Effect of inoculum to substrate ratio (I/S) on municipal solid waste anaerobic degradation kinetics and potential

Boulanger, Anthony; Pinet, Elisabeth; Bouix, Marielle; Bouchez, Théodore; Mansour, A.A.

doi:10.1016/j.wasman.2012.07.024

Cited by 82 publications

(45 citation statements)

References 18 publications

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“…These CH 4 yields are similar or higher than those reported for fresh waste from landfills with similar compositional characteristics [15,16] and are even close to the highest values reported for OFMSW [10]. Noticeably, the S/I = 0.5 gave the highest production of CH 4 , similar to what was found by Boulanger et al [18] for BMP tests with MSW at different S/I ratios; however, they used waste samples with lower content (< 16%) of readily degradable materials characteristic of developed countries.…”

Section: Msw Compositionsupporting

confidence: 89%

“…For the conditioning of waste samples, the biodegradable fractions (food and yard waste, paper and cardboard, non-identifiable and sanitary waste) were dried and processed in order to reduce their size for the BMP tests [18,26]. First, yard waste, paper and cardboard, nonidentifiable and sanitary materials were dried (70°C), then cut and shredded employing a forage mill (TRF 300, Trapp, Jaraguá do Sul, Brazil).…”

Section: Conditioning Of Samplesmentioning

confidence: 99%

“…The BMP tests were performed by the manometric method using 500-mL amber coloured glass bottles that were hermetically sealed with a metallic cap and a septum, as shown in Fig. 1 [18,29]. The working volume in each test was 400 mL, which left 100 mL for the accumulation of biogas.…”

Section: Bmp Testsmentioning

confidence: 99%

“…BMP studies for landfills had been used to estimate the CH 4 production potential and evaluate the biological stability of the biodegradable fraction of MSW by adjusting the test parameters to simulate conditions similar to those of landfills [15,16]. Although the S/I ratio is one of the main factors in BMP tests [17], its influence on the quality of the results for landfill MSW is rarely assessed [18]. Also, most of the BMP studies with landfill MSW reported in the literature have been carried out in developed countries [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

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Methane potential and degradation kinetics of fresh and excavated municipal solid waste from a tropical landfill in Colombia

Sandoval-Cobo

Casallas-Ojeda

Carabalí-Orejuela

et al. 2020

Sustain Environ Res

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The optimization of degradation processes and the management of leachate and biogas produced in landfills are key aspects for the establishment of more sustainable municipal solid waste (MSW) disposal in developing countries. In this study, biochemical methane potential (BMP) tests were used to evaluate CH 4 production potential and degradation kinetics of fresh waste (FW) and five-year aged excavated waste (EW) samples from a tropical controlled landfill with compositional characteristics of developing countries. BMP tests with reconstituted samples of the biodegradable fraction of both MSW types were performed at three substrate/inoculum (S/I) ratios (0.3, 0.5 and 1.0 g VS substrate g − 1 VS inoculum), and CH 4 generation parameters were determined using the first-order and modified Gompertz kinetic models. After 30-d, the best BMP results were reached at S/I ratios of 0.5 and 1.0, with cumulative CH 4 productions of 528 and 433 mL CH 4 g − 1 VS for FW, respectively; and 151 and 135 mL CH 4 g − 1 VS for EW, respectively. The first-order kinetic model provided a good fit to BMP results for FW, whereas the modified Gompertz model showed a better adjustment to the BMP data for EW. Calculated first-order CH 4 generation rates for FW and EW were in the range 0.19-0.36 and 0.23-0.25 d − 1 , respectively. These results evidence the high biodegradability and CH 4 potential of FW disposed of in a tropical landfill in Colombia and the reduced BMP of EW despite a relatively short period after disposal under conventional landfill operation conditions.

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Section: Msw Compositionsupporting

confidence: 89%

Section: Conditioning Of Samplesmentioning

confidence: 99%

Section: Bmp Testsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Methane potential and degradation kinetics of fresh and excavated municipal solid waste from a tropical landfill in Colombia

Sandoval-Cobo

Casallas-Ojeda

Carabalí-Orejuela

et al. 2020

Sustain Environ Res

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“…Each BMP test contained 80 mg of inoculum and 20 mg of WAS pretreated with FNA (0, 2.49, 3.55 and 4.62 mg N-HNO 2 /L; see Table 1) according to Zahedi et al [19]. Ratios inoculum/ Substrate (I/S) between 2 and 4 are required to ensure the proper performance of BMP tests [20,21]. A control test (WAS without nitrite and pH control) was also conducted.…”

Section: Biochemical Methane Potential (Bmp) Testsmentioning

confidence: 99%

Enhancing sludge biodegradability through free nitrous acid pre-treatment at low exposure time

Zahedi¹,

Icaran

Yuan

et al. 2017

Chemical Engineering Journal

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Effect of the co‐digestion of agricultural lignocellulosic residues with manure from South American camelids

Meneses-Quelal

Gaibor‐Chávez

Niño

2021

Biofuels Bioprod Bioref

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This study aims to evaluate the effects of the co‐digestion of agricultural residues with manure from camelids from the Andean zone. Different combinations of llama manure (LM) and vicuñas (VM) were made with amaranth (AS), quinoa (QS), and wheat (WS) residues. They were fermented using sewage sludge as inoculum. The co‐digestion was evaluated under mesophilic conditions for 40 days. The ratios of volatile substances of substrate / co‐substrate evaluated were 0:100; 25:75; 50:50, 75:25, and 100:0. Two substrate / inoculum ratios (SIR 1:1 and SIR1:2) were also evaluated. The results indicate that the maximum methane accumulation rate is obtained in SIR 1:1 for a VM‐AS ratio (25:75) with 540 mL/g volatile solid (VS). In general, the results did not increase with the increase in inoculum; rather, the tendency to improve methane yield is associated with an increase in the amount of agricultural residues, mainly AS. Regarding the kinetic modeling, the transfer model is the one that best adjusted the predicted values to those observed with an r2 between 0.991 and 0.999, and an RMSE value between 2.06 and 13.62 mL/g (volatile solid) VS. Finally, all the trials presented synergistic effects in their co‐digestion except the digesters formed by LM‐AS, LM‐QS and LM‐WS of SIR 1:2. These presented antagonistic effects in which the addition of the co‐substrate generated competition with the substrates, reducing methane production. © 2021 Society of Chemical Industry and John Wiley & Sons, Ltd

show abstract

Effect of inoculum to substrate ratio (I/S) on municipal solid waste anaerobic degradation kinetics and potential

Cited by 82 publications

References 18 publications

Methane potential and degradation kinetics of fresh and excavated municipal solid waste from a tropical landfill in Colombia

Methane potential and degradation kinetics of fresh and excavated municipal solid waste from a tropical landfill in Colombia

Enhancing sludge biodegradability through free nitrous acid pre-treatment at low exposure time

Effect of the co‐digestion of agricultural lignocellulosic residues with manure from South American camelids

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