摘要:
对污泥茶渣等物料进行堆肥发酵,结果表明:不同物料配比堆肥第3d均进入高温(75℃)降解阶段,持续时间16～18d。污泥含量40%～50%处理的全氮、速效氮含量高于污泥含量30%的处理;处理D全氮含量最高,达19.17gkg-1,各处理全氮平均值大小顺序为DECBA;处理E速效氮含量最高,为1171mgkg-1,各处理速效氮平均值大小顺序为EDCBA。堆肥过程中纤维素酶活性的变化与污泥或茶渣的含量无明显的相关关系,而与温度呈正相关线性关系。处理A、B、C、E的纤维素酶活性于第8d达最高值,分别为0.396、0.498、0.499、0.498mgg-1d-1,处理D第12d达最高值,为0.590mgg-1d-1。随着茶渣用量的增加,脲酶的活性有所降低;经相关关系分析,脲酶活性与茶渣用量呈负相关关系,各处理脲酶活性平均值大小顺序依次为CADEB。
Abstract:
Enzyme activities in compost containing various proportions of sludge and tea waste were compared.The results showed that the higher compost temperature was reached on the third day,and maintained for 16-18 days for all treatments.The total N in the compost containing 40%-50% of sludge was higher than when 30% sludge was used.The total N of Treatment D was 19.17 gg-1,which was the highest among all treatments.The order of total N content for the treatments was DECBA.The available N of Treatment E was 1171 mgg-1,which was the highest among all treatments.The order of average available N for the treatments was EDCBA.The cellulase activity increased linearly as the temperature rose.On the 8th day,the cellulase activities of the Treatment A,B,C and E reached maximum values of 0.396,0.498,0.499 and 0.498 mg-1-1,respectively.Treatment E attained the highest value of 0.590 mg-1-1 on 12th day.The urease activity decreased with increasing tea waste addition.The order of the average urease activity in the treatments was CADEB.
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