A preliminary cost analysis of the biotreatment of refinery spent sulfidic caustic

被引:6
作者
Sublette, KL
机构
[1] Center for Environmental Research and Technology, University of Tulsa, Tulsa, OK 74104
关键词
sulfidic caustic; sulfide; Thiobacillus denitrificans; cost analysis; refinery waste;
D O I
10.1007/BF02920468
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Caustics are used in petroleum refining to remove hydrogen sulfide from various hydrocarbon streams. Spent-sulfidic caustics from three refineries have been successfully biotreated on the bench and pilot scale, resulting in neutralization and removal of active sulfides. Sulfides were completely oxidized to sulfate by Thiobacillus denitrificans strain F. Microbial oxidation of sulfide produced acid, which at least partially neutralized the caustic. A commercial-scale treatment system has been designed that features a bioreactor with a suspended culture of flocculated T. denitrificans, a settler and acid and nutrient storage and delivery systems. A cost analysis has been performed for nine cases representing a range of spent caustic sulfide and hydroxide concentrations at a base treatment rate of 10 gpm. This analysis shows that refinery spent-sulfidic caustic can be biotreated for 4-8.3 cents/gal.
引用
收藏
页码:695 / 706
页数:12
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