Impact of C/N ratios and organic loading rates of paper, cardboard and tissue wastes in batch and CSTR anaerobic digestion with food waste on their biogas production and digester stability

Shahbaz, Muhammad; Ammar, Muhammad; Korai, Rashid Mustafa; Ahmad, Nadeem; Ali, Awais; Khalid, Muhammad Sarmad; Zou, Dexun; Li, Xiujin

doi:10.1007/s42452-020-03232-w

Cited by 31 publications

(13 citation statements)

References 45 publications

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“…Salinity is however difficult to tackle due to the hightech and high costs involved, while carbon deficiency is normally supplemented by additional biomass inputs [8,9]. Thus, a number of studies have focused on the selection of supplementary materials to combine with shrimp sludge to reach an improved C/N ratio of 25 -30, required for optimizing anaerobic digestion [8,10,11].…”

Section: Introductionmentioning

confidence: 99%

Lab-scale biogas production from co-digestion of super-intensive shrimp sludge and potential biomass feedstocks

TRAN

VAN

HUYNH

et al. 2022

Journal of Energy Systems

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This study evaluated biogas production potentials from local biomass feedstocks comprising of rice straw (RS), steamed lemongrass (SL), bagasse (BA) and desiccated coconut (DC) on superintensive shrimp sludge (SS) anaerobic digestion. A series of batch anaerobic digestion experiments was conducted at an organic loading rate of 50 g-VS L -1 and a C/N ratio of 25 under mesophilic conditions. The results indicate that co-digested biomass substrates are more suitable than single sludge except for DC supplementation, which exhibited a severe pH inhibition for methanogenesis activities. A reactor supplemented with BA achieved the highest overall biogas production (126.78 L kg-VS added -1 ), which increased biogas yields 53.70% compared to a monosludge reactor. Furthermore, reactors with RS and SL increased biogas yields by 26.40% and 29.21%, respectively. Irrespective of initial materials, the H 2 S concentration in biogas compositions was measured at very high levels (23,710 -65,040 ppm) after 10-15 days of digestion, while a decreasing trend was recorded for the remaining digestion period (16 -60 days), yet still maintained relatively high levels (5,873 -9,155 ppm). The study suggests that future works should focus on pH neutralization within the reactor with DC substrates and H 2 S removal in biogas composition.

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Section: Introductionmentioning

confidence: 99%

Lab-scale biogas production from co-digestion of super-intensive shrimp sludge and potential biomass feedstocks

TRAN

VAN

HUYNH

et al. 2022

Journal of Energy Systems

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“…11 The AD process is an environmentally approachable and efficient technique that converts organic wastes, i.e., MSW, FW, into bio-methane, bio-hydrogen, and alcohol which can be consumed to harvest economically low-cost energy. 12,13 Conversely, several elements affect the performance of AD processes, such as feedstock composition, digester design, and operational conditions. 14 The C/N and OLRs are important parameters because they indicate the digester stability and process performance.…”

Section: Introductionmentioning

confidence: 99%

“…The high fraction of lipid and protein in FW is significant to inhibitory levels of TAN and long-chain VFAs. 12 Moreover, the anaerobic microbial populations consume carbon 25-30 times faster than nitrogen. Excessive TAN formation and VFAs can be controlled by a balancing C/N ratio of feedstocks during the AD process.…”

Section: Introductionmentioning

confidence: 99%

“…Many researchers have reported different AD studies, for example, co-digestion of FW with MSW, 14 sewage sludge waste and organic MSW, 8 fruit waste and vegetable waste with cattle manure slurry, 22 fish waste and sisal pulp, 23 cardboard waste, paper waste, and tissue waste into FW. 12 The benefits of balancing the C/N ratio through co-digestion with complimentary feedstock include high biogas yield and reduction of potentially toxic ammonia concentration. 14 AD of MSW with FW can be beneficial due to their stable nutrients, less toxic chemicals, and the synergistic effect of both microorganisms.…”

Section: Introductionmentioning

confidence: 99%

“…14 AD of MSW with FW can be beneficial due to their stable nutrients, less toxic chemicals, and the synergistic effect of both microorganisms. 12 To the best of our information, AD of MSW with FW has been less dedicated, and limited studies are available on the influences of C/N ratios and OLRs of co-substrate feedstocks on biogas fuel production and digester stability the batch AD process.…”

Section: Introductionmentioning

confidence: 99%

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Mesophilic batch co‐digestion of municipal solid waste and food waste: improved digester performance and stability at optimum organic loading rates

Shahbaz

Ammar

Hussain

et al. 2021

J of Chemical Tech & Biotech

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BACKGROUND:The accumulative municipal solid waste (MSW) production calls for emerging efficient technology for its handling. Anaerobic digestion (AD) of MSW provides effective waste volatilization. The high C/N ratio of MSW and increasing organic loading rates (OLRs) are central AD restrictions that affect the AD process performance, inhibition due to aggregation of volatile fatty acids (VFAs), and rapid fall in pH.RESULTS: This study examines the consequence of OLRs on AD of MSW with a high C/N ratio of 406 in food waste (FW) to have a balanced C/N ratio of 30. Three batch scale digesters investigate under mesophilic conditions (35 °C) with OLRs of 10, 15, and 20 gVS L −1 to assess the digester performance and stability in biogas yield, methane yield, and volatile solids (VS) reduction. The cumulative biogas and methane yield are observed to be 1336 and 776 mL gVS −1 , respectively, with a VS reduction rate of 78%, at 10 gVS L −1 . VFA/alkalinity ratio ranges from 0.02 to 0.01 at OLR of 10 and 15 gVS L −1 , which designates a higher buffering capability of the digester. While VFA/alkalinity ratio of 0.48 observes at OLR of 20 gVS L −1 . A rapid deprivation in digester performance and stability finds at ORL of 15 and 20 gVS L −1 . The cumulative biogas yield and methane yield decrease with the increase in OLR from 10 to 20 gVS L −1 .CONCLUSION: This study provided sufficient information for better AD processes and operational circumstances that are an optimum and effective method to convert organic matter to biogas fuel.

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Biomethanisation: Biogas Production Technologies

Szelényi

2022

Production Technologies for Gaseous and Solid Biofuels

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Impact of C/N ratios and organic loading rates of paper, cardboard and tissue wastes in batch and CSTR anaerobic digestion with food waste on their biogas production and digester stability

Cited by 31 publications

References 45 publications

Lab-scale biogas production from co-digestion of super-intensive shrimp sludge and potential biomass feedstocks

Lab-scale biogas production from co-digestion of super-intensive shrimp sludge and potential biomass feedstocks

Mesophilic batch co‐digestion of municipal solid waste and food waste: improved digester performance and stability at optimum organic loading rates

Biomethanisation: Biogas Production Technologies

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