Maturity and Stability Evaluation of Composted Municipal Solid Wastes

Bazrafshan, Edris; Zarei, Amin Allah; Mostafapour, Ferdos Kord; Poormollae, Nayyereh; Mahmoodi, Saeed; Zazouli, Mohammad Ali

doi:10.17795/jhealthscope-33202

Cited by 60 publications

(39 citation statements)

References 50 publications

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“…Whereas, for winter treatments, treatments Cw 1 (1.7 × 10 7 CFU/g) and Cw 3 (2.2 × 10 7 CFU/g) registered the lowest bacterial count on last day (90th) of experiment. As expected, at maturation stage a decreasing bacterial population followed the trend Cs > Cw, attributed to the moisture loss as maturity proceeds in the curing stage [25]. Comparing all the treatments, the fungal population was higher for summer treatments in initial stage of composting, probably because of early maturation and curing of compost.…”

Section: Resultssupporting

confidence: 66%

“…For efficient composting, an optimum moisture content (40-60%), C/N ratio (25)(26)(27)(28)(29)(30), aeration rate (0.005-0.300 L air kg −1 ) and appropriate bulking agents (to facilitate better air circulation) are some important parameters. Apart from the above-mentioned parameters, the temperature attained in the compost mass significantly affects the rate of bio-oxidation in compost piles.…”

Section: Introductionmentioning

confidence: 99%

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Seasonal variation induced stability of municipal solid waste compost: an enzyme kinetics study

2019

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An investigation was carried out in laboratory to find out the effect of ambient temperature and different treatments on passive bin composting of municipal solid waste (MSW). A potent cellulase degrading inoculum (Bacillus subtilis, B. amyloliquefaciens, B. nakamurai and B. velezensis) sourced from dumpsite soil and cow dung slurry was used as addon to MSW composters. Treatments were tested during summer (26-45 °C) and winter (5-22 °C) season to profile the physiochemical, enzymatic and microbial changes during 90-day study. In addition, a kinetics model for MSW composting was derived for the rate of organic load degradation deducing the first order kinetics rate (K r), limiting velocity (K m) and dissociation constant (K d). The results of the present investigation revealed that ambient temperature hastened the degradation of organic substrates in case of MSW amended with microbes and cow dung (60 days) as indicated by the achieved maximum kinetics reaction rate, 0.0131 day −1 (R 2 = 0.993) and reduced C/N ratio (11.6%). Also, enzymatic profiles; dehydrogenase (170.1 µg TPF g −1 day −1), cellulase (96.1 µg glucose g dwt −1 h −1) and urease (539.1 μg NH 4 +-Ng dwt −1 h −1) with a high temperature profile (47-63 °C) in the finished summer compost, Cs 4 supported the results. Whereas, winter composting could not attain the desired results and produced immature compost even after 90 days. Statistical analysis (proximal cluster analysis, hierarchical cluster analysis and ANOVA) and kinetics study showed that ambient temperature in collaboration with addons significantly influenced the compost maturity.

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Section: Resultssupporting

confidence: 66%

Section: Introductionmentioning

confidence: 99%

Seasonal variation induced stability of municipal solid waste compost: an enzyme kinetics study

2019

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“…Based on a journal, the range of an ideal moisture content that must be possessed by compost medium was within 40-60% [13]. While in other study, it stated that the optimum moisture content to ensure the condition in an active phase is within range of 45% to 50% [14]. Roughly, based on the graph in Fig.…”

Section: Effect Of Moisture Content On Composting Processmentioning

confidence: 99%

Effect of pH, temperature and moisture content during composting of rice straw burning at different temperature with food waste and effective microorganisms

2018

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Rice straw is considered as one of the most important agricultural residues and represented as one of the major by-products from rice production process. Normally, rice straw that produced after harvesting season been directly burned on-farm. Conversion of rice straw into value added compost will improve the productivity of plant, reduction of pollution towards environment and reduction of local pollution due to open burning activity. The objective of this study was to evaluate the performance of composting rice straw ash (RSA) with food waste (FW) and effective microorganisms (EM) in term of the compost quality (pH, temperature, moisture content). RSA was prepared by burning the raw rice straw at three different temperature of 300°C, 400°C and 500°C for one hour. EM used during the composting process was prepared by mixing of brown sugar, ‘tempe’ and water that can be used after one week of fermentation process. There are four treatments of RSA-compost; RSA (300°C), RSA (400°C), RSA (500°C) and control (raw rice straw) with the same amount of compost medium; 1kg black soil, 0.5kg RSA, 3L EM and 1kg FW. The composting process happens for 30 days. During the composting process, all the parameters of RSA-compost obtained in a range like; pH value 8-10, temperature 20-50°C and moisture content 40-60%. The result showed that all compost quality of rice straw ash compost obtained in an acceptable range for final compost to establish.

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“…La estabilidad de las vermicompostas se relaciona con la madurez del abono (Bazrafshan et al 2016). Por ejemplo, vermicompostas inmaduras inhiben el crecimiento de las plantas, debido a que producen sustancias totóxicas que causan deciencias de nitrógeno, lo que ocasiona competencia en las raíces y los microorganismos edácos por compuestos nitrogenados (Majlessi et al 2012).…”

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Caracterización de vermicompostas y su efecto en la germinación y crecimiento de Capsicum chinense Jacquin

Santoya¹,

Álvares²,

Sánchez³

et al. 2018

Ecosist. Recur. Agropec.

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Artículo cientí co recibido: 16 de mayo de 2017 aceptado: 13 de septiembre de 2017 RESUMEN. El uso de diferentes sustratos para la elaboración de vermicompostas tienen in uencia en el desarrollo de los cultivos. El objetivo fue evaluar la productividad de la lombriz Eisenia andrei en diferentes sustratos y el efecto en la germinación y crecimiento del Capsicum chinense Jacquin. Se elaboraron vermicompostas con residuos vegetales (RV) y cascarilla de cacao (CC), y sus combinaciones con Gliricidia sepium (G). Los contenidos de ácidos húmicos (AH) y carbono de ácidos húmicos (CAH) tuvieron los mayores valores en las vermicompostas con RV, estiercol de ovino (EO) y sus combinaciones con G. El EO incrementó la biomasa y longitud de la lombriz, al combinarlo con G incremento la mortalidad de cocones y lombrices juveniles. Con el bocashí (B) y los RV se tuvieron efectos positivos en la biomasa, longitud, número de cocones y lombrices juveniles. Las vermicompostas de B, B+G+RV y RV tuvieron los mayores porcentajes de germinación. Para incrementar la biomasa de la lombriz, la población, la longitud, el número de cocones y el número de lombrices juveniles se pueden usar sustratos elaborados con RV, B y sus combinaciones. Los mayores contenidos de nutrientes en las plántulas de Capsicum chinense Jacquin se obtuvieron en la combinación de EO+G. Palabras clave: Abonos orgánicos, chile habanero, desechos orgánicos, Eisenia andrei, sustratos ABSTRACT. The use of di erent substrates for producing vermicomposts has an impact on crop development.The aim was to evaluate the productivity of the Eisenia andrei earthworm in di erent substrates and their e ect on the germination and growth of Capsicum chinense Jacquin. They were prepared with plant residues (PR) and cocoa husk (CH), and their combinations with Gliricidia sepium (G). (CC+G.) 50% + 50% Cascarilla de cacao + G. sepium + bocashí (CC+G+B) 50% + 25% + 25% Cascarilla de cacao + G. sepium + residuos vegetales (CC+G+RV) 50% + 25% + 25% Cascarilla de cacao + G. sepium + estiércol ovino (CC+G+EO) 50% + 25% + 25% G. sepium (G) 100% Las mezclas de los sustratos se colocaron en bandejas de germinación con 80 cavidades, para luego sembrar una semilla por cavidad. Para evaluar la germinación de las semillas se utilizó un diseño de bloques completos al azar con tres repeticiones por tratamiento. Las charolas se regaron todos los días para asegurar que la humedad no fuera un factor limitante. Las variables evaluadas fueron la germinación de las semillas a los 21. Para evaluar la nutrición de las plantas a los 60 d después de la siembra se determinó la biomasa fresca por gravimetría, se contabilizó el número de hojas, midió la altura de planta, la longitud de raíz y el área foliar. También se seleccionaron de forma aleatoria 10 plantas por repeticiones, para realizar los análisis de N, P y K; el contenido de N se determinó con el método Semi-

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Maturity and Stability Evaluation of Composted Municipal Solid Wastes

Cited by 60 publications

References 50 publications

Seasonal variation induced stability of municipal solid waste compost: an enzyme kinetics study

Seasonal variation induced stability of municipal solid waste compost: an enzyme kinetics study

Effect of pH, temperature and moisture content during composting of rice straw burning at different temperature with food waste and effective microorganisms

Caracterización de vermicompostas y su efecto en la germinación y crecimiento de Capsicum chinense Jacquin

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