• Proceedings of the Membrane Society of Korea Conference
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• 1997.10a
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• pp.133-134
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• 1997

1. 서론 : 제지산업은 용수 다소비용 산업으로, 생산하는 제품 톤당 약 40톤으로 폐수가 배출되고 있으며 공정내로 재활용하는 폐수량을 고려한다면 그 사용량은 더욱 클 것이다. 이와 같은 다량의 용수 사용으로 인하여 제지 공장의 폐수를 제조공정에서 재활용하는 방법이나 배출량을 감소시키는 방안들이 법률적이나 경제적인 측면에서 연구되고 있는 실정이다. 본 연구에서는 기존의 응집, 침전공정을 대신하고 여재를 이용힌 물리적 여과와 활성높은 미생물이 여재 표면에 부착되어 수중 유기물질을 생물학적으로 분해 제거하는 이중의 효과를 거둘 수 있는 호기성 생물막 공정을 도입하고 그 처리수의 유기물 및 용존 무기물을 Membrane 공정으로 제거함으로써 제지공업폐수를 재활용하여 용수기준까지 처리하 System의 개발을 그 목적으로 하였다.

• Journal of Korean Society of Environmental Engineers
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• v.33 no.2
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• pp.77-84
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• 2011

This study was conducted to develop a novel combined system of a hybrid rotating biological contactor (RBC) process that was composed of an attached- and suspended- biomass reactor, followed by a settler and a biological aerated filter (BAF) column to treat a high strength slaughter wastewater. Long term influences of organic and nitrogen loading rates were investigated to see how the combined system worked in terms of the removal efficiency. A synthetic wastewater containing a pork cutlet steak source (commercially available) and swine blood was used to feed the combined system. The hybrid RBC process showed excellent removals: about 95% for soluble COD and 85% for ammonium nitrogen. However, the unsettled solids seriously deteriorated the removal efficiency of total COD (TCOD) and total nitrogen (TN) in the RBC process. A significant fraction of the TCOD and suspended solids (SS) was further removed in the BAF column although the effluent quality was still unsatisfactory, giving TCOD 300 mg/L, SS 180 mg/L and TN 59 mg/L. An addition of polyaluminium chloride into the RBC effluent improved the performance of the settler and BAF, producing an excellent quality of final effluent; TCOD 16.5 mg/L, SS 0 mg/L, TN 55.5 mg/L, TP 1.3 mg/L. Therefore, it was confirmed that the combined system of hybrid RBC and BAF could treat a high strength slaughter wastewater excellently.

• Journal of Preventive Medicine and Public Health
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• v.5 no.1
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• pp.43-48
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• 1972

5 bed sand filter, applying biological oxidation, was designed and studied on the treatment of water works. Never using any coagulant agent (drugs), which may cause water pollution in pre-treatment of head water, the auther attempt a high rate filtration by the microorganism (nitrofication bacteria) end plant which populate in multi layer sand beds. The result are as follows : In order to evaluate the oxygen effect on filtration, oxygen was injected in aeration tank attached to each filter tank while filtration, and $NH_3$ was tested as a representaiive ingredient. It was found out that the aeration method was more effective, with over 33% of $NH_3$ removal capacity, than the anerobic and this 5 bed filter showed double removal capacity of $NH_3$ by comparing with conventional sand bed (2 stage bed). According to the examination of two kind of head water, pre-treated with coagulant agent and activated carton, the filtration capacity was affected by the polluted condition of head water, resulting that lower value of pollution and slower velocity of filtration showed more efficiency of $NH_3$ removal. In this experiment $NH_3$ content tested in treated water had a fairly good correlation with others.