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Using Bacillus amyloliquefaciens for remediation of aquaculture water

Fengxing Xie2*, Taicheng Zhu3, Fengfeng Zhang2, Ke Zhou2, Yujie Zhao2 and Zhenghua Li1*

Author Affiliations

1 Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, 32XiQiDao, Tianjin Airport Economic Park, Tianjin, 300308, People’s Republic of China

2 Tianjin Research Center of Agricultural Biotechnology, Tianjin, 300192, People’s Republic of China

3 Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, People’s Republic of China

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SpringerPlus 2013, 2:119  doi:10.1186/2193-1801-2-119

Published: 20 March 2013

Abstract

Remediation of aquaculture water using microorganisms like Bacillus species is a burgeoning trend for the sustainable development of aquaculture industries. In this work, a Bacillus amyloliquefaciens strain (namely B. amyloliquefaciens HN), isolated from activated sludge of a polluted river, was evaluated for its potential in water remediation using simulated aquaculture water. B. amyloliquefaciens HN exhibited high tolerance towards 80 mg l-1 of nitrite-N and ammonia-N. It could effectively remove 20 mg l-1 of nitrite-N, but was inefficient in eliminating ammonia-N when the ammonia-N concentration was below 20 mg l-1. Further studies showed that the ammonia-N removal by B. amyloliquefaciens HN was more efficient at 30°C and 35°C than 25°C, and that maximum nitrite-N removal rate was achieved at pH 8.

Keywords:
Bacillus amyloliquefaciens; Aquaculture water remediation; Nitrogenous compound; Nitrite removal