Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7709746 | International Journal of Hydrogen Energy | 2017 | 8 Pages |
Abstract
Long term use of anammox carriers immobilized in PVA/alginate has always faced problem due to expansion and bursting due to dense surface. The physical and morphological characteristics were investigated by adding foaming agent to 0, 0.15, 0.3, 0.6 and 1.2Â w/v% to increase the gas permeability. Maximum real and bulk density, minimum specific surface area and swelling ratio were found at 0.3Â w/v% foaming agent. The gas permeability increased continuously up to 1.2Â w/v% foaming agent, as found in the break point test. The 0.3Â w/v% foaming agent gave optimum bacteria retention capacity of 98.9%. With 0Â w/v% foaming agent, non-porous outer layer was burst due to pressure of produced nitrogen gas as confirmed by morphology test. Addition of foaming agent caused porous structure and the anammox bacteria grew deep inside the carrier. Therefore, the optimum foaming agent content of 0.3% can greatly enhance process stability in the deammonification system.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Daehee Choi, Dongryeol Lee, Wonsang Yun, Jinyoung Jung,