NOVELTY - Sludge aerobic treatment process is carried out in main gas production stage and micro gas production stage. Aeration aerobic treatment of sludge mixed material is carried out in main gas production treatment chamber for 3-8 days. The generated gas substance is collected in closed manner. The sludge mixed material is cooled, and transferred to micro gas production treatment chamber. Mixed material is aerated for 3-8 days. The generated substance is collected in centralized manner. Thus, recycling and gas emission reduction during sludge aerobic treatment are enabled.    USE - Recycling and gas emission reduction during sludge aerobic treatment.    ADVANTAGE - The recycling method and reduction of gas emission are quickly and economically carried out without affecting the environment.    DETAILED DESCRIPTION - Sludge aerobic treatment process is carried out in two stages including main gas production stage and micro gas production stage. The gas microbiological active environment of the micro gas production stage is improved by gas substance generated in the main gas production stage such that microorganism in the micro gas production stage carries out oxygenolysis of organic substance. The main ozone substance in the aerobic treatment process is removed. Aeration aerobic treatment of sludge mixed material is carried out in main gas production treatment chamber for 3-8 days, and real-time temperature of sludge mixed material is monitored. The generated gas substance is collected in closed manner. The sludge mixed material during the main gas production treatment is cooled naturally, and transferred to micro gas production treatment chamber. The gas substance is pressurized, and transferred mixed material is aerated for 3-8 days. The generated substance is collected in a centralized manner. The collected substance is discharged, when discharge standard is attained or introduced into aerated system when discharge standard is not attained. Thus, recycling and gas emission reduction during sludge aerobic treatment are enabled.