Comparison of lab-scale and pilot-scale hybrid anaerobic solid–liquid systems operated in batch and semi-continuous modes

Wang, J.Y.; Zhang, H.; Stabnikova, Оlena; Tay, Joo‐Hwa

doi:10.1016/j.procbio.2005.03.047

Cited by 43 publications

(14 citation statements)

References 21 publications

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“…5 showed, SCOD concentration of each bioreactor firstly increased and then decreased. The result was similar to other authors [48,49]. Compared with four bioreactors, the SCOD concentration increased in the bioreactor with the increasing sodium hydroxide dosage during the first period of AD (days 0-10); on days 11-32, the SCOD concentration decreased in the bioreactor with higher sodium hydroxide concentration used to pretreat PPS.…”

Section: Bioreactorsupporting

confidence: 90%

Alkali pretreatment enhances biogas production in the anaerobic digestion of pulp and paper sludge

Lin

Wang

ShaoQuan

et al. 2009

Journal of Hazardous Materials

269

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Section: Bioreactorsupporting

confidence: 90%

Alkali pretreatment enhances biogas production in the anaerobic digestion of pulp and paper sludge

Lin

Wang

ShaoQuan

et al. 2009

Journal of Hazardous Materials

269

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“…Before anaerobic digestion, the SCOD concentration in the alkaline-thermal pretreatment was the highest of the four pretreatments, presumably because of the greater pretreatment severity, and was 2.95-fold higher than in the control (lowest). Immediately after the start of anaerobic digestion, a further increase in SCOD was observed, and then the SCOD concentration decreased after 6 days in all four treatments, contradicting findings in other research (Wang et al 2005b;Fang et al 2014). The reason was probably the high ability for COD disintegration in solids during the predigestion phase and conversion into SCOD under hydrolysis and acidification by microorganisms.…”

Section: Effects Of Pretreatment On Substrate Changes In Scod During contrasting

confidence: 74%

Influence of Alkaline-Thermal Pretreatment on High-Solids Anaerobic Digestion of Dewatered Activated Sludge

Guo¹,

Du²,

Ji³

et al. 2016

BioResources

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The influence of alkaline (23.77 mg NaOH/g total solid), thermal (134.95 °C), and combined alkaline-thermal pretreatment on parameters of dewatered activated sludge (DAS) during high-solids anaerobic digestion was investigated. Soluble chemical oxygen demand (SCOD), soluble proteins, and VFAs (volatile fatty acids) concentrations were significantly higher (by two-fold) in pretreated DAS samples than in the control. During subsequent anaerobic digestion, the concentrations first increased and then decreased. Total chemical oxygen demand (TCOD) decreased by 28.40% to 40.92%, and ammonia nitrogen accumulated during anaerobic digestion. For the alkaline, thermal, and alkalinethermal pretreatments, daily methane yield significantly increased in midanaerobic digestion and cumulative methane yield (CMY) increased by 9.92, 35.25, and 52.95%, respectively, relative to the control. There were clear synergistic effects of alkaline-thermal pretreatment, resulting in a 17.20% increase in CMY compared with the sum of the separate alkaline and thermal pretreatments. Therefore, alkaline-thermal pretreatment was helpful for high-solids anaerobic digestion of DAS and was an effective pretreatment method. Gompertz model fitting to the CMY curve produced determination coefficients (R 2 ) greater than 0.9931 for all pretreatments, which was better than for a first-order kinetic model fitting curve.

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“…The main difficulty during the demonstration is low feedstock. The system only received one-third of the total 3-ton capacity [56,57]. Again, the HASL case study let us focus on the possibility to the increment of the quantity and quality of the collected FW.…”

Section: Small-scale Anaerobic Digestionmentioning

confidence: 99%

Municipal food waste management in Singapore: practices, challenges and recommendations

Mao

Chen

et al. 2015

J Mater Cycles Waste Manag

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Municipal food waste is a global challenge in solid waste management, especially in Singapore. It is scattered in location, non-ignorable in quantity, and nonuniform in quality. This report focuses on the state of the art and challenges of Singapore municipal food waste management for the first time. The previous studies only focus on general food waste from both industry and municipality. The physical properties of municipal food waste are incompatible to landfill and incineration by creating secondary environmental burdens and lowering treatment efficiency. A decentralized anaerobic co-digestion with other substrates, after comparing with other technologies, is recommended, since bio-energy is a recognized valuable final product in Singapore's context. However, there are four major highlighted challenges of food waste recycling, including low final product demand, inefficient waste collection design, cheap disposal cost, and low social awareness. A ''food waste management hierarchy'' for Singapore is also proposed. The most to least preferred options are listed as: source reduction, industrial uses, renewable energy, and composting then incineration.

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Comparison of lab-scale and pilot-scale hybrid anaerobic solid–liquid systems operated in batch and semi-continuous modes

Cited by 43 publications

References 21 publications

Alkali pretreatment enhances biogas production in the anaerobic digestion of pulp and paper sludge

Alkali pretreatment enhances biogas production in the anaerobic digestion of pulp and paper sludge

Influence of Alkaline-Thermal Pretreatment on High-Solids Anaerobic Digestion of Dewatered Activated Sludge

Municipal food waste management in Singapore: practices, challenges and recommendations

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