Process Performance of Thermophilic Anaerobic Co-Digestion of Municipal Sewage Sludge and Orange Peel

Szaja, Aleksandra; Golianek, Paweł; Kamiński, Marek

doi:10.12911/22998993/150613

Cited by 2 publications

(1 citation statement)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, in this study, based on experimental data, biogas production rate (BPR) and methane production rate (MPR) were also calculated according to the procedure outlined in a previous study (Szaja et al, 2022a). For statistical analysis, Statsoft Statistica software (v 14) was employed.…”

Section: Kinetic Evaluationmentioning

confidence: 99%

Implementation of solidified carbon dioxide to anaerobic co-digestion of municipal sewage sludge and orange peel waste

Szaja,

Bartkowska

2024

Archives of Environmental Protection

View full text Add to dashboard Cite

The waste production is closely related with human activity. Various approaches have been applied to manage and reduce its increasing volume (Paranjpe et al. 2023). One of the possibilities that comply with the assumptions of circular economy is utilization of wastes in anaerobic digestion (AD) process. This technology is common worldwide and it is recognized as the cost-effective methods of energy generation that also allow for nutrient recovery, as well as effective waste management (Alharbi et al. 2023). The biogas generated within this process is considered as a multifunctional renewable source that might be a promising alternative to the depleting traditional fuels. It finds various applications such as heat and power generation, fuel in automobiles, and substrate in chemical industry (Shitophyta et al. 2022, Pradeshwaran 2024). Typically, biogas contains 50–70% of CH4, 30–50% of CO2, and 1–10% of other trace gases like H2, H2S, CO, N2. Its composition mainly depends on the feedstock characteristics, operational conditions, and adopted technology (Gani et al. 2023, Archana et al. 2024). Considering further application, the priority action should be increasing its volume and methane content. There are several strategies to achieve these goals, including implementing codigestion strategy, adding additional component to the main substrate, introducing trace elements essential in AD, pretreatment strategies, and introducing enzymes and microbial strains to digesters (Zhang et al. 2019). Each method has limits related to the implementation costs, changes in the adopted technology, operator training needs, and additional energy input, which might negatively influence the energy balance of wastewater treatment plants (WWTPs) (Meng et al. 2022). Therefore, recent scientific attention has focused on combining various strategies to achieve intended goals. Moreover, such combinations might allow for an effective utilization of various wastes, the earlier use of which in AD was difficult. Orange waste could be an example of such a substrate. The previous studies indicated that its application in AD resulted in poor process efficiency, mainly due to the presence of limonene, recognized as the main inhibitor of biological activity (Calabro et al. 2020, Bouaita et al. 2022). In this study, the novel concept of implementing solidified carbon dioxide (SCO2) in the anaerobic co-digestion of municipal sewage sludge (SS) and orange peel waste (OPW) has been proposed. This approach may help overcome the disadvantages of the two-component AD of these wastes. Importantly, such studies have not been conducted thus far. However, the recent studies indicated that application of SCO2 to aerobic granular sludge improved biogas and methane yields and also enhanced the kinetics of biogas production (Kazimierowicz et al. 2023 a,b). Importantly, SCO2 might be generated in biogas upgrading technologies (Yousef 2019). Such solution is consistent with the principles of the circular economy and contributes to reducing the carbon footprint of WWTPs.

show abstract

Section: Kinetic Evaluationmentioning

confidence: 99%

Implementation of solidified carbon dioxide to anaerobic co-digestion of municipal sewage sludge and orange peel waste

Szaja,

Bartkowska

2024

Archives of Environmental Protection

View full text Add to dashboard Cite

show abstract

Enhanced Biomethanation: The Impact of Incorporating Fish Waste on the Co-Digestion of Pig Slurry and Orange Pomace

Silva

Fragoso

2023

Energies

View full text Add to dashboard Cite

Anaerobic digestion technology can play a significant role in the transition to a low-carbon and circular economy by producing bioenergy (biomethane) and organic fertilizer (digestate). This study proposes a valorization approach for three waste streams widely produced in the Mediterranean area: fish waste (FW), pig slurry (PS), and orange pomace (OP). The FW lipid content can enhance biomethane yield as long as inhibition by long-chain fatty acids is prevented. In this study, the effect of introducing 25% and 50% FW to the anaerobic co-digestion of a reference mixture consisting of 80% PS and 20% OP pulp (OPP) was studied. Co-digestion using 50% FW presented the maximum biomethane yield (669.68 ± 8.32 mL CH4/g VSadded), which corresponds to a 37% increase compared to the reference. No inhibition was detected during the anaerobic digestion assay. The kinetic study showed that the introduction of FW led to a reduction in the degradation rate constant by up to 30%. The lag phase increased as FW content increased, with 50% FW presenting a lag time approximately three times that of the reference mixture. The proposed strategy can encourage sustainable waste management practices and contribute to GHG emissions mitigation.

show abstract

Process Performance of Thermophilic Anaerobic Co-Digestion of Municipal Sewage Sludge and Orange Peel

Cited by 2 publications

References 46 publications

Implementation of solidified carbon dioxide to anaerobic co-digestion of municipal sewage sludge and orange peel waste

Implementation of solidified carbon dioxide to anaerobic co-digestion of municipal sewage sludge and orange peel waste

Enhanced Biomethanation: The Impact of Incorporating Fish Waste on the Co-Digestion of Pig Slurry and Orange Pomace

Contact Info

Product

Resources

About