Lab-scale demonstration of recuperative thickening technology for enhanced biogas production and dewaterability in anaerobic digestion processes

Cobbledick, Jeffrey; Aubry, Nicholas; Zhang, Victor; Rollings-Scattergood, Sasha; Latulippe, David R.

doi:10.1016/j.watres.2016.02.051

Cited by 18 publications

(4 citation statements)

References 19 publications

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“…In this study, AD kinetics were not biomass limited and thus more determined by the available substrate concentrations, which were similar for both systems during Phase I (Table 1, soluble digestate concentrations). Similarly, application of RT on digesters already operating at the necessary SRT showed no improvement in previous studies (Cobbledick, Aubry, Zhang, Rollings-Scattergood, & Latulippe, 2016;Ngwenya et al, 2015;Xue et al, 2015). The necessary SRT needed for THP-AD systems has not been defined clearly in the literature.…”

Section: Discussionmentioning

confidence: 88%

“…Given the RT procedure and polymer dose needed for final dewatering, the RT system as applied in this study was using about 2.8 times more polymer overall than the conventional THP-AD system. Although better dewaterability in RT digester was reported before (Cobbledick et al, 2016), the operational cost for RT will need to be optimized and weighted against the capital investment.…”

Section: Recuperative Thickening To Increase Throughput Ratesmentioning

confidence: 99%

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Recuperative thickening for sludge retention time and throughput management in anaerobic digestion with thermal hydrolysis pretreatment

Romero

Wadhawan³

et al. 2019

Water Environment Research

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This study evaluated the application of recuperative thickening (RT) to enhance anaerobic digestion (AD) performance for AD systems with thermal hydrolysis pretreatment (THP). RT was applied for two different reasons: (a) for increasing the sludge retention time (SRT) to degrade slowly hydrolyzable materials more efficiently and (b) for maintaining SRT at decreased hydraulic retention time (HRT) thus showing potential for increased AD throughput rates. A SRT increase from 15 to 30 days by RT application did not improve AD performance or hydrolysis rates significantly as 15‐day SRT was already a factor 2 higher than the estimated washout SRT. When applying RT to increase throughput rates (HRT of 7 days) while maintaining 15‐day SRT, no negative impact on biogas production or hydrolysis kinetics was observed. It was estimated that RT application on THP digesters can increase digester throughput by 100% and thus show clear potential for further AD intensification. Practitioner points Increased SRT from 15 to 30 days through recuperative thickening application did not improve biogas production. A lower required minimum SRT (6–7 days) was estimated in THP‐AD systems compared to conventional AD. Operation at decreased HRT by RT application resulted in similar AD performance under constant organic loading rates. A 100% increase in throughput rates can be applied using RT without decreasing AD performance.

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Section: Discussionmentioning

confidence: 88%

Section: Recuperative Thickening To Increase Throughput Ratesmentioning

confidence: 99%

Recuperative thickening for sludge retention time and throughput management in anaerobic digestion with thermal hydrolysis pretreatment

Romero

Wadhawan³

et al. 2019

Water Environment Research

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“…The first cluster, in red, which brings together the greatest number of keywords (147), refers to recuperative technologies, the main objective of which is to reduce the use of energy in the production process through reuse, thus reducing the amount of gases emitted. Numerous studies address the development of recuperative technology in mineral resources, such as natural gas (Nikpey et al, 2014;Abdul-Qyyum et al, 2018), biogas (Cobbledick et al, 2016;Yang et al, 2017), coal (Kuchonthara et al, 2005), and oil (Kansha et al, 2012), among others.…”

Section: Keyword Analysismentioning

confidence: 99%

The Main Research Characteristics of the Development of the Concept of the Circular Economy Concept: A Global Analysis and the Future Agenda

Meseguer-Sánchez

Gálvez‐Sánchez

Moreno

et al. 2021

Front. Environ. Sci.

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In recent years, the concept of the Circular Economy has acquired greater traction, both in the research community and in wider society, as an instrument that provides innumerable methodologies with which to face the environmental, social, and environmental challenges caused by the linear production model. This study focuses on analyzing the degree of advancement of the Circular Economy in the scientific field through a bibliometric analysis (or scientometrics) of 5,007 research articles available in Scopus database and published during the period 2005–2007. The main research characteristics are presented, and the Paris Climate Conference (COP21), held on December 12, 2015, is highlighted as a key driver of this particular line of research. The analysis revealed the main authors, journals, subject area, countries and current and future lines of research, finding that the Circular Economy is a paradigm with environmental, economic and social implications, both for the productive system and for consumers.

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“…Using conventional dissolved air flotation (DAFT) for sludge thickening, Reynolds et al, (2001) observed improvement in biogas production by up to 110% and volatile solid (VS) reduction by 15-30% due to recuperative thickening. Similarly, Cobbledick et al, (2016) conducted a lab-scale demonstration of recuperative thickening anaerobic digestion using a gravity thickening process (no shearing) and observed on average 10% increase in biogas yield compared to the control system (no recuperative thickening).…”

Section: Introductionmentioning

confidence: 99%

Effects of shearing on biogas production and microbial community structure during anaerobic digestion with recuperative thickening

Yang

Phan

Bustamante

et al. 2017

Bioresource Technology

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Lab-scale demonstration of recuperative thickening technology for enhanced biogas production and dewaterability in anaerobic digestion processes

Cited by 18 publications

References 19 publications

Recuperative thickening for sludge retention time and throughput management in anaerobic digestion with thermal hydrolysis pretreatment

Recuperative thickening for sludge retention time and throughput management in anaerobic digestion with thermal hydrolysis pretreatment

The Main Research Characteristics of the Development of the Concept of the Circular Economy Concept: A Global Analysis and the Future Agenda

Effects of shearing on biogas production and microbial community structure during anaerobic digestion with recuperative thickening

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