Effects of organic, hydraulic and fat shocks on the performance of UASB reactors with intermittent operation

• Published in: Water science and technology Vol. 44; no. 4; pp. 49 - 56
• Main Authors: Nadais, H., Capela, I., Arroja, L., Duarte, A.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: England IWA Publishing 01.01.2001
• Subjects: Alkalinity; Anaerobic digestion; Animals; Biodegradation, Environmental; Biogas; Bioreactors; Body condition; Cattle; Dairying; Effluents; Hydraulics; Milk; Organic matter; Oxygen - metabolism; Reactors; Shock resistance; Sludge; UASB reactors; Upflow anaerobic sludge blanket reactors; Waste Disposal, Fluid - methods; Water Movements
• ISBN: 9781843394013; 1843394014
• ISSN: 0273-1223; 1996-9732
• DOI: 10.2166/wst.2001.0175

Three lab-scale UASB reactors operated at 35°C in an intermittent mode were subject to different step shocks: hydraulic, organic and feed fat content. The results show that the reactors have good resistance to the applied shocks and suggest that a feedless period is beneficial to the performance of the reactors, due to stabilisation of accumulated organic matter.