1. 污水生物处理中增加的菌株属于异养细菌。
The added strains in the biological treatment of sewage belong to heterotrophic bacteria.
2. 在厌氧条件下，反硝化细菌利用无机碳源的营养成分将硝态氮转化为氮素释放，从而降低污染物的总氮含量。
Under anaerobic conditions, the denitrifying bacteria use the nutrients of the inorganic carbon source to convert the nitrate nitrogen into nitrogen release, so as to reduce the total nitrogen content of the pollutants.