Serial completely stirred tank reactors for improving biogas production and substance degradation during anaerobic digestion of corn stover

Li, YuQian; Liu, Chunmei; Wachemo, Akiber Chufo; Yuan, Hairong; Zou, Dexun; Liu, Yan-Ping; Li, Xiujin

doi:10.1016/j.biortech.2017.03.058

Cited by 42 publications

(18 citation statements)

References 24 publications

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“…In order to enhance the biogas production and assuring stability of the AD process, different strategies have been implemented. These methods include co-digestion with dissimilar substrates (to overcome obstacles as non-optimal C:N ratio or limited nutrients availability) (Luo and Angelidaki, 2013;Siddique and Wahid, 2018), pretreatments of recalcitrant substrate (to release the bio-degradable organic matter for microbial attack) (Dahunsi et al, 2017;Tsapekos et al, 2018b), modifying reactor configuration (Li et al, 2017), adjusting operation conditions (Leitão et al, 2006), and addition of organic/inorganic additives (to stimulate microbial activity) (Nzila, 2017;M S Romero-Güiza et al, 2016). Additives used to enhance the biogas production in AD processes can be classified into organic and inorganic additives.…”

Section: Introductionmentioning

confidence: 99%

Application of nano-structured materials in anaerobic digestion: Current status and perspectives

et al. 2019

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Nanotechnology is gaining more attention in biotechnological applications as a research area with a huge potential. Nanoparticles (NPs) can influence the rate of anaerobic digestion (AD) as the nano-sized structures, with specific physicochemical properties, interact with substrate and microorganisms. The present work has classified the various types of additives used to improve the AD processes. Nanomaterials as new additives in AD process are classified into four categories: Zero-valent metallic NPs, Metal oxide NPs, Carbon based nanomaterials, and Multi-compound NPs. In the following, application of nanomaterials in AD process is reviewed and negative and positive effects of these materials on the AD process and subsequently biogas production rate are discussed. This study confirms that design and development of new nano-sized compounds can improve the performances of the AD processes.

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Section: Introductionmentioning

confidence: 99%

Application of nano-structured materials in anaerobic digestion: Current status and perspectives

et al. 2019

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“…also the up-flow anaerobic sludge blanket (UASB) (Ariunbaatar et al 2014;Giwa et al 2019b). The CSTR can run with a continuous flow of reactants and products at a steadystate; it is one of the most generally applied bioprocesses for high solid feed like wet FW AD (MacLellan et al 2013;Li et al 2017). The single CSTR cannot maintain a superior amount of fermenting microbes owing to its speedy mixing working pattern (Saratale et al 2019).…”

Section: Introductionmentioning

confidence: 99%

“…The single CSTR cannot maintain a superior amount of fermenting microbes owing to its speedy mixing working pattern (Saratale et al 2019). Problems associated with a single CSTR can be mitigated via connecting two reactors in series to improve the digestibility rate while generating more biogas (Li et al 2017). Boe and Angelidaki (2009) reported 11% higher biogas production in the CSTR serial digestion than a conventional CSTR during sewage sludge treatment.…”

Section: Introductionmentioning

confidence: 99%

The resource recovery potential of blackwater and foodwaste: anaerobic co-digestion in serial semi-continuous stirred tank reactors

Giwa

Memon

Vakili

et al. 2021

Int. J. Environ. Sci. Technol.

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The sustainable management of household food waste (FW) and household blackwater (BW) is becoming more challenging. This research investigated three different semi-continuous stirred tank reactor (CSTR) performances for digestion of the mixture of BW and FW; for producing biogas. Through the application of the serial semi-CSTR digestion (35 °C), the produced biogas from the BW-FW (1:1 proportion) offered to be higher than the single semi-CSTR 55 °C (25%) and that of the single semi-CSTR 35 °C (31%). The serial semi-CSTR higher biogas volume production was attributed to the extra biogas generated from the residual organic matter and residual volatile fatty acids decomposition existing in the digestate of the first reactor and further utilized in the second-step methanogenic reactor chamber. The serial semi-CSTR physicochemical parameters showed stable performance with total chemical oxygen demand reduction efficiency of 97%, and without inhibition at the pH value of 8.5 ± 0.9. The serial semi-CSTR 35 °C digestion offered the advantages for improving the worth of resources recovered from FW and the BW to accomplishing a higher biogas percentage and enhanced sludge stabilization for water resources and waste management.

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“…The efficient conversion of straw to methane is limited by the recalcitrant lignocellulosic structure of straw, resulting in the low susceptibility of its lignocelluloses to hydrolysis [ 3 ]. However, these problems of poor biodegradability and low efficiency of AD when using straw have been widely researched [ 3 – 5 ], whereas research into the fundamental process changes involved in AD is limited.…”

Section: Introductionmentioning

confidence: 99%

Carbon migration and metagenomic characteristics during anaerobic digestion of rice straw

Chen

Zuo

et al. 2020

Biotechnol Biofuels

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Background: Considerable interest has been expressed in the development of anaerobic digestion (AD) of straw to solve the environmental problems caused by the dumping and burning of straw and to generate clean energy. However, the poor biodegradability of straw and the low efficiency of energy generation achieved during its AD are problematic. Studying the parameter changes involved in the process of AD is helpful for clarifying its micro-mechanisms and providing a theoretical basis for improving its efficiency. Currently, most research into process parameters has focused on gas production, methane content, pH, and volatile fatty acid (VFA) content; limited research has focused on carbon migration and functional gene changes during the AD of straw. Results: Carbon migration and changes in metagenomic characteristics during the AD of rice straw (RS) were investigated. Accumulated biogas production was 388.43 mL/g VS. Carbon in RS was consumed, and the amount of carbon decreased from 76.28 to 36.83 g (conversion rate 51.72%). The degree of hydrolysis rapidly increased during the first 5 days, and a large amount of carbon accumulated in the liquid phase before migrating into the gas phase. By the end of AD, the amount of carbon in the liquid and gas phases was 2.67 and 36.78 g, respectively. According to our metagenomic analysis, at the module level, the abundance of M00357, M00567, M00356, and M00563 (the modules related to the generation of methane) during AD were 51.23-65.43%, 13.96-26.88%, 16.44-22.98%, and 0.83-2.40%, respectively. Methyl-CoM, 5-methyl-5,6,7,8-tetrahydromethanopterin, and Acetyl-CoA were important intermediates. Conclusions: Carbon was enriched in the liquid phase for the first 5 days and then gradually consumed, and most of the carbon was transferred to the gas phase by the end of AD. In this study, AD proceeded mainly via aceticlastic methanogenesis, which was indicated to be a dominant pathway in methane metabolism. Batch AD could be divided into three stages, including initiation (days 1-5), adaptation (days 6-20), and stabilization (days 21-50), according to biogas production performance, carbon migration, and metagenomic characteristics during AD.

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Serial completely stirred tank reactors for improving biogas production and substance degradation during anaerobic digestion of corn stover

Cited by 42 publications

References 24 publications

Application of nano-structured materials in anaerobic digestion: Current status and perspectives

Application of nano-structured materials in anaerobic digestion: Current status and perspectives

The resource recovery potential of blackwater and foodwaste: anaerobic co-digestion in serial semi-continuous stirred tank reactors

Carbon migration and metagenomic characteristics during anaerobic digestion of rice straw

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