The Study Of Intensed Biological Activated Carbon To Low-Temperature Low-Turbidity Yellow River Source Water

Surface water occupies 70% of the water source in north city of our country, where is a cold period last for several months. During this period, surface water keep the low-temperature low-turbidity character, when the temperature of river falls between 0~1℃, comparing with that of reservoir between 2~4℃. The turbidity usually falls below 10 NTU. Those statuses bring challenge to drinking water treatment, that traditional treating technology can't guarantee the security of drinking water. So, it is necessary to seek an advanced and efficient technology to secure drinking water quality. It is the characteristic of Tianjin City's source water that evident seasonal variation, water-quality index unplanned over standard, representative pollutants in the low-temperature low-turbidity period. It is typical and representative. According to the characteristic of Tianjin City's source water, the advanced purification process of intensified biological activated carbon (IBAC) was used to reinforce traditional treating process for increasing organic pollution removal, guaranteeing the water quality during low-temperature low-turbidity period.In view of the difficulties caused by the low-temperature low-turbidity water, this study mainly includes the removal of NH3-N and seeking the resolve of low-turbidity water, the circulative effect of intensified biological activated carbon bed, the removing mechanism of micro-pollutants, the circulative character of IBAC about the pilot-plant. The intensified biological activated carbon combines activated carbon's absorption with domesticated bacteria's biodegradation. Comparing to naturally formed biodegradation on BAC surface, biodegradation operated by domesticated bacteria have higher activity which can release adsorption potential. It can be operation quickly through hydraulic cycling, and has the ability to anti-water quality impacting.The result of experiment indicated that, in low-temperature low-turbidity period, the removal rate of ammonia attained to 47.1%. When the ammonia...