Influence of pH on biogas production in a batch anaerobic process of tofu wastewater

WIDYARANI, WIDYARANI; Victor, Y; Sriwuryandari, Lies; Priantoro, E. A.; Sembiring, Tarzan; Sintawardani, Neni

doi:10.1088/1755-1315/160/1/012014

Cited by 19 publications

(21 citation statements)

References 18 publications

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“…https://doi.org/10.5187/jast.2020.62. important parameters to indicate stability during AD and methanogenesis is most active near pH 7 [25], On the other hand, it is inhibited in the condition of over pH 8 [26]. In this study, the pH change seems that it did not inhibit methane production process in all treatments.…”

Section: Stability Ph Contentmentioning

confidence: 47%

“…The experiment was performed using a completely randomized design; treatments were set to a 3 × 3 factorial design using three carbon types (starch, cellulose, and xylan) and three C/N ratios (10,25, and 40) ( Table 1). The AD was carried out using a 125-mL serum bottle at a constant mesophilic temperature (37℃) and it was performed as six replications to measure gas production, gas composition, and fermentation characteristics.…”

Section: Biochemical Methane Potential Testmentioning

confidence: 99%

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Influence of carbon type and carbon to nitrogen ratio on the biochemical methane potential, pH, and ammonia nitrogen in anaerobic digestion

Choi¹,

Ryu²,

Lee³

2020

J Anim Sci Technol

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Organic waste used as a feedstock in the anaerobic digestion (AD), it includes carbon and nitrogen. Carbon and nitrogen have an effect on the various digestive characteristics during AD, however, the study is rare about those of the interaction. This study investigates the influence of carbon type and carbon to nitrogens (C/N ratios) on the AD characteristics of organic waste. Experimental treatments involved a combination of three carbon types with three C/ N ratios. The AD tests were carried out using a 125-mL serum bottle at a constant temperature of 37℃ and moisture 95% for 18 days. Degradation pattern shows the difference among three-carbon treatments, the starch group was faster than other groups. Maximum methane production date was similar between starch (9.96 ± 0.05 day) and xylan group (10.0 ± 0.52 day), those of the cellulose group (14.6 ± 1.80 day) was slower than other groups (p < 0.05). The lag phase was only affected by the carbon type (p < 0.05). Ammonia nitrogen was mainly affected by nitrogen concentration regardless of carbon type (p < 0.05). This study showed that xylan is useful as feedstock in order to decrease the lag phase, and it showed that ammonia was independently affected by the nitrogen concentration.

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Section: Stability Ph Contentmentioning

confidence: 47%

Section: Biochemical Methane Potential Testmentioning

confidence: 99%

Influence of carbon type and carbon to nitrogen ratio on the biochemical methane potential, pH, and ammonia nitrogen in anaerobic digestion

Choi¹,

Ryu²,

Lee³

2020

J Anim Sci Technol

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“…As hydrolysis, acidogenesis, acetogenesis and methanogenesis processes are optimum in pH around 7. A similar strategy was applied to improve the pH inside the reactor when using food waste in the CSTR reactor [55] and tofu wastewater in the batch type reactor [56]. The overall pH of the reactor was fluctuating but was in the optimum range of 6.5-8.2 for methanogenesis during the operation.…”

Section: The Effluent Ph Hrt and Olr During The Ad Processmentioning

confidence: 99%

Effect of Semi-Continuous Anaerobic Digestion on the Substrate Solubilisation of Lignin-Rich Steam-Exploded Ludwigia grandiflora

et al. 2021

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In this study, semi-continuous anaerobic digestion of lignin-rich steam-exploded Ludwigia grandiflora (Lignin = 25.22% ± 4.6% total solids) was performed to understand better the effect of steam explosion on the substrate solubilisation and inhibitors formation during the process. Steam explosion pretreatment was performed at 180 °C for 30 min at a severity factor of 3.8 to enhance the biogas yield of the lignocellulosic biomass. The semi-continuous anaerobic digestion was performed in a continuously stirred tank reactor for 98 days at an initial hydraulic retention time of 30 days and an organic loading rate of 0.9 g-VS L−1day−1. The performed steam explosion pretreatment caused biomass solubilisation, resulting in enhanced biogas production during the process. During the anaerobic digestion process, the average biogas yield was 265 mL g-VS−1, and the pH throughout the operation was in the optimum range of 6.5–8.2. Due to fluctuations in the biogas yield, the hydraulic retention time and organic loading rate were changed on day 42 (50 days and 0.5 g-VS L−1day−1) and on day 49 (40 days and 0.7 g-VS L−1day−1), and 1 M of NaOH was added to the liquid fraction of the steam-exploded L. grandiflora during the latter part of the operation to maintain the stability in the reactor. Therefore, the steam explosion pretreatment helped in the degradation of L. grandiflora by breaking the lignocellulose structure. In addition, changes in the operating conditions of the anaerobic digestion led to an increase in the biogas production towards the end of the process, leading to the stability in the CSTR.

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“…Its treatment by an anaerobic process is much more efficient and cost-effective (Budiyono et al 2013). Much research has been performed to enhance biogas production efficiency in AD; for example, by improving substrate composition (Liu et al 2019), reaction temperature (Membere & Sallis 2018), pre-treatment of high-acidity waste, which affects the efficiency of microbial methane production (Widyarani et al 2018), and improving bacterial nutrition (Bryant et al 1971). It has been reported that:…”

Section: Introductionmentioning

confidence: 99%

Kinetic study of biogas production from anaerobic digestion of vinasse waste

Usmani

Pangkumhang

Wongaree

et al. 2021

Water Practice and Technology

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Vinasse, a sugar-ethanol residue, is used as a substrate for biogas production. The characteristics of the vinasse wastewater used were 216,000 mg-COD/L, pH 4.1, and 68.42 mg/L volatile solids. The sludge/wastewater ratio was controlled at about 1.5−2.0, by weight. Biogas production enhancement was studied in relation to two parameters – Citadel BioCat + , a commercial biocatalyst containing a large microorganism population as the methanogenic bacteria source (5 and 10 g), and reaction temparature (30 and 37 °C). Biogas production kinetics were evaluated. The presence of the biocatalyst enhanced biogas production significantly, as well as reducing the time required for anaerobic digestion. The first-order kinetic model described the biodegradation process. The best results were found using 10 g of biocatalyst at 37 °C – i.e., the optimum results based on biogas production potential (A), the highest biogas production rate (U), the minimum biogas production time (λ), and kinetic organic biodegradability constants (k) of 102.71 mL/g-COD, 11.17 mL/g-COD/d, 0.95 day, and 0.0533 day − 1, respectively. COD removal efficiency was up to 60%.

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Influence of pH on biogas production in a batch anaerobic process of tofu wastewater

Cited by 19 publications

References 18 publications

Influence of carbon type and carbon to nitrogen ratio on the biochemical methane potential, pH, and ammonia nitrogen in anaerobic digestion

Influence of carbon type and carbon to nitrogen ratio on the biochemical methane potential, pH, and ammonia nitrogen in anaerobic digestion

Effect of Semi-Continuous Anaerobic Digestion on the Substrate Solubilisation of Lignin-Rich Steam-Exploded Ludwigia grandiflora

Kinetic study of biogas production from anaerobic digestion of vinasse waste

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