The invention discloses a preparation method of an immobilized
microorganism embedding
microsphere for restoring a riverbed bottom mud
ecosystem. The preparation method comprises the steps of PVA (
polyvinyl alcohol)
gel preparation, cross-linking agent preparation and
microsphere preparation, wherein the PVA
gel preparation comprises the steps of preparing a PVA solution with a concentration of 8-10%, adding embedding agents to the PVA solution, namely
sodium alginate with a concentration of 0.5-2%,
calcium carbonate with a concentration of 0.2-0.5%,
silicon dioxide with a concentration of 2.0-4.0%, and 300-500 mesh attapulgite
powder or 300-500 mesh
activated carbon powder with a concentration of 0.5-1.0%, and adding activated limon
microorganism bacterium liquid with a concentration of 10-15%; and the
microsphere preparation comprises the steps of dropwise adding PVA gel to a
calcium chloride saturated
boric acid solution, stirring, obtaining immobilized
microorganism activated spherular particles with the particle size of 3-5mm, conducting immobilized crosslinking for 24-36h at 4-8 DEG C, taking out, and washing with normal
saline. Compared with the prior art, the microsphere can remove
total organic carbon and
total nitrogen in riverbed bottom mud effectively, and can improve COD (
chemical oxygen demand),
ammonia nitrogen and
total nitrogen pollution conditions of an overlying
water body of the bottom mud, and the preparation method is an ecological riverway management scheme which is efficient, low-consumption and simple to operate, and has a development prospect.