Bioaugmentation Technology Of Low Temperature Wastewater

Water pollution problems of the Northeastern Old Industrial Base are so serious and can not be settled easily. Petrochemical wastewater and municipal wastewater discharged into water environments has become two public nuisances due to the quantity and quality. Aimed at the characteristics of low temperature(<15℃) and hard to treatment of wastewater, separation and combination strategy of engineering bacteria is discussed by analyzing special pollutants in wastewater. The selection principle of media is also analyzed. The method and parameter of mycelial pellet production and immobility of engineering bacteria are summarized through experimentation. A more cheapness and more efficiency bioaugmentation technoloty for treatment of wastewater in cold area is bring forward, which can expect to improve water quality of the Northeastern Old Industrial Base.With the selecion principle of content of organic matter, contribution to COD and biodegradability, the special pollutants of petroleum hydrocarbon, aniline, phenol, and contain color organic matter in petrochemical wastewater were determined by physicochemical and GC-MS methods. Three hundred and seventy two stains of low temperature engineering bacteria had been isolated for certain special pollutants. After further domestication and screening, 44 strains of high efficiency degrading bacteria were identified by physiological and biochemical methods.Ecological niche recombination was performed between 73 strains engineering bacteria from different sources (44 strains by seperatation and 29 from lab). By source recombination, ecological niche separation and self-adjustment construction, functional bacterial populations C1, C2 and C3 were formulated. Bio-affinitive suspending carrier and mycelial pellet carrier were developed in order to make full use of the degrading bacteria as well as increase the biomass and bioactivity per unit volume. The experimental study of the functional bacterial populations was also proceeded. The results showed that both carriers could satisfy the requirements of immobilization and the immobilized engineering bacteria could remain high removal efficiency to various pollutants.To acquire further designing and operational parameters when adopting...