• 환경위생공학
• /
• 제23권3호
• /
• pp.23-30
• /
• 2008

This study was carried out to get efficient of nutrient removal effects on the treatment of paper making wastewater using submerged biological film process. The concentration of average BOD at raw wastewater was $324mg/{\ell}$ and COD was $435mg/{\ell}$. The average BOD of effluent was maintained $24.2mg/{\ell}$ and average COD was $37mg/{\ell}$. The concentration of average T-N at raw wastewater was $16.5mg/{\ell}$ and T-P was $1.2mg/{\ell}$. The average T-P of effluent was maintained $2.3mg/{\ell}$ and average T-P was $0.08mg/{\ell}$. The concentration of average SS at influent wastewater was $263mg/{\ell}$. The average SS of effluent was maintained $28.2mg/{\ell}$. The result of this experiment was wastage sludge did generated and the removal efficiency of nutrients were kept equilibrium.

• 대한환경공학회지
• /
• 제29권9호
• /
• pp.997-1002
• /
• 2007

본 연구의 목적은 pilot scale ASBF(호기성 침지형 생물막) 반응기를 이용하여 용해성 유기물과 질소화합물의 제거실험을 하였으며, 고정생물막 내에서의 용해성 유기물과 질소화합물 제거를 통한 종속영양미생물 및 독립영양미생물의 동적관계를 이해하고 개선하고자 하였다. 또한, 침지형 생물막 표면에 질산화 박테리아의 성장을 촉진시키기 위해 특별하게 설계한 구조를 라군에 추가하여 폐수처리 효과의 강화 가능성을 조사하였다. 침지형 생물막에 공기 기포가 직접적으로 접촉할 수 있도록 하였으며, 특히 낮은 온도에서 ASBF 실험장치의 용해성 유기물과 암모니아성질소 제거효과를 살펴보기 위해 회분식으로 운전하였다. 본 연구의 ASBF 반응조는 향후 용해성 유기물과 질소화합물의 제거를 위해 기존 폐수처리장 뿐만 아니라 신설 폐수처리장에도 확대 적용될 수 있을 것으로 기대 된다.

• 한국환경과학회지
• /
• 제17권11호
• /
• pp.1265-1271
• /
• 2008

Aerated submerged bio-film (ASBF) pilot plant has been developed. The presented studies optimized an inexpensive method of enhanced wastewater treatment. The objectives of this research were to describe pilot scale experiments for efficient removal of dissolved organic and nitrogen compounds by using ASBF reactor in plug-flow reactor (PFR) and improve understanding of dissolved organic matter and nitrogen compounds removal rates with dynamic relationships between heterotrophs and autotrophs in the fixed-film reactor. This research explores the possibility of enhancing the performance of shallow wastewater treatment lagoons through the addition of specially designed structures. This direct gas-phase contact should increase the oxygen transfer rate into the bio-film, as well as increase the micro-climate mixing of water, nutrients, and waste products into and out of the bio-film. This research also investigated the efficiency of dissolved organic matter and ammonia nitrogen removals in the ASBF. As it was anticipated, nitrification activity was highest during periods when the flow rate was lower, but it seemed to decline during times when the flow rate was highest. And ammonia nitrogen removal rates were more sensitive than dissolved organic matter removal rates when flow rates exceeded 2.2 L/min.

• Environmental Engineering Research
• /
• 제14권4호
• /
• pp.238-242
• /
• 2009

This study investigated the effects of organic loading rates on simultaneous carbon and nitrogen removal in an innovative fixed-film aerobic bioreactor. The fixed-film bioreactor (FFB) was composed of a two-compartment aeration tank, in which a synthetic filamentous carrier was submerged as biofilm support media, and a settling tank which polyvinylidene media (Saran) was used as settling aid for suspended solids. Three different organic loading rates, ranging from 0.92-2.02 kg chemical oxygen demand/$m^3$/day were applied by varying hydraulic retention time (HRT). The total soluble organic carbon removal efficiencies were in the range of 90-97%. The removal efficiency of ammonia was found to be in the range of 70-84%. Total nitrogen removal efficiency was found to be in the range of 40-45%, which indicates that denitrification reactions occurred simultaneously in the attached biofilm on the fibrous media in the aeration tank. The settling performance of suspended solids was significantly improved due to the presence of Saran media in the settling compartment, even for a short HRT. The fixed-film aerobic bioreactor used in this study demonstrated efficient treatment efficiency even at higher organic loading rates and at short HRTs.