| Title |
Treatment of the Polluted Stream Water by Using the Gravel Contact Oxidation Process |
| Authors |
임연택 ; 윤조희 ; 서정범 ; 유순주 ; 류덕희 ; 홍정선 ; 서윤수 ( Y . T . Rim ; C . H . Yoon ; J . B . Seo ; S . J . Yu ; D . H . Rhew ; J . S . Hong ; Y . S . Suh ) |
| Abstract |
For a practical application of technologies for treating the polluted stream water, the Changneung Stream water at Koyang-Kun, Kyungki province was treated by using the Gravel Contact Oxidation Processes with the aerated and the non-aerated types as on-site facilities for one year. The results are as follows: 1. In the BOD concentration of the influent into facilities, annual average was 36.3㎎/ℓ. And monthly averages were the lowest as 6.6㎎/ℓ in Aug. and the highest as 40.2㎎/ℓ in Aug. In case of TKN, monthly concentrations were 3.2 ㎎/ℓ in Aug. and 13.3㎎/ℓ in Jun., which was caused by the difference of outflowing amount from paddy fields. 2. Annual BOD concentrations of effluents from the aerated and the non-aerated types were 15.6㎎/ℓ and 25.6㎎/ℓ, respectively and treatment efficiency was increased by the aeration. In the non-aerated type, average influent BOD concentration from Nov. to Feb. higher than 30㎎/ℓ was 61.1㎎/ℓ and effluent was 46.3㎎/ℓ but average influent BOD from Mar. to Oct. lower than 30㎎/ℓ was 18.5㎎/ℓ and effluent was 10.7㎎/ℓ. So it was essential to be aerated in the facility by judging from these efficiencies when the stream water over 30㎎BOD/ℓ was treated. 3. Annual influent suspended solid(SS) was 24.1㎎/ℓ and effluents were 6.4㎎/ℓ in the aerated type and 9.2㎎/ℓ in the non-aerated. It was essential to establish the facility for eliminating sludge which was generated in the gravel layer and inflowed from the stream, to upkeep the treatment efficiency of this facility. 4. In the case of TKN and T P, influent was 8.48㎎/ℓ and 1.10㎎/ℓ and effluent from the aerated and the non-aerated was 6.85㎎/ℓ, 0.86㎎/ℓ and 8.79㎎/ℓ, 0.99㎎/ℓ, respectively. |