Research on hydrophobic property of microorganisms and its effect on sedimentation of coal slime in coking wastewater
Abstract：The extraction-turbidimetry was used to determine hydrophobic percentage of microorganisms,the hydrophobic property of nitrifying bacteria and denitrifying bacteria with different pH value,temperature and growth cycle were studied,meanwhile,the variation of coal suspension Zeta potential and sedimentation features after coal powder absorbed different hydrophobic percentage of microorganisms were researched.It is shown that hydrophobic percentage of various strains are different.The hydrophobic percentage of active nitrifying bacteria is more than 90%,but it significantly decreases in the decline phase of cells.While,the hydrophobic percentage of denitrifying bacteria is less than 20%.Growth conditions on the influence of the bacteria hydrophobic in turn are pH value,temperature,and inactivated,its change rules are different to various strains.The study on coal suspension ξ potential proves that the absorption of nitrifying bacteria on coal surface is prior to minerals.Nitrifying bacteria and denitrifying bacteria both have biological flocculation effect on coal suspension.
Keywords：microorganismssedimentation of coal slimehydrophobic percentageabsorptionreuse of coke plant wastewater
Publication Date：2011-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)