| 包气带中造纸废水COD天然生物降解作用 |
| 摘要点击 1475 全文点击 1147 投稿时间：1999-05-31 |
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| 中文关键词 造纸废水 COD 生物降解 包气带 |
| 英文关键词 biodegradation, COD, paper mill wastewater, unsaturated zone. |
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| 中文摘要 |
| 通过野外试验和土柱实验，研究了造纸废水渠底部包气带中，天然形成的生化层分布特征及其对ＣＯＤ降解能力和机制．结果表明，包气带中生化层由生物氧化带和生物还原带组成，生化层的发育厚度受包气带厚度控制，当包气带厚度大于１０ｍ 时，生化层发育良好，对ＣＯＤ的降解率达到９７％ 以上． |
| 英文摘要 |
| In this paper distribution of natural biochemical layer and its biodegradation capability and mechanism in the unsaturated zone under the paper mill wastewater channel were studied through field tests and column experiments. The results indicated that the biochemical layer was composed of a oxidation zone and a reductive zone, thickness of biochemical layer was controlled by the thickness of the unsaturated zone. When thickness of unsaturated soil zone exceeds 10m, the biochemical layer developed well, the removal rate for COD was above 97%. |
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