Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 407419
Title Sulfate reduction during the acidification of sucrose at pH 5 under thermophilic (55 degrees C) conditions. II: Effect of sulfide and COD/SO42- ratio
Author(s) Lopes, S.I.C.; Capela, M.I.; Lens, P.N.L.
Source Bioresource Technology 101 (2010)12. - ISSN 0960-8524 - p. 4278 - 4284.
Department(s) Microbiological Laboratory
Sub-department of Environmental Technology
Publication type Refereed Article in a scientific journal
Publication year 2010
Keyword(s) granular sludge reactors - anaerobic-digestion - reducing bacteria - acidogenic phase - waste-water - toxicity - systems - degradation - performance - propionate
Abstract This work studied the effect of the sulfide concentration and COD/SO42- ratios (4 and 1) on sulfate reduction and acidification in a thermophilic (55 degrees C) UASB reactor fed with sucrose (4 g COD (I-reactor d)(-1)) operated at a reactor mixed liquor pH controlled at 5 for a period of 301 days. When implementing N-2 stripping, sulfate reduction efficiencies up to 95%, corresponding to volumetric sulfate reduction rates of 0.87 and 4.2 g (I-reactor d)(-1) at the COD/SO42- ratios of 4 and 1, respectively, were achieved. Sulfide was toxic to sulfate reduction at a total dissolved sulfide concentration of 100 mg l(-1). Acidification was always complete and acetate was the only form of substrate in the effluent at a COD/SO42- ratio of 1. The sludge was well retained in the reactor and kept its granular shape throughout the reactor run.
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