Characterization and coagulation-flocculation performance of a composite flocculant in high-turbidity drinking water treatment

Chemosphere
Xiang XiaYunxiao Xing

Abstract

Klebsiella variicola B16, a microbial bioflocculant (MBF-B16)-producing bacteria, was isolated and identified by its 16S rRNA sequence, biochemical properties, and physiological characteristics. The effects of culture conditions on MBF-B16 production, including carbon source, nitrogen source, C/N ratio, initial pH, and culture temperature, were investigated in this study. Results showed that 6.96 g of MBF-B16 could be extracted from a 1-L culture broth under optimized conditions. Chemical analysis showed that polysaccharide and protein were the main components. The neutral sugar consisted of galactose only, which was proposed in Klebsiella genus for the first time. In addition, a composite flocculant (CF) that contains polyaluminum ferric chloride (PAFC) and MBF-B16 for the removal of turbidity and SS in drinking water was optimized by response surface methodology. CF could reduce PAFC dosage by about 56.2-72%. Charge neutralization and adsorption bridging effect were the primary flocculation mechanisms.

Citations

Dec 19, 2019·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Bin XuPeng Dong
Jun 23, 2019·International Journal of Environmental Research and Public Health·Nkosinathi Goodman DlaminiViswanadha Srirama Rajasekhar Pullabhotla
Feb 26, 2020·International Journal of Environmental Research and Public Health·Huiru LiChunping Yang
Jul 28, 2020·Polymers·Nkosinathi Goodman DlaminiRajasekhar Vsr Pullabhotla
Jul 22, 2019·Environmental Science and Pollution Research International·Naim RashidYong-Keun Chang
Sep 11, 2020·Materials·Piotr MaćczakMarta Ziegler-Borowska
Jan 7, 2021·Environmental Science and Pollution Research International·Mohammad Rezaei ArdaniAbdul Rahman Mohamed
May 1, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Li ChenSi-Yi Pan
May 18, 2021·The Science of the Total Environment·Huihui ZhangHeming Wang
Sep 2, 2021·Environmental Science and Pollution Research International·Dongsheng WangKaiwei Ma

❮ Previous
Next ❯

Related Concepts

Related Feeds

Blood Clotting Disorders

Thrombophilia includes conditions with increased tendency for excessive blood clotting. Blood clotting occurs when the body has insufficient amounts of specialized proteins that make blood clot and stop bleeding. Here is the latest research on blood clotting disorders.