Bioenergy in the era of circular economy: Anaerobic digestion technological solutions to produce biogas from lipid-rich wastes

Diamantis, Vasileios; Eftaxias, Alexandros; Stamatelatou, K.; Noutsopoulos, Constantinos; Vlachokostas, Christos; Aivasidis, A.

doi:10.1016/j.renene.2020.12.034

Cited by 81 publications

(29 citation statements)

References 63 publications

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“…Portanto, o biogás é um importante produto para geração de bioenergia e uma das principais vantagens do tratamento anaeróbio de efluentes. Trata-se de uma fonte de energia limpa e renovável que contribui para a diminuição de gases do efeito estufa mediante a não utilização de combustíveis fósseis e evita o vazamento descontrolado do metano (Abad, Avila, Vicent, & Font, 2019;Diamantis et al, 2021).…”

Section: Fonte: Autores (2021)unclassified

Uso de microrganismos no tratamento anaeróbio de efluentes ricos em nitrogênio e fósforo tendo em vista a economia circular

Santos

Barbosa

Porto

et al. 2021

RSD

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O aumento da população, a crescente urbanização e a industrialização influenciam diretamente na geração de efluentes domésticos e industriais contendo altas cargas de nutrientes como nitrogênio e fósforo, comprometendo o ambiente e a saúde pública. O presente trabalho tem por objetivo revisar as características, os impactos e as vantagens da utilização de microrganismos no tratamento anaeróbio de efluentes ricos em nitrogênio e fósforo, ressaltando o potencial uso de insumos do processo para a economia circular. Para isto, foi realizada uma revisão de literatura utilizando palavras-chave sobre os mecanismos e pressupostos ligados ao tema. Com base nas referências encontradas, foi possível compreender as principais características dos efluentes ricos em nitrogênio e fósforo com ênfase nas etapas do tratamento anaeróbio, as vantagens e desvantagens do tratamento, os microrganismos que podem ser utilizados no processo, os diferentes tipos de reatores anaeróbios, assim como foi possível demonstrar como os subprodutos do tratamento de efluentes em condições anaeróbias podem ser inseridos no contexto da economia circular. Portanto, a digestão anaeróbia é uma alternativa de baixo custo para o tratamento biológico de efluentes ricos em nitrogênio e fósforo, mostrando-se útil para a minimização de impactos negativos associados à contaminação ambiental e à exposição aos riscos de saúde pública, bem como à oportunidade de uso ou reuso de potenciais produtos provenientes do processo a exemplo dos nutrientes e biogás.

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Section: Fonte: Autores (2021)unclassified

Uso de microrganismos no tratamento anaeróbio de efluentes ricos em nitrogênio e fósforo tendo em vista a economia circular

Santos

Barbosa

Porto

et al. 2021

RSD

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“…Lipids can be a benefit and a nuisance in MWW treatment. On the one hand, they have a high energy content for microbial growth and anaerobic conversion to methane (Alves et al 2009;Diamantis et al 2021), and they can serve as feedstock for biodiesel production. On the other hand, lipid metabolism and intracellular storage has been associated with sludge flotation in aerobic MWW treatment (Fan et al 2020), and long-chain fatty acid inhibition in anaerobic systems (Sousa et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Lipid hydrolysis monitoring in wastewater treatment: proof-of-concept for a high throughput vegetable oil emulsion based assay

Gaelen

Springael

Smets

2021

Water Practice and Technology

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Lipids are one of the main organic components in industrial and municipal wastewaters. Lipid hydrolysis is the first step in the biological conversion process and requires a close contact between lipid emulsion droplets and microbial hydrolytic enzymes. Adequate lipid hydrolysis monitoring is crucial to obtain mechanistic knowledge on lipid hydrolysis in response to changes in the process conditions and to improve the overall lipid conversion efficiency in aerobic and anaerobic wastewater treatment systems. We set out to develop a high-throughput lipid hydrolysis monitoring method based on vegetable oil model substrates and fluorescent quantification of product formation by exploiting the interaction with Rhodamine B. Olive oil and soybean oil emulsions were prepared with a high interfacial area and acceptable emulsion stability. The method was easy to apply and allowed to obtain detailed kinetic data over a time course of several hours for up to 16 samples in parallel. A proof-of-concept was obtained with a commercial enzyme, Amano lipase, but remains to be provided for wastewater treatment sludge samples. The findings of this study pave the way for further method development in lipid hydrolysis monitoring.

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“…For instance, one of the main factors that limit the biogas production is the presence of toxic compounds in the inlet substrate [18]. In case of a high presence of lipids, the AD process is remarkably unstable, due to their viscosity at the operating temperature and their toxicity [19]. Saponification and emulsification are the most common solutions to avoid issues related to fat oil and grease (FOG) [20].…”

Section: Introductionmentioning

confidence: 99%

A Review of the State of the Art of Biomethane Production: Recent Advancements and Integration of Renewable Energies

et al. 2021

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Anaerobic Digestion (AD) is a well-established process that is becoming increasingly popular, especially as a technology for organic waste treatment; the process produces biogas, which can be upgraded to biomethane, which can be used in the transport sector or injected into the natural gas grid. Considering the sensitivity of Anaerobic Digestion to several process parameters, mathematical modeling and numerical simulations can be useful to improve both design and control of the process. Therefore, several different modeling approaches were presented in the literature, aiming at providing suitable tools for the design and simulation of these systems. The purpose of this study is to analyze the recent advancements in the biomethane production from different points of view. Special attention is paid to the integration of this technology with additional renewable energy sources, such as solar, geothermal and wind, aimed at achieving a fully renewable biomethane production. In this case, auxiliary heat may be provided by solar thermal or geothermal energy, while wind or photovoltaic plants can provide auxiliary electricity. Recent advancements in plants design, biomethane production and mathematical modeling are shown in the paper, and the main challenges that these fields must face with are discussed. Considering the increasing interest of industries, public policy makers and researchers in this field, the efficiency and profitability such hybrid renewable solutions for biomethane production are expected to significantly improve in the next future, provided that suitable subsidies and funding policies are implemented to support their development.

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Bioenergy in the era of circular economy: Anaerobic digestion technological solutions to produce biogas from lipid-rich wastes

Cited by 81 publications

References 63 publications

Uso de microrganismos no tratamento anaeróbio de efluentes ricos em nitrogênio e fósforo tendo em vista a economia circular

Uso de microrganismos no tratamento anaeróbio de efluentes ricos em nitrogênio e fósforo tendo em vista a economia circular

Lipid hydrolysis monitoring in wastewater treatment: proof-of-concept for a high throughput vegetable oil emulsion based assay

A Review of the State of the Art of Biomethane Production: Recent Advancements and Integration of Renewable Energies

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