caa a22 4500 465823858 CHVBK 20180323112143.0 cr unu---uuuuu 170327e19900901xx s 000 0 eng 10.1007/BF00604946 doi (NATIONALLICENCE)springer-10.1007/BF00604946 Venturi aeration and thermophilic aerobic sewage sludge digestion in small-scale reactors [Elektronische Daten] [Peter Burt, Michel Littlewood, Simon Morgan, Brian Dancer, John Fry] Summary: The aeration performance of two venturi aeration reactors (operating volumes 381 and 251) was studied for an air-water system. It was found that the mass transfer coefficient (k la) could be described in terms of the superficial gas velocity (V s) alone by the simple expressionk La=aV infb supS with constantsa=0.313,b=0.579 for the 38-1 reactor anda=0.214,b=0.534 for the 25-1 reactor. A similar relationship was obeyed when the 38-1 reactor was aerated with a diffuser tile (a=17.0,b=1.52). A linear relationship betweenk La and gas hold-up was observed for the 38-1 reactor with both venturi and diffuser aeration. The 25-1 reactor was used successfully for the thermophilic aerobic digestion of sewage sludge. A mean sludge temperature rise of 30°C was observed. Chemical oxygen demand, pH, and total solids content of the digested sludge differed significantly from the feed sludge and were similar to values obtained for full-scale thermophilic aerobic digestion. No significant differences between inorganic solids content, dissolved oxygen concentration, or redox potential were observed between feed and digested sludge. Springer-Verlag, 1990 Burt Peter School of Pure and Applied Biology, University of Wales College of Cardiff, PO Box 915, CF1 3TL, Cardiff, UK aut Littlewood Michel Electricity Council Research Centre, CF1 3TL, Capenhurst, Chester, UK aut Morgan Simon Electricity Council Research Centre, CF1 3TL, Capenhurst, Chester, UK aut Dancer Brian School of Pure and Applied Biology, University of Wales College of Cardiff, PO Box 915, CF1 3TL, Cardiff, UK aut Fry John School of Pure and Applied Biology, University of Wales College of Cardiff, PO Box 915, CF1 3TL, Cardiff, UK aut Applied Microbiology and Biotechnology Springer-Verlag 33/6(1990-09-01), 721-724 0175-7598 33:6<721 1990 33 253 https://doi.org/10.1007/BF00604946 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00604946 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Burt Peter School of Pure and Applied Biology, University of Wales College of Cardiff, PO Box 915, CF1 3TL, Cardiff, UK aut NATIONALLICENCE 700 1- Littlewood Michel Electricity Council Research Centre, CF1 3TL, Capenhurst, Chester, UK aut NATIONALLICENCE 700 1- Morgan Simon Electricity Council Research Centre, CF1 3TL, Capenhurst, Chester, UK aut NATIONALLICENCE 700 1- Dancer Brian School of Pure and Applied Biology, University of Wales College of Cardiff, PO Box 915, CF1 3TL, Cardiff, UK aut NATIONALLICENCE 700 1- Fry John School of Pure and Applied Biology, University of Wales College of Cardiff, PO Box 915, CF1 3TL, Cardiff, UK aut NATIONALLICENCE 773 0- Applied Microbiology and Biotechnology Springer-Verlag 33/6(1990-09-01), 721-724 0175-7598 33:6<721 1990 33 253 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer