A review on anaerobic digestion with focus on the role of biomass co-digestion, modelling and optimisation on biogas production and enhancement

Kunatsa, Tawanda; Xia, Xiaohua

doi:10.1016/j.biortech.2021.126311

Cited by 135 publications

(43 citation statements)

References 89 publications

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“…가축 분뇨를 혐기성 소화로 처리하면 메탄과 같은 바이오 가스를 얻을 수 있고, 메탄 생성 효율을 향상시키기 위한 다 양한 연구가 수행되고 있다 [3,4]. 가축 분뇨의 혐기성 소화를 통한 메탄 생성에 영향을 주는 다양한 영향 인자들에는 반응 기 운전방식, 전처리 방법, pH 조건, 탄소-질소(C/N)비 등 이 포함된다 [5,6]. 가축 분뇨의 혐기성 소화를 위해 기존 연 구에서 사용한 반응기 운전방식은 크게 회분식 반응기와 연 속식 반응기로 나눠볼 수 있다 [7][8][9][10].…”

Section: 서 론unclassified

Effect of Rice Straw on Methane Production Potential of Cow Manure

Park¹,

Jang²,

Zhao³

et al. 2022

Korean Journal of Environmental Agriculture

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BACKGROUND: Animal manures are one of the biggest sources of greenhouse gases and improper manage-ment of animal wastes contributes to the increasing greenhouse gases in the atmosphere. Con-verting greenhouse gases generated from animal manures to energy is one way of contributing to the net-zero carbon emissions.METHODS AND RESULTS: The potential for methane production from cow manure (CM) was studied by measuring the methane yield using the biochemical methane potential (BMP) test. In particular, the effect of co-digestion using rice straw (RM) on the methane production was studied. The methane yields from the co-digestion of CM and RS were statistically similar to that from the mono-digestion of CM or RS. But there was a synergy effect at the CM:RS ratio of 1:2 and 1:1. This can be attributed to the increased C/N ratio. The changed microbial community structure with the addition of substrates (CM, RS) probably led to the increase in the methane produc-tion. CONCLUSION(S):The methane production potential of the particular CM used in this study was not improved by the addition of RS as a co-substrate. The addition of substrates to the anaerobic sludge promoted the increase in the microbial species having synergetic relationship with methano-gens, and this can partially explain the increase in the methane production with the addition of substrates. Overall, there are needs for further studies to improve the methane yield from CM.

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Section: 서 론unclassified

Effect of Rice Straw on Methane Production Potential of Cow Manure

Park¹,

Jang²,

Zhao³

et al. 2022

Korean Journal of Environmental Agriculture

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“…Mathematical modeling of the AcoD process is required to forecast the effect of two or more organic matter mix ratio, organic loading levels, the method for choice of the substrate, output estimation, production optimization, process failure prevention, and instabilities. A comprehensive description of the bio-conversion mechanism is provided with numerous dynamic models [70][71][72]. In this study, the Modi ed Gompertz model, Modi ed Logistic model, and First-order models were used.…”

Section: Kinetic Studymentioning

confidence: 99%

Effect of chemical composition on the anaerobic co-digestion of source segregated organic fraction of municipal solid wastes

Jakki

Ahammed

Parsai

2022

Preprint

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Recently waste to energy projects gaining more attraction due to rapid waste generation due to increased urbanization. Improper municipal solid waste (MSW) treatment resulting in environmental risks such as air pollution, ground, and surface water contamination. Anaerobic digestion (AD) is the best method to treat organic solid waste. Mono-AD of organic fraction of municipal solid wastes (OFMSW) leads to lower methane yield due to the accumulation of volatile fatty acids (VFAs). Mixing of two or more substrates (Co-digestion) dilutes the toxic compounds and increases the methane yield by providing proper environment for microbes. In this study anaerobic co-digestion (AcoD) of source segregated OFMSW (particularly food waste, fruit waste, and vegetable waste) with chicken fecal matter (co-substrate), and cow dung (inoculum) was investigated by using batch studies (Duration of 30 days). AcoD carried out in three different batch reactors viz. R1 (food mix), R2 (vegetable mix), and R3 (fruit mix) feed with substrates (S1& S2) and inoculum (I) (S1: S2: I = 0.5:0.5:2). The methane percentage obtained for reactor R1 was 69.60%, which is higher compared to the other reactors (R2- 61.2%, and R3- 57.37%). R1 reactor had higher methane yield due to its higher lipids (higher VFAs), and proteins (sufficient buffer capacity). R3 reactor had lowest methane yield due to its highest carbohydrates (rapid acidification), and lower proteins (lower buffer capacity). Modified Gompertz model gave better results near to experimental studies. The present study proved that mixing OFMSW with proper co-substrate (protein-rich) increases the methane yield by providing proper buffer capacity.

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“…The main advantages of this method are increased biogas production and improved process stability. However, successful implementation of this strategy largely depends on selecting a suitable component as well as determining the appropriate operational conditions, such as volumetric ratio, type of inoculum and temperature (Kunatsa and Xia, 2022). Thus far, OP has been co-digested with cow dung (Mandal and Mandal, 1997), organic fraction of municipal solid waste (Forgács et al, 2012;Bouaita et al, 2022), glycerol (Martín et al, 2012), food waste (Anjum et al, 2017), and marine seaweed (Negro et al, 2020).…”

Section: Introductionmentioning

confidence: 99%