Bacillus subtilis (B. subtilis) is a kind of Grampositive
bacteria possessing multiple enzyme systems, which
might be useful in wastewater treatment. In this paper, in
order to confirm whether Bacillus subtilis BS7.29, a novel
strain isolated from soil in our previous work, could be applied
in the wastewater treatment, its effects on assimilation of
ammonium, transformation of nitrite, and degradation of
pectin were investigated. The results showed that the content of
NH3-N and NO2-N in aquaculture water decreased with time
increasing after being treated with B. subtilis BS7.29.
Furthermore, when the secretion enzyme extracted from this
bacterium was used to treat the paper-making white water, it
could reduce CD and turbidit, decrease the size of colloidal
substances and promote the deposition. These findings
suggested that B. subtilis BS7.29 might be valuable in the
wastewater treatment, and contribute to the development of
biological purification of industrial effluents
Bacillus subtilis (B. subtilis) is a kind of Grampositivebacteria possessing multiple enzyme systems, whichmight be useful in wastewater treatment. In this paper, inorder to confirm whether Bacillus subtilis BS7.29, a novelstrain isolated from soil in our previous work, could be appliedin the wastewater treatment, its effects on assimilation ofammonium, transformation of nitrite, and degradation ofpectin were investigated. The results showed that the content ofNH3-N and NO2-N in aquaculture water decreased with timeincreasing after being treated with B. subtilis BS7.29.Furthermore, when the secretion enzyme extracted from thisbacterium was used to treat the paper-making white water, itcould reduce CD and turbidit, decrease the size of colloidalsubstances and promote the deposition. These findingssuggested that B. subtilis BS7.29 might be valuable in thewastewater treatment, and contribute to the development ofbiological purification of industrial effluents
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