Effect of mixing ratio of food waste and rice husk co-digestion and substrate to inoculum ratio on biogas production

Haider, Muhammad Rizwan; Sheikh, Zeshan; Yousaf, Sohail; Malik, Riffat Naseem; Visvanathan, Chettiyappan

doi:10.1016/j.biortech.2015.02.105

Cited by 170 publications

(69 citation statements)

References 25 publications

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“…Mechanical pretreatment such as ultrasonication has been widely used to pretreat the sludge prior to anaerobic digestion [18]. Low frequencies (20-40 kHz) are known to provide the most efficient treatment, resulting in biogas enhancement by 24-140% in batch systems and 10-45% in continuous/semi-continuous systems [2].…”

Section: Introductionmentioning

confidence: 99%

Maximizing biogas production by pretreatment and by optimizing the mixture ratio of co-digestion with organic wastes

Lee

Park

Shin

et al. 2019

Environmental Engineering Research

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Anaerobic digestion is a popular sewage sludge (Ss) treatment method as it provides significant pollution control and energy recovery. However, the low C/N ratio and poor biodegradability of Ss necessitate pretreatment methods that improve solubilization under anaerobic conditions in addition to anaerobic co-digestion with other substrates to improve the process efficiency. In this study, three pretreatment methods, namely microwave irradiation, ultrasonication, and heat treatment, were investigated, and the corresponding improvement in methane production was assessed. Additionally, the simplex centroid design method was utilized to determine the optimum mixture ratio of food waste (Fw), livestock manure (Lm), and Ss for maximum methane yield. Microwave irradiation at 700 W for 6 min yielded the highest biodegradability (62.0%), solubilization efficiency (59.7%), and methane production (329 mL/g VS). The optimum mixture ratio following pretreatment was 61.3% pretreated Ss, 28.6% Fw, and 10.1% Lm. The optimum mixture ratio without pretreatment was 33.6% un-pretreated Ss, 46.0% Fw, and 20.4% Lm. These results indicate that the choice of pretreatment method plays an important role in efficient anaerobic digestion and can be applied in operational plants to enhance methane production. Co-digestion of Ss with Fw and Lm was also beneficial.

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Section: Introductionmentioning

confidence: 99%

Maximizing biogas production by pretreatment and by optimizing the mixture ratio of co-digestion with organic wastes

Lee

Park

Shin

et al. 2019

Environmental Engineering Research

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“…The gas production was measured for an optimal period of time using a Gas Chromatography (GC) device. This investigation was performed in accordance with the method described by APHA (2005) [17], and the Automatic Methane Potential Test System (AMPTS) II which is widely adopted as a standardized method for Biomethane Potential (BMP) testing [18]. …”

Section: Experimental Set-upmentioning

confidence: 99%

Impact of Substrate Composition in Biomethane Production under Thermophilic Conditions

Bambokela¹,

Matheri²,

Belaid³

et al. 2016

International Conference on Advances in Science, Engineering, Technology and Natural Resources (ICASETNR-16) Nov. 24-25, 2016 P

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Abstract-In this investigation, the anaerobic digestion (AD) results from different substrates were evaluated. By means of two co-digestion processes with cow dung, a good performance was observed in the first process and a poor production trend was seen in the second one. NaOH was used as chemical absorbent in two different bottles in the CO2 fixing unit to compare the volume of biomethane produced after purification. A batch anaerobic co-digestion was carried out in 500 mL digesters placed into a water bath at 45°C and maintained at the initial pH of 7. Important AD factors such as pH, Carbon and Nitrogen ratio (C/N), concentration, substrate composition were considered. Through an ultimate analysis, amount of Carbon (C), Hydrogen (H), Nitrogen (N), and Sulphur (S) were also discussed. The toxicity of other elements found in substrates appeared higher in the second process than in the first. It was concluded that the inhibitory elements identification and control before the biogas production process were primordial.

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“…Therefore, improving the efficiency of biogas production also requires improving the characteristics of the feedstock and operating conditions of the digester.It is also well established that the co-digestion of two or more feedstocks produces a higher methane yield than a single feedstock [6,7]. Co-digestion is the process of mixing two or more substrates and digesting them simultaneously.…”

mentioning

confidence: 99%

“…The function of co-digestion during AD includes balancing nutrients (C/N ratio, micro-and macro-nutrients), pH regulation, and dilution of inhibitors/toxic compounds [5,7,11]. These highlight the fact that co-digestion could be a simpler method to improve the feedstock characteristics and digester operating conditions.…”

mentioning

confidence: 99%

“…This is because the addition of nitrogen-rich substrates such as animal manure/slurries will help balance the C/N ratio of carbon-rich plant residues [12,13]. Co-digestion of energy crop residue with a nitrogen-rich substrate will mitigate the rapid acidification of the digester by the high lignin content of plant residue [7]. Furthermore, it will ease the utilisation of energy crops by microorganisms and improve biogas production and methane yield.…”

mentioning

confidence: 99%

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Co-Digestion of Animal Manure and Cassava Peel for Biogas Production in South Africa

2017

Nov. 27-28, 2017 South Africa ASETWM-17, RCABES-17 &Amp; EBHSSS-17

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Abstract-Global energy demand is on the rise due to continuous increases in population, economic growth, and energy usage. Several studies have been done on biogas, but in South Africa, these are biased towards industrial wastewater. Therefore, there is need to explore other alternatives for biogas generation, for example energy crops such as fodder beets and cassava, on which studies are limited. Cassava has several advantages compared to other crops, including the ability to grow on degraded land and where soil fertility is low. It also has the highest yield of carbohydrate per hectare (4.742 kg/carb) apart from sugarcane and sugar beet, which makes it suitable for bioenergy (biogas) generation. This study was designed to determine the performance of co-digestion of cassava peel (CP) with cattle manure (CM) at different ratios, as well as to study the effect of the mixed ratios on methane yield through batch anaerobic digestion. All digesters were run simultaneously under mesophilic temperatures of 35 ± 1 °C. The digestion was carried out in 600 mL SCHOTT DURAN® glass laboratory bottles. The results showed that co-digestion influenced biogas production and methane yield. The final cumulative methane yields by the co-digestion of CM and CP at the CM:CP mixing ratios of 80:20 and 20:80 were 738.76 mL and 838.70 mL, respectively. The corresponding average daily methane yields were 18.42 mL/day and 20.97 mL/day. This indicates that CP enhanced the production of methane in the co-digestion process with the 20:80 CM:CP ratio.

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Effect of mixing ratio of food waste and rice husk co-digestion and substrate to inoculum ratio on biogas production

Cited by 170 publications

References 25 publications

Maximizing biogas production by pretreatment and by optimizing the mixture ratio of co-digestion with organic wastes

Maximizing biogas production by pretreatment and by optimizing the mixture ratio of co-digestion with organic wastes

Impact of Substrate Composition in Biomethane Production under Thermophilic Conditions

Co-Digestion of Animal Manure and Cassava Peel for Biogas Production in South Africa

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