McMahon Matthew J L, Daugulis Andrew J
Department of Chemical Engineering, Queen's University, Kingston, ON, Canada.
Biotechnol Lett. 2008 Mar;30(3):467-73. doi: 10.1007/s10529-007-9566-4. Epub 2007 Oct 31.
An N(2) strip gas was used in a packed bed sulfate-reducing bioreactor to recover the dissolved sulfide product and improve sulfate conversion. The highest volumetric productivity obtained was 261 mol H(2)S m(-3) d(-1). Lowering the initial pH of the medium from 7 to 6 increased the H(2)S content of the strip gas from 3.6 to 5.8 mol%. The ratio of strip gas to liquid flow rates (G/L) was found be to a suitable basis for scaling the process. Calculations indicated that modest G/L values (<10(2)) were required to recover the residual dissolved sulfide in a downstream stripping column.
在填充床硫酸盐还原生物反应器中使用N(2)脱除气来回收溶解的硫化物产物并提高硫酸盐转化率。获得的最高体积产率为261 mol H(2)S m(-3) d(-1)。将培养基的初始pH从7降至6，使脱除气中的H(2)S含量从3.6 mol%增加到5.8 mol%。发现脱除气与液体流速之比（G/L）是该过程放大的合适依据。计算表明，需要适度的G/L值（<10(2)）才能在下游汽提塔中回收残留的溶解硫化物。
