| The abundant output of agricultural waste in our country was of great advantage. The component of agricultural waste include straw and livestock manure. Large amount of carbon and nitrogen were contained in the wastes, which can be used to composting. This method can not only solve the problem of environmental pollution, it can also improve crop yields. This test was carried out with two different methods intend to research the fermentation properties and the removing and transforming of nitrogen in different conditions.The mass ratio of sugarcane leaves/cattle manure was1:3. The study was conducted with two modes:aeration mode and pile-turn mode under the same external conditions. A detailed study on the influence factors of the composting was performed including temperature, pH, moisture, organic matter, the concentration of ammonia nitrogen, nitrate nitrogen and nitrite nitrogen. The results showed that comparing to the aeration mode, the temperature was2.5-5.2℃higher than that of turning mode, the ratio of the organic matter degradation was28.25%higher than that of turning mode, the final moisture content was8.08%higher than that of turning mode, the final pH was0.12higher than that of turning mode, the concentration of nitrate nitrogen was23～65mg/kg lower in the turning mode. The concentration of ammonia nitrogen in the first13days was48～1017mg/kg lower in the turning mode, and then1～42mg/kg higher in the turning mode. The concentration of nitrite nitrogen in the first13days was285～425mg/kg higher in the turning mode, and then41～118mg/kg lower in the turning mode. The result of GI is over50%. The results show that the fermentation properties and the removing and transforming of nitrogen were different in different composting modes.Composting was executed with two stock, sugar factory mud/peanut shell powder/microbial agents (sludge mixture) and cattle manure/peanut shell powder/microbial agents (manure mixture), in the same composter. A study on the influence factors of the composting was performed including temperature, pH, moisture, organic matter, the concentration of ammonia nitrogen, nitrate nitrogen and nitrite nitrogen. The composting results show that the highest temperature of manure mixture composting was80℃, and about70℃in the sludge mixture composting. The moisture content was reduced from70%to45%, the organic matter content was reduced from70%to46%, the pH was reduced from8.2to7.8in the manure mixture composting process. The moisture, organic matter contents in the sludge mixture composting were not change at rules. The moisture was change in the range of44～52%, the organic matter content was change in the range of40～49%. The pH is increased from7.3to7.8. The final concentrations of nitrate nitrogen were15974and27365mg/kg in manure mixture and sludge mixture composting respectively and eventually GI are100.4%and91.8%respectively. The results show that the fermentation properties and the removing and transforming of nitrogen were different with different composting feed.A contrastive analysis was done to the results of two composting style: manure mixture composting and turning composting. The result show that the change of temperature were same, Several steps were involved in the process: temperature-rise period, high temperature period, temperature-fall period and maturity period, the trend of organic matter changes went to decrease, the trend of ammonia nitrogen changes went to decrease, the trend of nitrate nitrogen changes went to increase, the nitrite nitrogen changes was influenced more by the fermentation feed and scale. The change of moisture was related closely with the temperature. The final pH was within the scope of6.5-8.5. These results show that the changes of temperature, organic matter, ammonia nitrogen and nitrate nitrogen were similar in the composting, but the nitrite nitrogen and moisture were influenced by the fermentation feedstock plus scale and temperature, respectively. |
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