Abstract: A biodeodorizer and a process to prepare the biodeodorizer which comprises (a) at least one strain selected from the group consisting of Lactobacillus deodorans, Lactobacillus clearans and a mixed strain of Lactobacillus sulfurica and Lactobacillus nitrosus, and (b) Streptococcus faecalis having the ability to produce antibiotics.

Abstract: A novel Lactobacillus clearans, Lactobacillus sulfurica and Lactobacillus nitrosus:which can decrease both Na.sub.2 S.9H.sub.2 O and/or NH.sub.3 when inoculated and cultured on:a medium comprising 5 g of meat extract, 5 g of peptone, 0.5 g of Na.sub.2 S.9H.sub.2 O, 5 g of glucose, 1 g of CaCO.sub.3, 0.5 ml of NH.sub.3 (as 100% ammonia) and 1 liter of water (pH, neutral);which shows no growth acceleration action even when said bacteria is cultured on a medium comprising a Stephenson-Wetham medium (hereafter merely referred to as (S-W); KH.sub.2 PO.sub.4 1 g, MgSO.sub.4.7H.sub.2 O 0.7 g, NaCl 1 g, (NH.sub.4).sub.2 HPO.sub.4 4 g; FeSO.sub.4.7H.sub.2 O 0.03 g, glucose 5 g)+vitamins (A: 900 IU, B.sub.1 : 1 mg, B.sub.2 : 1 mg, B.sub.6 : 1 mg, B.sub.12 : 5 gamma nicotinamide: 1.6 mg, calcium pantothenate: 8 mg, C: 64 mg, D.sub.2 : 120 IU)+casamino acid 1 g and 0.5 g of Na.sub.2 S.9H.sub.2 O and/or 0.5 ml (100% conversion) of NH.sub.