Start‐Up Study on Biohydrogen from Palm Oil Mill Effluent in a Pilot‐Scale Reactor. Issue 7 (25th June 2020)

• Record Type: Journal Article
• Authors: Akhbari, Azam; Chuen, Onn Chiu; Zinatizadeh, Ali Akbar; Ibrahim, Shaliza
• Is Part Of: Clean. Volume 48:Issue 7/8(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-06-25
• Subjects: biohydrogen -- chemical oxygen demand -- dark fermentation -- kinetic models -- palm oil mill effluent; Water quality -- Periodicals; Water -- Pollution -- Periodicals; Pollution -- Periodicals; Bioremediation -- Periodicals; Sewage -- Periodicals; Water chemistry -- Periodicals; 333.7205
• DOI: 10.1002/clen.202000192
• Languages: English
• ISSNs: 1863-0650

Abstract

Abstract: 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 H2 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 ( μ 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. Abstract : Hydrogen production through a microbial fermentation process from organic wastes is a promising alternative source of energy. This study investigates the performance of a pilot‐scale up‐flow anaerobic sludge blanket fixed‐film bioreactor in biohydrogen production and studies the different kinetic models to predict the system performance in treating palm oil mill effluent.