科研之友
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摘要
In order to avoid the micro-pollution of drinking water source due to ammonia nitrogen (NH 3-N) and organics, for the first time, a waterworks in Guangzhou city adopted the high-rate up-flow biological aerated filter (HUBAF) with a flow rate of 735 thousand ton per day as a pretreatment process. In the first three months after the stable operation, the NH 3-N content and COD Mn in raw water respectively reached 0.44~2.22 mg/L and 1.84~6.06 mg/L, and those in the pretreatment effluent were respectively below 0.5 mg/L and 2.0 mg/L. Moreover, the iron and manganese contents in the raw water were respectively up to 1.16 and 0.22 mg/L, while those in the waterworks effluent were respectively 0.05 and 0.03 mg/L. Due to the large-particle ceramic filter media combined with fluid-bed technology, the average removal of turbidity was only about 2.5 NTU and the head loss was steadily below 1.0 m. HUBAF adopts an air-water-combined backwashing system with up-and-down flow, which keeps the change of head loss within 0.1 m and makes it possible to share a common aeration system in the filter. The application of HUBAF demonstrates that, as compared with the biological pretreatment technologies that have been put into application, such as the elastic packing-contact oxidation technology and the suspended-ball fluidized technology, HUBAF possesses stronger resistance to impact loading, higher NH 3-N nitration rate and better removal of iron and manganese, and that the "HUBAF-conventional treatment" combined system is of a organics removal similar to that of the "O 3-BAC" advanced process.
- 出版日期2012-5
- 单位华南理工大学
