以NO-3-N和NO-2-N为电子受体的反硝化聚磷过程的研究进展

目前反硝化聚磷研究多集中在以NO-3-N作为电子受体,理论成熟,实践可行,还采用现代的分子生物方法对此类菌的微生物特性进行了研究。但利用NO-2-N作为电子受体完成反硝化脱氮聚磷过程研究处于模糊控制的阶段,争议的焦点为抑制浓度。今后的研究方向为(1)应同步考察两种驯化过程中反硝化聚磷菌的种类、数量、缺氧条件下的反硝化聚磷速率。(2)应对利用NO-2-N的反硝化聚磷菌进行分离、筛选和鉴定,并明确菌的生物学特性和生物学利用。(3)PO43--P的去除途径,应考虑反硝化聚磷菌是否具有还原磷酸盐产生磷化氢的途径。(4)N的去除途径,应考虑N2O的产生及产生量。

Research Development of Denitrifying Phosphorus Accumulating Bacteria (DPB) Using NO-3-N and NO-2N as Electronic Acceptor

Most of the present study focused on DPB using NO-3-N as electronic acceptor in the field of denitrifying phosphorus accumulating.The theory was mature and the fulfillment was practicable,and microbial characteristics of DPB were investigated by the modern molecule biological method.However,the study on denitrifying phosphorus accumulating process using NO-2-N as electronic acceptor was still in the incomplete control phase,whose focus was on the control of concentration.The direction of later study was:(1) the category,the amount,the denitrifying phosphorus accumulating efficiency under anoxic phase in two kinds of domestication should be investigated;(2) DPB using NO-2-N should be isolated,screened,identified and the biological characteristics and usages should be investigated;(3) whether DPB could deoxidate phosphate into PH3 should be considered when thinking the PO43--P removal path;(4) the production and the amount of N2O should be considered when thinking the removal path of N.