异养协同硫自养ABR系统还原高浓度高氯酸盐

构建新型异养硫自养ABR反应器，以处理含高浓度高氯酸盐（ClO₄^-）废水，并探讨该工艺对不同浓度ClO₄^-的还原性能及硫酸盐（SO₄^2-）的产生规律，同时解析ABR系统内生物量及胞外聚合物（EPS）的变化特性.结果表明：在HRT=12h，进水ClO₄^-浓度为300mg/L时，去除率可达99.60%，出水SO₄^2-浓度稳定在150mg/L内.进水pH值为7.8~8.0，随着还原ClO₄^-浓度的升高，异养段出水pH值逐渐升高至8.0~8.3，自养段pH值则逐渐降低至6.6~6.9，异养协同硫自养ABR系统可实现酸碱的平衡.此外，提高进水ClO₄^-浓度可促进EPS的分泌，且异养段第一格室微生物分泌的EPS最多，其含量可达到102.46mg/（g·vss）.EPS的分泌可以形成保护层以抵制外界的压力，同时也起到储备碳源和能源的作用.

Heterotrophic combiningsulfur-based autotrophic process reduction of high concentration perchlorate using ananaerobic baffle reactor

A novel heterotrophic combining sulfur-based autotrophic ABR reactor was constructed to treatthe high concentration of perchlorate (ClO₄^-) wastewater.The ClO₄^- removal, the sulfate (SO₄^2-) production, the biomass and EPS changes under different ClO₄^- concentrationswereexplored. The results showed that the ClO₄^- removalefficiency reached to 99.60% at HRT of 12h and the influent ClO₄^- concentration of 300mg/L, the effluent SO₄^2- concentration was approximately stabilized at 150mg/L.The influent pH was approximately 7.8~8.0. With ClO₄^- concentration increasing, the effluent pH of the heterotrophic unit was increased to 8.0~8.3, while the effluent pH of the autotrophic unit was decreased to 6.6~6.9.Therefore, the combined heterotrophic and sulfur-based autotrophic process can achieve an acid-base balance.Moreover, the more EPScontent wasproduced by microorganism when influent perchlorate concentration increased gradually in the process.And the contentof EPS in the first compartment of the heterotrophic unit was maximum, which reachedto 102.46mg/(g·vss). The secretion of EPS can not only form a protective layer to resist external pressure, but also play a role in the reserve of carbon sources and energy.