本文改进了用于测定羧甲基壳聚糖羧甲基取代度的灰分分析法。

In the paper, an ashing method was improved to characterize the degree of carboxymethyl substitution of carboxymethyl chitosan.

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秸秆化学组成成分分析结果表明，麦秸、稻草的粗纤维在180天后分别残留了15.3%、21.5%，油菜的粗纤维分解相对较慢，三种秸秆的木质素和粗灰分均有增加的趋势。

After 180 days, the coarse fibre of wheat and rice were remained by 15.3%, 21.5%, the lignin and coarse ash were showing a tendency to increase.

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运用了耙式浓缩机的沉降规律，对浓缩机底沉降料层灰分分布进行了分析，建议采用底流双流制进行底流分别处理，达到增效节能的目的。

Based on the sedimentation rule, the bottom sediment distribution in rake thickener is analysed, and bottom flow separation is suggested to raise the production efficiency.

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