Visible light photocatalytic disintegration of waste activated sludge for enhancing biogas production

Anjum, Muzammil; Al-Talhi, Hasan A.; Mohamed, Saleh A.; Kumar, Rajeev; Barakat, M.A.

doi:10.1016/j.jenvman.2017.07.064

Cited by 30 publications

(5 citation statements)

References 45 publications

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“…The possibility to increase methane production bỹ 200% with a combination of micro aerobic hydrolysis and the addition of trace metals has also been reported [90]. Anjum et al [91] recently reported the possibility to enhance the biogas production using photocatalytic disintegration of WAS, whereby this procedure increased the biogas production by 1.6 times. It should be noted that whereas the hydroxyl radical pre-treatment of WAS have been known for some time, sulphate radical pre-treatment (activated peroxydisulfate or peroxymonosulphate (persulphates)) has only been introduced in the last few years; however, several limitations disable their in situ application.…”

Section: Chemicalmentioning

confidence: 87%

Disintegration of Wastewater Activated Sludge (WAS) for Improved Biogas Production

et al. 2018

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Due to rapid urbanization, the number of wastewater treatment plants (WWTP) has increased, and so has the associated waste generated by them. Sustainable management of this waste can lead to the creation of energy-rich biogas via fermentation processes. This review presents recent advances in the anaerobic digestion processes that have led to greater biogas production. Disintegration techniques for enhancing the fermentation of waste activated sludge can be apportioned into biological, physical and chemical means, which are included in this review; they were mainly compared and contrasted in terms of the ensuing biogas yield. It was found that ultrasonic- and microwave-assisted disintegration provides the highest biogas yield (>500%) although they tend to be the most energy demanding processes (>10,000 kJ kg−1 total solids).

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Section: Chemicalmentioning

confidence: 87%

Disintegration of Wastewater Activated Sludge (WAS) for Improved Biogas Production

et al. 2018

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“…The possibility to increase methane production by ~200% with a combination of micro aerobic hydrolysis and the addition of trace metals has also been reported [85]. Anjum et al [86] recently reported the possibility to enhance the biogas production using photocatalytic disintegration of WAS, whereby this procedure increased the biogas production by 1.6 times.…”

Section: Chemicalmentioning

confidence: 84%

Disintegration of Wastewater Activated Sludge (WAS) for Improved Biogas Production: A Mini Review

Grűbel¹,

Silvestri²,

Vv³

et al. 2018

Preprint

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Due to rapid urbanization, the quantity of wastewater treatment plants (WWTP) has increased, and with it the amount of waste generated by them. Sustainable management of this waste can lead to the creation of energy-rich biogas through the fermentation process. This review presents recent advances in the anaerobic digestion process resulting in greater biogas production. Disintegration techniques for enhancing waste activated sludge fermentation can be generally partitioned into biological, physical and chemical, each of which are covered in this review. These disintegration techniques were compared mainly in terms of their biogas yield. It was found that ultrasonic and microwave disintegration provides the highest biogas yield (>500%); however, they are also the most energy demanding (>10,000 kJ kg-1 total solids).

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“…Numerous techniques for sewage sludge treatment have been developed, including mechanical [6] and thermal treatment [7,8], chemical methods [9,10], microbiological treatment [11], ultrasound treatment [12], and microwave treatment [13]. These methods are capable of effectively achieving sewage sludge dewatering, although they also present certain limitations, including extended processing times, elevated costs, and limited utilization rates.…”

Section: Introductionmentioning

confidence: 99%

Excess Sludge Disintegration by Discharge Plasma Coupled with Thiosulfate

Jin,

Lin,

Yang

et al. 2023

Water

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Surplus sludge disposal and treatment are major issues in wastewater treatment plants. Discharge plasma oxidation is an effective approach for sludge dewatering and digestion. In this study, excess sludge disintegration by non-thermal discharge plasma coupled with thiosulfate (TSA) was investigated. After 20 min of the single discharge plasma treatment, the soluble chemical oxygen demand (SCOD) increased to 404.93 mg L−1, and it climbed even more to 549.08 mg L−1 after adding 15 mmol L−1 of TSA. The water content of the filter cake also reduced even more in the presence of TSA. There was an appropriate dosage of TSA available. In the discharge plasma coupled with TSA system, reactive oxygen species (·OH and O2−) were generated and had significant involvement in the disintegration of the sludge. The addition of TSA enhanced the production of OH. These reactive oxygen species decomposed the floc structures and facilitated the transformation of organic compounds, resulting in a decrease in the average size of the sludge aggregates. The ratio of soluble extracellular polymer substances (S-EPS) was enhanced, while the ratio of the tightly bound fraction was reduced after the treatment. Thus, discharge plasma coupled with TSA promoted microbial cell lysis and facilitated the release of intracellular organic matter and bound water, ultimately enhancing the sludge’s dewaterability.

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Visible light photocatalytic disintegration of waste activated sludge for enhancing biogas production

Cited by 30 publications

References 45 publications

Disintegration of Wastewater Activated Sludge (WAS) for Improved Biogas Production

Disintegration of Wastewater Activated Sludge (WAS) for Improved Biogas Production

Disintegration of Wastewater Activated Sludge (WAS) for Improved Biogas Production: A Mini Review

Excess Sludge Disintegration by Discharge Plasma Coupled with Thiosulfate

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