NOVELTY - A mixed microbial cell contains lactic acid bacteria (L1) (FERM P-22138), bacillus (B1) (FERM P-22139), bacillus (B2) (FERM P-22137), and yeast (Y1) (FERM P-22140).    USE - A mixed microbial cell for neutralization deodorizer and insect repellant (all claimed) used for pigsty and henhouse.    ADVANTAGE - Mixed microbial cell is easily digestible, cholesterol count in blood is reduced, pathogenic microbe is eradicated, and acidity of excrement is neutralized.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for:    (1) neutralization deodorizer and insect repellent containing aqueous solution which has mixed microbial cell;    (2) method to heighten feed effect and achieve reduced odor of excrement which involves providing mixed microbial cell and dilution in water of neutralization deodorizer and insect repellent to livestock;    (3) fermentation of livestock excrement which involves providing mixed microbial cell as lactic acid feed to heighten feed effect and neutralization deodorizer and insect repellent;    (4) deodorizing method which involves sprinkling mixed microbial cell, neutralization deodorizer, and insect repellent directly to excrement;    (5) deodorizing exhaust apparatus which spreads and deodorizes aqueous solution to exhaust gas in livestock barn processed by method of neutralization deodorizer and insect repellent;    (6) manufacture of soil neutralization biological materials for organic farming containing organic substance which involves performing aerobic fermentation of process excrement by neutralization deodorizer and insect repellent with rotary fermentation apparatus;    (7) deodorizer which spreads mixed microbial cell or neutralization deodorizer and insect repellent in spot-like manner to pet's excrement or toilet and removes odoriferous smell; and    (8) deodorizing purification apparatus which is fixed in water channel, pond, reservoir, and water tank which makes sponge, timber, zeolite, pumice stone, and charcoal impregnate mixed microbial apparatus or neutralization deodorizer and insect repellent and sprays air.    DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional diagram of pigsty using neutralization deodorizer and insect repellent.    Pigsty (1)    Channel (2)    Feed box (3)    Pig (4)    Excretion (5)