Kinetics on anaerobic co-digestion of bagasse and digested cow manure with short hydraulic retention time

Darwin, Darwin; Fazil, Afrizal; Ilham, Muhammad; Sarbaini,; Purwanto, Satria

doi:10.17221/18/2016-rae

Cited by 16 publications

(13 citation statements)

References 17 publications

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“…Therefore, maintaining and/or controlling appropriate operating conditions (i.e., pH, temperature) are crucial for supporting anaerobic microbes to complete the biodegradation process (Chae et al, 2008;Darwin et al, 2018a). Operational parameters such as organic loading rate (OLR) and hydraulic retention time (HRT) should also be taken into consideration when the process of anaerobic digestion is carried out under a continuous system (González-Fernández et al, 2013;Darwin et al, 2017). Some studies have revealed that anaerobic digestion of wastewater could be effectively operated at the ranges of HRT between 25 and 30 days (Lim et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Removal of Organic Pollutants from Tofu-Processing Wastewater through Anaerobic Treatment Process with Short Hydraulic Retention Time

Darwin

2019

EREM

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Anaerobic digestion of tofu-processing wastewater was carried out in batch and continuous systems. The performance of a continuous system was investigated at the hydraulic retention time of 10 days and the organic loading rate of 0.752 kg/m 3 day. Anaerobic digestion operated in the continuous system generated higher biogas yield (123 mL/g VS) compared with the batch system (43 mL/g VS). The assessment of biodegradation efficiency showed that a continuous reactor had higher VS reduction (76%) in comparison with the batch reactor, which only had 57% VS reduction. The results of the current study also revealed that anaerobic digestion applied for treating the tofu-processing wastewater could recover pH culture from the acidic condition (pH 5) into the level close to the neutral condition (pH 6.6). The current study is highly significant for the development of applied technology for protecting environment.

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Section: Introductionmentioning

confidence: 99%

Removal of Organic Pollutants from Tofu-Processing Wastewater through Anaerobic Treatment Process with Short Hydraulic Retention Time

Darwin

2019

EREM

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“…The temperature for total solid and moisture content analysis was set up at around 105 o C. Samples of total solid and moisture content analysis were then placed in the furnace for measuring ash content at the temperature of 500℃. The analytical procedures were carried out based on the Standard Methods [34,35].…”

Section: Methodsmentioning

confidence: 99%

Carbohydrate Enrichment in In-Vitro Civet Coffee Fermentation: Impact on Arabica Coffee Beans

Darwin,

Bulan,

Hapirayani

et al. 2023

IJDNE

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This study aimed to evaluate the performance of in-vitro fermentation processes on civet coffee, employing a mixed-microbial enrichment culture, and to assess its impact on the physicochemical properties of the fermented product. Arabica Coffee cherries were utilized as the subject in this investigation. The inoculum, derived from civet fecal suspensions, was enriched through the augmentation of various carbohydrates, including soluble (e.g., glucose) and insoluble (e.g., starch) carbohydrates, mirroring the primary components present in civet food. Over an incubation period of four hours, a drop in pH from 7.0 to 5.6 was observed in the cultures, and volatile fatty acid (VFA) was detected at 2.8 mmol/L. It was found that the sugar conversion rate during in-vitro coffee fermentation by the starch-consuming microbial culture (2.1 mM/hour) significantly outperformed that of the glucose-consuming culture (0.9 mM/hour). The caffeine content in in-vitro fermented coffee (0.27-0.28 mg/100g) was found to closely approximate that of in-vivo fermented coffee via civet digestion (0.254 mg/100g). Notably, both in-vitro and in-vivo fermentation yielded caffeine content substantially lower than that of conventionally fermented coffee, which ranged between 1.5 and 2.7 g/100 g. In summary, the fermentation of Arabica coffee cherries using a mixed microbial culture, enriched with starch supplementation (SCM), demonstrated a faster rate compared to a culture enriched with glucose (GCM). The findings provide important insights for optimizing invitro civet coffee fermentation processes.

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“…Anaerobic co-digestion, a novel biotechnological solution, has gained prominence as a promising method for simultaneously managing organic waste and producing renewable energy [2]. The pressing challenges of population growth, urbanization, and industrialization have accentuated the global demand for energy and aggravated the environmental burden of organic waste disposal [3], [4]. As a result, the search for sustainable and efficient waste management solutions has become increasingly critical in the 21st century [5].…”

Section: Introductionmentioning

confidence: 99%

Anaerobic co-digestion of pressmud with vegetable waste in batch reactor for enhanced biogas production

N.,

2023

IJAES

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This study investigates the co-digestion of pressmud, a residue from sugarcane processing, and vegetable waste, with cow dung serving as the inoculum. The aim is to explore the potential of this tripartite mixture to enhance biogas production, streamline waste management, and contribute to sustainable energy generation. In recent years, the escalating concerns surrounding environmental sustainability and waste management have prompted significant research into innovative and eco-friendly approaches. Anaerobic co-digestion has a potential to enhance biogas yields beyond what is achievable with individual substrates. The complementary nature of diverse organic materials can stimulate microbial activity, leading to increased methane production. Additionally, co-digestion can alleviate challenges associated with certain substrates, such as the presence of inhibitory compounds or imbalanced nutrient ratios, by leveraging the compensatory attributes of other materials. The anaerobic co-digestion was carried out through the substrate and inoculum ration of 1:1. The digestion of pressmud and vegetable waste was carried out at different ratio of PM:VW (100:0, 70:30, 50:50, 30:70, 0:100) in one litre reagent bottle. The batch study was conducted for the period of 30 days. The methane gas was measured directly by passing the biogas into the alkaline solution by water displacement method. The effect of pH was noted throughout the study. Results shows that least methane yield was obtained in the ration 50:50 (PM: VW) and maximum methane yield was obtained in the 30:70 (PM: VW).

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Kinetics on anaerobic co-digestion of bagasse and digested cow manure with short hydraulic retention time

Cited by 16 publications

References 17 publications

Removal of Organic Pollutants from Tofu-Processing Wastewater through Anaerobic Treatment Process with Short Hydraulic Retention Time

Removal of Organic Pollutants from Tofu-Processing Wastewater through Anaerobic Treatment Process with Short Hydraulic Retention Time

Carbohydrate Enrichment in In-Vitro Civet Coffee Fermentation: Impact on Arabica Coffee Beans

Anaerobic co-digestion of pressmud with vegetable waste in batch reactor for enhanced biogas production

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