Biohythane production in two-stage anaerobic digestion system

Hans, Meenu; Kumar, Sachin

doi:10.1016/j.ijhydene.2018.10.022

Cited by 103 publications

(26 citation statements)

References 139 publications

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“…Acidified POME was an outcome of hydrogen fermentation containing large energy that remained as VFAs. Thus, further digestion of this effluent allowed the maximum recovery of energy from VFAs [51]. Moreover, it can be clearly seen from the study conducted by Alrawi et al [14], who deployed the highest OLR (3.4 g COD/L•d) and also the shortest HRT (20 days).…”

Section: Overall Performancementioning

confidence: 86%

“…Table 2 outlines the comparison of previous studies in the start-up period of anaerobic digestion of methane with POME as the substrate except that this study uses acidified POME. The use of acidified POME as feedstock for methane production has been explored by numerous researchers [20,50,51]. According to Krishnan et al [52], acidified POME contains abundant acetogenic and methanogenic bacteria, which were beneficial for the acceleration of anaerobic digestion.…”

Section: Overall Performancementioning

confidence: 99%

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Investigation of Temperature Effect on Start-Up Operation from Anaerobic Digestion of Acidified Palm Oil Mill Effluent

et al. 2019

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Malaysia is one of the largest palm oil producers worldwide and its most abundant waste, palm oil mill effluent (POME), can be used as a feedstock to produce methane. Anaerobic digestion is ideal for treating POME in methane production due to its tolerance to high-strength chemical oxygen demand (COD). In this work, we compared the culture conditions during the start-up of anaerobic digestion of acidified POME between thermophilic (55 °C) and mesophilic (37 °C) temperatures. The pH of the digester was maintained throughout the experiment at 7.30 ± 0.2 in a working volume of 1000 mL. This study revealed that the thermophilic temperature stabilized faster on the 44th day compared to the 52nd day for the mesophilic temperature. Furthermore, the thermophilic temperature indicated higher biogas production at 0.60 L- CH 4 /L·d compared to the mesophilic temperature at 0.26 L- CH 4 /L·d. Results from this study were consistent with the COD removal of thermophilic temperature which was also higher than the mesophilic temperature.

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Section: Overall Performancementioning

confidence: 86%

Section: Overall Performancementioning

confidence: 99%

Investigation of Temperature Effect on Start-Up Operation from Anaerobic Digestion of Acidified Palm Oil Mill Effluent

et al. 2019

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“…Although there is vast potential of 2G ethanol as the best alternative of 1G ethanol, which could resolve the issues related to imbalance in ethanol demand and production as well as food scarcity, however 2G ethanol production is a very expensive process due to which it is still under development to be commercialized successfully. One of the major steps which contribute the high cost to the process is pretreatment of biomass, which is carried out to make the cellulose and hemicellulose accessible to hydrolytic enzymes, and is proceeded through various physical, thermochemical, biological/enzymatic, or combined methods [8,88,89]. Furthermore, another major step contributing higher cost to the process is hydrolysis of accessed cellulose and hemicellulose, which is accomplished by chemical agents (specifically mineral acids) or enzymes [12,85].…”

Section: Second-generation Feedstocksmentioning

confidence: 99%

Production of first- and second-generation ethanol for use in alcohol-based hand sanitizers and disinfectants in India

Hans

Lugani

Chandel

et al. 2021

Biomass Conv. Bioref.

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Emergence of "severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)" causing "COVID-19" or "coronavirus disease 19" as pandemic has got worldwide attention towards hygiene as the first line of defense for the infection control. It is first line of defense not only from COVID-19 but also from other infectious diseases caused by deadly pathogens such as cholera, hepatitis, tuberculosis, polio, etc. Absence of any particular vaccine or treatment let World Health Organization (WHO) recommend to the public to maintain social distancing along with regularly washing their hands with soap, sanitize their hands (where washing is not possible), and disinfect their belongings and buildings to avoid the infection. Out of various formulations available in the market, WHO has recommended alcohol-based hand sanitizers, which mainly comprise of ethanol, isopropyl alcohols, and hydrogen peroxides in different combinations due to their high potential to kill the broad range of pathogens including bacterial, viral, fungal, helminthes, etc. Therefore, alcohol-based sanitizers are in high demand since centuries to prevent infection from pathogenic diseases. Ethanol is the most common and popular alcohol in terms of vanishing wide range of pathogens, convenient to use and its production. Ethanol is produced worldwide and is used in various sectors, e.g., beauty and cosmetics, food and beverages, and as the most demanding gasoline additive. The present review is focused on the ethanol production in India, its diversified applications emphasizing hand sanitizers with discussions on formulation of sanitizer and disinfectants, and viability of lignocellulosic and food grain-based ethanol. The review article also emphasizes on the technological details of 1G and 2G ethanol production, their associated challenges, and inputs for the improved ethanol yields so as to strengthen the supply chain of ethanol in India, and making "Atmanirbhar Bharat" (Self-reliant India) campaign of Indian government successfully viable.

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“…Several strategies and scenarios have been described, in which existing plant infrastructure is re-engineered to increase the production flexibility within multi-stage concepts. Other publications have reviewed some of these aspects regarding the OFMSW (Chatterjee and Mazumder, 2019) and food waste (FW) (Srisowmeya et al, 2020), as well as for process configurations (Van et al, 2020) and mixed gas production (Hans and Kumar, 2019). Rajendran and co-authors focused on techno-economic assessments and related investments and operational costs under the consideration of mono-digester plants (Rajendran et al, 2020).…”

Section: Potentials Of Phase Separationmentioning

confidence: 99%

Phase Separation in Anaerobic Digestion: A Potential for Easier Process Combination?

et al. 2021

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The flexibilization of bioenergy production has the potential to counteract partly other fluctuating renewable energy sources (such as wind and solar power). As a weather-independent energy source, anaerobic digestion (AD) can offer on-demand energy supply through biogas production. Separation of the stages in anaerobic digestion represents a promising strategy for the flexibilization of the fermentative part of biogas production. Segregation in two reactor systems facilitates monitoring and control of the provision of educts to the second methanogenic stage, thus controlling biogas production. Two-stage operation has proven to reach similar or even higher methane yields and biogas purities than single-stage operation in many different fields of application. It furthermore allows methanation of green hydrogen and an easier combination of material and energy use of many biogenic raw and residual biomass sources. A lot of research has been conducted in recent years regarding the process phase separation in multi-stage AD operation, which includes more than two stages. Reliable monitoring tools, coupled with effluent recirculation, bioaugmentation and simulation have the potential to overcome the current drawbacks of a sophisticated and unstable operation. This review aims to summarize recent developments, new perspectives for coupling processes for energy and material use and a system integration of AD for power-to-gas applications. Thereby, cell physiological and engineering aspects as well as the basic economic feasibility are discussed. As conclusion, monitoring and control concepts as well as suitable separation technologies and finally the data basis for techno-economic and ecologic assessments have to be improved.

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Biohythane production in two-stage anaerobic digestion system

Cited by 103 publications

References 139 publications

Investigation of Temperature Effect on Start-Up Operation from Anaerobic Digestion of Acidified Palm Oil Mill Effluent

Investigation of Temperature Effect on Start-Up Operation from Anaerobic Digestion of Acidified Palm Oil Mill Effluent

Production of first- and second-generation ethanol for use in alcohol-based hand sanitizers and disinfectants in India

Phase Separation in Anaerobic Digestion: A Potential for Easier Process Combination?

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