The invention belongs to the technical field of
bioremediation of
marine oil pollution, and relates to an immobilized algal-bacterial symbiotic
system for
processing petroleum pollutants. The immobilized algal-bacterial symbiotic
system is prepared by the following steps: (1) selection and axenic cultivation of
algae species, firstly carrying out
lysozyme and
sodium dodecyl sulfate (SDS) sterile pretreatment on
chlorella algae fluid, and then inoculating into a BG11 culture solution containing
antibiotics to carry out sterile cultivation, so as to obtain sterile
chlorella algae fluid for later use; (2) selection and cultivation of
petroleum degrading
bacteria; (3) preparation of composite carrier
bacteria algae gel balls, namely immobilizing the sterile
chlorella algae fluid obtained in the step (1) and the
petroleum degrading
bacteria obtained in the step (2) by adopting
sodium alga acid and
polyvinyl acetate (PVA) as immobilized carriers, and finally obtaining the immobilized algal-bacterial symbiotic
system. The immobilized algal-bacterial symbiotic system can float on the water to carry out degradation of
petroleum pollution, and is free of secondary
pollution, free of toxic action on microorganisms, rapid in
reaction speed, stable and reliable in operation, less in
microorganism loss, and free of separation.