NOVELTY - Processing concentrated organic waste liquid using microorganisms, involves subjecting waste liquid to alkali treatment, inoculating a thermophilic bacterium capable of degrading decomposition-resistant organic substance and fermenting the waste liquid by alkali treatment.    USE - (M1) is useful for processing concentrated organic waste liquid using microorganisms. (M1) is also useful for manufacturing fermented liquor fertilizer and fermented liquor feed which involves carrying out fermentation processing by (M1) (claimed). The organic waste liquid include foodstuff factory outlets, waste from confectioneries or human based livestock excrement.    ADVANTAGE - (M1) enables to process highly concentrated organic waste liquid, rapidly. (M1) is highly economical.    DETAILED DESCRIPTION - Processing (M1) concentrated organic waste liquid using microorganisms, involves subjecting the organic waste liquid having COD value of 5000 ppm to alkali treatment at a pH of more than 9 using sodium hydroxide or aqueous ammonia, inoculating a thermophilic bacterium capable of degrading decomposition-resistant organic substance of agricultural or livestock farming waste material and fermenting the concentrated organic waste liquid by alkali treatment to reduce the COD to 1000 ppm or less, where the thermophilic bacterium is chosen from:    (a) Actinomyces, Thermoactinomyces, SK 053sp. nov. (Institute of technology National Institute of Bioscience and Human Technology, having accession number FERMP-13598), or a Thermoactinomyces having growth temperature of 10-85 degreesC and growth pH of 5.3-10.8,    (b) Actinomyces having lignin solubilizing activity and cellulose decomposability, and having a growth temperature of 40-80 degreesC, preferably 65-72 degreesC, and    (c) a thermophilic bacterium which forms a symbiotic association with the cellulose degrading microorganism Clostridium thermocellum SK522 (FERM-BP No. 3459) which ferments cellulose, capable of growing at a wide pH range and having high activity even at alkaline conditions.    An INDEPENDENT CLAIM is also included for alkali fermentative treatment of concentrated organic waste liquid using a culture of alkaline bacteria isolated by (M1).    DESCRIPTION OF DRAWING(S) - The figure shows a top view of alkali treatment tank for carrying out fermentation, and a fermenter.    alkali treatment tank (1)    fermenter (2)    chemical feed apparatus (3)    pH meter (4)    waste liquid transfer pump (5)    heating apparatus (6)    air pump (7)