NOVELTY - A thermophilus spawn PTA-1773 having environmental purification properties comprising heat-resistant bacterium C-1, which is related species of Bacillus brevis, heat-resistant bacterium C-3, which is related species of Bacillus stearothermophilus, heat-resistant Actinomyces MH-1 and/or heat-resistant Lactobacillus LM-2, is new.    USE - The spawn is useful as a ecological improvement material, organic fertilizer, biological pesticide, feed additive, soil purifier, organic refuse processing agent, compost fermentation promoter and phytoremediation regulator. It is also used for producing fermented food, fermented drinks, chemical/medical agents and biodegradable plastics (claimed).    ADVANTAGE - The thermophilus spawn PTA-1773 provides ecological-environment with excellent stability, durability and antioxidation ability. The material can be produced effectively using the spawn. The material is highly safe with respect to humans. The material effectively prevents acidification of soil, hence utilized as fertilizer for promoting growth of plants. The material has excellent deodorizing property, and is therefore utilized as a deodorizer during compost processing.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following:    (1) ecological-environment improving materials, which is obtained by adding thermophilus spawn PTA-1773 with organic raw materials and fermenting at 50-90degreesC under aerobic conditions;    (2) organic fertilizer containing the material;    (3) biological pesticide containing the material;    (4) a plant, which is grown by adding the fertilizer and pesticide;    (5) fodder/feed additive containing the material;    (6) animals raised by ingesting the fodder/feed additive;    (7) water purifier containing the material;    (8) soil purifier containing the material;    (9) organic refuse processing agent containing the material;    (10) compost fermentation promoter/deodorizer containing the material;    (11) phytoremediation regulator containing the material;    (12) antimicrobial containing the material;    (13) fermented food, which is obtained by fermenting the foodstuff raw material containing the material in presence of fermenting microbes;    (14) fermented drink, which is obtained by fermenting the drink raw material containing the material in presence of fermenting microbes;    (15) chemical/medical agent, which is obtained by cultivating the chemical/medical agent producing microbes in presence of the material; and    (16) formulation for preparing biodegradable plastics, containing the material.