Color removal of melanoidin-rich industrial effluent by natural manganese oxides

Arimi, Milton M.; Zhang, Yongjun; Geißen, Sven‐Uwe

doi:10.1016/j.seppur.2015.07.013

Cited by 36 publications

(24 citation statements)

References 23 publications

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“…Vinasse is dark brown due to the high concentration of pigmented chemicals such as polyphenols (tannic and humic acids), furfurals from acid hydrolysis, caramel from the decomposition of heated sugar, nitrogenous polymers and copolymers called melanoidins. The melanoidins are produced from the Maillard reaction, that is a complex nonenzymatic reaction between amino and carbonyl groups from intermediates substances, which results in polymerization . After MFCs treatment were observed a decolorization of the vinasse, a decrease in the smell as well as a partial removal of suspended solids.…”

Section: Resultsmentioning

confidence: 99%

High strength bioethanol wastewater inoculated with single‐strain or binary consortium feeding air‐cathode microbial fuel cells

Marassi

Igreja

Uchigasaki

et al. 2018

Env Prog and Sustain Energy

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Bioethanol industries generate a large volume of high strength wastewater called vinasse. This study compares the performance of microbial fuel cells (MFCs), inoculated with a single‐strain or a binary consortium, to produce bioelectricity while simultaneously reducing the COD levels and removing the vinasse color. The MFCs achieved the power density of 124.0 ±0.2 mW/m2 when inoculated with a strain of Shewanella oneidensis (MFC/So) and 178.0 ±0.8 mW/m2 after inoculation with a strain of Clostridium butyricum (MFC/Cb). However, a better performance in power density was reached by the MFC inoculated with both cultures (MFC/So‐Cb), which produced 205.0 ±0.5 mW/m2. Additionally, the results showed a decrease in the initial COD (36,440 mg/L), as well as a decolorization. Thus, the MFC/So, MFC/Cb, and MFC/So‐Cb caused a reduction in COD by 41.8 ± 2.4%, 20.1 ± 4.4%, and 53.8 ± 5.9%, respectively, and in color by 62 ± 4%, 70 ± 4%, and 58 ± 5%, respectively. These findings demonstrate that high power density can be produced using raw vinasse as a substrate in air‐cathode MFCs. However, the coulombic efficiency was low indicating that the COD conversion into electricity must be improved. Novelty: This work combines fermentative and metal‐reducing bacteria, instead of mixed cultures with unknown microorganisms, to break down complex organics in the vinasse, simultaneously to electricity generation. No studies have been found concerning Shewanella oneidensis and Clostridium butyricum strains for harvesting bioelectricity from bioethanol wastewater. Second, different from early studies, this work uses the real high strength wastewater, without dilution or any pre‐treatment, before MFC process. Third, here we consider the total biomass at the end process to calculate the COD removal rate. Finally, we employed electronic load, never used previously, in MFC polarization measurements. © 2018 American Institute of Chemical Engineers Environ Prog, 38: 380–386, 2019

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Section: Resultsmentioning

confidence: 99%

High strength bioethanol wastewater inoculated with single‐strain or binary consortium feeding air‐cathode microbial fuel cells

Marassi

Igreja

Uchigasaki

et al. 2018

Env Prog and Sustain Energy

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“…38,47 uma vez que nem todas as espécies são capazes de crescer em meios ou substratos adversos. 57 Sendo assim, a busca por microalgas mais resistentes e que tolerem as características físico-químicas e nutricionais da vinhaça sem o comprometimento da produtividade torna-se necessária para o sucesso do cultivo microalgal.…”

Section: Vinhaçaunclassified

Microalgae and Biofuels: Integration of Productive Chains

Monçao

Sartori²,

Veloso³

et al. 2018

Rev. Virtual Quim

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The microalgae biofuels are considered a technically feasible alternative to supply the demands of the automotive, aviation and energy sectors. However, the costs associated with cultivation and processing still limit the scale-up of biomass production and its conversion into biofuels. One of the barriers associated with microalgae cultivation is the cost of nutrients used in heterotrophic and mixotrophic cultures. In this review were described and analyzed initiatives to explore effluents or coproducts from production chains of bioethanol and biodiesel for use as sources of nutrients for the cultivation of microalgae. With the purpose of reducing costs and integrating convergent agroindustrial chains, were evaluate the use of vinasse from the first generation of bioethanol plants, hemicellulosic hydrolyzate from the acid pretreatment of sugarcane bagasse, crude glycerol produced by the transesterification of oils and fats and washing water of biodiesel for the production of algal biomass.

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“…By contrast, manganese ores consisting of multivalent manganese oxides could be a substitute because of abundant reserves in nature. Recently, studies have demonstrated the good degradation efficiency of organic contaminants by natural manganese oxides (MnO x ), such as diclofenac [34], melanin [35] and paracetamolin [36] and emerging organic contaminants [37]. MnO x was also extensively used in drinking water treatment for the removal of iron and manganese [38].…”

Section: Introductionmentioning

confidence: 99%

Degradation of methylene blue by natural manganese oxides: kinetics and transformation products

Zhou

et al. 2019

R. Soc. open sci.

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In this study, natural manganese oxides (MnO x ), an environmental material with high redox potential, were used as a promising low-cost oxidant to degrade the widely used dyestuff methylene blue (MB) in aqueous solution. Although the surface area of MnO x was only 7.17 m 2 g −1 , it performed well in the degradation of MB with a removal percentage of 85.6% at pH 4. It was found that MB was chemically degraded in a low-pH reaction system and the degradation efficiency correlated negatively with the pH value (4–8) and initial concentration of MB (10–50 mg l −1 ), but positively with the dosage of MnO x (1–5 g l −1 ). The degradation of MB fitted well with the second-order kinetics. Mathematical models were also built for the correlation of the kinetic constants with the pH value, the initial concentration of MB and the dosage of MnO x . Furthermore, several transformation products of MB were identified with HPLC-MS, which was linked with the bond energy theory to reveal that the degradation was initiated with demethylation.

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Color removal of melanoidin-rich industrial effluent by natural manganese oxides

Cited by 36 publications

References 23 publications

High strength bioethanol wastewater inoculated with single‐strain or binary consortium feeding air‐cathode microbial fuel cells

High strength bioethanol wastewater inoculated with single‐strain or binary consortium feeding air‐cathode microbial fuel cells

Microalgae and Biofuels: Integration of Productive Chains

Degradation of methylene blue by natural manganese oxides: kinetics and transformation products

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