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Characteristics of developed granules containing phototrophic aerobic bacteria for minimizing carbon dioxide emission

Salmiati, Salmiati and Dahalan, Farrah Aini and Mohamed Najib, Mohamed Zuhaili and Salim, Mohd. Razman and Ujang, Zaini (2015) Characteristics of developed granules containing phototrophic aerobic bacteria for minimizing carbon dioxide emission. Intertiol Biodeterioration & Biodegradation, 102 . pp. 15-23. ISSN 9648-305

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Official URL: http://dx.doi.org/10.1016/j.ibiod.2015.04.010

Abstract

Photosynthetic process compromises the most effective and natural way for carbon recycling, in which photosynthetic bacteria utilized carbon dioxide (CO2) during the wastewater treatment processes. The aim of this study was to characterize phototrophic microbial granule in order to minimize CO2. A 3-L bioreactor phototrophic Sequencing Batch Reactor (SBRP) was applied to produce phototrophic aerobic granular sludge (AGSP) and the biomass concentration increased from 3 to 14 g L−1. Such growth has resulted in a maximum settling velocity of 40 mh−1 with granule average size of approximately 2.0 mm. The high settling velocity was found to be attributed by the smooth, compact, and regular characteristics of the aerobic granules. High magnification microscopic analysis revealed that AGSP was dominated by cocci-shaped bacteria embedded within the extracellular polymeric substances (EPS). Detailed observation on the structure of the AGSP showed the presence of 30 μm of cavity to allow nutrients and gas exchanges within the aerobic granule. Scanning Electron Microscope-Energy-Dispersive X-ray (SEM-EDX) examination showed AGSP composed of different types of inorganic and organic compounds. AGSP achieved 92% of CO2 reduction, indicating that CO2 biofixation can be performed facultatively by photosynthetic bacteria in an SBR based on the nomenclature of microbial species obtained.

Item Type:Article
Uncontrolled Keywords:carbon dioxide, characterization, phototrophic aerobic granular sludge
Subjects:T Technology > TA Engineering (General). Civil engineering (General)
Divisions:Civil Engineering
ID Code:58027
Deposited By: Haliza Zainal
Deposited On:04 Dec 2016 04:07
Last Modified:07 Apr 2022 06:21

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