Granulation of activated sludge using butyrate and valerate as additional carbon source and granular phosphorus removal capacity during wastewater treatment
Journal
Bioresource Technology
Pages
269-274
Date Issued
2019
Author(s)
Abstract
As an efficient and low-cost phosphorus (P) removal method from wastewater, enhanced biological phosphorus removal process always faces the insufficient carbon source issue. In this study, two identical sequencing batch reactors were used to cultivate aerobic granular sludge, in which butyrate (Rb) and valerate (Rv), two major volatile fatty acids that can be produced from anaerobic fermentation of waste biomass, were respectively applied as additional carbon source. Both reactors exhibited almost same excellent organics and total nitrogen removals during 120 days’ operation, about 95.2–95.7% and 67.9–68.0% respectively with noticeable difference in P removal. Compared to the granules in Rv (24.3 mg P/g-total solids), bigger and more stable ones with higher P removal capacity (11.5 mg P/g-volatile solids∙d) were finally achieved in Rb, containing higher P content (36.0 mg P/g-total solids) with more orthophosphate and polyphosphate accumulated. Microbial community analysis reflected more polyphosphate-accumulating organisms (Rhodocyclus-related bacteria and Actinobacteria) in the granules from Rb. © 2019 Elsevier Ltd
Subjects
Aerobic granular sludge (AGS); Butyrate; Enhanced biological phosphorus removal (EBPR); Polyphosphate-accumulating organisms (PAOs); Valerate
Other Subjects
Activated sludge process; Bacteria; Batch reactors; Biological water treatment; Carbon; Granular materials; Granulation; Nitrogen removal; Phosphorus; Volatile fatty acids; Wastewater treatment; Aerobic granular sludges; Butyrate; Enhanced biological phosphorus removal; Polyphosphate-accumulating organisms; Valerate; Chemicals removal (water treatment); butyric acid; glucose; nitrogen; organophosphorus compound; phosphate; phosphorus; polyphosphate; valeric acid; volatile agent; volatile fatty acid; butyric acid derivative; carbon; phosphorus; valeric acid derivative; activated sludge; bacterium; carbon; chemical compound; community dynamics; fermentation; microbial community; phosphorus; pollutant removal; wastewater treatment; Acidobacteria; Actinobacteria; activated sludge; aerobic granular sludge; Alphaproteobacteria; anaerobic fermentation; Article; Bacteroidetes; Betaproteobacteria; biofilm matrix; biomass; biotechnological procedures; carbon source; chemical oxygen demand; comparative study; Deltaproteobacteria; domestication; Flavobacteria; Gammaproteobacteria; granulation; high throughput sequencing; hydraulic retention time; microalga; microbial community; microbial diversity; Nitrospira; nonhuman; particle size; priority journal; Rhodocyclus; seed sludge; solids retention time; Sphingobacteria; suspended particulate matter; Verrucomicrobia; waste component removal; waste water management; metabolism; microbiology; sewage; waste water; Actinobacteria; Rhodocyclus; Biomass; Butyrates; Carbon; Nitrogen; Phosphorus; Polyphosphates; Sewage; Valerates; Waste Water
Type
journal article