A proposed aerobic granules size development scheme for aerobic granulation process

Abstract

Aerobic granulation is increasingly used in wastewater treatment due to its unique physical properties and microbial functionalities. Granule size defines the physical properties of granules based on biomass accumulation. This study aims to determine the profile of size development under two physicochemical conditions. Two identical bioreactors namely Rnp and Rp were operated under non-phototrophic and phototrophic conditions, respectively. An illustrative scheme was developed to comprehend the mechanism of size development that delineates the granular size throughout the granulation. Observations on granules' size variation have shown that activated sludge revolutionised into the form of aerobic granules through the increase of biomass concentration in bioreactors which also determined the changes of granule size. Both reactors demonstrated that size transformed in a similar trend when tested with and without illumination. Thus, different types of aerobic granules may increase in size in the same way as recommended in the aerobic granule size development scheme.

Cultivation of aerobic granular biomass in continuous flow‐intermittent decant type reactor fed with anaerobic effluent

“…This result was almost similar to the results obtained by Dahalan et al 33 where granulation started after the 19th day at a slower rate in the SBR reactor fed with synthetic wastewater (COD-1600 mg/L).…”

Growth Progression of Oxygenic Photogranules and Its Impact on Bioactivity for Aeration-Free Wastewater Treatment

“…Previous studies on other granular biotechnologies, such as aerobic granular sludge, showed that the structure of granules changes as the granules grow larger. − Changes in size and structure influence mass transfer in granules, further causing changes in ecology, physiology, as well as physicochemical properties of granules. − Hence, granule size is directly related with the characteristics and functions of granules and ultimately determines the performance of bioprocesses. Although the growth of photogranules in size is obvious in OPG reactor operation, ,, the structural as well as community changes along with size progression remain mainly unknown.…”

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

“…Dried granule was then sputter-coated with gold particles before analyzed under SEM. The mineral composition analysis was performed by scanning electron microscope coupled with energy disperse X-ray spectroscopy (SEM-EDX) (Zeiss Supra 35VP, Germany) equipped with a microprobe Kevex and image capture and management system Rontec E-500 (Rontgeanalysen, Technik) according to Benitez et al (2005) and Dahalan et al (2015). The mineral composition was quantified in atomic percentage of every component by using FEI QUANTA 200 with EDX-system.…”