| To solve the key technical problems of the breeding and Slaughter waste resources which need long time and low efficiency. This paper used slaughted waste as compost material, added high temperature resistant bacteria Geobacillus stearothermophilus, composted in six-channel composting and self-made breathing bottle for 60, 70, 80? continuous high temperature, studied on the effects of different conditions on the physicochemical property of windrow, researched the reason of high temperature rapid compost with Geobacillus stearothermophilus,found the optimum process parameters in 10 h compost fertilize, compared the application of natural compost and high temperature compost in the actual production. The results were as follows:(1)Added five different concentrations(0%, 0.25%, 0.5%, 0.75% and 1%) of thermophiles in windrow, bacteria suspension could lead to different starting process parameters. The results showed that the water content of 1% microbe treatment was 5.82% higher than that of control, PH and EC changed in different degrees, the carbon content of 0.25% microbe treatm ent was 9.20% lower than that of control, the total nitrogen content of 0.75% microbe treatment was 35.33% lower than that of control, the carbon nitrogen ratio of 0.75% microbe treatment was 4.34% higher than that of control.(2)Within 10 h,temperature changed in the two compost modes through heating period of 60? to 69?,high temperature period of 63~69?,69? to 61? cooling phase,finally closed to ambient temperature 60 ?,quickly achieved the result of normal temperature compost about 30 to 60 days. Th e moisture content in composting process ranged from 44% to 39.22%. The carbon and nitrogen ratio(C/N)decreased from 20.53% to 14.66%.The minimum content of oxygen was 4.5%. The highest content of carbon dioxide was 980 cm3/m3. The p H increased from 9.78 to 10.18. EC ranged from 2.89 to 1.06.(3)With the increase of composting temperature, 70 ? compost was in accordance with the compost period, but the temperature of 80 ? compost changed abnormal, the trend of water content was decreased all. p H and EC showed different degrees of downward trend in the two temperature compost. The change of oxygen content and carbon dioxide content was the phenomenon of mutual growth and decline. In conclusion, during 70 and80 ? compost, temperature, carbon and nitrogen ratio and other basic properties would occur abnormal changes, it was not conducive to shorten the compost cycle.(4) During the composting process of 60?, added bacteria to 0.25%, the minimum E4/E6 was about 2.2, the highest GI value was more than 135%, the minimum T value was 0.50, the minimum EC was3.0 m S/cm. While under 60 ?, added bacteria to 0.5%, the minimum of PH was about 8.45. Comprehensive showed, under60?, added bacteria to 0.25%, it was the best compost condition in this experiment.(5) During the composting process of 60 ? continuous high temperature, added 0.25% Geobacillus stearothermophilus, the temperature, water content, p H, EC were all decreased. The temperature reached at 61.3? after 4h and kept it up to 6h. After 6h, the compost material achieved to the relative maturity, the temperature decreased from 59.9 ? to 54.5?. The water content decreased from 43.5% to 30.5%. The p H value decreased from 10.08 to 9.66, and EC decreased from 2.18 to 1.11. Those Physicochemical properties changes were conducive to the production and application.(6) Compared natural compost with high temperature compost, the results showed that, in the natural compost groups, the first three months samples water content was more than 80%, total carbon content changed little, focused on about 40%, total nitrogen content was 1.7%~2.8%, the carbon and nitrogen ratio changed little after dehydration, around 17%~19%, PH fluctuated between 8.39~9.89, EC was higher than 4.0 m S/cm except fresh sample dehydra tion groups, the fourth month samples water content was 34.9%, total carbon content was 17.8%,total nitrogen content was 1.0%, carbon and nitrogen ratio was 18.16%,p H was 9.52, EC was 4.42. In the high temperature composting, particle and powder organic fertilizer water content respectively was 24.3% and 13.9%, total carbon content accounted for a smaller proportion of dry weight,total carbon content was 14.9%~17.8%, total nitrogen content changed not significant, both about 1%,the carbon and nitrogen ra tio was 16%~18%, p H was between 8.87 and10.02, The EC value reduced below the specified range 4.0 m S/cm. The above results showed that, the important period of the natural fermentation compost was after 3 months. The physicochemical properties significantly changed in 3~4 month. While high temperature composting matured in the short term, the physiochemical properties were in the range of maturity.The results of this study provided a reference for resource utilization in the large-scale breeding and slaughter waste. Laid the technical foundation for high temperature rapid composting of solid waste. |
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