The application of Marine self-flocculating bacteria in the treatment of saline wastewater
QIN Xu
YANG Ping
Ma Haoran
TIAN Haoran
TIAN Guifen
FAN Xiangyu
HUANG Zhaosong
Abstract：The microbial isolation and purification technique was used to successfully screen a strain Y25 with high flocculation activity from marine mud,which was identified as a Gram-positive bacterium be-longing to the genus Paenibacillus,with the highest degree of similarity to Paenibacillus chitinolyticus,by Gram staining and 16S rRNA sequence analysis.The effects of environmental parameters such as tem-perature,pH,dissolved oxygen and salinity on the growth characteristics of the strains were investigated by a one-factor experimental system,and their potential application value in the treatment of high-salt wastewater was evaluated.The experimental results showed that the flocculation activity of strain Y25 peaked at 26 h of incubation cycle,and its optimal culture conditions were 3％salinity(w/v),30℃,pH 7.0,and 200 r/min;in the simulated saline wastewater system,the removal of chemical oxygen demand(COD),total phosphorus(TP),and ammonia nitrogen(NH4+-N)by this strain could be up to 89.1％,76.7％,and 88.6％,respectively.The self-flocculating strains proved to be valuable for the application in the treatment of saline wastewater.
Keywords：autoflocculating bacteriaPaenibacillus chitinolyticus Y25salt-laden sewageone-factor opti-mizationsewage treatment
Publication Date：2026-02-25
Online Publishing Date：2026-08-28(First online date of this platform, not the publication date of the document)
Pages：9( 139-147 )