Biofertilizer production via composting of digestate obtained from anaerobic digestion of post biocoagulation sludge blended with saw dust: Physiochemical characterization and kinetic study

Ezemagu, I.G.; Ejimofor, M.I.; Menkiti, Matthew Chukwudi; Diyoke, Chidiebere

doi:10.1016/j.envc.2021.100288

Cited by 20 publications

(12 citation statements)

References 33 publications

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“…This system is separated into four stages: supply of raw materials, production of biogas, utilization of solids produced by biogas (digestate), and utilisation of biogas. Digestate is the material left after the anaerobic decomposition of biodegradable raw materials [21].…”

Section: Life Cycle Assessment On Coconut Oil Product 331 Materials A...mentioning

confidence: 99%

Life cycle assessment of coconut oil product

Yani

Toruan

Puspaningrum

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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The objective of this study was to analyse the life cycle of the coconut oil industry and process improvement alternatives. The life cycle analysis (LCA) method are based on the scope of the gate to gate. This study shows that the input for coconut oil production consists of copra as the main raw material and several supporting materials and energy. The outputs are coconut oil, coconut pulp pellets, and waste (liquid, solid, and gas). The total potential GHG emissions, acidification, and eutrophication per-kg-coconut-oil-products are 2.9271 kg-CO2 eq, 0.0178 kg-SO2-eq, and 0.0145 kg-PO4-3-eq. The highest GHG emissions produced from the Crude Coconut Oil Plant sub-system was 1.2045 kg-CO2eq per-kg-coconut-oil. The acidification potential produced from the Boiler Plant and Transportation sub-system with the potential value was 0.0094 kg-SO2-eq and 0.0084 kg-SO2-eq per-kg-coconut-oil, respectively. The eutrophication potential produced from the Boiler Plant and Transportation sub-system with a potential value was 0.0026 kg-PO4-3-eq and 0.0119 kg PO4-3-eq pe- kg-coconut-oil, respectively. Optimization of energy usage can be done by optimizing fuel, water, and electricity in each sub-system of coconut oil production. The NEV and NER values result in 40,998,456 MJ and 1.0971, respectively.

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Section: Life Cycle Assessment On Coconut Oil Product 331 Materials A...mentioning

confidence: 99%

Life cycle assessment of coconut oil product

Yani

Toruan

Puspaningrum

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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“…Anaerobic sludge is favored by high values in TSS and SSV parameters because their presence indicates a higher organic loading rate and more biogas generation [30]. Temperature and pH are important and controlling factors in the use of anaerobic sludge because they significantly affect the process [31]. Finally, the characterization of these parameters allows determining that the collected sludge has optimal characteristics for the growth of microorganisms and that it is suitable for use as inoculum in biodegradability tests [24].…”

Section: Characterization Of Inoculum (Sludge)mentioning

confidence: 99%

Heterogeneous photocatalysis and an anaerobic biological process for leachate treatment

Moreno¹,

Cáceres²,

Lázaro³

et al. 2022

Cienc. En Desarro.

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The research used a coupling heterogeneous photocatalysis (TiO2-UVsolar) and an anaerobic biological process (Specific Methanogenic Activity Test) to study the treatment of leachate from a landfill in Norte de Santander (Colombia). It developed photocatalysis in a Composite Parabolic Collector (CPC), H2O2 as oxidation assistant, and the combination of different TiO2 levels and pH modeled with a factorial design 32. In the biological test, for a maximum load of 4,500 mg. L-1 of Chemical Oxygen Demand (COD) leachate, 2.0 g. L-1 of Volatile Suspended Solids (VSS) inoculum, and a hydraulic retention time of 23 days, there were no significant COD removal percentages, evidencing the recalcitrant character of these leachates. In the Advanced Oxidation Process (AOP) there was mineralization in terms of DOC of 57%, which evidences the capacity of the process to support the pollutant load of the leachate. The combined process (AOP-Biological) allows additional mineralization in terms of DOC of 21% in the biological process, for a total contribution of the coupling of 78%, which shows the capacity of the AOP to convert toxic wastewater into one with characteristics more suitable for its subsequent degradation in anaerobic biological reactors.

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“…Ezemagu et al, 2021;Franke-Whittle et al, 2014a;Tambone et al, 2015b). words, CR + FW and CR + FW + FRW as shown is a mean effect of the individual digestate resulting from the combination of components.…”

mentioning

confidence: 92%

“…Nonetheless, while the anaerobic digestion (AD) of organic waste to biogas is vital to improving energy security, as well as to diversify the energy mix in pursuit of SDG 7, the resulting digestate from the AD process has the potential to be utilized as bio-fertilizer for crop production (SDG 3). However, digestate nutrient value is a function of both the type of substrate digested and the digestate recovered after digestion (Ezemagu et al, 2021). In other words, digestates might present an imbalanced nutritional pro le for particular crops' growth requirements.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Aerobic Microbial Activity of Ash and Vegetable-Amended Digestate

Isagba¹,

Ajieh

Oshoma

et al. 2022

Preprint

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Anaerobic digestion (AD) of organic wastes results in biogas and digestate production. The digestate from AD may fall short of vital nutrients required for an optimal plant growth due to feedstock quality. Thus, digestate amendment with biomass and aerobic metabolic activities becomes an essential process for nutrient enhancement. This study aimed to investigate the microbial quality of digestate amended with wood ash, and vegetable matter during treatment. Digestate from cattle rumen (CR), food waste (FW), fruit waste (FRW); and their combinations were obtained. The various digestates were amended with wood ash, vegetable matter and a blend of both. Amendment was carried out for a duration of 5 weeks and samples were analyzed weekly. Enumeration and identification of bacteria and fungi were carried on culture media. The rhizobacterial potential of the identified bacterial isolates was also investigated using standard procedures. The results showed high bacteria and fungal loading in the amended digestate from the first to the fourth week. Comparatively, cattle rumen and food waste digestate, amended with vegetable were highly significant with mean value of 0.8 and 0.6 respectively. The identified bacterial isolates, Bacillus subtilis, Salmonella sp, Pseudomonas sp, Proteus sp, Enterobacter sp, Chromobacterium sp Bacillus spp. and Escherichia coli were found to be involved in solubilization of phosphate, nitrogen fixation, ammonia production and induction of indole acetic acid. Specifically, digestate amended with vegetable waste improved the soil nutrient compared to the wood ash in both bacterial and fungal load. Hence, digestate amendment is crucial for nutrient enhancement, increase in carbon level and overall, improves soil nutrient.

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Biofertilizer production via composting of digestate obtained from anaerobic digestion of post biocoagulation sludge blended with saw dust: Physiochemical characterization and kinetic study

Cited by 20 publications

References 33 publications

Life cycle assessment of coconut oil product

Life cycle assessment of coconut oil product

Heterogeneous photocatalysis and an anaerobic biological process for leachate treatment

Assessment of Aerobic Microbial Activity of Ash and Vegetable-Amended Digestate

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