Enhanced methane production from rice straw co-digested with anaerobic sludge from pulp and paper mill treatment process

Mussoline, Wendy; Esposito, Giovanni; Lens, Piet N.L.; Spagni, Alessandro; Giordano, Andrea

doi:10.1016/j.biortech.2013.08.107

Cited by 53 publications

(49 citation statements)

References 31 publications

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“…Two definitive VFA peaks were observed on Day 8 and Day 14, representing the hydrolysis of the piggery wastewater followed by the hydrolysis of the rice straw. Similar VFA trends were observed in the lab-scale digesters (specifically in D3 and D4), where the initial VFA concentration began to decrease rapidly followed by a second peak in production [21]. In the lab-scale digesters, the second peak was associated with the hydrolysis of the straw material, which occurred faster in the digesters containing a higher ratio of paper mill sludge [21].…”

Section: Discussionsupporting

confidence: 68%

“…The lab-scale digester (D4) had a specific methane yield of 302 L/kgVS in a 92-day digestion cycle [21], which is significantly higher than the results obtained in the pilot-scale digester. The primary reason for this difference is the lack of mixing capacity in the pilot-scale reactor.…”

Section: Discussionmentioning

confidence: 70%

“…Manual mixing to redistribute the sludge material resulted in an immediate increase in gas production in the following days. If the digester contents would have been adequately homogenized at the beginning of the experiment, complete digestion would likely have occurred within a 92-day digestion cycle as observed in the lab-scale digesters [21].…”

Section: Discussionmentioning

confidence: 99%

“…The digester was operated as a batch reactor and initially filled with 50 kg of dry straw, 75 kg of piggery wastewater, and 25 kg of anaerobic sludge from the pulp and paper mill treatment process. This substrate to inocula ratio was determined to be the optimum ratio based on methane yields obtained in laboratory-scale digesters [21] and feasible application for a farm-scale system. The digester was operated in dry (20% TS), mesophilic conditions for a total of 153 days.…”

Section: Experimental Set-upmentioning

confidence: 99%

“…This effluent is generated from five different pulping facilities that employ different operational practices. An initial laboratory study demonstrated that co-digestion of rice straw with both piggery wastewater and UASB paper mill sludge could accelerate formation of volatile fatty acids (VFA) and produce higher methane yields (302 to 340 L N CH 4 /kgVS) than those generated with the piggery wastewater alone [21]. In the present work, a pilot-scale digester (1 m 3 ) was operated with the same straw-inocula mixture and digestion conditions tested in previous lab-scale experiments to determine if this co-digestion approach could improve methane production and reduce digestion cycles for farmscale systems.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced Methane Production from Pilot-Scale Anaerobic Digester Loaded with Rice Straw

Mussoline¹,

Esposito²,

Lens³

et al. 2013

TOENVIEJ

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A novel co-digestion approach was evaluated to determine if agricultural and industrial waste residues could efficiently degrade straw without pretreatment. Untreated rice straw was co-digested with pig wastewater and anaerobic sludge from the pulp and paper mill treatment process in a pilot-scale digester (1 m 3 ) operated in dry, mesophilic conditions. The total weight ratio of dry straw to pig wastewater to sludge was 1 to1.25 to 0.5. The experiment was performed for a total of 153 days, however, the optimum period to balance the maximum energy output with the minimum retention time was determined to be 93 days. The addition of paper mill sludge accelerated VFA formation and gas production when compared to another pilot-scale digester operated under the same conditions without the sludge material. The straw in the pilot-scale digester with the sludge yielded 231 LCH 4 /kg VS within a 93-day digestion cycle compared to 189 days without the sludge. Daily leachate recirculation (0.2m 3 /m 3 straw-day), however, was not adequate for internal mixing and homogenization of the digester material. With adequate mixing, this co-digestion approach could enhance methane production and reduce the digestion time for untreated rice straw in a farm-scale digester.

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Section: Discussionsupporting

confidence: 68%

Section: Discussionmentioning

confidence: 70%

Section: Discussionmentioning

confidence: 99%

Section: Experimental Set-upmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Enhanced Methane Production from Pilot-Scale Anaerobic Digester Loaded with Rice Straw

Mussoline¹,

Esposito²,

Lens³

et al. 2013

TOENVIEJ

Self Cite

View full text Add to dashboard Cite

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Value Added Products from Agriculture, Paper and Food Waste: A Source of Bioenergy Production

Chandra

Srinivasulu

Yadav

et al. 2021

Clean Energy Production Technologies

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Thermophilic dry methane fermentation of municipal solid waste with various compositions

Kojima

Nakakubo

Iwabuchi

2021

J Mater Cycles Waste Manag

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This paper describes the clarification of the critical organic load and the inhibition factors of thermophilic dry methane cofermentation of municipal solid wastes with various compositions. Various compositions of paper waste per food waste ratio, such as 0.67-0.66, 0.4-0.43, 0.25-0.2, and 0.11, were examined using digesters with an effective volume of 2 L maintained at a thermophilic temperature of 55 °C. It was found that the biogas yield under stable operating conditions was 0.4-0.5 NL/ g VS . The critical organic load of organic matter without fermentation inhibition was 7.5-8.5 gVS/(kg sludge d), and a smaller critical organic load was obtained with a higher food waste input ratio. Because volatile fatty acids (VFAs) accumulated under all conditions when fermentation inhibition occurred, it was considered that fermentation stopped because of the influence of VFAs. Moreover, the propionic acid concentration increased from the time when there was no significant fermentation inhibition, which might be used as a monitoring index for fermentation status.

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Enhanced methane production from rice straw co-digested with anaerobic sludge from pulp and paper mill treatment process

Cited by 53 publications

References 31 publications

Enhanced Methane Production from Pilot-Scale Anaerobic Digester Loaded with Rice Straw

Enhanced Methane Production from Pilot-Scale Anaerobic Digester Loaded with Rice Straw

Value Added Products from Agriculture, Paper and Food Waste: A Source of Bioenergy Production

Thermophilic dry methane fermentation of municipal solid waste with various compositions

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