Immobilized and MgSO 4 induced cost effective bacterial disintegration of waste activated sludge for effective anaerobic digestion

Ushani, U.; Banu, J. Rajesh; Kavitha, S.; Kaliappan, S.; Yeom, Ikjun

doi:10.1016/j.chemosphere.2017.02.046

Cited by 28 publications

(8 citation statements)

References 32 publications

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“…The SCOD release and COD solubilization percentage indicates the particulate organics solubilization . Figure shows that bacterial pretreatment enhances soluble organic release with increase in pretreatment time.…”

Section: Resultsmentioning

confidence: 92%

“…The SCOD release and COD solubilization percentage indicates the particulate organics solubilization. 35 Figure 3 shows that bacterial pretreatment enhances soluble organic release with increase in pretreatment time. The profile of SCOD release shows an initial rapid release from 0 to 42 h, and a slow release from 56 to 72 h. The progress in solubilization may induce the soluble organics release into the aqueous phase, 20 owing to cell lysis.…”

Section: Cod Solubilizationmentioning

confidence: 99%

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Nano‐layered TiO₂ for effective bacterial disintegration of waste activated sludge and biogas production

Sharmila

Banu

Gunasekaran

et al. 2018

J of Chemical Tech & Biotech

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BACKGROUND Proper management of the huge amount of waste activated sludge generated during the conventional treatment of wastewater is nowadays a major environmental issue. Proper treatment of sludge needs huge investment and proper handling. To address this issue, the immobilized photocatalyst (TiO2) mediated exocellular fractionation of bacterial pretreatment for anaerobic digestion was utilized as a sludge treatment technique. RESULT Ti was deposited on glass substrate by a DC spluttering technique, and a TiO2 layer was formed by annealing in oxygen atmosphere. This immobilized TiO2 efficiently extricated the extracellular components after 45 min by removing 99% of the total extractable extracellular polymeric substances. The exocellular fractionated bacterial pretreatment induced 20% of COD solubilization with methane generation of about 0.0217 g COD g‐1 COD d‐1, which was higher than the sludge without any treatment and sludge with bacterial pretreatment only. CONCLUSION An 8% increase in COD solubilization was achieved, which generated high quantities of methane. With the advantage of methane generation, the maximum profitable sludge reduction was obtained. Thin film deposition of TiO2 enables easy recovery of TiO2. The cost, energy, and solid balance analysis confirmed that this treatment method is field applicable. © 2018 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 92%

Section: Cod Solubilizationmentioning

confidence: 99%

Nano‐layered TiO₂ for effective bacterial disintegration of waste activated sludge and biogas production

Sharmila

Banu

Gunasekaran

et al. 2018

J of Chemical Tech & Biotech

Self Cite

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“…These cavitation expand to unstable size, and then rapidly collapse resulting in temperatures up to 5000 K and pressures up to 180 MPa. The rapid collapse of a numerous microbubbles generates powerful shear forces in the surrounding liquid, which damages the cell walls of microorganisms [21,53]. However, higher sonication power level is reported to adversely affect the pretreatment process.…”

Section: Cavitationmentioning

confidence: 99%

Biomass Pretreatment for Enhancement of Biogas Production

Tamilarasan¹,

Azariah²

2019

Anaerobic Digestion

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Biomass is a renewable energy source developed from living or recently living plant and animal materials, which can be used as fuel. The main components present in biomass are polymers such as carbohydrate, protein, cellulose, lignin and fat. Biogas is produced when the biomass is anaerobically degraded by microorganisms. The process of anaerobic digestion (AD) takes place in four steps: hydrolysis, acidogenesis, acetogenesis, and methanogenesis. The hydrolysis step is rate limiting due to the presence of complex polymers in biomass. Pretreatment is a process in which the biomass is made ready for microbial attack. This pretreatment can be physical operations such as communition, irradiation etc.; chemical treatment with alkali, acids, wet oxidation etc.; biological pretreatment, by fungi or enzymes; or a combination of these processes. During the pretreatment process, the compact structure of biomass is disrupted and exposed which.

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“…The increase in TAN removal is due to the presence of carbon sources presence in the garbage enzyme. The carbon-based particulate will be converted from insoluble substance to soluble substance with the increase in pretreatment time (Ushani, Rajesh Banu, Kavitha, Kaliappan, & Yeom, 2017).…”

Section: Reduction Of Tanmentioning

confidence: 99%

Production and Characterization of Bio Catalytic Enzyme Produced From Fermentation of Fruit and Vegetable Wastes and Its Influence on Aquaculture Sludge

Rasit

Mohammad

2018

mijst

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The aquaculture sludge discharged from shrimp aquaculture industry may result in high organic content and nutrients that are considered as a source of surface and ground pollution. Hence, before disposing, it has to be treated efficiently to reduce its pollutants concentration. Anaerobic digestion technology has been commonly applied for sludge treatment but it requires longer retention time and the efficiency for the overall organic matter degradation is relatively low.Therefore, a pretreatment is usually applied before further anaerobic treatment. This study focused on the production of bio catalytic enzyme from fermentation of fruit and vegetable wastes such as pineapple, mango, orange and tomato dregs to increase the aquaculture sludge stability. The solution of the wastes is known as garbage enzyme. It was produced by three MATTER: International Journal of Science and Technology 13 months' fermentation of molasses, waste and water mixture with the ratio of 1:3:10.Characterization of the enzyme showed that it possessed lipase, amylase and protease activities.All types of fruit and vegetable wastes were pretreated individually at pH 7.0 within the duration of 120 hours and were labelled as pineapple garbage enzyme (PGE), mango garbage enzyme (MGE), orange garbage enzyme (OGE) and tomato garbage enzyme (TGE). The efficiency of the pretreatment was evaluated based on the removal of total suspended solid (TSS), volatile suspended solid (VSS), chemical oxygen demand (COD) and total ammonia nitrogen (TAN). A higher removal of all parameters was observed in all pretreated experiments. The pineapple garbage enzyme performed a greater reduction of TSS and VSS within the range of 54 percent to 72 percent. COD removal efficiency was higher in pineapple and orang garbage enzyme with 82 percent and 88 percent removal, respectively. While for TAN, orange garbage enzyme showed a higher reduction with 65 percent removal. These findings proved that enzyme solution produced from fruit and vegetable wastes have the potential to pretreat aquaculture sludge when the reduction of selected parameters were observed and this will help reducing shock lock or inhibition prior to anaerobic digestion.

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Immobilized and MgSO 4 induced cost effective bacterial disintegration of waste activated sludge for effective anaerobic digestion

Cited by 28 publications

References 32 publications

Nano‐layered TiO₂ for effective bacterial disintegration of waste activated sludge and biogas production

Nano‐layered TiO₂ for effective bacterial disintegration of waste activated sludge and biogas production

Biomass Pretreatment for Enhancement of Biogas Production

Production and Characterization of Bio Catalytic Enzyme Produced From Fermentation of Fruit and Vegetable Wastes and Its Influence on Aquaculture Sludge

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Immobilized and MgSO 4 induced cost effective bacterial disintegration of waste activated sludge for effective anaerobic digestion

Cited by 28 publications

References 32 publications

Nano‐layered TiO2 for effective bacterial disintegration of waste activated sludge and biogas production

Nano‐layered TiO2 for effective bacterial disintegration of waste activated sludge and biogas production

Biomass Pretreatment for Enhancement of Biogas Production

Production and Characterization of Bio Catalytic Enzyme Produced From Fermentation of Fruit and Vegetable Wastes and Its Influence on Aquaculture Sludge

Contact Info

Product

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About

Nano‐layered TiO₂ for effective bacterial disintegration of waste activated sludge and biogas production

Nano‐layered TiO₂ for effective bacterial disintegration of waste activated sludge and biogas production