Bio-hydrogen production by co-digestion of domestic wastewater and biodiesel industry effluent

Prakash, Jyotsana; Sharma, Rakesh; Patel, Sanjay K.S.; Kim, In-Won; Kalia, Vipin Chandra

doi:10.1371/journal.pone.0199059

Cited by 54 publications

(21 citation statements)

References 28 publications

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“…So, propanoic acid synthesis from glucose (C 6 H 12 O 6 + 2H 2 → 2CH 3 CH 2 COOH + 2H 2 O) could be the predominant reaction accounting for the increasing COD in the reaction mixture. Accordingly, hydrogen, mainly insoluble in an aqueous medium, is quickly consumed by the hydrogen trophic, an essential electron carrier in several reduction reactions ( Fang and Zhang, 2015 ; Prakash et al, 2018 ; Stams et al, 2003 ; Whitman et al, 2014 ). Therefore, the biodigested from anaerobic fermentation could be assumed as a valuable fertilizer due to its increased nitrogen availability for a better short-term soil fertilization action.…”

Section: Resultsmentioning

confidence: 99%

A spatially explicit assessment of sugarcane vinasse as a sustainable by-product

Buller

Romero

Lamparelli

et al. 2021

Science of The Total Environment

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This study evaluates the benefits of mineral fertilizers replacement for biodigested vinasse. Data from experimental anaerobic digestion (AD) of vinasse were applied to support the analysis. Based on previous experiments, this assessment assumed that vinasse production could reach 2.38 × 10 7 m 3 /year generating around 66,585 MWh/year of electric energy from biogas burning in the Administrative Region of Campinas (ARC). This amount of energy could supply more than 103,000 inhabitants and avoid 35,892 tCO 2eq /year (from electric energy replacement). The biodigested vinasse might also reduce the total N, P, and K mineral fertilizers demand per hectare of sugarcane crop in 30%, 1%, and 46%, respectively, avoiding additional greenhouse gas emissions of 111,877 tCO 2 eq/year. There is no biodigested vinasse surplus for a moderate fertigation rate of 100 m 3 /ha, complying with local environmental laws related to nutrients excess side effects in areas destined to sugarcane crop. Notwithstanding, a Geographic Information System analysis for a small adjacent area to ARC indicated nine different fertigation rates, ranging from 50 to 100 m 3 /ha. Even though the general analysis for ARC shows high NPK replacement levels, the fertigation practices should be subsidized for robust soil analysis and adequate to safe environmental levels. A management tool can be designed using the results here presented to subsidize investments for AD widespread adoption by the sugarcane industry to catch a reasonable practice from the economic and environmental perspectives.

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Section: Resultsmentioning

confidence: 99%

A spatially explicit assessment of sugarcane vinasse as a sustainable by-product

Buller

Romero

Lamparelli

et al. 2021

Science of The Total Environment

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“…Similarly, bioeconomy can contribute to overcoming a prominent challenge for growing populations, namely wastewater in urban areas. By means of certain bacterial strains, bio-hydrogen can be produced by co-digestion of domestic wastewater and biodiesel industry effluent [49]. According to experts, further development in other renewable energies resources (solar, wind, and hydropower energies) are also essential for securing sustainable energy resources for future generations.…”

Section: Discussionmentioning

confidence: 99%

Bioeconomy from experts’ perspectives – Results of a global expert survey

Issa

Delbrück²,

Hamm

2019

PLoS ONE

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Effective global collaboration is crucial to achieving the UN Sustainable Development Goals (SDGs). It requires an understanding of the needs of individual countries and their expectations related to bioeconomy. With the aim to explore the prospective developments in the global bioeconomy over the next 20 years, the German Bioeconomy Council, an independent advisory body to the German Federal Government, commissioned BIOCOM-AG to invite experts from around the globe to share their insights in a global expert survey. The survey was conducted online in autumn 2017. 345 experts from 46 countries completed the questionnaire about future developments and strategies in the global bioeconomy. As claimed by the experts, the upcoming bioeconomy must primarily meet humanity’s needs in the energy, agriculture, and food sectors. Moreover, innovative products based on renewable resources are anticipated to be of great importance. Even though all UN SDGs will be affected by future bioeconomy success stories, five SDGs stood out within the sample: SDG 12: ‘responsible consumption and production’; SDG 9: ‘industry, innovation and infrastructure’; SDG 13: ‘climate action’; SDG 7: ‘affordable and clean energy’; and SDG 11: ‘sustainable cities and communities’. About three quarters of the experts emphasized the need to specifically address three conflicting goals in any future bioeconomy strategy: non-food uses of arable land, use of crop land to produce feedstock for meat, milk and egg production and, finally, the conversion of virgin forests into agricultural land. Most experts stated that reducing food loss and waste is crucial to eradicating the world hunger problem. The proposed solutions relied greatly on innovation and technological development. Bioeconomy expertise and know-how should be shared in close cooperation between developed and developing economies to reach UN SDGs. A supportive political framework would be the ultimate goal towards furthering the progress of a future bioeconomy all over the world.

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“…The glycerol is produced as a by-product and is denser than biodiesel, which is continuously removed to increase biodiesel yield or used as feed to produce biohydrogen (Bindra et al, 2017;Prakash et al, 2018). Solvents are separated from methyl ester by evaporation.…”

Section: Biodieselmentioning

confidence: 99%

Valorization of Wastewater Resources Into Biofuel and Value-Added Products Using Microalgal System

et al. 2021

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Wastewater is not a liability, instead considered as a resource for microbial fermentation and value-added products. Most of the wastewater contains various nutrients like nitrates and phosphates apart from the organic constituents that favor microbial growth. Microalgae are unicellular aquatic organisms and are widely used for wastewater treatment. Various cultivation methods such as open, closed, and integrated have been reported for microalgal cultivation to treat wastewater and resource recovery simultaneously. Microalgal growth is affected by various factors such as sunlight, temperature, pH, and nutrients that affect the growth rate of microalgae. Microalgae can consume urea, phosphates, and metals such as magnesium, zinc, lead, cadmium, arsenic, etc. for their growth and reduces the biochemical oxygen demand (BOD). The microalgal biomass produced during the wastewater treatment can be further used to produce carbon-neutral products such as biofuel, feed, bio-fertilizer, bioplastic, and exopolysaccharides. Integration of wastewater treatment with microalgal bio-refinery not only solves the wastewater treatment problem but also generates revenue and supports a sustainable and circular bio-economy. The present review will highlight the current and advanced methods used to integrate microalgae for the complete reclamation of nutrients from industrial wastewater sources and their utilization for value-added compound production. Furthermore, pertaining challenges are briefly discussed along with the techno-economic analysis of current pilot-scale projects worldwide.

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Bio-hydrogen production by co-digestion of domestic wastewater and biodiesel industry effluent

Cited by 54 publications

References 28 publications

A spatially explicit assessment of sugarcane vinasse as a sustainable by-product

A spatially explicit assessment of sugarcane vinasse as a sustainable by-product

Bioeconomy from experts’ perspectives – Results of a global expert survey

Valorization of Wastewater Resources Into Biofuel and Value-Added Products Using Microalgal System

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