Physico-chemical and biological characteristics of compost from decentralised composting programmes

Vázquez, M.A.; Sen, Robin; Soto, M.

doi:10.1016/j.biortech.2015.09.034

Cited by 25 publications

(9 citation statements)

References 29 publications

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“…The process is maintained in the thermophilic temperature range, the values recorded for C/N are among the values allowed by Solid Waste Management (SWM) rules 16 , in addition, they are consistent with results obtained in other studies, evidencing that the loss of nitrogen in ammonium form during composting, indicating that mature compost was obtained with a high nitrogen content as nutrient and a high fertilizing value 17,18,19 .…”

Section: Evaluation Of the Quality Of The Compost Obtainedsupporting

confidence: 87%

Aerobic and Anaerobic Biodigestion Assessment in the Production of Compost, Biol and Biogas from Restaurant Waste with Cattle Manure as Inoculum

2018

IJCTR

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The purpose of this research was to evaluate the production of compost, biol and biogas from organic solid waste using cattle manure as inoculum through aerobic and anaerobic biodigestion; two prototypes of biodigester were designed on a pilot scale. The monitored variables were pH and moisture in order to obtain good quality compost. Solid organic waste from a sample of restaurants in the city of Cartagena de Indias was used; cattle manure was also used for its production. The growth of mesophilic bacteria, fecal coliforms and fungi present in different stages of composting was monitored, using Brilla Broth and Mac Conkey and Brilla agar. The Most Probable Number method was used for counting microorganisms, and the successful collection of biological by-products and biogas was performed. The obtaining and quality of the compost from the experiments depended substantially on the use of inoculum, as evidenced by the aerobic/anaerobic experiments with inoculum, from which a greater quantity of by-products was obtained and complied with the optimum ranges for the chemical, physical and microbiological parameters for organic fertilizers.

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Section: Evaluation Of the Quality Of The Compost Obtainedsupporting

confidence: 87%

Aerobic and Anaerobic Biodigestion Assessment in the Production of Compost, Biol and Biogas from Restaurant Waste with Cattle Manure as Inoculum

2018

IJCTR

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“…There was a decrease of electrical conductivity values until the end of the experiment to the following values: 368 µS/cm for S1, 299 µS/cm for S2, and 362 µS/cm for S3 (Figure 3b). All samples had anEC under 1000 µS/cm due to the fruit and vegetable waste according to [28]. Figure 3d illustrates the probability plot for EC of the three samples (the EC mean values were 617.4 µS/cm for S1, 654.3 µS/cm for S2, and 612.9 µS/cm for S3).…”

Section: Resultsmentioning

confidence: 99%

Monitoring of Fruit and Vegetable Waste Composting Process: Relationship between Microorganisms and Physico-Chemical Parameters

Ghinea

Leahu

2020

Processes

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The aim of this study was to investigate and evaluate the composting potential of fruit and vegetable waste with sawdust in different combinations and to establish the relationship between microorganisms and physico-chemical parameters. Three samples were made with the C/N ratios of 50 (sample 1), 45 (sample 2), and 30 (sample 3) by adding fruit waste (apple, banana, orange, and kiwi peels) and vegetable waste (cabbage leaves, potato and carrot peels). The total amount of fruit and vegetable waste was approximately 2 kg in each sample to which different quantities of sawdust were added (1.23, 0.14, and 0.203 kg) in order to obtain the C/N ratios proposed and to limit the odor. Composting process was monitored over 70 days, while physico-chemical and microbiological analyses were performed. Results showed that in the first week pH is acidic and electrical conductivity values are high for all three samples, and then the pH values increase during the composting process, while electrical conductivity values decrease. The nitrogen content is low in all samples and will decrease during the first five weeks of the composting process, then begin to increase slightly. Cr, Cu, Ni, and Zn values in the all three compost samples are below threshold values. During the composing process the microbial communities are constantly changing. The compost was successfully obtained and meets the requirement standards for agricultural use. It can be concluded that there is statistically significant association between the microorganisms and physico-chemical indicators.

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“…In order to facilitate interpretation, relative heavy metal (HM) values are defined as the ratio of the metal concentration in the compost sample to the Class A regulation limit [32].…”

Section: Sampling and Analysismentioning

confidence: 99%

Development of Technologies for Local Composting of Food Waste from Universities

Vázquez

Plana²,

Pérez

et al. 2020

IJERPH

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The amount of biowaste generated by university canteens (BWUC) in the faculties of the University of A Coruña (UDC) varies between 6 and 100 kg/day. In addition, the gardening services of the campus generate even higher amounts of garden waste (GrW), including pruning, which, once crushed, serves as bulking material for composting the biowaste from the canteens. Decentralized composting has been chosen with the aim of producing high quality organic fertilizers for university urban gardens while reducing the environmental burdens of both waste management and agricultural practice. Small static home composters of 340 L (SHC) for smaller amounts of generation (up to 20 kg BWUC/day) were used, while, for faculties of higher generation (up to 40 kg BWUC/day on average), the first composting stage was carried out in a closed and dynamic composter (DC). The dynamic composter was designed and built specifically for this project and its features were improved and optimized throughout the study. The pilot project was carried out in two centers of the UDC, which are known as the Philology Faculty (PF) and the School of Architecture (SA). All the organic waste generated by the canteens of these two colleges from January 2011 to July 2011 (approximately 3000 kg) was treated. Composting in SHC included a thermophilic phase that extended one month beyond the loading period for which thermophilic temperatures were also recorded. The use of the DC as the first stage in combination with static composters (SC) for the maturation stage reduced the overall thermophilic phase to 6–8 weeks. The complete maturation (Rottegrade class IV-V) was achieved after about four months in SHC and after two months when using the combined DC-SC system, if the right conditions of moisture were maintained. The chemical quality of the compost produced was compatible with Class A of Spanish legislation (equivalent to organic farmer quality) and the C/N ratio ranged from 9 to 15 depending on the relation BWUC:GrW.

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Physico-chemical and biological characteristics of compost from decentralised composting programmes

Cited by 25 publications

References 29 publications

Aerobic and Anaerobic Biodigestion Assessment in the Production of Compost, Biol and Biogas from Restaurant Waste with Cattle Manure as Inoculum

Aerobic and Anaerobic Biodigestion Assessment in the Production of Compost, Biol and Biogas from Restaurant Waste with Cattle Manure as Inoculum

Monitoring of Fruit and Vegetable Waste Composting Process: Relationship between Microorganisms and Physico-Chemical Parameters

Development of Technologies for Local Composting of Food Waste from Universities

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