Chemical characterisation of percolate and digestate during the hybrid solid anaerobic digestion batch process

Massaccesi, Luisa; Sordi, Alessio; Micale, Caterina; Cucina, Mirko; Zadra, Claudia; Maria, Francesco Di; Gigliotti, Giovanni

doi:10.1016/j.procbio.2013.06.026

Cited by 59 publications

(29 citation statements)

References 38 publications

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“…The absence of digestate phytoxicity was recorded also by other authors, but the conditions were only partially comparable with the present work. Actually, some studies were performed in vivo (Różyło et al, 2015), other applied different exposition periods (Alvarenga et al, 2015) or other kinds of digestate (Massaccesi et al, 2013). In a most recent study, the use of proper concentrations of digestate as a biofertiliser is encouraged, since it causes biostimulation under 20% dose (Pivato et al, 2015).…”

Section: Fischerimentioning

confidence: 99%

Is digestate safe? A study on its ecotoxicity and environmental risk on a pig manure

Tigini

Franchino

Bona

et al. 2016

Science of The Total Environment

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Abstract. Digestate represents a precious by-product in particular in agriculture, however its impact on the environment and human health is still unexplored. In this work, the toxicity of a pig slurry digestate was assessed through 7 ecotoxicity tests and considering 10 different endpoints. Besides, a synthetic index was applied to the outputs of the battery of tests for the environmental risk assessment, in order to evaluate the opportunity to use directly this kind of digestate in agriculture or to introduce an additional treatment. All the organisms were sensitive to digestate toxicity (EC 50 ranged from 14.22% for Cucumis sativum to 0.77% for Raphidocelis subcapitata). The physical-chemical features at the base of this toxicity seem to be the high content of ammonium, salinity, COD, phosphate and colour. The synthetic index showed that the digestate was very toxic and associated to an extremely high environmental risk. Thus a pre-treatment is needed to reduce its toxicity and environmental impact, whatever could 2 be its exploitation.

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Section: Fischerimentioning

confidence: 99%

Is digestate safe? A study on its ecotoxicity and environmental risk on a pig manure

Tigini

Franchino

Bona

et al. 2016

Science of The Total Environment

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“…This result may be associated with the salt solubilization during the process and the mineralization of organic matter (Massaccesia et al, 2013). The electrical conductivity indicates a certain degree of salinity in the effluent, which limits its use in agricultural irrigation, but not its use as fertilizer in a controlled manner (Silva et al, 2012).…”

Section: Resultsmentioning

confidence: 99%

Anaerobic co-digestion of hatchery waste and wastewater to produce energy and biofertilizer - Batch phase

Matter

Costa

et al. 2017

Rev. bras. eng. agríc. ambient.

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A B S T R A C TAiming to evaluate different wastewaters in the anaerobic co-digestion (ACoD) of hatchery wastes, a batch test was conducted in bench horizontal digesters. At the end of the process, the potential production of biogas and methane was calculated as well as the chemical composition (macro-and micronutrients) of the effluent and the concentrations of methane and carbon dioxide gas at 60 days. The monitoring of the process included observations of the reduction of the organic carbon, chemical oxygen demand, and total (TS) and volatile solids (VS), as well as the variation of pH and electrical conductivity (EC). The results showed that the mixing between the hatchery fresh waste and swine wastewater (T 4 ) and among fresh hatchery waste, water from the first anaerobic pond of the hatchery and swine wastewater (T 5 ) represent significant sources of renewable energy and thereby greater potential for biogas production (192.50 and 205.0 L biogas per kg of VS added to T 4 and T 5 , respectively). The average concentration of methane in the biogas varied from 72 to 77% among the treatments. For all treatments, reductions were observed in TS and VS and increases in pH and EC. It was concluded that the energy recovery from hatchery wastes is favoured by the addition of swine wastewater in the ACoD process.Co-digestão anaeróbia de resíduos de incubatório e águas residuárias para produção de energia e biofertilizante -Fase batelada R E S U M O Visando avaliar diferentes águas residuárias na co-digestão anaeróbia de resíduos de incubatório foi realizado ensaio batelada conduzido em biodigestores horizontais de bancada. Ao final do processo foram determinados a produção e os potenciais de produção de biogás e de metano bem como a composição química (macro e micronutrientes) do efluente e a concentração de metano e gás carbônico aos 60 dias. O monitoramento do processo foi acompanhado pela redução de carbono orgânico, demanda química de oxigênio, sólidos totais e voláteis (ST e SV), além da variação do pH e da condutividade elétrica (CE). Os resultados obtidos revelaram que as misturas entre resíduo fresco de incubatório e água residuária de suinocultura -ARS (T 4 ) e resíduo fresco de incubatório + água da primeira lagoa anaeróbia do incubatório + ARS (T 5 ) apresentaram os melhores potenciais de produção de biogás (192,50 e 205,0 L biogás por kg de SV adicionados, respectivamente). Aos 60 dias a concentração média de metano variou de 72 a 77% entre os tratamentos. Para todas as situações avaliadas observou-se redução de ST e SV e aumento do pH e da CE. Concluiu-se que a recuperação de energia dos resíduos de incubatório é favorecida pela adição de ARS em co-digestão anaeróbia. Key words:biogas methane swine wastewater slaughterhouse wastewater Palavras-chave: biogás metano água residuária da suinocultura água residuária de frigorífico

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“…It is characterized by high potential fertiliser value due to its contents of nitrogen, phosphorous, potassium and micronutrients [133]. The agricultural use of the anaerobic digestate has not been clearly regulated yet [134], so that its aerobic processing has become a current practise [135,136] to produce compost, which is commonly used as fertilizer. However the application on soil of waste-produced compost may turn to be not sustainable, due to the risk associated to the presence of potentially toxic compounds [137].…”

Section: The Use Of Digestate For Bioethanol Productionmentioning

confidence: 99%

Combined Biogas and Bioethanol Production: Opportunities and Challenges for Industrial Application

Cesaro

Belgıorno

2015

Energies

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Abstract:In the last decades the increasing energy requirements along with the need to face the consequences of climate change have driven the search for renewable energy sources, in order to replace as much as possible the use of fossil fuels. In this context biomass has generated great interest as it can be converted into energy via several routes, including fermentation and anaerobic digestion. The former is the most common option to produce ethanol, which has been recognized as one of the leading candidates to substitute a large fraction of the liquid fuels produced from oil. As the economic competitiveness of bioethanol fermentation processes has to be enhanced in order to promote its wider implementation, the most recent trends are directed towards the use of fermentation by-products within anaerobic digestion. The integration of both fermentation and anaerobic digestion, in a biorefinery concept, would allow the production of ethanol along with that of biogas, which can be used to produce heat and electricity, thus improving the overall energy balance. This work aims at reviewing the main studies on the combination of both bioethanol and biogas production processes, in order to highlight the strength and weakness of the integrated treatment for industrial application.

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Chemical characterisation of percolate and digestate during the hybrid solid anaerobic digestion batch process

Cited by 59 publications

References 38 publications

Is digestate safe? A study on its ecotoxicity and environmental risk on a pig manure

Is digestate safe? A study on its ecotoxicity and environmental risk on a pig manure

Anaerobic co-digestion of hatchery waste and wastewater to produce energy and biofertilizer - Batch phase

Combined Biogas and Bioethanol Production: Opportunities and Challenges for Industrial Application

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