Effect of cold-adapted microbial agent inoculation on enzyme activities during composting start-up at low temperature

Sun, Qingping; Wu, Di; Zhang, Zhechao; Zhao, Yue; Xie, Xinglong; Wu, Junqiu; Lu, Qian; Wei, Zimin

doi:10.1016/j.biortech.2017.08.010

Cited by 57 publications

(25 citation statements)

References 35 publications

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“…In this study, the observed rapid increase in temperature at the initial stage of the composting process is a common phenomenon during composting . The variations in temperature (thermophilic, mesophilic, and maturation) of both treatments across the composting period indicated OM degradation and microbial activity during the process . Rice straw biochar‐amended piles showed nonsignificant temperature patterns compared with nonbiochar amended during the composting process.…”

Section: Discussionmentioning

confidence: 67%

Biochar reduces nutrient loss and improves microbial biomass of composted cattle manure and maize straw

Bello

Deng

Sheng

et al. 2020

Biotech and App Biochem

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In this study, nutrient loss, the direct and indirect relationship between period, compost types, temperature, total nitrogen (TN), nitrate nitrogen (NO 3 −-N), ammonium nitrogen (NH 4 +-N), microbial biomass carbon (MBC), and microbial biomass nitrogen (MBN) were investigated during composting of cattle manure-maize straw mixture. This study findings revealed that biochar addition lowered NH 4 +-N but did not increase NO 3 −-N concentrations unlike no biochar piles during composting. The first-order kinetic models showed that biochar accelerated organic matter (OM) degradation and improved nitrogen mineralization, consequently reducing TN losses by 13.6% and OM losses by 12.66%. Transformation ratio of MBC/MBN, coupled with other chemical components of the entire microbial community, suggested a shift in the microbial succession and diversity during composting from the dominant bacteria and actinomycetes to fungi. The structural equation model and path coefficient revealed temperature to be the main factor mediating the evolution of MBC and MBN in composting. The physicochemical variables, phytotoxicity, and final product quality revealed that biochar incorporation to the composting feedstock is an ideal material for mitigating problems of TN and OM losses in composting and ultimately enhancing the fertility potential of the final compost product.

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Section: Discussionmentioning

confidence: 67%

Biochar reduces nutrient loss and improves microbial biomass of composted cattle manure and maize straw

Bello

Deng

Sheng

et al. 2020

Biotech and App Biochem

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show abstract

“…Meanwhile, in group C, which combined M1 with the commercial microbial inoculum, the amount of the five strains in the three stages was relatively low, possibly due to resource competition between M1 and the commercial microbial inoculum. We speculated that M1 activity began at the beginning of the mesophilic period, and degraded cellulose during the thermophilic period, which influenced the microbial community structure, and subsequently the characteristics, of the pile [55-56].…”

Section: Discussionmentioning

confidence: 99%

Effects of a novel thermophilic cellulose-degrading agent on the quality of compost and change in microbial community of garden waste

Fan

Jia

et al. 2019

Preprint

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12Knowledge about the microbial communities in composting has advanced, but definitive 13 knowledge concerning the application of actinomycetal communities in garden waste 14 composting is still lacking. In this study, we compared the effects of amending compost with 15 mixed agent M1 (five high-degradability strains) and other agents on the physicochemical 16 indices and microbial community succession. The results showed that Pile A (only applying 17 M1), exhibited a pH closer to neutral, the complete degradation of organic matter, and the 18 highest remaining levels of nitrogen, phosphorus, and potassium. The seed germination rate, 19 root length, and seed germination index values were significantly higher in piles amended 20 with M1 and/or commercially available agents than in piles without exogenous microbial 21 agents. Analyzing the microbial communities, these treatments were dominated by 22 Proteobacteria, Firmicutes, Actinobacteria, and Bacteroidetes during composting. The amount 23 of Streptomyces was negatively correlated with the carbon/nitrogen ratio and positively 24 correlated with total phosphorus and total potassium. Adding M1 increased microbial 25 diversity, and the dominant microbial communities at the end of composting were similar to 26 those found in the commercial microbial inoculum. Overall, agent M1 can shorten the 27 composting process and increase the extent of degradation. This research provides additional 28 insights into the potential function of Actinomycetes in compost ecology. 29 30 31 thermophilic cellulose-degrading bacteria 32 33 34 35 36 37 38 39 40 41 42 43 45 Waste management is one of the main issues affecting all developing nations [1]. In 46 China, with the acceleration of urbanization, the amount of green area coverage is increasing, 47 but tons of organic solid waste are produced with no means for effective decomposition, 48 representing added stress to the environment [2]. The main components of garden waste, 49 lignin and cellulose, are recalcitrant to degradation, leaving only landfilling and direct 50 burning as traditional disposal methods. Traditional landfilling and incineration methods not 51 only use land resources, but also cause other problems, such as dust particle production, soil 52 and groundwater contamination, pathogenic bacteria growth, and air pollution [3]. To lessen 53 the effects of garden waste disposal on the environment and mitigate environmental pollution, 54 biological composting employs microbial action in waste piles to transform organic solid 55 waste into stable humus and organic fertilizer. Biological composting can directly transform 56 large amounts of organic waste for compost production; however, the unreliability of the 57 quantity and biodegradability of the indigenous functional microbial community in compost 58 often leads to low composting efficiency and undesirable compost quality [4]. 59 Many studies have shown that inoculation with exogenous microorganisms is an 60 effective method for the biodegradation of organic matter a...

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“…Therefore, in this case, without the microbial activity, the composting process cannot be completed (Xie et al 2017). Inoculation is an effective way to control the composting process, which can accelerate and promote the maturity of the final compost products (Sun et al 2017). Hence, different composting systems were inoculated with various exogenous microorganisms.…”

Section: Inoculation With Cold-adapted Microorganisms and Their Enzymes Activitiesmentioning

confidence: 99%

Livestock Manure Composting in Cold Regions: Challenges and Solutions

Abdellah

2020

Agriculture (Pol'nohospodárstvo)

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This review investigates the significant challenges of the process of livestock manure composting in cold regions and assesses the critical features related to the quality of the final compost product. Recently, the composting process has grasped more attention because of environmental pollution concerns and seeks for environmentally-sound approaches for managing livestock manure. Despite recent progress in crucial areas like the microbiology of compost, further improvement is needed in composting process monitoring. Therefore, specific obstacles related to livestock manure composting in cold regions, such as the generation and preservation of temperature, and the solution of obstacles such as inoculation of coldadapted microorganisms, and the role of biochar in prolonging the thermophilic stage of composting were reviewed. Also, the challenges were adequately addressed, and promising strategies to improve composting of livestock manure under harsh conditions were proposed. Still, there is a need for more investigation to get a better understanding of the role of microbial inoculants and biochar amendment regarding the start-up of the composting process in cold regions.

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Effect of cold-adapted microbial agent inoculation on enzyme activities during composting start-up at low temperature

Cited by 57 publications

References 35 publications

Biochar reduces nutrient loss and improves microbial biomass of composted cattle manure and maize straw

Biochar reduces nutrient loss and improves microbial biomass of composted cattle manure and maize straw

Effects of a novel thermophilic cellulose-degrading agent on the quality of compost and change in microbial community of garden waste

Livestock Manure Composting in Cold Regions: Challenges and Solutions

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