Chapter 3 Microbiology of the composting process

Insam, Heribert; Bertoldi, M.

doi:10.1016/s1478-7482(07)80006-6

Cited by 208 publications

(208 citation statements)

References 29 publications

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“…This process occurs in two distinct phases; in the first, active degradation takes place, and in the second, maturation (humification) of the organic material occurs. The process time varies according the environment and the type and particle size of the material to be composted (Insam;Bertoldi, 2007;Sun, 2015).…”

Section: Introductionmentioning

confidence: 99%

Microbial additives in the composting process

et al. 2017

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Composting is the process of natural degradation of organic matter carried out by environmental microorganisms whose metabolic activities cause the mineralization and partial humification of substances in the pile. This compost can be beneficially applied to the soil as organic fertilizer in horticulture and agriculture. The number of studies involving microbial inoculants has been growing, and they aim to improve processes such as composting. However, the behavior of these inoculants and other microorganisms during the composting process have not yet been described. In this context, this work aimed to investigate the effects of using a microbial inoculum that can improve the composting process and to follow the bacterial population dynamics throughout the process using the high-resolution melt (HRM) technique. To do so, we analysed four compost piles inoculated with Bacillus cereus, Bacillus megaterium, B. cereus + B. megaterium and a control with no inoculum. The analyses were carried out using samples collected at different stages of the process (5th to 110th days). The results showed that the bacterial inocula influenced the process of composting, altering the breakdown of cellulose and hemicelluloses and causing alterations to the temperature and nitrogen levels throughout the composting process. The use of a universal primer (rDNA 16S) allowed to follow the microbial succession during the process. However, the design of a specific primer is necessary to follow the inoculum throughout the composting process with more accuracy.Index terms: High Resolution Melt (HRM); bacteria; microbial ecology. RESUMOA compostagem é um processo de degradação natural da matéria orgânica realizado por microrganismos presentes no ambiente, levando a mineralização e humificação parcial das substâncias presentes na pilha, esse composto formado pode ser beneficamente aplicado ao solo como fertilizante orgânico na horticultura e agricultura. O número de estudos envolvendo inoculantes microbianos é crescente, os quais tem por objetivo a otimização de processos de compostagem. Contudo, o comportamento desses inoculantes e da microbiota ao longo do processo não tem sido caracterizado. Nesse contexto, este trabalho foi realizado com o objetivo de avaliar o efeito da utilização de um inóculo bacteriano que promova melhorias no processo de compostagem, bem como o de acompanhar a dinâmica populacional bacteriana ao longo de todo o processo através da técnica de High Resolution Melt (HRM). Para isso foram analisados quatro pilhas de compostagem inoculadas com Bacillus cereus, Bacillus megaterium, B. cereus + B. megaterium e o controle sem adição de inóculo. Foram realizadas análises químicas e moleculares (HRM) das amostras coletadas em diferentes períodos da compostagem (5º ao 110º dias). Os resultados mostraram que os inóculos bacterianos influenciaram no processo de compostagem com alteração na degradação de celulose, hemicelulose bem como alteração da temperatura e níveis de nitrogênio ao longo da compostagem. A utilização de ...

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Section: Introductionmentioning

confidence: 99%

Microbial additives in the composting process

et al. 2017

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“…Compost is an aerobically decomposed organic material derived from plants and animal sources by mesophilic and thermophilic microorganisms (Martens, 2000 andInsam &de Bertoldi, 2007). Vermicompost is product of organic S USTAINABLE agricultural development need to provide alternatives of mineral fertilizers to produce safe food for humans, maintain of soil fertility and preserve of environment from pollution.…”

Section: Introductionmentioning

confidence: 99%

Application of Compost and Vermicompost as Substitutes for Mineral Fertilizers to Produce Green Beans

2017

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“…It is known that the OM content should be decreased during composting process. The loss of OM content during composting was due to its conversion into CO 2 , H 2 O and energy in one part while the remaining part is converted into stable organic compounds [25] [27]. There were significant differences among substrates on macronutrient contents depending on the nutrient element.…”

Section: Physico-chemical Properties C/n Ratio Organic Matter (Om)mentioning

confidence: 99%

Physico-Chemical Properties of Compost Based Waste-Recycling of Grape Fruit as Nursery Growing Medium

El-Mahrouk¹,

Dewir²

2016

AJPS

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The present study reports the physico-chemical properties of four compost based squeezed grape fruit wastes (SGFW) consisting of 60% SGFW + 40% chicken manure (including sawdust) (CMS) (v/v), 80% SGFW + 20% bean hay (BH) (v/v), 80% SGFW + 20% chicken manure (including wheat hay) (CMH) (v/v) and 100% SGFW. Results showed that 100% SGFW compost had a suitable pH and EC with 7.82 and 1.68 dSm −1 , respectively. Also, 80% SGFW + 20% BH compost was very rich in organic matter similar to coco peat, but 80%SGFW + 20% CMH compost had the lowest C/N ratio (5.2). The N, P and K concentrations in SGFW composts were higher than the coco peat or vermiculite. The soluble cations (Ca 2+ , Mg 2+ , K + ) and anions (

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Chapter 3 Microbiology of the composting process

Cited by 208 publications

References 29 publications

Microbial additives in the composting process

Microbial additives in the composting process

Application of Compost and Vermicompost as Substitutes for Mineral Fertilizers to Produce Green Beans

Physico-Chemical Properties of Compost Based Waste-Recycling of Grape Fruit as Nursery Growing Medium

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