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New development of the anaerobic processand the deninification process by combination with the activated carbon.

厌氧工艺及与活性炭结合脱硝工艺的新发展。

基本信息

批准号：
05680480
负责人：
HANAKI Keisuke
金额：
$ 1.28万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1993
资助国家：
日本
起止时间：
1993 至 1994
项目状态：
已结题

项目摘要

Combination of activated carbon with anaerobic treatment or denitrification is expected to create new mode of process operation and improve the process stability. The experiments were conductedon these poinst and the following results were obtained.1.Anaerobic Treatment : Wastewater containing phenol was treated with an anaerobic fluidized bed reactor packed with activated carbon. High and stable conversion of phenol to methane was obtained without deteriorating the effluent even when influent phenol was suddenly fluctuated. On the other hand, fluidized bed reactor packed with anthracite failed to show such high stability with leaving poor effluent quality. These results obviously showed that adsorption and desorption by the activatedsludge contributed much to the high process stability against influent fluctuation. Intentional influent fluctuation was provided to improve the overall reaction rate. The results indicate that the reaction rate was high during the desorption stage. Isotope C-13 was used to clarify the mechanisms of substrate degradation in this biological activated carbon process. The results showed that the adsorbed phenol was degraded by biofilm through direct transfer of phenol from the inside of activated carbon to the biofilm rather than transportation thorough bulk water. This suggests that the biofilm can obtain substrate from both sides, namely bulk water side and activated carbon side in this process.2. Denitrification Process : Intermittent supply of carbon source in denitrification of water containing nitrate without carbon source was attempted with using activated carbon column. The activated carbon successfully held organic carbon during feeding stage and gradually releasedit for denitrification during no feeding of organic source. Reasonably high percentage or denitrification was achieved with organic feeding of only once a day. Denitrification took place by using the adsorbed substrate in most of the time. This mode of operation can.

将活性炭与厌氧处理或反硝化相结合，有望开创新的工艺运行模式，提高工艺稳定性。本研究主要针对这一问题进行了实验研究，取得了如下结果：1.厌氧处理：采用活性炭填充的厌氧流化床反应器处理含酚废水。当进水苯酚浓度突然波动时，苯酚转化为甲烷的转化率高且稳定，且不会使出水水质恶化。另一方面，填充无烟煤的流化床反应器不能表现出如此高的稳定性，从而留下较差的出水水质。这些结果表明，活性污泥的吸附和解吸作用对提高工艺对进水波动的稳定性有很大贡献。有意的进水波动，以提高整体反应速率。结果表明，在脱附阶段反应速率较高。同位素C-13被用来阐明在这种生物活性炭过程中的基质降解机制。结果表明，吸附态苯酚在生物膜中的降解是通过苯酚从活性炭内部直接转移到生物膜中而不是通过本体水体的迁移实现的。这表明生物膜在此过程中可以从两侧获得基质，即本体水侧和活性炭侧.脱氮工艺：尝试采用活性炭柱间歇供应碳源进行无碳源含硝酸盐水脱氮。活性炭在投加阶段成功地固定了有机碳，在不投加有机源的情况下，活性炭逐渐释放用于反硝化。合理的高百分比或反硝化实现有机饲料只有一天一次。反硝化作用在大部分时间内是利用吸附基质进行的。这种操作方式可以。