준혐기-호기 생물막 공정을 이용한 돈사폐수 처리

임재명,한동준 江原大學校 附設 環境硏究所 1998 環境硏究 Vol.15 No.-

This research aims to develop biofilm process for the nutrient removal of piggery wastewater. The developed process is the four stage anoxic-oxic biofilm process with recirculation of the final effluent. In summery, the results are as follows:1.Nitrigication in the piggery wastewater built up nitrite because of the high strength ammonia nitrogen The nitrigication of nitrobacter by free ammonia was inhibited in the total ammonia nitrogen loading rate with more than 0.2kgNH_(3)-N/㎥·d 2.The maximal total ammoria nitrogen removal rate was obtained 22℃ and without being affected by the loading rate. But oxidized nitrogen production rate was largely affected by loading rate. 3.Autooxidation by the organic limit was cause of the phosphorus release in the aerobic biofilm process. But the phosphorus removal rate was 90 percent less than the influent phosphorus volumetic loading rate of above 0.1kgNH_(3)-N/㎥·d Therefore the phosphorus removal necessarily accompanied the influent loading rate. 4. On the anoxic-oxic BF process the total average COD mass balance was approximately 67.6 percent. Under this condition the COD mass removal showed that the cell synthesis and metablism in aerobic reactor was 42.8 percent and that the denitrification in anoxic reactor was 10.7 percent, respectively.

목질계 Bulking Agent가 돈분의 1차 퇴비화에미치는 영향

임재명,한동준,강현재 江原大學校 附設 環境硏究所 1996 環境硏究 Vol.13 No.-

The objective of this study was to determine the operational parameters in pig manure compo-sting in which sawdust was used as a bulking agent. The efliciencies of the sawdust as a carbon source and the moisture control capabilty in composting process are investigated. The effect of compost recycling is studied as well. When the C/N ratio increased from 17 to 28. decomposition of volatile organic matter improved because of the increased conversion to carbon. However, at a ratio above 28. it decreased. During the composting both the conversions of inorganic nitrogen to organic nitrogen and the carbon to CO_(2) showed a tendency to increase. As a result pH increased to a range of 8.5~8.9. and it appeared that prevention of the loss of nitrogen was not possible. Volatile organic matter was most effectively decomposed at a 60% of the initial moisture content. The content of sawdust required to maintain an appropriate C/N ratio and the moisture content was 17% and 30% of the pig manure on wet weight basis, respectively. It was impossible to meet the appropriate operational requirements simulta-neously by using bulking agent only. With respect to the improvement in volatile organic decomposition. the optimum recycle ratio appeared to be 14% of pig manure on wet weight basis. which accounts for approximately 45% of the amount of sawdust used.

소규모 축산폐수 처리를 위한 RBC/AFBR 공정의 Package화

임재명,권재혁,류재근 江原大學校 附設 環境硏究所 1996 環境硏究 Vol.13 No.-

Using rotating biological contactor(RBC) with artificial endofleneus stage and aerobic fixed biofilm reactor(AFBR), organic material removal and biological nitrification of piggery wastewater has been studied at a pilot plant RBC was operated in the endogenous phase at a interval of every 25 days, The concentration of COD, BOO and TKN in influent wastewater were from 2,940 to 3,800 ㎎/L, from 1,190 to 1,850 ㎎/L and from 486 to 754 ㎎/L respectively, The maximum active biomass content represented as VSS per unit aera was 2.0㎎/㎠ and biofilm dry density of 17 ㎎/㎤ was observed at biofilm thickness of 900 ㎛. It was observed that the pilot scale RBC/AFBR process exhibited 72 percentage to 93 percentage of BOD removal, In order to obtain more than 90 percentage of BOD removal, the organic loading rate to the RBC/AFBR Process should be maintained less than 0,09 ㎥/㎡. day(125,9 gBOD/㎥.d), The TKN removal efficiencies was from 455 to 90,9 Percentage according to vary influent loading rate, It was estimated that the RBC/AFER Process consumed approximately 6,2 ㎎/L(as CaCO_(3) ) of alkalinity per 1 ㎎/L a of N_(3)-N oxidized as the nitrification took piace.

돈사폐수 처리를 위한 AFBG/ANHBR 공정의 Package화

임재명,권재혁,한동준 江原大學校 附設 環境硏究所 1996 環境硏究 Vol.13 No.-

This study was performed for package of piggery wastewater treatment system, inquired into component of organic matter and biodegradable characteristics in piggery wastewater and extracted removal efficiencies and operating conditions of aerobic fixed biofilm reactor/anoxic fixed biofilm re-actor(AFBR/ANFBR) process with Sun Lock (S/L.™) media, The component characteistics of or-ganic matter in piggery wastewater include 60 percentage of readily biodegradable COD, 25 percent-age of non-biodegradable COD and producted inert material by metabolism of m icroorganisms. In order to reduced sludge production rate and aggravation of water quality, endogenous respiration phase was accepted at first AFBR reactor. As a results of this operating condition, sludge production was minimized and removal efficiency was maintained stability. In order to obtain more than 90 percentage of BOD removal in AFBR/AHFBR process, the sur-face loading rate and volumetric loading rate to the AFBR should be maintained less than 17g BOD/㎡· day and 1.7 kg BOD/㎡· day respectively. Under this condition, BOD removal efficiencies of first AFBR, ANFBR and last AFBR exhibited above 80 percentage, 17 percentage and 40 per-centage, respectively. The removal efficiency of TKN and NHf-h at the loading rates below 5.60 gNH,-N/㎡ · day and 0.56 kg NH_(3)-N/㎥ ·day f·ere above 76 percentage and 82 percentage,respectively.

춘천시 생활쓰레기의 위생관리를 위한 배출 및 잊 ·화학적 특성

임재명,강성환,한동준,김병욱 江原大學校 産業技術硏究所 1997 産業技術硏究 Vol.17 No.-

Generation and physico-chemical characteristics of municipal solid wastes are very important for sanitary management. However, that has not been investigated os far especially in chunchon. And so, we tried to examine many things in detail. It was resulted that density was 90∼94kg/㎥ in school and office zone and 290∼kg/㎥ in apartment and market place. The compositional weight fraction was food, 40∼54%, paper, 14∼18%, vinyl and plastic, 14∼20% in house zone and market place and paper, 42∼70% in school and office zone. Moisture was estimated to be 54∼57% in independent house zone, apartment and market place and 11∼23% in school and office zone. And three composition was water content, 44.1%, incineration particle, 11.2%, volatile parts, 44.7% in respectively. That is because of seasonal effects and regional characteristics. In the results of chemical composition and caloric value analysis, carbon(C) was 80% in vinyl and plastic and oxygen(O) was 54.4% in paper.

생물학적 황산염 환원올 이용한 금속광산 갱내수의 증금속 제거

임재명,이찬기,한동준 江原大學校 附設 環境硏究所 1996 環境硏究 Vol.13 No.-

A laboratory experiment was performed to investigate the mine drainage treatment using the biological sulfate reduction. An acetate- added synthetic wastewater was used because of low organic content in the acid mine drainage. The Presence of heavy metals in the synthetic wastewater was an operational variable for the laboratory experiment. On the basis of series of experiment, it was found that the sulfate reduction rate and or-ganic removal rate increased with an increment of hydraulic retention time in the laboratory reactors. It was also note that the reactor fed with wastewater containing heavy metals showed a better Performance. It was reasoned that the reduction of sulfide(S^(2-)) toxicity due to the heavy metal complexation, resulting an enhanced microbial activity in the reactor fed with wastewater containing heavy metals, Total removal rate of heavy metals in the lab re-actor was highly correlated with the sulfate reduction rate, and the sulfate reduction rate was closely related with COD removal rate. In addition, an order of heavy metal removals during the sulfate reduction was found as follows : Zn >Pb >Co>Ni>Cu

수정된 토양트렌치 공정을 이용한 소규모 오수처리

임재명,김병욱,강성환 江原大學校 附設 環境硏究所 1998 環境硏究 Vol.15 No.-

This research aims to improve the previous trench process. The modified process is consist of 3 processes; first setting tank, 3-staged second contact-filter, and last trench system. The experiments was operated by varying the HRT 8, 6 and 4 hours in trench. The results of laboratory experiments showed removal rate of 97~98% of TKN 91~98% do T-P. From the results of this research, organic materials were removed in settling setting tank and nutrients in the trench stage. Therefore it is recommended to replace the previous 3-staged contact-filter to 1-staged one, and to increase contact-time in trench system.

축산폐기물 처리를 위한 고부하 활성슬러지 공정에서의 유기물 특성 변화

강성환,임재명 江原大學校 附設 環境硏究所 1999 環境硏究 Vol.16 No.-

This research was carried out to investigate the characterization of organic matter in Jet Loop Reactor for livestock wastes treatment and then suggest usable data for its design and operation. The characteristics of organic matters were divided into follows: i) readily biodegradable organics, S_(S) ii) slowly biodegradable organics, X_(S). iii) inert soluble organics, S_(I) and iv) inert suspended organics, X_(I). In this research, swine wastes were used as substrate after its settling and screening. Experimental results were summarized as follows. The fractions of readily biodegradable organics(S_(S)), slowly biodegradable organics(X_(S)). inert soluble organics(S_(Ii)) and inert suspended organics(X_(I)) were 41.9%, 44.3%, 4.4% and 9.4%, respectively. Consequently, biodegradable organics was about 86.2% and nonbiodegradable organics was about 13.8% in the swine wastes. Also, X_(S), S_(I) and X_(I) in effluent from Jet Loop Reactor were 48.8%, 24.8% and 26.4%, respectively. Especially, it could be found that S_(S) was removed perfectly during reaction in Jet Loop Reactor. The removal rate of total biodegradable organics was 84.5%, but nonbiodegradable organics was increased 1.1% in the effluent from Jet Loop Reactor.

석탄폐석의 흡착능 및 흡착제로의 활용방안에 관한 기초연구

한동준,임재명,이찬기,이해승 江原大學校 附設 環境硏究所 1998 環境硏究 Vol.15 No.-

본 연구에서는 산과 계곡에 폐기물로 방치되어 있는 석탄폐석의 재활용 및 자원화의 측면에서 수처리에이용될수 있는 흡착제의 개발을 위한 기초실험을 수행되었다. 석탄폐석으로는 굴진폐석과 선탄폐석이 이용되었으며, 석탄폐석 자체가 지니고 있는 흡착능 실험과 열처리로 인한 흡착능 개선 여부를 검토하였다. 처리대상물질은 중금속, 색도,그리고 COD들을 선정하였다. 실험조건은 회분식과 컬럼식으로 구분하여 각각 이루어 졌으며 실험결과 다음과 같은 결론을 얻을수 있었다. This research aims to remove heavy metals. nonbiodegradable COD(NBDCOD), and color using the coal waste. The experimental by heat treatment was performed to advance the adsorption capacity. The results are as follows ; i) The coal waste had the adsorption capacity of heavy metals and th rates were in the range of 20 to 30 percents. ii)The heat treatment was the optimum condition that the reaction time was 6 hours at 500℃. iii) In the column experimen non-treated coal waste remoned the COD and color in the range of 20 to 60 percents. iv)Heat-treated coal waste showed higher removal rate of the color in biological efflunt, and heavy metal and COD removal rates were changed by the filteration rates.

호기성 고정생물막 반응조에서 인의 제거

한동준,임재명,우영국 江原大學校 産業技術硏究所 1996 産業技術硏究 Vol.16 No.-

While the enhanced biological phosphorus removal(EBPR), in anaerobic/aerobic condition, was known to remove phosphorus by means of metabolism of poly-Pmicroorganisms, the phosphorus removed could be released in the form of ortho-P in the aerobic fixed biofilm reactor. This study was initiated to investigate the cause of ortho-P release in the aerobi c fixed biofilm reactor. The resutls indicated that the phosporus release was caused by autooxidation. The synthesis and release of phosphrous were related to the ORP and the boundary value for the phase change was about 170mV. In the synthesis phase, the phosphorus removal rate per COD removed was 0.023mgP?/mgCOD?. The phosprous contents of the microorganism were 4.3~6.0% on a dry weight basis.