Algal-bacterial aerobic granule based continuous-flow reactor with effluent recirculation instead of air bubbling: Stability and energy consumption analysis
Journal
Bioresource Technology Reports
Journal Volume
7
Date Issued
2019
Author(s)
Abstract
Algal-bacterial aerobic granular sludge (AGS) based continuous-flow reactors (CFRs) were examined with effluent recirculation instead of air bubbling usually used for AGS cultivation and application. Under effluent recirculation, algal-bacterial AGS exhibited better overall performance and stability over bacterial AGS, achieving averagely dissolved organic carbon (DOC), total nitrogen (TN) and total phosphorus (TP) removals of 40%, 60%, and 15% in comparison to 32%, 35%, and 10% by the bacterial AGS, respectively. More importantly, after being switched from effluent recirculation to intermittent aeration, the algal-bacterial AGS could quickly adapt to the change in operation conditions, clearly indicated by the recovered removals of DOC from averagely 40% to 100%, TN from 60% to 98%, and TP from 15% to 64% along with the improved sludge settleability and stability after 24 day operation. Energy consumption analysis also suggested that algal-bacterial AGS-based CFR systems may have more potentials for energy saving and stable performance under proper operation strategies. © 2019 Elsevier Ltd
Subjects
Algal-bacterial granular sludge; Continuous-flow reactor; Energy consumption; Granular stability; No air bubbling
SDGs
Other Subjects
Air; Bubble formation; Energy conservation; Energy utilization; Granular materials; Organic carbon; Stability; Aerobic granular sludges; Air bubbling; Continuous flow reactors; Dissolved organic carbon; Effluent recirculation; Energy consumption analysis; Granular sludge; Intermittent aeration; Effluents; dissolved organic carbon; nitrogen; organic carbon; phosphorus; unclassified drug; aeration; aerobic bacterium; aerobic granular sludge; Article; biomass; effluent; energy conservation; energy consumption; nonhuman; nutrient loading; pollutant; priority journal; reactor operation
Type
journal article