Improvement of home composting process of food waste using different minerals

Margaritis, Markos; Psarras, K.; Panaretou, V.; Thanos, A.G.; Malamis, Dimitris; Sotiropoulos, A.

doi:10.1016/j.wasman.2017.12.009

Cited by 56 publications

(26 citation statements)

References 30 publications

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“…During the loading period, substrate moisture content was 83.91% and 83.20% in active aerated and passive aerated reactors, respectively. These high values are ascribed to the nature of substrate, and household food waste fraction from MSW may exhibit high moisture content, by up to 70-85%, owing to the nature of the most dominant food waste groups that possess high water content, namely fruits and vegetables (Margaritis et al 2018). Similar moisture content values have been outlined in other research studies (Ma et al 2016;Margaritis et al 2018).…”

Section: Moisture Contentsupporting

confidence: 74%

“…Variations in temperature of the mulch are an indication of microbial activity during composting and stability of the final organic product (Margaritis et al 2018). To have a high rate of biodegradation and a maximum microbial diversity,…”

Section: Temperaturementioning

confidence: 99%

“…This is attributed two factors, first, in active or forced aerated composting, the dominant heat removal mechanism is evaporative cooling (vaporization of water) which accounts perhaps 80-90% of the heat removal. In such systems, the contribution of conduction to heat removal may be small (Finstein et al 1983;Finstein and Hogan 1993) and the second factor being the influence of ambient temperature (Margaritis et al 2018) which was around 10 °C (experimental study was carried out during winter season) this coupled with the absence of thermal insulation to the reactors, had significant influence on the temperature developed within the reactors. However, the temperature developed in the active aerated reactor was 38 °C for 9 days and this was close to the sanitization temperature specifications prescribed by the US Environmental protection agency (USEPA 1999).…”

Section: Temperaturementioning

confidence: 99%

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Effect of active and passive aeration on composting of household biodegradable wastes: a decentralized approach

Bhave¹,

Kulkarni²

2019

Int J Recycl Org Waste Agricult

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Purpose Present work aims at studying the influence of active (using external aerator) and passive (natural) aeration on composting of household biodegradable wastes. Methods To study the suitability of these reactors to household conditions, continuous loading was carried out for a period of 60 days. Both the reactors were loaded with cooked as well as raw vegetable and fruit waste. Physico-chemical parameters such as temperature, pH, C/N ratio, moisture content, total organic content, Total Kjeldahl Nitrogen and seed-germination parameters such as Germination Index (GI) and Root Length Index (RLI) of the mulch were analyzed at different stages of the composting process. Results Results confirmed that, although both types of aeration seem to have performed well under continuous loading, the maturation period required for actively aerated reactor was 37.30% lesser than that of naturally aerated reactor. Conclusion Active aeration found to be more suitable to household conditions as odor and fly nuisance was relatively less.

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Section: Moisture Contentsupporting

confidence: 74%

Section: Temperaturementioning

confidence: 99%

Section: Temperaturementioning

confidence: 99%

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Effect of active and passive aeration on composting of household biodegradable wastes: a decentralized approach

Bhave¹,

Kulkarni²

2019

Int J Recycl Org Waste Agricult

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“…The C:N ratio for NCI and CI compost samples decreased signi cantly with time and started stabilized after 60 days in NCI treatment (12.8) and 120 days in CI treatment (15.9). However, both samples showed C:N below 12 (11.8 and 11.3, respectively), and this rate indicated a direct mineralization of organic nitrogen [51]. Control showed C:N equal to 15.9 at the end of the composting process.…”

Section: Resultsmentioning

confidence: 87%

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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“…woodchips, perlite, vermiculite and zeolite). In terms of efficient temperature evolution (>55 ℃ for 4 consecutive days), the case of zeolite and perlite provided the best results decreasing C/N ratios by 40% from the initial values among additives while they all enhanced composting process [13]. Wang et al investigated the odour emission during composting under the influence of lime addition, and struvite formation.…”

Section: Compostingmentioning

confidence: 99%

Latest research progress on food waste management: a comprehensive review

Zhu

Gao

Duan

2018

IOP Conf. Ser.: Earth Environ. Sci.

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Abstract.Since a large amount of food supplying is provided as a basic line measuring increasing residents' life standard, food waste has become progressively numeral considerable. Much attention has been drawn to this problem. This work gave an overview on latest researches about anaerobic digestion, composting, generalized management and other developments on management of food waste. Different technologies were introduced and evaluated. Further views on future research in such a field were proposed. IntroductionFood waste (FW) is composed of household food waste, food-processing waste, canteen and restaurant waste, which is one of the components of municipal solid waste [1]. The accumulation of FW cannot be neglected because of tremendous environmental and sanitary problems with it. FW amount is estimated to quickly increase from 2.78 billion tons to 4.16 billion tons in Asian countries by 2025[1]. About 1.3billion tons of food, fully one-third of all food produced is lost along the food supply chain every year [7]. While economy is still accelerated, FW grows larger at the same time. However, it is significant to see that FW management also takes an important role in the renewable energy and sustainable development for values like Biomethane potential(BMP) of FW. With rising attention being moved on this field, technologies developments for this have been made continually.Anaerobic digestion (AD) has always been the hot research trend for its relatively costeffectiveness, renewable energy production and waste treatment of high-moisture and energy-rich material [2]. During AD process, biomass and organic fraction of municipal solid waste (OFMSW) can be converted into combustible biogas (mainly methane, and other gases like hydrogen and hydrogen sulfide) [2]. Parameters such as methane yield and volatile solids reduction or so were used to assess experiment performance. In order to enhance methane generation performance, various aspects of AD were researched. Additive supplementation, operational alternations, parameters optimization and microbial actions have been discussed by researchers. In addition to AD, composting, co-pyrolysis and other FW managements pathways also have been conducted to research results. At the same time, investigations and sorting systems were made for governments to implement better decisions on FW management. This paper aims to critically give an overview on latest research progress and novel developments of FW management in 2018. Further views on future research needs in such a field were proposed simultaneously.

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Improvement of home composting process of food waste using different minerals

Cited by 56 publications

References 30 publications

Effect of active and passive aeration on composting of household biodegradable wastes: a decentralized approach

Effect of active and passive aeration on composting of household biodegradable wastes: a decentralized approach

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

Latest research progress on food waste management: a comprehensive review

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