TITLE:
Restoration Study of Microorganisms in Lake Water Purification
AUTHORS:
Fang Yang, Rui Zhu
KEYWORDS:
Water Purification Microorganisms; COD; Total Phosphorus; Total Nitrogen
JOURNAL NAME:
Engineering,
Vol.5 No.10B,
December
18,
2013
ABSTRACT: We screened the bacteria with restoration and purification
functions in lake water and found that,Bacillus
subtilishad the highest water purification ability. Photosynthetic
bacteria, lactobacillus bacteria, nitrifying bacteria and oligotrophic bacteria
also showed different levels of lake water purification and restoration. L1873orthogonal experiments were designed to optimize the ratio of complex agents
to get the best ratio of various bacteria as 10g/LBacillus subtilis, 2g/L
photosynthetic bacteria, 0.8g/L lactobacillus, 0.6g/L nitrifying
bacteria 1, 0.4g/L nitrifying bacteria 2 and 0.6g/L oli-gotrophic
bacteria. When lake water was purified for 30 d under this ratio, total
phosphorus content decreased 85.90%, total nitrogen content decreased 70.96%, and
COD value decreased 81.19%.