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황연,이효숙,이우철,정용대,이원권,Hwang, Yeon,Lee, Hyo-Sook,Lee, Woo-Chul,Jeong, Yong-Dae,Lee, Won-Kwon 한국자원리싸이클링학회 2000 資源 리싸이클링 Vol.9 No.2
생물여과법에 의한 유해성 유기물 제거용 저밀도 담체로 사용하기 위하여 석탄회를 출발물질로 이용하여 세라믹 담체를 제조하였다. 석탄회에 기공 조절용 및 탄소함량 조절용으로 밀가루를 첨가하여 약환원성 분위기를 유지하여 $1200^{\circ}C$에서 소결한 결과 1.6~1.8 g/$\textrm{cm}^3$의 겉보기 밀도를 얻을 수 있었다. 소결 시 공기를 차단하고 급속히 승온하여 시편 조성의 일부를 환원시킴으로써 액상을 형성할 수 있었으며, 이렇게 형성된 액상은 시편의 표면부근에 폐기공을 형성하여 밀도를 낮추었다. Low density ceramic supporter was prepared by using fly ash as a starting material for the application to the biological aerated filter system. Wheat powders were used to control the porosity of the supporter and the carbon content of the raw material. Apparent density of 1.6~1.8 g/$\textrm{cm}^3$ was obtained when the fly ash was sintered at $1200^{\circ}C$ in a weak reducing atmosphere. By maintaining the reducing atmosphere and sintering at a high heating rate, the liquid phase was formed from the reduced composition of fly ash. This resulted in the closed pore formation which enabled the low apparent density.
생물막 담체를 이용한 고농도 암모니아성 질소 함유 산업폐수의 유기물 제거 및 질산화 반응 연구
김용환,조재현,이용우,정용대,이원권 ( Yong Hwan Kim,Jae Hyun Cho,Yong Woo Lee,Yong Dae Jeong,Won Kwon Lee ) 한국물환경학회 1998 한국물환경학회지 Vol.14 No.1
Treatment of industrial wastewater containing high concentration of ammonia was studied using biofilm media such as Bio-CAP^(TM), Bio-PO.P^(TM) and Ringlace. Among the various configurations of biofilm media process, Bio-CAP^(TM)-Bio-POP^(TM) media process was considered as the best process for organic removal and nitrification reaction. Volumetric organic removal and nitrification rate of this process approached to approximately 6㎏ COD/㎥/day and 800g NH₃,-N/㎥/day, respectively. Settler was located between Bio-CAP^(TM) and Bio-POP^(TM) reactor to remove the inhibitory effect of SS on nitrification in 2nd Bio-POP^(TM) reactor. Organic removal rate and nitrification rate of Bio-CAP^(TM)-Bio-POP^(TM) process were 5 and 4 times higher, respectively than those of general activated sludge process. By using Bio-CAP^(TM)-Bio-POP^(TM) media process, it was expected to decrease the required area for treatment of industrial wastewater containing high concentration of organics and ammonia.
붕사 및 유리분말을 첨가한 석탄회로부터 저밀도 세라믹 담체의 제조
황연,이효숙,이우철,배광현,정용대,이원권,Hwang, Yeon,Lee, Hyo-Sook,Lee, Woo-Chul,Bae, Kwang-Hyun,Jeong, Yong-Dae,Lee, Won-Kwon 한국자원리싸이클링학회 2000 資源 리싸이클링 Vol.9 No.2
석탄회를 출발물질로 사용하고 봉사 및 유리를 첨가하여 저밀도 세라믹 담체를 제조하였다. 또한 성형체의 초기 기공율을 높이기 위하여 밀가루를 30wt% 첨가하였다. 봉사를 첨가함에 따라 겉보기 밀도 및 벌크 밀도가 낮아졌고, 석탄회에 대하여 15wt%의 붕사를 첨가한 결과 $1160^{\circ}C$에서 15분 소결하여 벌크 밀도 $0.79g/\textrm{cm}^3$, 겉보기 밀도 $1.10g/\textrm{cm}^3$인 담체를 얻을 수 있었다. 판유리를 분쇄한 후 212 이하로 체가름한 유리 분말을 첨가하면 붕사와 마찬가지로 밀도가 낮아졌으며, 12wt% 첨가하여 $1280^{\circ}C$에서 10분간 소결한 결과 벌크 밀도 $0.90g/\textrm{cm}^3$, 겉보기 밀도 $1.00g/\textrm{cm}^3$를 얻을 수 있었다. Low density ceramic supporter was prepared by using fly ash as a starting mterial with borax or glass powders. Also the wheat powders were used by 30 wt% to increase the initial porosity of the supporter. The density of the supporter decreased as the amount of borax increased. The bulk density of $0.79g/\textrm{cm}^3$ and the apparent density of $1.10g/\textrm{cm}^3$ were obtained when the fly ash with 15% of borax was sintered at $1160^{\circ}C$ for 15 minutes. The density also decreased as the plate glass powders past through $212\mu\textrm{m}$ size were mixed. When the fly ash with 12% of glass powder was sintered at $1280^{\circ}C$ for 10 minutes, the bulk and apparent density were $0.90g/\textrm{cm}^3$ and $1.00g/\textrm{cm}^3$, respectively.
DPB를 포함한 5 - Stage BNR 공정을 이용한 생물학적 질소 , 인 제거
유대환(Dae Hwan Rhu),박종복(Jong Bok Park),이재진(Jae Jin Lee),이원권(Won Kwon Lee) 한국물환경학회 2001 한국물환경학회지 Vol.17 No.1
The biological nutrient removal from wastewater with low C/N and C/P is difficult. This study was carried to remove nitrogen and phosphorus from wastewater by using the 5-stage BNR process with denitrifying phosphorus removing bacteria(DPB). The 5-stage BNR process could achieve stable phosphorus and nitrogen removal with less substrate consumed. These laboratory experiments revealed that step feed with DPB showed a possibility of biological nitrogen and phosphorus removal from low organic municipal wastewater. With DPB, specific denitrification rate was 1.3 ㎎NO₃-N/gVSS/hr and specific phosphorus utilizing rate was 2.0 ㎎SP/gVSS/hr.
수리동력학적 캐비테이션을 이용한 전자폐수 처리수에 함유된 칼슘저감에 관한 연구
박진영(Jin Young Park),김선집(Sun Jip Kim),이용우(Yong Woo Lee),이재진(Jae Jin Lee),황규원(Kyu Won Hwang),이원권(Won Kwon Lee) 大韓環境工學會 2007 대한환경공학회지 Vol.29 No.6
전자산업 중 반도체 및 LCD 공장과 같이 폐수에 불소가 다량 함유되어 있는 경우, 불소처리를 위하여 과잉으로 사용되는 소석회에 의하여 처리수의 잔류 칼슘농도가 높으며, 높은 잔류칼슘 농도는 폐수의 재이용 시 일반적으로 채택되는 membrane 공정의 불안정한 운전을 초래하게 된다. 따라서, 전자폐수의 재이용을 위하여 신뢰성 있으며, 경제적인 칼슘제거기술의 개발이 절실히 필요한 실정이다. 본 연구에서는 캐비테이션을 이용한 Hyperkinetic Vortex Crystallization(HVC) 공정을 적용하여 폐수중의 칼슘 이온의 calcification 속도를 촉진하였으며, HVC 공정 적용 시 기존 소다회법에 비하여 동일 약품 주입농도에서 31% 높은 칼슘제거효율을 보였다. 또한, 전자산업 폐수의 재이용을 위한 경제적인 칼슘제거효율인 70%를 달성하기 위한 최적 소다회 주입농도는 유입수 대비 530 mg/L였다. 반응조 내 동질의 반응 핵인 calcite seed 농도가 칼슘제거효율에 큰 영향을 주며, 최대 칼슘제거효율을 달성하기 위한 calcite seed 농도는 800∼1,200 mg SS/L이였다. 또한, 소다회 주입에 따른 calcite 발생량은 평균 0.30 g SS/g NA₂CO₃였다. HVC 케비테이션 생성장치의 설계 시 HVC 장치 통과횟수를 2∼5회 범위에서 안전율을 고려하여 용량선정을 하여야 한다. HVC 공정을 이용한 연속회분식 운전 결과, 유입수 칼슘농도 변화폭은 74∼359 mg/L(평균 173 mg/L)로 매우 컸던 반면, 처리수 칼슘농도는 30∼72 mg/L(평균 49 mg/L)로 비교적 안정적인 처리효율을 보여주었다. 본 연구결과 HVC 공정은 화학약품 사용량의 절감 및 이에 따른 화학슬러지 발생량의 감소를 기대 할 수 있는 친환경기술로 유지관리비를 최소화할 수 있는 장점이 있었다. Residual calcium concentration is high, in general, at the effluent of the fluoride removal process in the electronics industry manufacturing semiconductor and LCD. To increase the stability of the membrane process incorporated for reuse of wastewater, the residual calcium is required to be pre-removed. Hyperkinetic Vortex Crystallization(HVC) process was installed in the electronics industry manufacturing semi conductor as a pilot scale for accelerating calcification of calcium ion. Compared to the conventional soda ash method, the 31% higher calcium removal efficiency was achieved when HVC was applied at the same sodium carbonate dosage. In order to maintain the economic calcium removal target of 70% preset by manufacturer, the dosing concentration of the soda ash was 530 mg/L based on influent flowrate. The seed concentration in the reactor was one of the critical factors and should be maintained in the range of 800∼1,200 mg SS/L to maximize the calcium removal efficiency. The calcite production rate was 0.30 g SS/g NA₂CO₃ in the average. The economic HVC passing time of the mixture was in the range of 2∼5 times. Relatively, stable calcium concentration was maintained in the range of 30∼72 mg/L(average 49 mg/L) although the calcium concentration in the feed was severely fluctuated with 74∼359 mg/L(average 173 mg/L). The HVC process was characterized as environment-friendly technology reducing chemical dosage and chemical sludge production and minimizing maintenance cost.
BAC Pilot Plant 를 이용한 겨울철 암모니아성 질소 제거 및 THMs 변화
김동윤,이지형,강은조,서영진,이원권,전병희,윤정효 대한상하수도학회 1995 상하수도학회지 Vol.9 No.4
The raw drinking water quality is getting worse because of the winter drought and the conventional treatment system is’nt suitable to obtain the satisfied quality of water. So, the advanced water system, BAC(Biological Activated Carbon) process is said to be effective to remove dissolved organics and ammonia nitrogen. In our study, the BAC pilot plant using Nak-dong river water is tested in low temperature. Following results are found from the study. The ammonia nitrogen removal rate of BAC system using wood-based carbon(PICABIOL) was 99% in 6℃ temperature. Chlorine dosage in wood-based BAC effluent was reduced to 67% of that in sand filtered wate. It resulted from the removal of ammonia nitrogen. Also, THM formed by chlorine addition in wood-based BAC effluent was decreased to 65% of that in sand filtered water. In the case of dual-filter, the removal efficiency of ammonia nitrogen was increased 30% more than in conventional sand filter. According to this result, the ammonia nitrogen load to BAC system could be lessened by the use of dual-filter.