Improving the quality of municipal organic waste compost

Tognetti, Celia; Mazzarino, Marı́a Julia; Laos, F.

doi:10.1016/j.biortech.2006.04.025

Cited by 161 publications

(121 citation statements)

References 28 publications

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“…High losses of nitrogen as ammonia volatilization were a commonplace in the literature on composting [42,43]. In the present work, however, nitrogen losses were limited in the piles of corn stalk, moreover, nitrogen content increased throughout the process.…”

Section: Discussionmentioning

confidence: 50%

Comparison and Evaluation of Co-composting Corn Stalk or Rice Husk with Swine Waste in China

Gao

Zhou

Wang

et al. 2015

Waste Biomass Valor

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An experimental composting system was employed to study the effect of different proportions of corn stalk, rice husk and swine waste on composting efficiency and final compost quality. Three dry mass ratios were designed with biological agent addition as blank contrast. After 84 days of a static aerobic composting process, full-scale comparison was investigated in maturity, organic nutrient and sanitarian properties. The results showed that the treatment of corn stalk co-composting with swine waste at 1:1.5 ratio with the addition of a biological agent was the first to achieve maturity and had a higher level of organic fertiliser quality, and hygienic indicators of the compost product were satisfied within the relevant standards for harm. Meanwhile, the effect of the biological agent on acceleration of degradation was verified in corn stalk composting. This study found rice husk compost did not reach ideal high temperature. The maturity effect of the final product was relatively poor. Except the treatment of rice husk mixing swine manure at 1:2 ratio with biological agent, other treatments of rice husk had lower and lesseffective products, no positive effect was observed in the rice husk compost. At the end of this paper some suggestions were given to develop new approaches for rice husk utilisation and reduce the cost of corn stalk co-composting.

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Section: Discussionmentioning

confidence: 50%

Comparison and Evaluation of Co-composting Corn Stalk or Rice Husk with Swine Waste in China

Gao

Zhou

Wang

et al. 2015

Waste Biomass Valor

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“…Table 3 presents the decreases in the DM and OM values that were calculated for all composting reactors. Decreasing DM and OM contents during the composting process have been widely reported and result from the mineralization of the OM by microorganisms (Banegas et al, 2007;Rihani et al, 2010;Tognetti et al, 2006). The DM and OM contents decreased in all composting reactors in this study.…”

Section: Temperaturesupporting

confidence: 55%

Composting of wastewater treatment sludge with different bulking agents

Uçaroğlu

Alkan

2015

Journal of the Air & Waste Management Association

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The main objectives of this study were to investigate the compostability of wastewater treatment sludge (WTS) containing different bulking agents (BAs) and to determine the most efficient BA. Four different compost trials consisting of mixtures of wheat straw (WS), plane leaf (PL), corncob (CC) and sunflower stalk (SS) with WTS were performed in laboratory reactors. In all experiments, a mixture of 60% WTS and 40% BA (wet basis) was used. The temperature, dry matter (DM), organic matter (OM), pH, electrical conductivity (EC) and C/N ratio were monitored during the composting process. Evaluation of the operational parameters showed that the highest organic matter degradation (i.e. 37.6%), loss of dry matter (i.e. 29.6%) and temperature (i.e. 64°C) were achieved for the WTS-CC mixtures. Results also showed that the WTS-SS mixture was also successful in terms of these operational parameters. Use of bulking agents for the treatment of wastewater treatment sludge in composting process is an important issue with regards to process efficiency, economy and disposal of agricultural waste. Corncob and sunflower stalk that were previously not used for the composting of WTS from food industry were shown to be highly successful BA materials in this study.Implications: The compostability of wastewater treatment sludge from the food industry with different bulking agents was studied. Wheat straw, plane leaf, corncob, and sunflower stalk were used as bulking agents. The required microbial stabilization and degree of mineralization were achieved with corncobs and sunflower stalks. PAPER HISTORY

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“…Vermicomposting, on the other hand, is emerging as the most appropriate alternative to conventional aerobic composting (Yadav et al 2010) and it involves the bio-oxidation and stabilization of organic material by the joint action of earthworms and microorganisms ). More recently, combining thermophilic composting and vermicomposting has been considered as a way of achieving stabilized substrates (Tognetti et al 2007). Thermophilic composting results in sanitization of wastes and elimination of toxic compounds while the subsequent vermicomposting reduces particle size and increases nutrient availability (Mupondi et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Comparative effectiveness of different composting methods on the stabilization, maturation and sanitization of municipal organic solid wastes and dried faecal sludge mixtures

et al. 2017

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Background:Composting is one of the integrated waste management strategies used for the recycling of organic wastes into a useful product. Composting methods vary in duration of decomposition and potency of stability, maturity and sanitation. This study was aimed to investigate the comparative effectiveness of four different methods of composting viz. windrow composting (WC), Vermicomposting (VC), pit composting (PC) and combined windrow and vermicomposting (WVC) on the stabilization, maturation and sanitization of mixtures of municipal solid organic waste and dried faecal sludge. Methods:The composting treatments were arranged in a completely randomized block design with three replications. The changes in physico-chemical and biological characteristics of the compost were examined at 20 days interval for 100 days using standard laboratory procedures. The analysis of variance was performed using SAS software and the significant differences were determined using Fisher's LSD test at P ≤ 0.05 level.Results: The evolution of composting temperature, pH, EC, NHratio, OC, C:N ratio and total volatile solids varied significantly among the composting methods and with composting time. The evolution of total nitrogen and germination index also varied significantly (P ≤ 0.001) with time, but their variation among the composting methods was not significant (P > 0.05). Except for PC, all other methods of composting satisfied all the indices for stability/maturity of compost at the 60th day of sampling; whereas PC achieved the critical limit values for most of the indices at the 80th day. A highly significant differences (P ≤ 0.001) were noted among the composting methods with regard to their effectiveness in eliminating pathogens (faecal coliforms and helminth eggs). The WVC method was most efficient in eliminating the pathogens complying with WHO's standard. Conclusion:Turned windrow composting and composting involving earthworms hastened the biodegradation process of organic wastes and result in the production of stable compost earlier than the traditional pit method of composting. The WVC method is most efficient in keeping the pathogens below the threshold level. Thus, elimination of pathogens from composts being a critical consideration, this study would recommend this method for composting organic wastes involving human excreta.© The Author(s) 2017. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Improving the quality of municipal organic waste compost

Cited by 161 publications

References 28 publications

Comparison and Evaluation of Co-composting Corn Stalk or Rice Husk with Swine Waste in China

Comparison and Evaluation of Co-composting Corn Stalk or Rice Husk with Swine Waste in China

Composting of wastewater treatment sludge with different bulking agents

Comparative effectiveness of different composting methods on the stabilization, maturation and sanitization of municipal organic solid wastes and dried faecal sludge mixtures

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