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Updated: May 12, 2026

Bioprospecting of Extremophilic Microorganisms to Address Environmental Pollution
Published on: December 30, 2021
Using Bacillus amyloliquefaciens for remediation of aquaculture water
Fengxing Xie1, Taicheng Zhu, Fengfeng Zhang
1Tianjin Research Center of Agricultural Biotechnology, Tianjin, 300192 People's Republic of China.
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.
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