农业环境科学学报2012，Vol.31Issue(11)：2249-2255,7.
脱氮副球菌的好氧反硝化特性及对养殖水体中氮素的控制
The Aerobic Denitrification Characteristics of Paracoccus Denitrificans and Its Nitrogen Control for Aquaculture Water
摘要
Abstract
This paper focused on the aerobic denitrification characteristics of Paracoccus denitrificans and its nitrogen control for aquaculture water. In the experiment, Paracoccus denitrificans was used to determine its optimum growth conditions under aerobic condition and removal effect of NO- 2-N, NO-3 - N under different dissolved oxygen conditions. The results showed that, under aerobic condition, the optimum growth temperature was 30 °C, the optimum pH value was 7.0. Under high dissolved oxygen condition (6.6～7.3 mg·L-1), the maximum removal rate of NO- 2-N and NO- 3-N, removed via assimilation, but minor removed via denitrification, reached to 100% and 97.58%, respectively. With the decrease of dissolved oxygen, the denitrification capacity of Paracoccus denitrificans was enhanced, and the removal proportion via denitrification increased. Paracoccus denitrificans (viable counts≥5 109·mL-1) was used to control the nitrogen pollution of aquaculture water, when the concentration of Paracoccus denitrificans in aquaculture water reached to 1.0 mg·L-1 and 2.5 mg·L-1, the NH+ 4 -N of aquaculture water decreased by 41.89%～49.23%, NO-2-N decreased by 33.33%～42.86%, NO- 3-N decreased by 48.28%～67.74% within 10 days. The results indicated that Paracoccus denitrificans could effectively control nitrogen pollution of aquaculture water. The details of the aerobic denitrification of Paracoccus denitrificans provided a new idea for nitrogen removal of aquaculture water.关键词
脱氮副球菌/好氧/反硝化/养殖水体/硝酸盐氮/亚硝酸盐氮Key words
Paracoccus denitrificans/ aerobic/ denitrification/ aquaculture water/ nitrate nitrogen/ nitrite nitrogen分类
资源环境引用本文复制引用
刘道玉,范立民,王琼,吴伟..脱氮副球菌的好氧反硝化特性及对养殖水体中氮素的控制[J].农业环境科学学报,2012,31(11):2249-2255,7.基金项目
中央级公益性科研院所基本科研业务费(中国水产科学研究院)专项资金项目(2012A0301) （中国水产科学研究院）
现代农业产业技术体系建设专项资金资助项目(CARS-49) （CARS-49）
