Effect of operational variables on biological hydrogen production from palm oil mill effluent by dark fermentation using response surface methodology

Akhbari, Azam; Zinatizadeh, Ali Akbar; Vafaeifard, Mohsen; Mohammadi, Parviz; Zainal, Bidattul Syirat; Ibrahim, Shaliza

doi:10.5004/dwt.2019.23169

Cited by 13 publications

(11 citation statements)

References 43 publications

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“…39 Figure 6 illustrates hydrogen yield as a function of μ based on Luedeking-Piret model, which α and ß represent the slope and intercept of the line for final product, respectively. From Figure 6, the relation between μ and hydrogen production has been obtained using nonlinear quadratic regression analysis (Equations [12] to [14]) for substrate concentrations of 6 to 24, respectively. As can be seen in Figure 6, the hydrogen yield for substrate concentrations of 6, 15, and 24 has been obtained with a R 2 of 0.98, 0.95, and 0.91, respectively.…”

Section: Kinetic Modelingmentioning

confidence: 99%

“…Biological hydrogen production from renewable sources propose a practical means for sustainable hydrogen (H 2 ) supply and make it as a favorable environmentally friendly source with low greenhouse gases and high efficiency 6‐8 . Among several methods for biological H 2 production, dark‐fermentation has been recognized as a feasible and effective method due to its ability to hydrogen production from different waste materials at environment pressures and temperatures, deprived of photo‐energy, simple operation conditions requirement, and controls compared to other biological methods 9‐13 . However, fermentative biohydrogen production requires more sustained accomplishments to be an efficient and economically practicable technology 3 .…”

Section: Introductionmentioning

confidence: 99%

“…[6][7][8] Among several methods for biological H 2 production, dark-fermentation has been recognized as a feasible and effective method due to its ability to hydrogen production from different waste materials at environment pressures and temperatures, deprived of photo-energy, simple operation conditions requirement, and controls compared to other biological methods. [9][10][11][12][13] However, fermentative biohydrogen production requires more sustained accomplishments to be an efficient and economically practicable technology. 3 Most of the biohydrogen production research has been carried out using synthetic substrates, which affect the cost and makes an unfeasible process for the industrial scale application.…”

Section: Introductionmentioning

confidence: 99%

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Developing single‐substrate steady‐state model for biohydrogen production in continuous anaerobic activated sludge–rotating biological contactor system: Novel insights on the process

Mohammadi

2021

Intl J of Energy Research

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Summary Kinetic‐modeling studies are a key step to attain economically practical technology in terms of efficient scheme and bioreactor scale‐up to describe the substrate utilization, biomass growth, and product formation in the biohydrogen production process. Kinetic‐modeling study of biohydrogen production from molasses using mixed culture was investigated in an anaerobic activated sludge‐rotating biological contactor. Single‐substrate with endogenous metabolism and Luedeking–Piret model was used to describe the kinetic parameters at different dilution rate (0.032‐0.167 h−1) with influent concentration of 6, 15, and 24 g COD/L. The maximum experimentally estimated value of μmax, kS, and Yx/s was found to be 0.053 h−1, 9.98 g/L, and 0.11 g/g in dilution 0.167 h−1, respectively. It can be concluded that increase in dilution rate is a suitable for microbial activities in the biological hydrogen production process. Accordingly, maximum specific growth rate and hydrogen production rate will be increased. Contrariwise, decrease in dilution rate is associated with lower biomass concentration and higher endogenous metabolism. Therefore, dilution rate is an important parameter in production of biohydrogen in this bioreactor and should be kept in an appropriate range.

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Section: Kinetic Modelingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Developing single‐substrate steady‐state model for biohydrogen production in continuous anaerobic activated sludge–rotating biological contactor system: Novel insights on the process

Mohammadi

2021

Intl J of Energy Research

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“…Numerous studies have looked into renewable energy sources which do not adversely affect the environment. [ 1,2 ] Hydrogen is touted to be the future energy carrier to replace fossil fuels due to its high calorific value and clean combustion producing only water vapor. [ 3–5 ] Hydrogen gas is produced through a number of methods, which can be categorized into three groups: 1) solar conversion (thermolysis and photolysis), 2) electrolysis (water splitting), and 3) biomass conversion (thermochemical, biochemical, and fermentation techniques).…”

Section: Introductionmentioning

confidence: 99%

Start‐Up Study on Biohydrogen from Palm Oil Mill Effluent in a Pilot‐Scale Reactor

Akhbari

Onn

Zinatizadeh

et al. 2020

CLEAN Soil Air Water

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A start-up study for biohydrogen production from palm oil mill effluent (POME) is carried out in a pilot-scale up-flow anaerobic sludge blanket fixed-film reactor (UASFF). A substrate with a chemical oxygen demand (COD) of 30 g L −1 is used, starting with molasses solution for 30 days and followed by a 10% v/v increment of POME/molasses ratio. At 100% POME, a hydrogen content of 80%, hydrogen production rate of 36 L H 2 per day, and maximum COD removal of 48.7% are achieved. Bio-kinetic coefficients of Monod, first-order, Grau second-order, and Stover-Kincannon kinetic models are calculated to describe the performance of the system. The steady-state data with 100% POME shows that Monod and Stover-Kincannon models with bio-kinetic coefficients of half-velocity constant (K s) of 6000 mg COD L −1 , microbial decay rate (K d) of 0.0015 per day, growth yield constant (Y) of 0.786 mg volatile suspended solids (VSS)/mg COD, specific biomass growth rate (max) of 0.568 per day, and substrate consumption rate of (U max) 3.98 g/L day could be considered as superior models with correlation coefficients (R 2) of 0.918 and 0.989, respectively, compared to first-order and Grau's second-order models with coefficients of K 1 1.08 per day, R 2 0.739, and K 2s 1.69 per day, a = 7.0 per day, b = 0.847.

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“…In particular, POME refers to a waste product that is harmful to be discharged into the environment prior to treatment process. Aerobic and anaerobic methods can be applied to treat POME [8]. In aerobic digester, oxygen is used during the procedure.…”

Section: Introductionmentioning

confidence: 99%

A study of palm oil mill processing and environmental assessment of palm oil mill effluent treatment

Akhbari

Kutty

Onn

et al. 2019

Environmental Engineering Research

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This work discusses the palm oil mill processing carried out at Jugra Palm Oil Mill Sdn Bhd, situated at Selangor, Malaysia with the capacity of 45-t fresh fruit bunch (FFB)/h. Typically, oil palm residues and palm oil mill effluent (POME) from FFB are generated while processing. Prior to discharge, POME should be treated to remove pollutants in the effluent. As such, the performances of anaerobic and aerobic ponds were assessed in this study to determine temperature, pH, biological oxygen demand (BOD), sludge volume index (SVI), and dissolved oxygen (DO). From the experiments, mesophilic temperature due to better process stability was applied in anaerobic ponds. The pH results displayed a fluctuating trend between lower control limit and upper control limit, and, the pH value increased from one pond to another. The final discharge BOD and SVI appeared to be lower than 100 mg/L and 10 mL/L indicating low degree of pollution and good settling ability for biomass/solid. DO was close to normal, mostly below 2 mg/L. The experimental outcomes revealed the effective treatability of POME in adherence to the standard regulation, which is the priority for environmental sustainability within this industry domain.

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Effect of operational variables on biological hydrogen production from palm oil mill effluent by dark fermentation using response surface methodology

Cited by 13 publications

References 43 publications

Developing single‐substrate steady‐state model for biohydrogen production in continuous anaerobic activated sludge–rotating biological contactor system: Novel insights on the process

Developing single‐substrate steady‐state model for biohydrogen production in continuous anaerobic activated sludge–rotating biological contactor system: Novel insights on the process

Start‐Up Study on Biohydrogen from Palm Oil Mill Effluent in a Pilot‐Scale Reactor

A study of palm oil mill processing and environmental assessment of palm oil mill effluent treatment

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