Anaerobic Digestion in the 21st Century

Nikolausz, Marcell; Kretzschmar, Jörg

doi:10.3390/bioengineering7040157

Cited by 8 publications

(6 citation statements)

References 13 publications

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“…The term "anaerobic digestion" (AD) refers to the degradation of biomass under anoxic conditions in both natural and engineered systems [5]. Akhiar et al [6] defined anaerobic digestion as a process wherein microorganisms degrade organic matter in the absence of oxygen to produce biogas.…”

Section: Anaerobic Digestion Technologymentioning

confidence: 99%

“…This technology is regarded as the earliest approach toward achieving a circular bioeconomy. Moreover, due to increasing industrial interest, studies on anaerobic microbial processes have greatly improved in identifying the important process parameter and factors that can promote methane production from all types of organic matter, such as manure and slurry [5]. Methane is said to substitute natural gas, especially as it tends to build up opportunities with regard to traditional petrochemistry [7].…”

Section: Anaerobic Digestion Technologymentioning

confidence: 99%

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Recent Advancements in Anaerobic Digestion and Gasification Technology

2023

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In recent times, there has been a growing demand for the use of biomass as an alternative energy due to its sustainable nature. At present, anaerobic digestion and gasification has been proven as a promising technology for exploiting this energy from biomass. This review aims to provide a comprehensive and detailed analysis of the combination of anaerobic and gasification technology as a hybrid system for sustainable waste-to-energy generation. This review reveals that both anaerobic digestion and biomass gasification have been successfully demonstrated as technologies for energy recovery. However, to improve the conversion efficiency in both technologies, the utilization of an intensifier, additive, and enhancer will be required. Moreover, temperature has been identified as a major factor affecting the technologies and should be considered. The bibliometric study conducted revealed that China is the leading country and has set the pace for other countries to follow suit. Subsequently, waste-to-energy research could be easily implemented on a global scale. This study recommends an experimental study of anaerobic digestion and gasification as a hybrid system.

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Section: Anaerobic Digestion Technologymentioning

confidence: 99%

Section: Anaerobic Digestion Technologymentioning

confidence: 99%

Recent Advancements in Anaerobic Digestion and Gasification Technology

2023

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“…Furthermore, Gu et al [116] stated that LFL can be used as fertilizer, which has a societal and environmental benefit. Biological treatment, especially AD, is a powerful method for generating energy from organic waste while treating it [124][125][126]. According to Świechowski et al [127], the best AD results can be obtained by dividing the process into two stages, which are hydrolysis with acidogenesis, and acetogenesis with methanogenesis.…”

Section: Energy Generation From Landfill Leachate Treatmentmentioning

confidence: 99%

State of the Art in Anaerobic Treatment of Landfill Leachate: A Review on Integrated System, Additive Substances, and Machine Learning Application

Zamrisham

Wahab

Zainal

et al. 2023

Water

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Leachates from landfills are highly polluted with a considerable content of organic and inorganic pollutants which pose severe deterioration to environment including soil, groundwater, surface water and air. Several mitigative measures have been applied for effective management of leachate such as biological treatment, engineering device control leachate migration, physical/chemical treatment, and membrane technology. Among the alternatives, anaerobic digestion (AD) is promising, with effective removal of pollutants and high potential for renewable energy production and nutrient recovery. Landfill leachate (LFL) is an excellent source as a substrate in an AD system, with its high content of organic matters. The advantages and disadvantages of AD of LFL were extensively discussed in this review in terms of its potential as a co-substrate, pre-treatment application, and the types and design parameters of the digester. The review critically evaluated the previous studies on leachate treatment using an AD system as well as potential factors which can enhance the treatment efficiency, including the application of an integrated system, additive substances as well as potential inhibition factors. Pre-treatment methods have the potential to meet desired effluent quality of LFL before discharging into receiving bodies. The review also highlighted the application of kinetic modelling and machine learning practices, along with the potential of energy generation in AD of LFL. Additionally, the review explored the various strategies, and recent advances in the anaerobic treatment of LFL, which suggested that there is a requirement to further improve the system, configuration and functioning as a precursor in selecting suitable integrated LFL-treatment technology.

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“…Anaerobic digestion (AD) is widely considered to be a highly effective renewable energy technology [2,3]. In recent years, a multitude of policies, laws, and plans have been introduced globally to support the advancement of bioenergy technologies [4]. Animal manure and crop residues are popular feedstocks for biogas production due to their promising potential [5].…”

Section: Introductionmentioning

confidence: 99%

Synergistic Effects of Anaerobic Co-Digestion of Chicken Manure and Corn Stover in Batch and Continuous Modes

Wang

Yan

et al. 2023

Fermentation

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The present study aimed to evaluate the anaerobic co-digestion process of chicken manure and corn stover to identify the key parameters that influence methane production. Results from both batch and semi-continuous tests showed that co-digestion enhanced methane production, with an optimal chicken manure to corn stover ratio of 2:1 under experimental conditions. When this ratio was maintained, methane production increased by 36% in batch tests, resulting in a biochemical methane potential of 333 mL/g VS. In semi-continuous tests, co-digestion at a hydraulic retention time of 30 days resulted in a methane production increase of 39%, corresponding to a methane yield of 318 mL/g VS. The inclusion of chicken manure proved effective in improving buffer capacity by generating ammonium bicarbonate, which facilitated stable operation during the digestion process. The observed improvement in methane production could be ascribed to the C/N ratio and the increased biodegradability of chicken manure. These findings offer valuable insights into optimizing anaerobic co-digestion to achieve higher methane production levels.

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Anaerobic Digestion in the 21st Century

Abstract: Despite being a mature biotechnological process, anaerobic digestion is still attracting considerable research attention, mainly due to its versatility both in substrate and product spectra, as well as being a perfect test system for the microbial ecology of anaerobes [...]

Cited by 8 publications

References 13 publications

Recent Advancements in Anaerobic Digestion and Gasification Technology

Recent Advancements in Anaerobic Digestion and Gasification Technology

State of the Art in Anaerobic Treatment of Landfill Leachate: A Review on Integrated System, Additive Substances, and Machine Learning Application

Synergistic Effects of Anaerobic Co-Digestion of Chicken Manure and Corn Stover in Batch and Continuous Modes

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