Inoculation with a psychrotrophic-thermophilic complex microbial agent accelerates onset and promotes maturity of dairy manure-rice straw composting under cold climate conditions

Gou, Changlong; Wang, Yuqiong; Zhang, Xiqing; Lou, Yujie; Gao, Yunhang

doi:10.1016/j.biortech.2017.06.097

Cited by 75 publications

(24 citation statements)

References 37 publications

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“…Between days 56 and 78, the bacterial additive in LCI increased the decomposition rate of organic compounds and the production organic acids. At completion of composting, the final pH values were in the range of 7.6–8.0, thus complying with the recommended level of < 9 (Gou et al 2017 ).…”

Section: Resultssupporting

confidence: 71%

“…This must have been due to the production of ammonia from decomposition of proteins and amino acids. With the progress of composting, pH gradually decreased in all three treatments because of CO 2 emissions from degradation of OM (Jiang et al 2015 ), nitrification, and formation of low molecular weight fatty acids (Gou et al 2017 ). As from day 21, pH followed the same trend for CC and CLC.…”

Section: Resultsmentioning

confidence: 99%

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Effect of bacterial inoculation on co-composting of lavender (Lavandula angustifolia Mill.) waste and cattle manure

et al. 2021

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The primary purpose of this study was to investigate the influence of Cellulomonas flavigena and Streptomyces viridosporus, as a bacterial inoculant, on the compostability of post-extraction lavender waste. The major physicochemical, microbiological, and biological properties of the composting materials were monitored for 161 days. The technology developed was shown to improve the compostability of recalcitrant herbal residues. The use of lavender waste beneficially affected the composting process by extending the thermophilic phase, accelerating the degradation of organic matter, and elevating the viable counts of useful microorganisms; however, adverse effects were also observed, including an increased carbon-to-nitrogen ratio (19.05) and a decreased germination index (93.4%). Bacterial inoculation was found to preserve the nitrogen content (2.50%) and improve the efficiency of biodegradation. The Salmonella- and Escherichia coli-free final composting products were mature, stable, and ready for soil application. To the authors’ knowledge, no previous research has investigated the compostability of lavender waste. Likewise, this is the first study that has used strains of C. flavigena and S. viridosporus in combination to facilitate a composting process.

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Section: Resultssupporting

confidence: 71%

Section: Resultsmentioning

confidence: 99%

Effect of bacterial inoculation on co-composting of lavender (Lavandula angustifolia Mill.) waste and cattle manure

et al. 2021

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“…(2012) suggested that as easily degradable organic matter was consumed promptly by active microbial metabolism in the early stage of composting, the composting substrate primarily contained refractory organic matter, such as cellulose and lignin, in the later stage and the degradation of organic matter slowed down. At the same time, the formation of humic substances became vigorous (Gou et al ., 2017). The aforementioned results suggest that the inoculation of MCDOA may be beneficial to both the degradation of organic matter in the initial phase and the formation of humic substances at the late stage of food waste composting (this idea will be demonstrated in the sections titled ‘Humic‐like extract carbon (HEC)’ and ‘The composition of carbon fractions’).…”

Section: Resultsmentioning

confidence: 99%

Effect of inoculation with a microbial consortium that degrades organic acids on the composting efficiency of food waste

Song

Zhang

Xia

et al. 2018

Microbial Biotechnology

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SummaryIn order to overcome the excessive acidification problem, a microbial consortium for the degradation of organic acids (MCDOA), which acts synergistically in degrading organic acids, was developed and used as an inoculum to improve the efficiency of food waste composting. MCDOA could eliminate the initial lag phase of the pile temperature rise because of excessive acidification and effectively shorten the composting period. Fluorescence regional integration analysis of the excitation‐emission matrix spectra of dissolved organic matter showed that compared with raw material, in compost with MCDOA inoculation, the percent fluorescence response (P i,n) values of Regions I, II and IV decreased by 95.11%, 94.19% and 87.41%, respectively, and P i,n of Region V increased by 172.57%. The decreased and increased levels were markedly higher than in the two control groups (MgO and K2 HPO 4 treatment, and uninoculated compost). These findings revealed that MCDOA accelerated the degradation of proteinaceous compounds and the formation of complicated humic‐like materials. Bacterial profiles implied that MCDOA could improve the indigenous bacterial community structure and diversities of acetic and propionic acid‐degrading and lignin‐degrading bacteria, which might account for the high composting efficiency and degree of humification of the inoculated compost.

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“…Step 3. Microbial communities Compost maturity is reached when microbiological decomposition is complete and is accompanied by the mineralization of the components, making them available to the plants, and improving the physical, chemical and biological properties of the soil [62]. According to [46], mixtures of waste with low moisture content inhibit microbial activity.…”

Section: Discussionmentioning

confidence: 99%

Physicochemical and microbiological dynamics in composting of organic waste using a new bioreactor model

Gaspar

Assis

Carvalho

et al. 2020

Preprint

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Background It is important to use renewable resources to minimize the environmental risks and the composting is one of the most sustainable methods for the management of organic waste. Methods The objective of this work was to evaluate the physicochemical dynamics of microorganisms and to study cultivable microorganisms during the composting process of organic residues in a new model of bioreactor. The formulation of a possible cocktail of microorganisms selected for use as a compound accelerator will be further investigated. In addition, the use of two inoculants (non-commercial inoculum (NCI)) and commercial inoculum (CI)) and a control without inoculant during the composting process will be analyzed to evaluate its efficiency. Composting was performed by mixing organic waste from the garden waste and University Restaurant, obtaining an ideal C/N ratio of 30:1. The composting process was carried out in 1 m3 composters with controlled temperature and aeration. Results The thermophilic phase for all treatments was reached by the second day. Mature compost was obtained after an average of 120 days and composting in all treatments showed an increase in the availability of P and micronutrients. During composting, the population of bacteria and actinobacteria were higher than those of yeasts and filamentous fungi. Conclusions Increased composting efficiency was observed when starter cultures were used, the treatments presented advantages such as greater mineralization of P-available and micronutrients as Mn and Zn, in terms of the quality of the final product in comparison to the control treatment.

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Inoculation with a psychrotrophic-thermophilic complex microbial agent accelerates onset and promotes maturity of dairy manure-rice straw composting under cold climate conditions

Cited by 75 publications

References 37 publications

Effect of bacterial inoculation on co-composting of lavender (Lavandula angustifolia Mill.) waste and cattle manure

Effect of bacterial inoculation on co-composting of lavender (Lavandula angustifolia Mill.) waste and cattle manure

Effect of inoculation with a microbial consortium that degrades organic acids on the composting efficiency of food waste

Physicochemical and microbiological dynamics in composting of organic waste using a new bioreactor model

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