Combined Biologic (Anaerobic-Aerobic) and Chemical Treatment of Starch Industry Wastewater

Sklyar, V.; Epov, A.; Gladchenko, M. A.; Danilovich, Dmitrii; Kalyuzhnyi, S.

doi:10.1385/abab:109:1-3:253

Cited by 37 publications

(10 citation statements)

References 7 publications

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“…These compounds are very toxic at concentrations higher than 2 mg/L and also have a high oxygen demand (2.4 mg/mg phenol), giving rise to a considerable decrease in oxygen concentration and problems for aquatic life. Several treatment methods are possible, including some that attempt to recover the phenol for reuse, incineration, sorption [1], biologic treatment [2] and chemical oxidation [3]. The method selected will depend essentially on pollutant concentration and other strategic and financial aspects.…”

Section: Introductionmentioning

confidence: 99%

Kinetic study and hydrogen peroxide consumption of phenolic compounds oxidation by Fenton’s reagent

Luis

Lombraña

Varona

et al. 2009

Korean J. Chem. Eng.

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Synthetic solutions of phenol, o-, m-and p-cresol were oxidised by using Fenton's reagent. The application of substoichiometric dosage of H 2 O 2 led to the formation of intermediate compounds, continuing later the oxidation to complete oxidation. An important objective was to analyze the effect of hydrogen peroxide dosage applied and the reaction pH together with the iron oxidation state on the degradation level. A kinetic model was derived from a reaction mechanism postulated which was used to analyze the results of the experiments. Another aim was to analyze the hydrogen peroxide consumption. Noteworthy results include an increase in oxidant consumption to intensify phenol removal. Furthermore, oxidant consumption was analyzed through the ratio H 2 O 2 to phenol removed and the average specific rate of removal (ASRR). By analyzing these two parameters it has been possible to ascertain the most favorable strategy for an efficient application of H 2 O 2 .

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Section: Introductionmentioning

confidence: 99%

Kinetic study and hydrogen peroxide consumption of phenolic compounds oxidation by Fenton’s reagent

Luis

Lombraña

Varona

et al. 2009

Korean J. Chem. Eng.

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“…Operating temperatures of 30±1 and 10±1 o C were maintained by placing the corresponding reactor into thermostat "TS-80" (Mashzavod, Odessa, USSR) or refrigerator "Snaige" (Alitus, Lithuania), respectively. Reactor M (mesophilic) was seeded with mesophilic sludge (40 g VSS, specific aceticlastic activity -0.67 g COD/g VSS/d at 30 o C) originating from an UASB reactor treating starch industry wastewater (Sklyar et al, 2002). Reactor P (psychrophilic) was seeded with psychrophilic sludge (12.2 g VSS, specific aceticlastic activity -0.12 g COD/g VSS/d at 10 o C) originating from an UASB reactor treating winery wastewater (Kalyuzhnyi et al, 2001).…”

Section: Methodsmentioning

confidence: 99%

Combined anaerobic-aerobic treatment of landfill leachates under mesophilic, submesophilic and psychrophilic conditions

Kalyuzhnyi

Gladchenko

Epov

2003

Water Science and Technology

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As a first step of treatment of landfill leachates (total COD--1,430-3,810 mg/l, total nitrogen 90-162 mg/l), a performance of laboratory UASB reactors has been investigated under mesophilic (30 degrees C), sub-mesophilic (20 degrees C) and psychrophilic (10 degrees C) conditions. Under hydraulic retention times (HRT) of around 7 h, when the average organic loading rates (OLR) were around 5 g COD/l/day, the total COD removal accounted for 81% (on the average) with the effluent concentrations close to anaerobic biodegradability limit (0.25 g COD/l) for mesophilic and sub-mesophilic regimes. The psychrophilic treatment conducted under the average HRT of 8 h and the average OLR of 4.22 g COD/l/day showed a total COD removal of 47% producing the effluents (0.75 g COD/l) more suitable for subsequent biological nitrogen removal. All three anaerobic regimes used for leachate treatment were quite efficient for elimination of heavy metals (Fe, Zn, Cu, Pb, Cd) by concomitant precipitation in the form of insoluble sulphides inside the sludge bed. The application of aerobic/anoxic biofilter as a sole polishing step for psychrophilic anaerobic effluents was acceptable for elimination of biodegradable COD and nitrogen approaching the current standards for direct discharge of treated wastewater.

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“…For example, the treatment of textile wastewater by using an UASB reactor allowed to achieve COD removal efficiency of 9% to 51% [31]. The treatment of starch wastewater resulted in a reduction of COD in the range of 77% to 93% [32]. Other studies examined the effects of OLRs (0.82 and 6.11 g COD/L•d) and HRT ranging from 4.1 d to 1.7 d on UASB reactor performance using wastewater with a COD concentration of 10 g/L [33].…”

Section: Organic Compounds and Nutrient Removalmentioning

confidence: 99%

Evaluation of Anaerobic Digestion of Dairy Wastewater in an Innovative Multi-Section Horizontal Flow Reactor

et al. 2020

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The aim of this study was the performance evaluation of anaerobic digestion of dairy wastewater in a multi-section horizontal flow reactor (HFAR) equipped with microwave and ultrasonic generators to stimulate biochemical processes. The effects of increasing organic loading rate (OLR) ranging from 1.0 g chemical oxygen demand (COD)/L·d to 4.0 g COD/L·d on treatment performance, biogas production, and percentage of methane yield were determined. The highest organic compounds removals (about 85% as COD and total organic carbon—TOC) were obtained at OLR of 1.0–2.0 g COD/L·d. The highest biogas yield of 0.33 ± 0.03 L/g COD removed and methane content in biogas of 68.1 ± 5.8% were recorded at OLR of 1.0 g COD/L·d, while at OLR of 2.0 g COD/L·d it was 0.31 ± 0.02 L/COD removed and 66.3 ± 5.7%, respectively. Increasing of the OLR led to a reduction in biogas productivity as well as a decrease in methane content in biogas. The best technological effects were recorded in series with an operating mode of ultrasonic generators of 2 min work/28 min break. More intensive sonication reduced the efficiency of anaerobic digestion of dairy wastewater as well as biogas production. A low nutrient removal efficiency was observed in all tested series of the experiment, which ranged from 2.04 ± 0.38 to 4.59 ± 0.68% for phosphorus and from 9.67 ± 3.36 to 20.36 ± 0.32% for nitrogen. The effects obtained in the study (referring to the efficiency of wastewater treatment, biogas production, as well as to the results of economic analysis) proved that the HFAR can be competitive to existing industrial technologies for food wastewater treatment.

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Combined Biologic (Anaerobic-Aerobic) and Chemical Treatment of Starch Industry Wastewater

Cited by 37 publications

References 7 publications

Kinetic study and hydrogen peroxide consumption of phenolic compounds oxidation by Fenton’s reagent

Kinetic study and hydrogen peroxide consumption of phenolic compounds oxidation by Fenton’s reagent

Combined anaerobic-aerobic treatment of landfill leachates under mesophilic, submesophilic and psychrophilic conditions

Evaluation of Anaerobic Digestion of Dairy Wastewater in an Innovative Multi-Section Horizontal Flow Reactor

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