ABSTRACT

Appropriate concentration of biological growth additives can improve the treatment effect of organic waste gas by microorganisms. In this work, the growth capability of Brevibacillus agri and the biodegradation efficiency of m-dichlorobenzene were investigated at the presence of Zn(II) and Se(IV). The appropriate concentration of Zn(II) and Se(IV) was 5 mg/L and 3 mg/L, and the removal efficiency of m-dichlorobenzene in the BTF achieved 94.95%. The functional groups such as C=O and COO- produced active sites to capture m-dichlorobenzene molecule, hence there existing a positive interaction process between the strain and Zn(II) and Se(IV). In the coexistence system, the polysaccharide and protein contents of EPS increased to 8.00±2.96 mg/L and 21.82±0.50 mg/L, the zeta potential value decreased 11.02 eV, the enzyme activity raised 3.2 mM, which indicated that the bioaugmentation effect on m-dichlorobenzene degradation could be achieved by the presence of Zn(II) and Se(IV).

摘要

适当浓度的生物生长添加剂可以改善微生物对有机废气的处理效果。在这项工作中，研究了在存在Zn（II）和Se（IV）的情况下农业短杆菌的生长能力和间二氯苯的生物降解效率。Zn（II）和Se（IV）的适宜浓度分别为5 mg / L和3 mg / L，BTF中间二氯苯的去除率达到94.95％。诸如C = O和COO-的官能团产生了捕获m-二氯苯分子的活性位点，因此在菌株与Zn（II）和Se（IV）之间存在正相互作用过程。在共存体系中，EPS的多糖和蛋白质含量分别增加至8.00±2.96 mg / L和21.82±0.50 mg / L，ζ电位值降低11.02 eV，酶活性提高3.2 mM，