| 供氧方式及供氧量对堆肥发酵进程的影响 |
| 摘要点击 1369 全文点击 1039 投稿时间：2005-02-01 修订日期：2005-04-25 |
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| 中文关键词 微好氧 通气 堆肥化 木质纤维素 |
| 英文关键词 micro-aerobic forced aeration composting lignocellulose |
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| 中文摘要 |
| 对于麦秸、牛粪和鸡粪为原料的堆肥系统,通过翻堆和强制通气实现微好氧和好氧处理,测定了各种发酵参数的变化.结果表明,微好氧处理堆体内氧浓度始终小于1.5%,而通气处理堆体的氧浓度始终在4%以上;微好氧处理50℃以上高温期为23d,比通气处理多6d,而通气虽然高温期短但后期温度下降慢;微好氧处理的半纤维素含量从发酵开始时的13.86%下降到堆肥结束时的7.99%,纤维素含量由21.45%下降到16.07%,而通气处理最终半纤维素含量为8.50%,纤维素含量由21.45%下降到18.02%;从各种成分的下降曲线看,微好氧处理为一次下降,而通气处理基本为缓慢的2峰曲线.从硝酸根浓度、温度和C/N综合评价产物的腐熟度,微好氧处理进入腐熟约经35d,而通气处理经45～50d才进入腐熟.富集培养堆肥样品的试验证明0.01～0.05mg/L的微好氧和50～60℃高温是纤维素分解的最适宜条件. |
| 英文摘要 |
| The effect of oxygen concentrations was evaluated during the decomposition of some selected organic materials under a controlled condition composting process for a period of 60 days.Mixtures of cattle manure,chicken manure,and wheat straw at a(1∶3∶6) ratio were used in the experiment.Micro-aerobic treatment was attained by turning of heap at a frequency of one time each two(days,) while forced air was applied under aerobic treatment.Results showed that concentration of oxygen under micro-aerobic treatment was significantly lower than that of the aerobic treatment by 1.5% in all composting periods.The duration of thermophilic phase more than 50℃ of micro-aerobic treatment was 23 days,and was 6 days more than that of the aerobic.On the other hand,the decreasing of temperature of the aerobic treatment is slow.The concentration of hemicellulose and cellulose of the micro-aerobic treatment was decreased from the 13.86% and 21.45% to 7.99% and 16.07%,respectively.Under the aerobic treatment,only decreased to 8.50% and 18.02%,respectively.A marked compost maturity was noted under the micro-aerobic treatment than under the aerobic treatment as indicated by C/N,NO~-_3 ion,and temperature profiles.The optimal condition of cellulose degrading was micro-aerobic and high temperature between 50℃ and 60℃ proved by microorganism culture coming from the materials of the thermophilic phase. |
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