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干化床和芦苇床稳定污泥过程中的腐殖化特征

Keywords: 腐殖质,芦苇床,污泥干化床,污泥稳定

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Abstract:

通过现场实验,考查污泥干化床和污泥干化芦苇床稳定污泥过程中的腐殖质变化特征,重点分析了污泥腐殖化率和污泥腐殖化指数的变化情况。系统运行了3年,包括前2年的污泥负荷期和第3年的自然稳定期,检测分析在第3年进行。实验结果表明,污泥腐殖质含量历月变化不大,基本在1.1%~2.1%范围;总体上污泥的腐殖化率具有上升趋势,同一时间样品芦苇床中污泥的腐殖化率略高于干化床;污泥腐殖化指数呈上升趋势,但芦苇床略低于传统干化床;4—11月,干化床中的污泥腐殖化指数从0.079升高到0.742,芦苇床从0.042升高到0.715。经过3y的稳定化处理,污泥的腐殖化程度和腐熟度得到有效提高。

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