충진전해법에 의한 염색폐수 중의 총 질소 제거에 관하여

조병락,권기홍,최진균 영남이공대학 산업기술연구소 2003 産業技術硏究 Vol.15 No.-

A major pollutant, total nitrogen(T-N) in water quality mostly causes eutrophication and red-tide. A cotton/rayon-producing factory adopting a coagulation-activated sludge method is still producing a significant level of 400~1,500mg/1 T-N component in the secondary treatment effluent. In this work, a packed-electrolysis method was further teeted for the removal of T-N(216.3~285.1mg/1), which was residual, firstly treated by a decomposition-air stripping process from the secondary wastewater effluent. Experimental results showed that about 55~60% of T-N was removed in the conditions of 60min electrolysis, 25mm electrode distance, 25 A, together with C/Al electrode. T-N removal efficiency increased with increasing the amount of NaCl, where about 58% removal was achieved with the input of 6,000mg/1 NaCl. The range of pH 4-7 is generally good for electrolysis, but further increasing over pH 8 showed detrimental effects, and 70% removal of T-N was recorded with pH 5. The effects of packing materials revealed that activated carbon was proper for T-N, on the other hand, zeolite material was more effective for NH₃-N component. An activated carbon packed-electrolysis method is better than non-packed system in which the increase of ΔpH=1 and Δt=4.7℃ was noticed, and positive electrode packing type was better.

염색 폐수 처리장의 응집 슬럿지로 부터 Iron의 회수

조병락 영남이공대학 1988 論文集 Vol.17 No.-

The recovery of Iron from coagulation sludge in the dyeing wastewater treatment plant was investigated by using combined acidification-reduction method. The efficiency of the Iron recovery was achieved 90 percent at pH 1 and the strength of reducing agent was Na₂S >NH₂OH·HCI>NaHSO₃. It was confirmed that the optimal conditions for Iron recovery were to be pH 3 and 1.5 times of the stoichiornetric ratio for Na₂S dosage. Iron recovery by combined acidification-reduction method was superior to simple acidification and 80 percent of original sludge was decreased in its volume and 8 percent of total solids was increased in its concentration. In the coagulation criticizing of the dyeing wastewater containing 500mg/1 of COD, The recovered Iron was similor to the fresh Iron in effect of COD removal.

면 및 레이온 나염폐수중의 고농도 질소 제거를 위한 수처리 장치 개발

조병락 영남이공대학 산업기술연구소 2000 産業技術硏究 Vol.12 No.-

방해물질 존재하의 암모니아성 질소 제거를 위한 생물학적 활성탄 여과탑의 설계

조병락 영남이공대학 1989 論文集 Vol.18 No.-

It is confirmed from the biofilm model developed in the presence of inhibitors that ammonia-nitrogen is limiting species from the ratio of S_(??)S_(??) above 2.36 in the nitrification process. The residual ammonia-nitrogen obtained is corresponded the experimental value with the calculated value at various filter height on the low concentration of ammonia-nitrogen. Therefore, biofilm reactor in the presence of inhibitors can be proposed to design with biofilm model developed.

淨水處理場의 廢 Sludge로부터 Alum 回收 (Ⅰ)

曺秉樂,李元植,姜再馨 대구보건대학 1983 대구보건대학 論文集 Vol.7 No.-

An investigation, from waste sludge of G and S water treatment plant in Daegu city, was carried out for the recovery of alum by the acidification with H₂SO₄. The results are shown as follows; 1. The efficiency of the alum recovery could be 90 and 80 percent at pH 1 and 2, respectively. And when the molar ratio of H₂SO₄ to total aluminum is 1.5 : 1, alum had recovered 90 percent for the S plant and 70 percent for the G plant. 2. The sludge settling velocities by the aluminum dissolution was best effective at pH 1, but it was decreased as pH value is to increase otherwise the effects of sludge volume and suspended solid reduction were increased proportionally by the aluminum dissolution. 3. In the coagulation criticizing of the fresh alum and recovered alum from waste sludge, the recovered alum was superior to fresh alum in the low turbidity of the raw water while fresh alum was more efficient than recovered alum at the level of heigher turbidity. 4. It was proposed to a probable process for the reuse of recovered alum from waste sludge. Moreover, in considering of the sludge treatment problems, it can be expected that the reuse of recovered alum is more economics than commercial alum.

분해탈기법에 의한 염색폐수 중의 고농도 질소 제거에 관한 연구

조병락(Byeung-Rak Cho) 한국산업융합학회 2002 한국산업융합학회 논문집 Vol.5 No.3

Total nitrogen is a major pollutant which mostly causes eutrophication and red tide. Wastewater effluent from printing of cotton-viscose rayon containing high concentrations of total nitrogen can not be effectively treated with a typical biological treatment process. This paper provides a new treatment process and experimental results for the removal of high strength nitrogen from dyeing wastewater. The optimum conditions of air stripping for the removal of total nitrogen include around pH 12, temperature 60℃ with 60 minutes of stripping time. In case of a filtration-air stripping process, an initial level (500㎎/ℓ) of total nitrogen was significantly reduced to below 60㎎/ℓ. Deconite was synthesised for further decomposition of organic nitrogen. Thus, a filtration-decomposition-air stripping process was possibly achieved, by which a high level (900㎎/ℓ) of total nitrogen was effectively removed to below 60㎎/ℓ P. Finally, a continuous new process for the removal of total nitrogen is proposed and confirmed, based on batch experimental results, and its process validity is further discussed throughout.<br/> <br/>

새로운 불소처리제를 이용한 전자폐수처리에 관한 연구

조병락(Byeung-Rak Cho),서유덕(You-Duck Suh) 한국환경관리학회 2012 環境管理學會誌 Vol.18 No.4

본 연구에서는 새로운 불소처리제를 합성하고, 이를 이용하여 전자폐수에 대한 불소, COD, 칼슘제거율 및 슬러지 감소효과를 검토하였다. lime과 KE-100에 의한 불소 처리효율은 각각 90.7% 및 94.7%, COD 처리효율은 41.9% 및 69.7%로 나타나 새로운 불소처리제(KE-100)에 의한 불소 및 COD 처리효율이 각각 4% 및 27.8% 향상되어 나타났다. KE-100 및 lime으로 응집한 경우의 Ca<SUP>2+</SUP> 농도는 각각 840㎎/ℓ 및 2,280㎎/ℓ으로 나타나 KE-100으로 응집한 경우 Ca<SUP>2+</SUP> 농도가 2.7배 정도나 크게 감소되었다. KE-100 및 lime으로 응집한 경우의 슬러지 발생량은 각각 9 ㎏/㎥·폐수 및 22.5 ㎏/㎥·폐수로 나타나 새로운 불소처리제 KE-100을 사용하면 약40% 정도 슬러지 저감효과가 크게 나타났다. In this research, We synthesized a new fluorine treatment reagent and investigated treatment efficiency of fluorine, COD, Ca<SUP>2+</SUP> and sludge amount. Fluorine treatment efficiencies were 90.7% and 94.7% by lime and KE-100. In addition, COD treatment efficiencies were 41.9% and 69.7% by lime and KE-100, respectively. Fluorine treatment efficiency and COD treatment efficiency were increased by 4% and 27.8% with KE-100. Ca<SUP>2+</SUP> concentration with KE-100 was 840㎎/ℓ and it was 2.7 times smaller than Ca2+ concentration with lime. Ithe amount of Sludge with KE-100 coagulation was 9 ㎏/㎥ and it was 40% smaller than the amount of Sludge with lime

도시 고형폐기물의 지역별 쓰레기 성상 비교 : 서울 및 대구지역을 중심으로

曺秉樂,徐裕德,權起弘 영남이공대학 산업기술연구소 1995 産業技術硏究 Vol.8 No.-

This study was carried out to investigate the physico-chemical characteristics of municipal solid wastes generated in Seoul and Taegu area. Each waste sample was analyzed to obtain physical and chemical compositions. The average physical compositions of wastes in Seoul were garbage 54.7%, paper 18.1%, and plastics 12.1%, and those produced in Taegu were garbage 42.2%, paper 21.4%, and plastics 10.8%. The higher amount of papers and plastics is due to many office building. The annual generation rates of municipal solid wastes in Seoul and Taegu area were 1.16㎏/c.day and 1.04㎏/c.day. Bulk densities of municipal solid wastes made a difference at each sampling site and the average bulk densities of wastes produced in Seoul and Taegu area were 117㎏/㎥ and 114㎏/㎥, respectively. The average moisture contents of wastes from Seoul and Taegu area were 47.3% and 39.0%, and the volatile solids were 38.7% and 33.4%, respectively. The average low heating value of wastes from Seoul and Taegu area were 2,057kcal/㎏ and 1,877kcal/㎏.

染色 廢水 處理場의 凝集 廢Sludge로부터 Alum回收

曺秉樂 대구보건대학 1984 대구보건대학 論文集 Vol.8 No.-

An investigation, from coagulation waste-sludge of 3 dyeing industrial complex and P dyeing industrial co. in Daegu city, was carried out for the recovery of alum by the acidification with H₂SO₄. The results are show as follows; 1. The efficiency of the alum recovery could be 90 and 70 percent at pH 1 and 2, respectively, And when the molar ratio of H₂SO₄ to total aluminum is 1.5 : 1, alum had recoved 90 percent for the P plant coagulation sludge and 60 percent for the B dyeing wastewater treatment plant. 2. The sludge settling velocities by the aluminum dissolution was best effective at pH 1, but it was decreased as pH value is to increase, otherwise the effect of sludge volume and suspended solid reduction were increased proportionally by the aluminum dissolution. 3. In the coagutation eriticizing of the fresh alum and recovered alum from waste sludge. its likely that was increased than chemical dosage 32㎎/ℓ as A1 in the dyeing wastewater containing 500mgCOD/ℓ, while fresh alum was more efficient that was below than chemical dosage 32e/4 as Al. 4. It was proposed to a probable process for the reuse of recovered alum from waste sludge. Moreover, in considering of the sludge treatment problems, it can be expected that the reuse of recovered alum is more economics than commercial alum.

縣垂微生物接觸法 (HBC)에 의한 染色廢水處理

曺秉樂(Cho Byeung Rak),徐裕德(Suh You Duck),權起弘(Kwon Gee Hong) 한국환경관리학회 1995 環境管理學會誌 Vol.1 No.1