NOVELTY - Enclosed circulation type microorganism environmentally-friendly biofilter comprises a liquid excrement sump (10) for collecting solid-liquid separation with liquid manure from manure, an aeration tank (11) for storing liquid manure in odor condition supplied from the liquid manure water tank, and inducing aerobic or anaerobic biological reactions by microbial cultivation, and a manure storage tank (20) for storing liquid fertilizer processed from the aeration tank and supplying to farmhouse according to required amount.    USE - Used as enclosed circulation type microorganism environmentally-friendly biofilter.    ADVANTAGE - The biofilter improves odor treatment and provides desire environment for processing liquefied fertilizer.    DETAILED DESCRIPTION - Enclosed circulation type microorganism environmentally-friendly biofilter comprises a liquid excrement sump (10) for collecting solid-liquid separation with liquid manure from manure, an aeration tank (11) for storing liquid manure in odor condition supplied from the liquid manure water tank, and inducing aerobic or anaerobic biological reactions by microbial cultivation, and a manure storage tank (20) for storing liquid fertilizer processed from the aeration tank and supplying to farmhouse according to required amount. The aeration tank and the manure storage tank are provided micro-organisms habitat by arranging number of filter members located downstream in straight line to arrive downward from top via an adjuster, is made of synthetic resin material. The manure storage tank is repeatedly injected liquid fertilizer to the filter member in rough odorless condition. The filter member is made of a ring type clamping member for inducing individual alignment on a grid frame, a twist shape downwardly extended body portion made of synthetic resin material, and correlated with a retaining part, and a thinning member provided in bundle-type arrangement. The thinning member enhances biological reactions of microorganisms by forming a ring-shaped in cross section at both end of the body portion.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic flowchart of the method for processing odor using biofilter (Drawing includes non-English language text).    Water tank liquid manure (10)    Aeration tank (11)    Manure storage tank (20)    Supply pipe (21)    Nozzle (22)