Effects of Reactor Configuration and Biomass Activity on the Performance of Upflow Static Media Anaerobic Reactors

Three upflow, static-media anaerobic reactors (USMARs), each with clean-bed volumes of 85 L but with different heights: diameter ratios were operated at 35°C, with COD loadings varying from 1 to 12 g/L·d. Height-to-diameter ratios investigated were 1.2, 4.1, and 14.3. The reactors were fed a synthet...

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Bibliographic Details
Published in:	Water environment research 1992-03, Vol.64 (2), p.141-149
Main Authors:	Chiang, Chow-Feng, Dague, Richard R.
Format:	Article
Language:	eng
Subjects:	320305 - Energy Conservation, Consumption, & Utilization- Industrial & Agricultural Processes- Industrial Waste Management 540220 - Environment, Terrestrial- Chemicals Monitoring & Transport- (1990-) ALKALI METAL COMPOUNDS ALKANES anaerobic ANAEROBIC CONDITIONS Biological and medical sciences BIOMASS Biomass production BIOREACTORS Biotechnology CHEMICAL OXYGEN DEMAND CHLORIDES CHLORINE COMPOUNDS CONFIGURATION DIMENSIONS ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION ENERGY SOURCES Engineering Engineering, Environmental Environment and pollution ENVIRONMENTAL SCIENCES Environmental Sciences & Ecology Fundamental and applied biological sciences. Psychology HALIDES HALOGEN COMPOUNDS HEIGHT HYDROCARBONS Industrial applications and implications. Economical aspects INDUSTRIAL PLANTS ISOTOPE APPLICATIONS Life Sciences & Biomedicine Limnology Lithium LITHIUM CHLORIDES LITHIUM COMPOUNDS LITHIUM HALIDES LOADING RATE Marine & Freshwater Biology METHANE Miscellaneous ORGANIC COMPOUNDS ORGANIC WASTES oxygen demand Physical Sciences Porosity reactor REMOVAL RENEWABLE ENERGY SOURCES Research Papers Science & Technology Technology TRACER TECHNIQUES upflow Volume WASTE PROCESSING PLANTS WASTES Wastewater Wastewater treatment Water pollution Water Resources WATER TREATMENT
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Summary:	Three upflow, static-media anaerobic reactors (USMARs), each with clean-bed volumes of 85 L but with different heights: diameter ratios were operated at 35°C, with COD loadings varying from 1 to 12 g/L·d. Height-to-diameter ratios investigated were 1.2, 4.1, and 14.3. The reactors were fed a synthetic substrate made from nonfat dry milk and minerals. It was hypothesized that the effect of biogas mixing on reactor performance would be greater in tall reactors than in short ones. This was found not to be the case. Based on COD removal, the tall reactor performed only slightly better than the shorter ones at loadings less than 9 g/L·d. At higher COD loadings, there was no significant difference in performance. Tracer studies using lithium chloride indicated a completely mixed flow regime at COD loadings in excess of 9 g/L·d. The acetogenic methanogenic activity of the VSS in all reactors varied between 0.1 and 0.2 L${\rm CH}_{4}/{\rm g}$VSS·d at reactor VSS concentrations higher than 1000 mg/L.
ISSN:	1061-4303 1554-7531