Aik Sang Busik System내의 종속영양세균의 분포 및 특성에 관한 연구

정팔진,김성진,김민정 全北大學校 附設 都市및環境硏究所 1997 都市 및 環境硏究 Vol.12 No.1

Aik Sang Busik System(ASBS) was developmented in Japan. In currently, this system is operating at many night soil treatment plants in our country. The purpose of this study is to exame the effects of heterotrophic bacteria on the aeration basin of this system to remove organic compounds. As a result of tests, isolated heterotrophic bacteria are about 115 genes. The predominant gene is Acaligenus spp which about 32 percent of isolated genes. Because the floc foming bacteria of isolated heterotrophic bacteria are about 54 percent, a major removal mechanism for organic compounds in this system depends on the floc foming bacteria. The total amount of hetrotrophic bacteria is 2.32×10 exp (7) c.f.u/㎖, which is a little lower than that in the activated sludge system. As liquid degradable heterotrophic bacteria are 1.57×10 exp (7) c.f.u/㎖, carbohydrate degradable heterotrophic bacteria are 1.22×10 exp (7) c.f.u/㎖10^7, protein degradable heterotrophic bactera are 1.48×10 exp (7) c.f.u/㎖, The distribution of liquid, protein, carbohydrate degradable heterotrophic bacteria are similar to that of the sludge system.

축산폐수 처리시 연계처리 가능성과 미생물의 특성에 관한 연구

정팔진,현미희,김민정 전북대학교 공학연구원 ( 구 전북대학교 공업기술연구소 ) 2002 工學硏究 Vol.33 No.-

The livestock waste which contains a high concentration of nutrients was operated by aerobic digestion process and activated sludge process in order to observe the characteristics of biological N·P elimination. In addition, this result was different form that of municipal waste-water because of a complicated reaction caused by the characteristics of highly concentrated waste-water. After an aerobic process was operated for 15datys(HRT), NO3-N increased from 175 ㎎/L in influent to 980㎎/L in effluent and dissolved P increased from 51㎎/L in influent to 143㎎/L in effluent. Consequently, the treatment of P and N cause a big economic problem during the second-stage operation. When effluent which goes through an aerobic process in the second-stage operation is continuously treated by activated sludge, this effluent with or without O_3 contacts is experimented. The sample analysis was carried out by the class filter. The elimination rate of organic materials is not quite different form that of N·P due to the fact that the concentration of dissolved organic materials is very low, compared to NBD. However, the reactor is generally stable because its influent contacts with O_3 and there are a variety of microorganisms when they are observed through a microscope.

活性슬러지 工程에 있어서 酸素利用率과 內呼吸率에 關한 硏究

丁八鎭 全北大學校 1989 論文集 Vol.31 No.-

It is very important to find the process variables that reflect the removal rate and capacity of organic matter by the activated sludge. Stenstrom and Andrews, they show that specific oxygen uptake rate(SPOUR) reflects immediately the presence of shock loads which the tradional food to microorganism (F/M) ratio does not. Thus oxygen uptake rate (OUR) can be an early warning indication abnomal conditions. This study has two purposes. First is to find the SPOUR and OUR when the synthetic substrate was added or not at the begining stage of reaction. Second is to study the feasibility on the Monod's and Dechamp's mathemetical models. The conclusions are as follows. (1) The results could be expressed to some extend by Monod's model. when S_o<<K_s, (2) There was no any trends in the application of Dechamp's and Kendrick's model. (3) In order to reduce the concentration of D O from 4mg/ℓ to 1mg/ℓ, it took longer as S_o/X_o ratio was larger and shorter as its ratio was smaller.

長城湖의 水質特性에 關한 硏究

정팔진,박귀님,곽동희 全北大學校 附設 都市및環境硏究所 1995 都市 및 環境硏究 Vol.10 No.1

To investigate the water quality of the Lake Jangseong, samples were collected 4 times during this study period at five stations each season. According to the inflowing stream loading, BOD loading was caused to land, human activity and fish farm sequentially. COD, T-N and T-P were contributed to fish farm, human activity and land sequentially. The Lake Jangseong had the characteristic of high algae growth rate according to long hydraulic retention time and low mean depth(9m of mean depth, 0.76year of hydraulic residence time). The amount of phosphorus accumulated was 5.2㎏/d. The excessive critical loading was 2.10tP/yr. The actual inflowing 8.36tP/yr, showing 4 times higher than the excessive critical loading. The water quality of the Lake Jangseong was transparency 1.4m, water temperature 13℃, pH 7.3, DO 6.9㎎/ℓ, COD 4.2㎎/ℓ, SS 5.1㎎/ℓ, T-N1.104㎎/ℓ, T-P 0.070㎎/ℓ, chlorophyll-a 17.5㎎/㎥. The water quality value was the highest in the fish farm(L2) by sites and high in winter, fall, summber, spring sequentially.

하상퇴적물의 오염실태 조사분석

정팔진,김민정,김종신 全北大學校 附設 都市및環境硏究所 1998 都市 및 環境硏究 Vol.13 No.1

This study was performed in order to investigate organic matters and nutrient contents of sediments in the Chonju-cheon. Sample were collected 2 times during this study period at two points. The results were as follows ; 1. The contents of volatile solids in the sediments were in the range of 1.3∼10%. 2. The contents of total nitrogen were in the range of 0.06∼0.36%. 3. The concentrations of total phosphorus in the sediments of the Chonju-cheon were in the range of 1.7∼2.8㎍/㎏ and 2.7∼2.99㎍/㎏, respectively. 4. Mean concentration of COD in the sediments were measured 18,871㎍/㎏ and 4,869㎍/㎏, respectively. Therefore, it is surveyed that sediments of the study area not yet polluted.

대청호 저질의 용출특성과 수질에 미치는 영향

정팔진,이성우,곽동희 全北大學校 附設 都市및環境硏究所 1997 都市 및 環境硏究 Vol.12 No.1

Lake eutrophication that bring about by excessive amounts of phosphorus and nitrogen becomes the main problem in Daechung Lake. To control the eutrophication like water bloom, it is important to quantify the nutrients loading and estimate the mass balance in the lake. In this paper, it was carried out to evaluate the nutrients discharging and characteristics of release in Daechung lake and investigate the effect of sediments on water quality. Also, it is suggested that the method of water quality management is required to improve it. The results of study are summarized as following ; 1. It is estimated that about 54% of input TP is accumulated in Daechung lake 2. It is surveyed that the mean range of TP release rate is 4.2∼10.1㎎/㎡·d at sampling sites of the lake 3. In order to improve the water quality of Daechung lake, it is needed the wastewater treatment plant and the sediment dredging of the lake preferentially.

Burkholderia cepacia를 이용한 축산폐수의 처리

정팔진,조선영,현미희,김민정,이은주,전민식 한국물환경학회 2004 한국물환경학회지 Vol.20 No.6

We found that the Bacterium Burkholderia cepacia in livestock wastewater treatment plant was predominant species. We investigated the growth rate of this and treatment characteristics for organic matter and nitrogen removal in livestock wastewater using this microorganism. First, we cultured B. cepacia. And then, to conducted treatment for livestock wastewater by using B. cepacia., we changed C/N from 0.2~4.4. When we operated A and B process, changing F/M ratio from 1.2 to 4.4. In experiment of C/N variations, when C/N was 1.8, we found that the optimal condition for organic matter and nutrient removal effect was higher and the removal efficiency of SCOD_(cr), SBOD_5, NH₄-N was 78.4%, 95% and 74.8%. So, It is possible to treat the wastewater having the lower C/N contents such as livestock wastewater using this microorganism. In experiment of A and B process for livestock wastewater, we found that the removal efficiency of organic matter and nitrogen in operating mode of A process was higher than that of B process. Also, the optimal F/M operating A process was 0.013 and the removal efficiency of SBOD_5, SCOD_(cr), TN and TP were 97%, 60%, 95% and 91%.

동진강의 수질특성 및 동진강의 수질특성에 미치는 오염부하량의 영향에 관한 연구

정팔진,김민정,권지영 全北大學校 附設 都市및環境硏究所 1997 都市 및 環境硏究 Vol.12 No.1

This study was carried out in order to investigate for water quality of Dongjin river. Samples were collected 3 times during this study at 31 points. The water quality criteria of Dongjin river was polluted over second grade. Particularly, Jeongeup chun, Wonpyoung chun, Kobu chun were polluted highly than Dongjin river. BOD, SS, T-N, T-P loading were sequentially caused by live stock, human activity, land use and factory wastewater. The amount of BOD were respectively 16,348.9㎏/d, 95,169.2 ㎏/d, 6,379.3 ㎏/d, 1,128.1 ㎏/d by human activity, live stock, land use and factory wastewater. Particularly, 80 percent of total BOD loading resulted from live stock. 13.7%, 5.4%, 0.9% of total BOD loading respectively resulted from human activity, land use, factory wastewater. Total BOD loading of Dongjin river was 119,025.5㎏/d. Particularly, 36,067.0㎏/d of total BOD loading resulted from Wonpyoung chun, so environmental control must be focused on Wonpyoung chun.

용담댐 유역 영양염의 연중, 계절적 변화 및 지역적 분포

정팔진,김민정,권지영 全北大學校 附設 都市및環境硏究所 1997 都市 및 環境硏究 Vol.12 No.1

The water quality criteria of the Yongdam basin is polluted over second grade. Trophic state in the area indicate supper eutrophic state. This study was conducted to analyze the distribution characteristics of the nutrient, and to find the interrelationships among them, focusing upon the eutrophication in the Yongdam dam basin. The results of this study were as follows; 1. Nutrients was estimated as total nitrogen of 1.021∼1,034㎎/ℓ. 2. The trophic state was supper entrophic, and the state of DO level was supersaturation in spite of high organic loads from the each tributary. 3. The limiting factor of the reservoir is T-P, according to the criteria of eutrophication. 4. After Dam construction, T-P concentration of 26㎎/㎥ and Korea Trophic State Index of 50 were predicted.

타성상폐수의 주입이 하수처리효율에 미치는 영향

정팔진,곽동희,송탁식 全北大學校 附設 都市및環境硏究所 1996 都市 및 環境硏究 Vol.11 No.1

This study was to investigate the effects of dumping nightsoil, septage, and leachate to the activated sludge process receiving a mixture of sewage and industrial wastewater on its treatment performance. For the mixture of sewage and industrial wastewater, the overall removal efficiencies of BOD, COD and SS were 87.6%, 74.5% and 94.0% respectively. When the nightsoil and septage were dumped into the plant, the scum and foaming problems occurred at each stage of treatment unit. Direct dumping of the septage also induced the DO deficiencies in the aeration tanks, which resulted in a deflocculation problem in the secondary clarifiers. It may be favorite to pretreat it at the nightsoil treatment plant. When the leachate was dumped into the plant, the effluent qualities were highly fluctuating probably due to the presence of the toxic and inhibitory substances in it. It might be necessary to pretreat the raw leachate at the landfill site prior to dumping it into the plant.