底泥曝气改善城市河流水质的研究

Study on Remediation of City River Water Body by Technology of Aerating Sediments

以城市河流底泥为对象,研究了底泥曝气对水体修复的效果。研究表明:底泥曝气能强化水体溶解氧的恢复,有利于去除CODMn,并使其在较长时间内保持较低水平。底泥曝气对氨氮的去除效果一般,对总磷的去除效果最佳。底泥受扰动试验表明,底泥曝气能显著抑制CODMn、氨氮和总磷的再次释放。

The effect of the remediation of water body by the technology of aerating sediments was studied with sediments from city river as material. The results show that aerating sediments can strengthen the restoration of DO in water bodies. Removing CODMn by aerating sediments is effective and CODMn is kept low for a long time after aerating. Removing NH4^＋- N by aerating sediments is not effective. Removing TP is most effective by aerating sediments. The results of disturbed sediments show that the seconda ry release of CODMn, NH4^＋ - N and TP can be significantly restrained by aerating sediments.