Enhancement of methane production in mesophilic anaerobic digestion of secondary sewage sludge by advanced thermal hydrolysis pretreatment

Abelleira-Pereira, Jose M.; Pérez-Elvira, S.I.; Sánchez-Oneto, Jezabel; Cruz, Roberto de la; Portela, Juan R.; Nebot, Enrique

doi:10.1016/j.watres.2014.12.027

Cited by 162 publications

(42 citation statements)

References 46 publications

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“…This can be explained due to the low initial content of VFA enhancing more hydrolysis and acidogenesis activity instead of methanogenesis and then more production of VFAs. Anyway, in this work VFA did not produce the inhibition of the process due to initial VFA values were below VFAs inhibiting threshold previously reported [22]. In the case of experiment C, P and F the elimination of VFAs were optimal and in the range of 63-83% typical from sewage anaerobic digestion process.…”

Section: Pre-treatments and Effect In Sludgecontrasting

confidence: 39%

Biomethane production improvement by enzymatic pre-treatments and enhancers of sewage sludge anaerobic digestion

Ágabo-García

Pérez

Rodríguez-Morgado

et al. 2019

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Enzymatic hydrolysis is recognised as an effective pre-treatment for increasing biodegradability of sludge. In this work, isolated commercial enzymes as well as in-situ enzymes producer bacteria were used respectively as enhancers and pre-treatments of sewage sludge. Biodegradability of sample as well as biomethane potential production were studied. Results showed that depuration efficiencies in terms of CODs (73.5-85.5 %) and TVS (28.5-42.7 %) were more than twice the control value. In addition, pretreated samples as well as enhanced samples with enzymes generated more biomethane than control. The optimal ones, were those with the isolated proteases (P) and with bacteria (Bacillus licheniformis) treatment in-situ (F), producing a total volume of 72.4 ± 2.62 ml CH4 and 114 ml ± 0.46 CH4, respectively, increasing the biogas volume in 3.65 and 5.77 times respectively compared with control.

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Section: Pre-treatments and Effect In Sludgecontrasting

confidence: 39%

Biomethane production improvement by enzymatic pre-treatments and enhancers of sewage sludge anaerobic digestion

Ágabo-García

Pérez

Rodríguez-Morgado

et al. 2019

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“…The complex microstructure components such as extracellular polymeric substances make sewage sludge difficult to hydrolyze and digest. These components have low volatile solid degradation (30-50%) even at a long retention time (20-30 day), caused low methane yield (Appels et al, 2008;Pereira et al, 2015). To accelerate the hydrolysis and enhance subsequent methane productivity, a variety of sewage sludge pretreatment options, such as mechanical, thermal, chemical, biological process or integration of these, have been developed at laboratory or pilot level recently (Kim et al, 2010;Houtmeyers et al, 2014;Kinnunen et al, 2015;Zhen et al, 2017).…”

Section: Anaerobic Co-digestion Of Sewage Sludgementioning

confidence: 99%

Treatment of Sewage Sludge Using Anaerobic Digestion in Malaysia: Current State and Challenges

et al. 2019

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“…Pretreatment technologies (e.g., thermal, mechanical, chemical, and biological attack) before anaerobic digestion have been developed to enhance anaerobic methane production by altering the basic properties of sludge (Abelleira-Peraira et al, 2015;Ge et al, 2010;Han and Dague, 1997;Trzcinski et al, 2015;Zheng et al, 2009). For instance, Abelleira-Peraira et al (2015) demonstrated that the methane production of pretreated secondary sludge under 170 C for 5 min was enhanced by 60%. Han and Dague (1997) showed that temperature phased anaerobic digestion (TPAD) (thermophilic-mesophilic) achieved an increase of 16% in the methane production from primary sludge compared to the singlestage mesophilic anaerobic digestion.…”

Section: Introductionmentioning

confidence: 99%

A novel free ammonia based pretreatment technology to enhance anaerobic methane production from primary sludge

Wei

Zhou

Xie

et al. 2017

Biotech & Bioengineering

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This study proposed a novel free ammonia (FA, i.e., NH ) pretreatment technology to enhance anaerobic methane production from primary sludge for the first time. The solubilization of primary sludge was substantially enhanced following 24 h FA pretreatment (250-680 mg NH -N/L), by which the release of soluble chemical oxygen demand (SCOD) (i.e., 0.4 mg SCOD/mg VS added; VS: volatile solids) was approximately 10 times as much as that without pretreatment (i.e., 0.03 mg SCOD/mg VS added). Then, biochemical methane potential (BMP) tests demonstrated that FA pretreatment of 250-680 mg NH -N/L was capable of enhancing anaerobic methane production while the digestion time was more than 7 days. Model based analysis indicated that the improved anaerobic methane production was due to an increased biochemical methane potential (B ) of 8-17% (i.e., from 331 to 357-387 L CH /kg VS added), with the highest B achieved at 420 mg NH -N/L pretreatment. However, FA pretreatment of 250-680 mg NH -N/L decreased hydrolysis rate (k) by 24-38% compared with control (i.e., from 0.29 d to 0.18-0.22 d ), which explained the lower methane production over the first 7 days' digestion period. Economic analysis and environmental evaluation demonstrated that FA pretreatment technology was environmentally friendly and economically favorable. Biotechnol. Bioeng. 2017;114: 2245-2252. © 2017 Wiley Periodicals, Inc.

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Enhancement of methane production in mesophilic anaerobic digestion of secondary sewage sludge by advanced thermal hydrolysis pretreatment

Cited by 162 publications

References 46 publications

Biomethane production improvement by enzymatic pre-treatments and enhancers of sewage sludge anaerobic digestion

Biomethane production improvement by enzymatic pre-treatments and enhancers of sewage sludge anaerobic digestion

Treatment of Sewage Sludge Using Anaerobic Digestion in Malaysia: Current State and Challenges

A novel free ammonia based pretreatment technology to enhance anaerobic methane production from primary sludge

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