Size effect of anaerobic granular sludge on biogas production: A micro scale study

Wu, Jing; Afridi, Zohaib Ur Rehman; Zhi, Cao; Zhang, Zhong Liang; Poncin, Souhila; Li, Huai Z.; Zuo, Jian E.; Wang, Kai Jun

doi:10.1016/j.biortech.2015.12.006

Cited by 56 publications

(31 citation statements)

References 26 publications

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“…The development of sludge granulation is one of the important factors contributed towards the successful operation in UASB [41]. This finding is consistent with the founding by Zhao et al, [42] and Wu et al, [43], whom reported that the pollutants removal efficiency (i.e: COD) was improved by utilizing the granular sludge in wastewater treatment and the size of sludge granule could be proportional with the production of biogas.…”

Section: Biodegradability Of Rice Straw Leachatesupporting

confidence: 88%

Assessment of potential biogas production from rice straw leachate in upflow anaerobic sludge blanket reactor

Rosli¹,

Idrus²,

N.³

et al. 2016

ijsgce

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This study evaluates the potential of Rice Straw Leachate (RSL) to generate biogas and investigate its biodegradability by determining the differences between the theoretical yield and the actual one at its increasing organic loading rate. Seven litre working volume of Up-Flow Anaerobic Sludge Blanket (UASB) reactor is employed under mesophilic condition at temperature of 38 for approximately 17 consecutive weeks. The process performance was evaluated based on the efficiency of COD removal and Specific Methane Production (SMP) in relation to the other parameters such as pH, Organic Loading Rate (OLR), Total Ammonia Nitrogen (TAN) and alkalinity ratio. The OLR were varied at 0.43, 0.55, 0.9 and 1.55g COD/L/d with average COD removal of 79%, 81.2%, 76.1%, and 75.8% respectively. The stability of anaerobic digestion of RSL in UASB was found maintained at an increasing OLR with indicator of pH, TAN and IA/PA ratio that always maintain in the range of 6.5-6.8, below 200mg/L and 0.3 respectively. Meanwhile, the optimum average SMP and COD removal efficiency were 0.18L CH 4 g -1 COD rem and 81.2% respectively, at applied OLR of 0.55g COD/L/d. This study also revealed a relatively high deviation of SMP from its theoretical value, indicating its low degradability and the limitation of nutrient factors present in RSL.

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Section: Biodegradability Of Rice Straw Leachatesupporting

confidence: 88%

Assessment of potential biogas production from rice straw leachate in upflow anaerobic sludge blanket reactor

Rosli¹,

Idrus²,

N.³

et al. 2016

ijsgce

View full text Add to dashboard Cite

show abstract

“…BMP tests are influenced by inoculum characteristics (origin, concentration, activity), experimental conditions (gas measurement system, operational parameters, chemical parameters, inoculum to substrate ratio) and, in scientific literature, a lack of uniformity emerges in reported data 14 . Moreover, when dealing with granular sludge, it was underlined that the size of the granules significantly influences biogas production 15 . AMPTS (automatic methane production test system) apparatus was used for the tests; on laboratory scale and in batch mode this equipment is useful for simulation of the anaerobic digestion process, giving useful indications about total methane yield and methane production rate from selected substrates.…”

Section: Introductionmentioning

confidence: 99%

Characterization and BMP Tests of Liquid Substrates for High-rate Anaerobic Digestion

Mainardis

Cabbai

Zannier³

et al. 2018

Chem.Biochem.Eng.Q.

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This work was focused on the physicochemical characterization and biochemical methane potential (BMP) tests of some liquid organic substrates, to verify if they were suitable for undergoing a process of high-velocity anaerobic digestion. The selected substrates were: first and second cheese whey, organic fraction of municipal solid waste (OFMSW) leachate, condensate water and slaughterhouse liquid waste. Firstly, a physicochemical characterization was performed, using traditional and macromolecular parameters; then, batch anaerobic tests were carried out, and some continuous tests were planned.The results revealed that all the analyzed substrates have a potential to be anaerobically treated. Valuable information about treatment rate for a high-velocity anaerobic digestion process was obtained. Start-up of a lab-scale UASB reactor, treating diluted cheese whey, was successfully achieved with good COD removal efficiency. These preliminary results are expected to be further investigated in a successive phase, where continuous tests will be conducted on condensate water and OFMSW leachate.

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“…Anaerobic granules have desirable settling characteristics, enabling the biomass to be maintained inside of the reactor, thus making the HRT independent of the SRT (Karadag et al, 2015). Anaerobic digesters that utilize granules are the highest efficiency reactors to treat high strength organic wastewater and produce biogas (Soto et al, 2011;Baeta et al, 2012;Wu et al, 2016).…”

Section: Anaerobic Granular Reactorsmentioning

confidence: 99%

“…Anaerobic granules contain a well-developed pore structure, allowing fluid flow through the granule and the mass transfer of essential nutrients (Wu et al, 2016). The porous structure of a granule consists of a connected system with many branches similar to a system of arteries.…”

Section: Anaerobic Granule Characteristicsmentioning

confidence: 99%

“…The porous structure of a granule consists of a connected system with many branches similar to a system of arteries. An anaerobic granule typically has a wide main channel with many small sized sub-channels merging into bigger ones eventually connecting to the main channel (Wu et al, 2016). The size and length of a granules' channels depends on its diameter.…”

Section: Anaerobic Granule Characteristicsmentioning

confidence: 99%

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High rate anaerobic digestion of primary and secondary sludge using the static granular bed reactor (SGBR)

Biese

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Size effect of anaerobic granular sludge on biogas production: A micro scale study

Cited by 56 publications

References 26 publications

Assessment of potential biogas production from rice straw leachate in upflow anaerobic sludge blanket reactor

Assessment of potential biogas production from rice straw leachate in upflow anaerobic sludge blanket reactor

Characterization and BMP Tests of Liquid Substrates for High-rate Anaerobic Digestion

High rate anaerobic digestion of primary and secondary sludge using the static granular bed reactor (SGBR)

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