Volatile fatty acid production from hydrolyzed sewage sludge: effect of hydraulic retention time and insight into thermophilic microbial community

Gottardo, Marco; Crognale, Simona; Tonanzi, Barbara; Rossetti, Simona; D’Annibale, Ludovica; Dosta, J.; Valentino, Francesco

doi:10.1007/s13399-022-03659-8

Cited by 6 publications

(3 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Inadequate wastewater management is associated with many environmental issues, as it contributes to the pollution of the different ecosystems [ 43 , 44 , 45 ]. At a wastewater treatment facility, the disposal of sewage sludge accounts for ≈50–60% of the total operating costs [ 46 ]. Therefore, finding appropriate technologies for its processing not only attenuates its environmental footprint but also allows the conversion of organic content into valuable products [ 46 ].…”

Section: Need For a Better Valorization Of Global Waste Streamsmentioning

confidence: 99%

“…At a wastewater treatment facility, the disposal of sewage sludge accounts for ≈50–60% of the total operating costs [ 46 ]. Therefore, finding appropriate technologies for its processing not only attenuates its environmental footprint but also allows the conversion of organic content into valuable products [ 46 ]. Sewage sludge could therefore be used for the recovery of energy (e.g., biogas, syngas, biodiesel, and bio-oil) and resources (including nutrients, biofertilizers, biochar, heavy metals, and ash for the production of construction materials) [ 47 , 48 , 49 ].…”

Section: Need For a Better Valorization Of Global Waste Streamsmentioning

confidence: 99%

See 1 more Smart Citation

Integrated Biorefinery for a Next-Generation Methanization Process Focusing on Volatile Fatty Acid Valorization: A Critical Review

Koubaa

2024

Molecules

View full text Add to dashboard Cite

This review addresses the critical issue of a rapidly increasing worldwide waste stream and the need for sustainable management. The paper proposes an integrated transformation toward a next-generation methanization process, which leads not only to treating waste but also to converting it into higher value compounds and greener energy. Although the current and commonly used anaerobic digestion process is useful for biogas production, it presents limitations of resource exploitation and some negative environmental impacts. Focusing on the acidogenic stage in waste stream processing, the paper discusses the recent strategies to enhance the recovery of volatile fatty acids (VFAs). These acids serve as precursors for synthesizing a variety of biochemicals and biofuels, offering higher value products than solely energy recovery and soil fertilizers. Additionally, the importance of recycling the fermentation residues back into the biorefinery process is highlighted. This recycling not only generates additional VFAs but also contributes to generating clean energy, thereby enhancing the overall sustainability and efficiency of the waste management system. Moreover, the review discusses the necessity to integrate life cycle assessment (LCA) and techno-economic analysis (TEA) to evaluate the environmental impacts, sustainability, and processing costs of the proposed biorefinery.

show abstract

Section: Need For a Better Valorization Of Global Waste Streamsmentioning

confidence: 99%

Section: Need For a Better Valorization Of Global Waste Streamsmentioning

confidence: 99%

Integrated Biorefinery for a Next-Generation Methanization Process Focusing on Volatile Fatty Acid Valorization: A Critical Review

Koubaa

2024

Molecules

View full text Add to dashboard Cite

show abstract

“…Acidaminococcus and Unclassified acidaminococcus are genera that can hydrolyze the food waste component (carbohydrate and protein) and ferment them to SCFA and hydrogen (Lay et al, 2010). Planococcaceae can produce mainly acetate and hydrogen from carbohydrates during fermentation (Gottardo et al, 2022). The CD nonheated consisted of Lactococcus (10%), Pseudomonas (1%), unclassified Lactocbacillaceae (1%), unclassified Lachnospiraceae (1%), etc.…”

Section: Hydrogen Yieldmentioning

confidence: 99%

Acidogenic Fermentation of Food Waste for Short-Chain Fatty Acids (SCFAs) Production - Effect of Inoculum Type and Heat Pre-Treatment, and pH Under Room Temperature

Jodhani

View full text Add to dashboard Cite

Globally, food waste constitutes a significant fraction of municipal solid waste (MSW), representing up to 30-40% of the total MSW. In Canada, for instance, 35.6 million tonnes of MSW was generated in 2018, of which 30-35% was food waste. A large proportion of this food waste is disposed of in landfills, leading to considerable environmental and economic impacts such as greenhouse gas emissions, biodiversity loss, and high waste management costs. To address this challenge, the development of sustainable and cost-effective technologies that can transform food waste into valuable products has gained attention. Acidogenic fermentation is an emerging biotechnology that utilizes food waste as a substrate to produce high-value products such as short-chain fatty acids (SCFAs), offering a sustainable solution by combining waste management with resource recovery. However, acidogenic fermentation processes have been mostly studied at high temperatures of 35 to 55⁰C. These temperatures are suitable for geographical locations with warmer climates but may require significant energy input for heating in cooler climates like Canada. Therefore, this study aims to evaluate and optimize the acidogenic fermentation process for food waste at room temperature of 22-24⁰C by investigating the impact of inoculum type (anaerobic digested sludge (AD), waste activated sludge (WAS), cow dung slurry (CD)), inoculum pre-treatment (heat pre-treated and nonheated), and pH (7, 9, 12, and uncontrolled) on hydrolysis and SCFA production (acidogenesis).The first part of the study investigated the impact of inoculum type and heat pretreatment of inoculum on the hydrolysis and acidogenesis of food waste. The non-heated inoculums achieved higher hydrolysis, regardless of the inoculum types (AD, WAS, and CD). The AD non-heated achieved the highest hydrolysis yield of 399 gm cum SCOD/kg

show abstract

Screening and performance of efficient lignin-degrading fungal consortium MR

Hu,

Zheng,

Chen

et al. 2024

Biomass Conv. Bioref.

View full text Add to dashboard Cite

Volatile fatty acid production from hydrolyzed sewage sludge: effect of hydraulic retention time and insight into thermophilic microbial community

Cited by 6 publications

References 32 publications

Integrated Biorefinery for a Next-Generation Methanization Process Focusing on Volatile Fatty Acid Valorization: A Critical Review

Integrated Biorefinery for a Next-Generation Methanization Process Focusing on Volatile Fatty Acid Valorization: A Critical Review

Acidogenic Fermentation of Food Waste for Short-Chain Fatty Acids (SCFAs) Production - Effect of Inoculum Type and Heat Pre-Treatment, and pH Under Room Temperature

Screening and performance of efficient lignin-degrading fungal consortium MR

Contact Info

Product

Resources

About