Effect of COD to sulphate ratio and temperature in expanded-granular-sludge-blanket reactors for sulphate reduction
作者： Andy de Smul , Lode Goethals , Willy Verstraete
DOI: 10.1016/S0032-9592(98)00109-5
关键词: Nuclear chemistry 、 Chemical oxygen demand 、 Biogas 、 Biomass 、 Electron donor 、 Inorganic chemistry 、 Sulfate-reducing bacteria 、 Methane 、 Energy source 、 Ethanol 、 Chemistry
摘要: In an ethanol-fed expanded-granular-sludge-blanket (EGSB) reactor at 33°C, 80–90% of the sulphate load was removed a rate 4 g S/l d, provided that least 6 chemical oxygen demand (COD) per sulphate-sulphur supplied. The started up in matter days. Gradually decreasing ethanol to ratio (R) about stoichiometry, resulted 60–70% removal rates 7 d. Similar tendencies were observed with ethylene glycol as sole carbon and energy source. Total COD never reached more than 70–75%. This related rather high biomass washout. efficiency decrease when R set levels below 6, apparently because reducing bacteria (SRB) could not compete methane producing (MPB) for acetate produced from substrate dosed. Thermophilic operation 55°C, after stepwise increase temperature over period 23 days, did favour acetotrophic reduction. Yet, 48°C subsequently returning 33°C clearly enhanced conversion by SRB. case electron donor price 0.035–0.075 USD/kg COD, cost R=6 found be competitive i.e. R=2, biogas effectively used.
elsevier.com
sci-hub.se 参考文章(19)
R.T. van Houten, Biological sulphate reduction with synthesis gas. Van Houten. ,(1996)
Stephen H. Zinder, Physiological Ecology of Methanogens Springer, Boston, MA. pp. 128- 206 ,(1993) , 10.1007/978-1-4615-2391-8_4
Andy De Smul, Willy Verstraete, Retention of sulfate-reducing bacteria in expanded granular-sludge-blanket reactors. Water Environment Research. ,vol. 71, pp. 427- 431 ,(1999) , 10.2175/106143097X122077
A.J.H. Janssen, Formation and colloidal behaviour of elemental sulphur produced from the biological oxidation of hydrogensulphide Janssen. ,(1996)
J. A. Roels, J. G. Kuenen, F. W. J. M. M. Hoeks, H. J. G. Ten Hoopen, Anaerobic treatment of 'acid water' (methane production in a sulfate-rich environment) Progress in Industrial Microbiology. ,vol. 20, pp. 113- 119 ,(1984)
Punjai T. Selvaraj, Mark H. Little, Eric N. Kaufman, Analysis of immobilized cell bioreactors for desulfurization of flue gases and sulfite/sulfate-laden wastewater Biodegradation. ,vol. 8, pp. 227- 236 ,(1997) , 10.1007/978-94-017-1711-3_22
A. De Smul, J. Dries, L. Goethals, H. Grootaerd, W. Verstraete, High rates of microbial sulphate reduction in a mesophilic ethanol-fed expanded-granular-sludge-blanket reactor Applied Microbiology and Biotechnology. ,vol. 48, pp. 297- 303 ,(1997) , 10.1007/S002530051053
P. N. L. Lens, A. Visser, A. J. H. Janssen, L.W. Hulshoff Pol, G. Lettinga, Biotechnological treatment of sulfate-rich wastewaters. Critical Reviews in Environmental Science and Technology. ,vol. 28, pp. 41- 88 ,(1998) , 10.1080/10643389891254160
Jukka Rintala, Gatze Lettinga, Effects of temperature elevation from 37 to 55°c on anaerobic treatment of sulphate rich acidified wastewaters Environmental Technology. ,vol. 13, pp. 801- 812 ,(1992) , 10.1080/09593339209385215
R. Mendez, E. ten Brummeler, L.W. Hulshoff Pol, Start up of UASB reactors treating sucrose-containing substrates with a low COD/sulfate ratio. Environmental Technology. ,vol. 10, pp. 83- 90 ,(1989) , 10.1080/09593338909384721