile fatty acids, being an important intermediate product of anaerobic stabilization, directly determines biogas production efficiency. This study aimed to determine the effect of chemical disintegration with peracetic acid on biogas production efficiency using methane fermentation of pretreated sludge. Intensification of the hydrolysis phase is an important determinant of the efficiency of biochemical sludge decomposition under anaerobic conditions. The association of excess sludge oxidation, initiated by peracetic acid with biological hydrolysis, which is the first phase of methane fermentation, led to an increase in sludge digestion degree and biogas production efficiency. The compound of STERIDIAL W-10, which is an aqueous solution of 10% peracetic acid, 10% acetic acid, and 8% hydrogen peroxide, was used. The disintegration of excess sludge with a reactant dose of 3.0 mL of STERIDIAL W-10/L yielded a specific biogas production of 0.52 L/g VSS and a 74% degree of sludge digestion.

scholarly journals Impact of Adding Biopreparations on the Anaerobic Co-Digestion of Sewage Sludge with Grease Trap Waste

2016 ◽  
Vol 22 (3) ◽  
pp. 167-179 ◽  
Author(s):  
Małgorzata Worwąg
Keyword(s):  
Sewage Sludge ◽  
Fermentation Process ◽  
Hydraulic Retention Time ◽  
Biogas Production ◽  
Methyl Esters ◽  
Production Plant ◽  
Similar Relationship ◽  
Methane Fermentation ◽  
Grease Trap Waste ◽  
Mesophilic Conditions

Abstract The aim of the study was to evaluate the effect of using biopreparations on efficiency of the co-fermentation process. Commercial bacterial biopreparations DBC Plus Type L, DBC Plus Type R5 and yeast biopreparations were used in the study. The process of cofermentation of sewage sludge with grease trap waste from a production plant that manufactured methyl esters of fatty acids was analysed in the laboratory environment under mesophilic conditions. The sludge in the reactor was replaced once a day, with hydraulic retention time of 10 days. Grease trap waste accounted for 35%wt. of the fermentation mixture. The stabilization process was monitored everyday based on the measurements of biogas volume. Addition of yeast biopreparation to methane fermentation of sewage sludge with grease trap waste caused an increase in mean daily biogas production from 6.9 dm3 (control mixture) to 9.21dm3 (mixture M3). No differences in biogas production were found for other cases (mixtures M1, M2). A similar relationship was observed for methane content in biogas.

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