Methane enrichment of biogas produced from floral waste: A potential energy source for rural India

Kulkarni, M. B.; Ghanegaonkar, P. M.

doi:10.1080/15567036.2019.1571126

Cited by 22 publications

(7 citation statements)

References 16 publications

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“…Biogas upgrading technologies based on CO 2 sorption (adsorption and absorption) are divided into two categories, physical and chemical scrubbing [9]. Chemical techniques for CO 2 capture use aqueous alkaline solutions (e.g., sodium hydroxide (NaOH), calcium hydroxide (Ca(OH) 2 ), potassium hydroxide (KOH), or CaO) to upgrade biogas [19,42,43]. The exothermic reactions occur when CaO is added to water, and then the raw biogas is passed through the packed columns containing the reagents solution.…”

Section: Resultsmentioning

confidence: 99%

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Possibilities of Biogas Upgrading on a Bio-Waste Sorbent Derived from Anaerobic Sewage Sludge

et al. 2022

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The development of biogas upgrading technologies is now an essential issue in recovering fuel-grade methane. Nowadays, trends in biogas upgrading include investigations of low-cost and renewable materials as sorbents for biogas enrichment to produce biomethane. Therefore, in this work, wastewater anaerobic sludge stabilized with calcium oxide was used as the bio-waste sorbent to capture carbon dioxide from biogas, employing a fixed bed column. The biogas flow rate was the parameter considered for examining the breakthrough responses. It was observed that breakthrough time decreases with increasing biogas inflow rate from 570 ± 10 min at 5 mL/min to 120 ± 12 min at 35 mL/min. The maximum sorption capacity of 127.22 ± 1.5 mg CO2/g TS of sorbent was estimated at 15 mL/min. Biomethane concentration in biogas increased from 56.5 ± 1.7 v% in the raw biogas to 98.9 ± 0.2 v% with simultaneous low carbon dioxide content of 0.44 ± 0.2 v%. A strong positive correlation (R2 = 0.9919) between the sorption capacity and the biogas flow rate was found in the range of biogas inflow rates between 5 mL/min and 15 mL/min. Moreover, the correlation analysis showed a strong negative relationship (R2 = 0.9868) between breakthrough time and the mass of carbon dioxide removal, and the biogas flow rates ranged from 10 mL/min to 20 mL/min.

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Section: Resultsmentioning

confidence: 99%

“…The exothermic reactions occur when CaO is added to water, and then the raw biogas is passed through the packed columns containing the reagents solution. CO 2 reacts with chemicals in the solvent and is also absorbed into the liquid [42]. The reactions are as follows [19,29]:…”

Section: Resultsmentioning

confidence: 99%

Possibilities of Biogas Upgrading on a Bio-Waste Sorbent Derived from Anaerobic Sewage Sludge

et al. 2022

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“…The biogas produced from flower waste can be used as a source of heat for cooking purposes or can be used in electricity production (Kulkarni and Ghanegaonkar, 2019). A recent report by Ranjitha et al (2014) showed that flower waste has enormous potential to produce biogas.…”

Section: Biogasmentioning

confidence: 99%

Management and sustainable energy production using flower waste generated from temples

Kumar¹,

Kumari²,

Kumar³

2020

Environmental Degradation: Causes and Remediation Strategies

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Temples are considered as the house of deities. As being a part of their culture, people of Hindu religion pay visits to the temple before starting any auspicious occasion to get blessings of their Gods. Out of them, those who are immense believers of God are the daily visitors of temples. As a part of worship, flowers are essentially used. As a result, a huge amount of flower waste is generated from temples worldwide. The majorly offered flowers in temples include rose, marigold, jasmine, Hibiscus, etc. The flower waste generated from such activities causes harmful effects to many life forms, therefore, its management has become an emerging issue. As flower waste contains enough nutrient and lignocellulosic material, it can be used for a variety of purposes like bioenergy and biofuel production, compost preparation, conditioner for lawn dressing, eco-friendly incense sticks, soaps, rose water and other food products, etc. To achieve sustainable energy demands, low-cost bioenergy can be generated from floral waste. Energy from flower waste either might be in the form of biogas, biohydrogen, bioethanol, biocharcoal, or direct burning to get heat energy. This book chapter deals with a possible consequence that may arise as a result of improper flower waste disposal along with its possible utilization for low-cost bioenergy production and how waste flowers can be used as potential bioenergy material.

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“…Biogas is a colourless, combustible, and low-priced RET generated through various biochemical technologies such as anaerobic digestion (AD) of natural waste materials [12,13]. Hence, the process is widely considered a practical solution that could satisfy the energy needs of rural populations [14,15].…”

Section: Introductionmentioning

confidence: 99%

Potential Routes and Innovative Technologies for Valorisation of Cassava Peels

Nyakuma¹

2021

Preprint

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The large-scale processing of Cassava (Manihot esculenta Crantz.) generates significant quantities of solid wastes annually. Cassava peels (CP) account for 5 wt.% - 30 wt.% of wastes from the processing of cassava tubers. The poor disposal and management of CP pose risks to human health, safety and the environment. Therefore, there is an urgent need to identify and examine low cost, socially acceptable and environmentally friendly strategies to mitigate the immediate and long terms disposal and management challenges. Lack of such measures results in the accumulation of CP wastes, which are currently buried, combusted, or dumped in open fields. Therefore, this paper reviewed the potential routes for the biochemical, thermochemical, and plasma valorisation of CP. The literature reviewed revealed that biochemical technologies such as anaerobic digestion (AD) and fermentation are the most widely utilised approaches currently adopted for CP valorisation. AD produces biogas (methane 50-72 vol. % and carbon dioxide 25-45 vol. %), whereas fermentation yields bioethanol. However, the numerous challenges such as substrate-induced inhibition, associated with the biochemical processes hamper microbial degradation, methane formation, and process efficiency. Furthermore, the processes generate secondary wastes or digestate/sludge, which requires additional processing before disposal. Therefore, innovative thermal, thermochemical, and plasma technologies were proposed to valorise CP into syngas, biofuels, bioenergy, biochemicals, and fertilizers, among others. However, the waste products of fermentation cannot be effectively utilised as bio-fertilizers, whereas bioethanol causes corrosion in engines. Overall, the biochemical, thermal, thermochemical and plasma technologies can effectively valorise CP for effective net energy generation.

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Methane enrichment of biogas produced from floral waste: A potential energy source for rural India

Cited by 22 publications

References 16 publications

Possibilities of Biogas Upgrading on a Bio-Waste Sorbent Derived from Anaerobic Sewage Sludge

Possibilities of Biogas Upgrading on a Bio-Waste Sorbent Derived from Anaerobic Sewage Sludge

Management and sustainable energy production using flower waste generated from temples

Potential Routes and Innovative Technologies for Valorisation of Cassava Peels

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