Solar greenhouse assisted biogas plant in hilly region – A field study

Kumar, K. Vinoth; Bai, R. Kasturi

doi:10.1016/j.solener.2008.03.005

Cited by 42 publications

(6 citation statements)

References 17 publications

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“…The energy conversion rate of the feedstock in P3 was increased by a factor of ∼2.29, which is attributed to being heated by the solar thermal collector, and the rate in P2 was increased by a factor of 5.65, because of the further increases in fermentation temperature and the small fluctuation range with the addition of a PCTS device and a PV-assisted device (replaced by electricity in this study). However, previous studies using solar energy to enhance fermentation temperature reported a lower energy conversion rate, especially in the winter. , This might be due to that the utilization of solar energy was improved by the solar thermal and PCTS systems in this study.…”

Section: Resultsmentioning

confidence: 65%

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Two-Phase Anaerobic Digester Combined with Solar Thermal and Phase Change Thermal Storage System in Winter

et al. 2017

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Using solar energy as the heat source for biogas improvement of the anaerobic digester is an effective method. However, intermittent solar radiation and low ambient temperature in the winter make it difficult to maintain a steady fermentation temperature. In this study, a pilot-scale two-phase anaerobic digester combined with solar thermal and phase change thermal storage (PCTS) system has been constructed. A set of comparative field studies were carried out during the winter in Maanshan City, Anhui Province, China; these periods of study included no heating mode (P1), heated with solar thermal and PCTS system (P2), and conventional solar heating mode (P3). The comparison shows that methane yields and the energy conversion rate of the substrates of P2 were 12.33 m3 and 48.6%, respectively, both of which increased by 5.65 and 1.01 times, compared with that of P1 and P3, respectively. The statistical coefficients of variation for the fermentation temperature were 2.5% in P2 and 6.6% in P3, which means that the PCTS system supplied heat with less temperature fluctuation when solar radiation was weak.

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Section: Resultsmentioning

confidence: 65%

“…However, previous studies using solar energy to enhance fermentation temperature reported a lower energy conversion rate, especially in the winter. 8,29 This might be due to that the utilization of solar energy was improved by the solar thermal and PCTS systems in this study.…”

Section: Energy and Fuelsmentioning

confidence: 88%

Two-Phase Anaerobic Digester Combined with Solar Thermal and Phase Change Thermal Storage System in Winter

et al. 2017

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“…Generally, the decomposition process of organic matter into simple organic compounds takes two to three months to be used as compost. On the other hand, the decomposition works faster within two to four weeks for Bokashi processing and does not leave behind foul odor and heat (Vinoth Kumar & Kasturi Bai, 2008).…”

Section: Different Methods Of Compostingmentioning

confidence: 99%

Food Waste Treatment Methods and its Effects on the Growth Quality of Plants: A Review

Arumugam¹,

Ismail²,

Puspadaran³

et al. 2021

JTAS

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Food waste and leftovers were common materials that were currently used as bio-compost or soil conditioners upon decomposition. Food waste was a source of food that has declined nutritional value and is not deemed favorable for human consumption. Leftovers were defined as uneaten edible remains of a meal. Biodegradation of these components contributes to many macronutrients, including carbon (C), hydrogen (H), nitrogen (N), phosphorus (P), and potassium (K) in the compost, which makes it a suitable growing condition for plants. In this study, the main sources of research data were one hundred thirty-one scientific articles relating to food waste treatment methods and the growth quality of plants over the last few years. This review was the consensus of the role and characteristics of food waste and leftovers as fertilizers. Moreover, the paper briefly discusses the different composting methods for these materials and their corresponding effects on the growth quality of plants.

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“…A study conducted in India to evaluate the performance of a solar greenhouse-assisted plastic digester and compare it with the conventional underground fixed-dome Deenabandhu model of a biogas plant showed that the slurry temperature in the solar-assisted digester was 35% higher than that of the conventional biodigester. The average annual gas yield was nearly 13% higher than that of the conventional digester [77]. Another study investigated the thermal performance of a prefabricated solar-assisted plastic biodigester experimentally and developed a one-dimensional thermal model in MATLAB, which concluded that the digester orientation, thickness of insulation, and greenhouse material have a great impact on increasing the average slurry temperature [78].…”

Section: Low-cost Thermal Enhancement Measuresmentioning

confidence: 99%

Household biogas technology in the cold climate of low-income countries: a review of sustainable technologies for accelerating biogas generation

Lohani,

Shaw,

Shrestha

et al. 2024

Prog. Energy

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Low-income countries have long benefited from household biogas plants for extracting clean energy and fertilizer. Despite the popularity, such ordinary plants do not have heating systems and suffer lower biogas production in cold regions or cold winters. This paper attempts a comprehensive review on research and development of household biogas technology in cold climate. This review specifically highlights the influence of temperature on biogas production, and technologies and recent advances in psychrophilic biogas production. Such measures are introduction of adapted inoculums, maneuvering operational parameters like hydraulic retention time (HRT) and organic loading rate (OLR), co-digestion approach and additives and digester designs. In addition to that, the review portrays adoption of low-cost heating arrangements including construction of greenhouse over bio-digesters, digester insulation, and integration of solar heating is crucial to enhance biogas production. Furthermore, this review identified gaps in the operation of bio-digesters under psychrophilic temperature in low-income countries and recommends operational consistencies in full scale psychrophilic biogas plants through development of standards, operational guidelines, and users' trainings.

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Solar greenhouse assisted biogas plant in hilly region – A field study

Cited by 42 publications

References 17 publications

Two-Phase Anaerobic Digester Combined with Solar Thermal and Phase Change Thermal Storage System in Winter

Two-Phase Anaerobic Digester Combined with Solar Thermal and Phase Change Thermal Storage System in Winter

Food Waste Treatment Methods and its Effects on the Growth Quality of Plants: A Review

Household biogas technology in the cold climate of low-income countries: a review of sustainable technologies for accelerating biogas generation

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