在 55°C 高温条件下，pH 值为 5 时蔗糖酸化过程中的硫酸盐还原。II：硫化物和 COD/SO(2-)(4) 比值的影响。

Sulfate reduction during the acidification of sucrose at pH 5 under thermophilic (55 degrees C) conditions. II: effect of sulfide and COD/SO(2-)(4) ratio.

机构信息

Sub-Department of Environmental Technology, Wageningen University Biotechnion - Bomenweg, 2, P.O. Box 8129, 6700 EV Wageningen, The Netherlands.

出版信息

Bioresour Technol. 2010 Jun;101(12):4278-84. doi: 10.1016/j.biortech.2010.01.010. Epub 2010 Feb 19.

DOI:10.1016/j.biortech.2010.01.010

PMID:20171883

Abstract

This work studied the effect of the sulfide concentration and COD/SO(2-)(4) ratios (4 and 1) on sulfate reduction and acidification in a thermophilic (55 degrees C) UASB reactor fed with sucrose (4 g COD(l(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 4.2g (l(reactor)d)(-1) at the COD/SO(2-)(4) 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/SO(2-)(4) ratio of 1. The sludge was well retained in the reactor and kept its granular shape throughout the reactor run.

摘要

本研究考察了在 55°C 下运行的 UASB 反应器中，硫酸盐还原和酸化的效果，其中 COD/SO(2-)(4)比值分别为 4 和 1，进水为蔗糖（4 g COD(l(reactor)d)(-1))，通过控制反应器混合液 pH 值在 5，运行 301 天。当进行氮气吹扫时，硫酸盐还原效率高达 95%，在 COD/SO(2-)(4)比值分别为 4 和 1 时，对应的容积硫酸盐还原速率分别为 0.87 和 4.2 g(l(reactor)d)(-1)。在总溶解硫浓度为 100mg l(-1)时，硫会对硫酸盐还原产生毒性。在 COD/SO(2-)(4)比值为 1 时，酸化总是完全的，并且在出水中只有乙酸盐作为基质的形式存在。污泥在反应器中得到了很好的保留，并在整个反应器运行期间保持了其颗粒状。