Polyhydroxyalkanoate production from fermentation of domestic sewage sludge monitoring greenhouse gas emissions: A pilot plant case study at the WRRF of Palermo University (Italy)

Mannina, Giorgio; Mineo, Antonio

doi:10.1016/j.jenvman.2023.119423

Cited by 8 publications

(1 citation statement)

References 45 publications

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“…The overall process has a PHA yield of 0.72 (YP/x) and productivity of 0.19 g.L − 1 .h − 1 [ 164 ]. PHA production from sewage sludge at a continuous stirred tank pilot scale bioreactor (225 L) showed that domestic sewage sludge can be a good feed as a PHA yield of 0.37 g PHA .g VFAs was obtained even with low organic loading of 0.06 Kg BOD .Kg SS −1 .day − 1 [ 86 ].…”

Section: Bioprocess Parameter Affect and Scaleup Studiesmentioning

confidence: 99%

A review on microbes mediated resource recovery and bioplastic (polyhydroxyalkanoates) production from wastewater

Ahuja,

Singh,

Mahata

et al. 2024

Microb Cell Fact

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Background Plastic is widely utilized in packaging, frameworks, and as coverings material. Its overconsumption and slow degradation, pose threats to ecosystems due to its toxic effects. While polyhydroxyalkanoates (PHA) offer a sustainable alternative to petroleum-based plastics, their production costs present significant obstacles to global adoption. On the other side, a multitude of household and industrial activities generate substantial volumes of wastewater containing both organic and inorganic contaminants. This not only poses a threat to ecosystems but also presents opportunities to get benefits from the circular economy. Main body of abstract Production of bioplastics may be improved by using the nutrients and minerals in wastewater as a feedstock for microbial fermentation. Strategies like feast-famine culture, mixed-consortia culture, and integrated processes have been developed for PHA production from highly polluted wastewater with high organic loads. Various process parameters like organic loading rate, organic content (volatile fatty acids), dissolved oxygen, operating pH, and temperature also have critical roles in PHA accumulation in microbial biomass. Research advances are also going on in downstream and recovery of PHA utilizing a combination of physical and chemical (halogenated solvents, surfactants, green solvents) methods. This review highlights recent developments in upcycling wastewater resources into PHA, encompassing various production strategies, downstream processing methodologies, and techno-economic analyses. Short conclusion Organic carbon and nitrogen present in wastewater offer a promising, cost-effective source for producing bioplastic. Previous attempts have focused on enhancing productivity through optimizing culture systems and growth conditions. However, despite technological progress, significant challenges persist, such as low productivity, intricate downstream processing, scalability issues, and the properties of resulting PHA. Graphical abstract

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Section: Bioprocess Parameter Affect and Scaleup Studiesmentioning

confidence: 99%

A review on microbes mediated resource recovery and bioplastic (polyhydroxyalkanoates) production from wastewater

Ahuja,

Singh,

Mahata

et al. 2024

Microb Cell Fact

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Sludge reduction, nitrous oxide emissions, and phosphorus removal by oxic-settling-anaerobic (OSA) process: the effect of hydraulic retention time

Mannina,

Cosenza,

Di Trapani

et al. 2024

Environ Sci Pollut Res

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This paper presents a study on reducing sewage sludge by an oxic-settling-anaerobic (OSA) pilot plant compared to the conventional activated sludge (CAS) process in view of resource recovery and moving towards plant carbon neutrality. The OSA plant was supplied with real wastewater and the anaerobic reactor was operated under two hydraulic retention times (HRT) (4 and 6 h). Greenhouse gas (GHG) emissions were monitored for the first time to determine the OSA process’s production mechanism. The results highlighted that under the lowest HRT (4 h), the removal efficiencies of COD and PO4−P, increased from 75 to 89% and from 39 to 50% for CAS and OSA configurations, respectively. The observed yield coefficient was reduced from 0.58 gTSS gCOD−1 (CAS period) to 0.31 gTSS gCOD−1 (OSA period). A remarkable deterioration of nitrification efficiency under OSA configuration was obtained from 79% (CAS) to 27% (OSA with HRT of 6 h). The huge deterioration of nitrification significantly affected the GHG emissions, with the N2O-N fraction increasing from 1% (CAS) to 1.55% (OSA 4 h HRT) and 3.54% (OSA 6 h HRT) of the overall effluent nitrogen, thus suggesting a relevant environmental implication due to the high global warming potential (GWP) of N2O. Graphical abstract

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Enhancing volatile fatty acid production from sewage sludge in batch fermentation tests

Mineo,

Di Leto,

Cosenza

et al. 2024

Chemosphere

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Polyhydroxyalkanoate production from fermentation of domestic sewage sludge monitoring greenhouse gas emissions: A pilot plant case study at the WRRF of Palermo University (Italy)

Cited by 8 publications

References 45 publications

A review on microbes mediated resource recovery and bioplastic (polyhydroxyalkanoates) production from wastewater

A review on microbes mediated resource recovery and bioplastic (polyhydroxyalkanoates) production from wastewater

Sludge reduction, nitrous oxide emissions, and phosphorus removal by oxic-settling-anaerobic (OSA) process: the effect of hydraulic retention time

Enhancing volatile fatty acid production from sewage sludge in batch fermentation tests

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