Kinetics of biogas production and chemical oxygen demand removal from compost leachate in an anaerobic migrating blanket reactor

Ebrahimi, Aliasghar; Hashemi, H Jahani; Eslami, Hadi; Fallahzadeh, Reza Ali; Khosravi, Rasoul; Askari, Roohollah; Ghahramani, Esmail

doi:10.1016/j.jenvman.2017.10.038

Cited by 48 publications

(15 citation statements)

References 18 publications

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“…After a period of 40 days, the volatile solids content in the reactor was stably around 10 g/L and it was reached a methane production yield (MPY) of about 0.24 L CH 4 /g CODremoved , sign of the completion of biomass acclimatation and the occurrence of an efficient anaerobic digestion. The extension of the period required for the digester start-up is similar to those that were performed in anaerobic migrating blanket reactors [32] and lower than that observed in hybrid anaerobic reactors [12].…”

Section: Start-up Phasesupporting

confidence: 63%

“…However, few studies have been focused on the treatment of compost leachate by means of anaerobic reactors. Moreover, the researches conducted so far mainly refer to the use of complex reactors, such as anaerobic migrating blanket reactor (AMBR), anaerobic baffled reactor (ABR), expanded granular sludge bed bioreactor (EGSB), and hybrid anaerobic reactor (HAR) [10,12,[32][33][34][35]. In particular, the anaerobic migrating blanket reactors were also used in the removal of hazardous compounds [35].…”

Section: Introductionmentioning

confidence: 99%

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Biogas Generation through Anaerobic Digestion of Compost Leachate in Semi-Continuous Completely Stirred Tank Reactors

et al. 2019

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The composting process of organic fraction of municipal solid waste, besides to the residual compost, generates a wastewater that is characterized by a high organic load. The application of anaerobic processes represents an advantageous solution for the treatment and valorization of this type of wastewater. Nevertheless, few works have been focused on the anaerobic digestion of compost leachate. To overcome this dearth, in the present paper an extensive experimental investigation was carried out to develop and analyse the anaerobic treatment of young leachate in completely stirred tank reactors (CSTR). Initially, it was defined a suitable leachate pretreatment to correct its acidic characteristics that is potentially able to inhibit methanogenic biomass activity. The pretreated leachate was fed to the digester over the start-up phase that was completed in about 40 days. During the operational period, the organic load rate (OLR) changed between 4.25 kgCOD/m3d and 38.5 kgCOD/m3d. The chemical oxygen demand (COD) abatement was higher than 90% for OLR values up to 14.5 kgCOD/m3d and around to 80% for applied loads equal to 24.5 kgCOD/m3d. At this OLR, it was reached the maximum daily biogas production of about 9.3 Lbiogas/(Lreactord). The CH4 fraction was between 70%–78% and the methane production yield in the range 0.34–0.38 LCH4/gCODremoved. The deterioration of biogas production started for OLR values that were over the threshold of 24.5 kgCOD/m3d when a volatile fatty acids (VFA) accumulation occurred and the pH dropped below 6.5. The maximum ratio between VFA and alkalinity (ALK) tolerable in the CSTR was identified to be 0.5 gCH3COOH/gCaCO3. Through an economic analysis, it was proven that the digestion of compost leachate could ensure significant economic profits. Furthermore, the produced digestate had characteristics that were compatible for agricultural applications.

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Section: Start-up Phasesupporting

confidence: 63%

Section: Introductionmentioning

confidence: 99%

Biogas Generation through Anaerobic Digestion of Compost Leachate in Semi-Continuous Completely Stirred Tank Reactors

et al. 2019

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“…With excessive increase in t h e concentration, the removal efficiency decreased, which might be attributed to the extra concentration of volatile fatty acids in the reactor Second compartment and (c). Third compartment [19]. The total removal in the second compartment was lower than that in the first, due to the lesser quantity of organic degradable materials in the waste water.…”

Section: Performance Of Compartmentsmentioning

confidence: 95%

Kinetic Study of Anaerobic Digestion of Ketchup Industry Wastewater in a Three-stages Anaerobic Baffled Reactor (ABR)

Sumantri

Budiyono

Purwanto

2019

Bull. Chem. React. Eng. Catal.

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The anaerobic digestion of the ketchup industry's wastewater in a three-stage 60 L capacity baffled reactor has been studied. The effect of concentrations of the initial chemical oxygen demand (2727.3-12086.7 mg/L), on the ABR performance and kinetic models were investigated. The ABR performance was evaluated by measuring the concentrations of each compartment of the COD, calculating its percentage removal, and the acquired data were fitted to the kinetic models. From the initial input, the three-stage ABR successfully removed 90 % of COD, for the initial COD until the concentration was 5324.6 mg/L it achieved stationary phase with HRT 5-10 days, while for initial COD until the concentration was 12086.7 mg/L is attained, the stationary was at 10 days. The kinetic model of second order Grau was suitable for the data, with k2 of 0.6061 d -1 and R 2 of 0.9955.

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“…The model developed by Van der Meer and Heertjes has been widely used to determine methane production rates in anaerobic systems. 31 In this model, the production of methane is associated with the Van der Meer-Heertjes kinetic constant (K sg ), the inuent ow and the COD removal efficiency, as shown in eqn (6):…”

Section: Kinetic Modelsmentioning

confidence: 99%

Performance, process kinetics and functional microbial community of biocatalyzed electrolysis-assisted anaerobic baffled reactor treating carbohydrate-containing wastewater

Wang

Zhu

2018

RSC Adv.

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Kinetics of biogas production and chemical oxygen demand removal from compost leachate in an anaerobic migrating blanket reactor

Cited by 48 publications

References 18 publications

Biogas Generation through Anaerobic Digestion of Compost Leachate in Semi-Continuous Completely Stirred Tank Reactors

Biogas Generation through Anaerobic Digestion of Compost Leachate in Semi-Continuous Completely Stirred Tank Reactors

Kinetic Study of Anaerobic Digestion of Ketchup Industry Wastewater in a Three-stages Anaerobic Baffled Reactor (ABR)

Performance, process kinetics and functional microbial community of biocatalyzed electrolysis-assisted anaerobic baffled reactor treating carbohydrate-containing wastewater

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