Sugarcane molasses-based bio-ethanol wastewater treatment by two-phase multi-staged up-flow anaerobic sludge blanket (UASB) combination with up-flow UASB and down-flow hanging sponge

Choeisai, Pairaya; Jitkam, N.; Silapanoraset, K.; Yubolsai, C.; Yoochatchaval, Wilasinee; Yamaguchi, Takashi; Onodera, Takashi; Syutsubo, Kazuaki

doi:10.2166/wst.2013.794

Cited by 13 publications

(4 citation statements)

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“…The increase in OLR in series 4 led to a decrease in pH to the average level of pH 6.31 ± 0.11, growth in FOS/TAC ratio to 0.51, and a reduction in biogas production to the level of 0.18 ± 0.009 L CH4/d (0.16 ± 0.008 L CH4/g COD removed) (Table 5, Figure 4). The efficiency of organic compound removal determines the yield of methane produced and generally, a higher COD removal indicates a better conversion of organic compounds into biogas components [47]. In stage 2, the highest organic compound removal of about 75% as COD was obtained at OLRs ranging from 5.0 to 6.0 g COD/L•d, and at OLR of 7.0 g COD/L•d it dropped to 61.6 ± 4.4% (Table 6, Figure 5).…”

Section: Resultsmentioning

confidence: 99%

Methane Production from Confectionery Wastewater Treated in the Anaerobic Labyrinth-Flow Bioreactor

et al. 2023

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Production and consumption of confectionery products have increased worldwide, thus, effective management of wastewater produced is now an important issue. The confectionery high-load sewage was explored for biogas production in an innovative-design anaerobic reactor with labyrinth flow. The experimental studies were focused on determining the best technological parameters of anaerobic digestion for the effective removal of pollutants and obtaining high CH4 production efficiency. It was found that organic loading rate (OLR) of 5.0–6.0 g COD/L·d contributed to the highest CH4 generation of 94.7 ± 6.1 to 97.1 ± 5.1 L CH4/d, which corresponded to a high COD removal of 75.4 ± 1.5 to 75.0 ± 0.6%. Under such conditions the FOS/TAC ratio was below 0.4, indicating reactor stability, and pH was on the level of 7.15 ± 0.04 at OLR 5.0 g COD/L·d and 7.04 ± 0.07 at OLR 6.0 g COD/L·d.

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Section: Resultsmentioning

confidence: 99%

Methane Production from Confectionery Wastewater Treated in the Anaerobic Labyrinth-Flow Bioreactor

et al. 2023

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“…Au fost dezvoltate unele metode standardizate pentru a evalua generarea de produse secundare și reziduuri în ciclul de producție a alcoolului, pentru a minimiza impactul negativ a acestora [36][37][38]. Conținutul ridicat de apă în deșeurile organice, precum și conținutul ridicat de zahăr fermentabil în biomasă umedă implică tratarea sau recuperarea obligatorie a acestora, care este totuși destul de costisitoare [38].…”

Section: Introducereunclassified

Study of the redox processes in biochemical systems in the presence of antioxidants

Duca,

Covaliov,

Covaliova

et al. 2023

Redox Processes With Electron and Proton Transfer

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Waste from the agro-industrial sector, due to its toxic effects on plants and living organisms, cannot be thrown into the ground. At the same time, they can also serve as a renewable source of value-added products, which can be obtained following specific biochemical treatment. This research focused on studies of biomass fermentation processes in the presence of bioactive substances introduced directly into the digested biomass. The study of the effects of bioactive substances with possible antioxidant properties on the biomass of the wine sector with the identification of the mechanisms of these processes represents a direction of perspective, suggesting new ways of valorizing waste. The obtained results show that the biologically active substances of natural origin used as additives in the vinasse digestion process demonstrate pronounced effects on the alcoholic fermentation of vinasse under mesophilic conditions. The comparative evaluation of the action of different additions in the studied processes demonstrated that dihydroxyfumaric acid determined the emission of 266 cm3 CO2 in 76 hours, aescinum – 251 cm3 in 55 hours, tomatine – 233 cm3 in 78 hours, sclareol – 232 cm3 in 55 hours. hours, vanillin – 229 cm3 during 69 hours, while catechin – 180 cm3 during 61 hours of fermentation, until the fermentation process is completed. It was shown that the addition of complex compounds and Co(III) allows obtaining cobalamin (vitamin B12) in the semi-solid fraction formed after fermentation. As a result of the treatment, CCOCr and CBO5 values were reduced by 96.6-97.8%. Also, two preparations were developed for the treatment of organic waste: one for removing the unpleasant smell of semi-solid sludge resulting from municipal wastewater treatment, by inhibiting the development of thiol substances formed as a result of the vital action of microorganisms from the digestate formed, and the other the second preparation - for deworming stabilized sewage treatment sludge using juglon. Both technological processes can be recommended for practical application.

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“…To break down the waste biomass into sugars that can be further converted into the gas or liquid biofuels, or other useful products, the biochemical conversion by microorganisms and enzymes is often used [29][30][31], although the other approaches such as coagulation and oxidation have been also proposed [32]. Generally, biochemical digestion is rather slow process that requires some time for biomass transformation into the products.…”

Section: Introductionmentioning

confidence: 99%

Effect of Bioactive Additives on Biomass Fermentation From Agro-Industrial Sector

Duca¹,

Covaliova²,

Covaci³

et al. 2022

JES

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Wastes from the agro-industrial sector, due to their toxic effects with regard to plants and living organisms, cannot be dumped in the soil. However, they can serve as renewable source of value-added products, following the specific digestive treatment. This research was focused on studies of vinasse fermentation processes in the presence of bioactive substances introduced directly into the digested biomass. The results obtained testify that the substances of natural origin used as additives, demonstrate the pronounced effects on alcoholic fermentation of vinasse under the mesophilic conditions. The comparative assessment of different additives action in the studied processes have demonstrated that the dihydroxyfumaric acid caused the emission of 266 cm3 CO2 in 76 hours, aescinum – 251 cm3 in 55 hours, tomatin – 233 cm3 during 78 hours, sclareol – 232 cm3 during 55 hours, vanillin – 229 cm3 during 69 hours, whereas catechin – 180 cm3 during 61 hours of fermentation, until the fermentation process was completed. Thus, the study of the effects of bioactive substances with possible antioxidant properties on biomass from winemaking sector with identification of these processes mechanisms can be a perspective direction, suggesting the new ways of wastes valorisation.

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Sugarcane molasses-based bio-ethanol wastewater treatment by two-phase multi-staged up-flow anaerobic sludge blanket (UASB) combination with up-flow UASB and down-flow hanging sponge

Cited by 13 publications

References 0 publications

Methane Production from Confectionery Wastewater Treated in the Anaerobic Labyrinth-Flow Bioreactor

Methane Production from Confectionery Wastewater Treated in the Anaerobic Labyrinth-Flow Bioreactor

Study of the redox processes in biochemical systems in the presence of antioxidants

Effect of Bioactive Additives on Biomass Fermentation From Agro-Industrial Sector

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