Enhancing the functional and economical efficiency of a novel combined thermo chemical disperser disintegration of waste activated sludge for biogas production

Kavitha, S.; Jayashree, C.; Kumar, S. Adish; Kaliappan, S.; Banu, J. Rajesh

doi:10.1016/j.biortech.2014.09.078

Cited by 84 publications

(32 citation statements)

References 29 publications

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“…In the Fenton process, during the sludge disintegration, the SCOD release was simultaneously followed by its mineralization, which is the reason for low SCOD values (Mo et al 2015). However, compared to other sludge disintegration methods such as physical, chemical and biological methods, the SCOD of the sludge remains high in the order of 2000 to 5000 mg/L which is due to the focus SCOD release only (Merlin et al 2014;Kavitha et al 2014b;Bougrier et al 2005). …”

Section: Total Cod Reduction and Suspended Solids Reductionmentioning

confidence: 99%

Effect of deflocculation on the efficiency of sludge reduction by Fenton process

Amudha

Kavitha

Fernandez

et al. 2016

Environ Sci Pollut Res

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Section: Total Cod Reduction and Suspended Solids Reductionmentioning

confidence: 99%

Effect of deflocculation on the efficiency of sludge reduction by Fenton process

Amudha

Kavitha

Fernandez

et al. 2016

Environ Sci Pollut Res

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“…could effectively solve the WAS problems, the effects followed are not friendly to both environment and ecosystem. 1,10,11 Meanwhile, costs of treatment methods mentioned above are very high, accounting for approximately 40-60% operation cost of WWTPs. 10 Thus, it is particularly important to develop effective and environmental techniques for WAS treatment.…”

Section: Introductionmentioning

confidence: 99%

“…[8][9][10][11][12][13][14][15] With the purpose to enhance the performance of AD process, a series of researches on WAS pretreatment have been done, aiming to improve WAS hydrolysis, such as biological, chemical, mechanical and codigestion, etc. 9,12,[16][17][18] In order to further improve WAS utilization, some previous studies have reported that it is possible to make the fermented liquid (mainly consisted of soluble protein, soluble carbohydrate, volatile fatty acids (VFAs), etc.)…”

Section: Introductionmentioning

confidence: 99%

Toward bioenergy recovery from waste activated sludge: improving bio-hydrogen production and sludge reduction by pretreatment coupled with anaerobic digestion–microbial electrolysis cells

Zhou

Yang

et al. 2015

RSC Adv.

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aIn this study, a novel technology named pretreatment coupled with anaerobic digestion-microbial electrolysis cells (AD-MECs) for waste activated sludge (WAS) reduction and renewable bioenergy recovery has been investigated. The results showed that, compared with the control pretreatment, the three pretreatment methods used greatly enhanced the performance of the AD-MECs process, and efficient sludge reduction was achieved, especially in heat-alkaline pretreatment, 36.9% and 46.7% for total suspended solid (TSS) and volatile suspended solid (VSS) removal in 6 days. MECs fed with fermented WAS, displayed positive potential for bioenergy recovery, and the highest bio-hydrogen yield was 20.30 mg H 2 /g VSS. Kinetic models indicated that with initial concentrations of soluble organic matter increasing, the bio-hydrogen yields of MECs increased linearly (R 2 ¼ 0.8903-0.9742). The results above suggested that the novel technology proposed in this work showed attractive potential for renewable bioenergy recovery and sludge reduction.

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“…The characterisation of a type of sludge helps wastewater engineers to choose an affordable and suitable form of handling. Sludge management is considered a critical step because of the high-budget demand (Kavitha et al 2014). Technical progress has assumed this precept, launching novel strategies in composting, aerobic digestion and anaerobic digestion (Tchobanoglous et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Differences in soluble COD and ammonium when applying ultrasound to primary, secondary and mixed sludge

Negral

Marañón

Castrillón

et al. 2015

Water Science & Technology

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Ultrasound treatment is often applied to enhance the anaerobic digestion of sludge. Optimal conditions for organic matter solubilisation of primary, secondary and mixed sludge were assessed by implementing ultrasound disruption at different specific energies (from 3,500 to 21,000 kJ/kgTS). The variation in soluble chemical oxygen demand (sCOD) and ammonium nitrogen (NH 4 + -N) was monitored following the treatment and after a subsequent fermentation (24 hours, 37°C). The effect of the treatment was clearly more pronounced in secondary sludge than in the other types of sludge. Relatively minimum values in solubility were found when applying ultrasound at different energies depending on the sludge (3,500-7,000 kJ/kgTS in primary sludge and 10,500-14,000 kJ/kgTS in secondary sludge). This minimum was not so noticeable in mixed sludge. The addition of inoculum was not required after ultrasound disruption to perform the subsequent fermentation. After this final stage, no general pattern in terms of sCOD was observed. Increases and decreases were conditioned by the coverage of the ultrasound irradiation. NH 4 + -N values increased notably during the fermentation.

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Enhancing the functional and economical efficiency of a novel combined thermo chemical disperser disintegration of waste activated sludge for biogas production

Cited by 84 publications

References 29 publications

Effect of deflocculation on the efficiency of sludge reduction by Fenton process

Effect of deflocculation on the efficiency of sludge reduction by Fenton process

Toward bioenergy recovery from waste activated sludge: improving bio-hydrogen production and sludge reduction by pretreatment coupled with anaerobic digestion–microbial electrolysis cells

Differences in soluble COD and ammonium when applying ultrasound to primary, secondary and mixed sludge

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