Author(s)

Xiaoye Liu, Yang Yang, Lin Yue, Shanzhi Xin, Fang Huang, Zhen Lu, Minghua Hu, Hui Zhang

Corresponding Author

Xiaoye Liu

ABSTRACT

Nowadays flue gas desulfurization (FGD) by limestone gypsum was still the most effective and world widest method to solve the problem of SO2 emission. But the by-product wouldn’t be used easily. Biological fume gas desulfurization (BFGD) has been concerned on more and more widely for its characteristics of low investment and operation cost, low energy input and no secondary pollution. The selection of its carbon resource would be a key problem. Sodium lactate and potassium formate as carbon resource were applied to reduce sulfite to discuss the commonality and characteristics of this two types of carbon resource in this paper. The results show that the best COD/SO32- (calculated as SO2) ratio is around 3.0 in both cases. Sulfite reduction ratio could reach nearly 90% when enough sodium lactate is applied while potassium formate was used, the best COD/SO32- was around 2.74-4.11, and sulfite reduction ratio could reach nearly 80%. Sodium lactate would be more fiTable for such SRB to use as carbon resource. The results would apply some theoretic bases for realizing BFGD by SRB using different carbon resources.

KEYWORDS

Sulfate-reducing bacteria, Sodium lactate, potassium formate, sulfite reduction