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박진식,김동일,한성욱 경운대학교 산업기술연구소 2002 産業技術硏究論文誌 Vol.5 No.1(A)
As a result of VFA_s recovery from food waste for exterior carbon source of denitrification, it can be brought about the resolution below. The phase of acid fermentation of food waste, the slower loading capacity of organic matter, the faster decomposition rate. Between TS and VS, VS was decreased to 6th day fast, and then was decreased slowly. Two days after stating the experiments, SCOD_Cr, SBOD_5, STOC and VFA_S was decreased of increased slowly, and increased fast. And after showing the highest density, it was tended to decreased fast. In this study, because of pH controle, CH_4 density was increased continually. When highest density in the acquisition of VFA, R_8 was 72.2g. R_5 only cut was highest generation. At the time of SBOD_5 with the highest density, at SBOD_5 : ST-N ratio, R_8 was 319 : 1. After studying SBOD_S : ST-N ratio and SBOD_S/SCOD_Cr ration, as a carbon source of biological denitrification it was profitable composition ratio.
박진식,문추연,김동일 경운대학교 산업기술연구소 2001 産業技術硏究論文誌 Vol.3 No.2(B)
In this study, Activated Sludge was operated for treatment of cosmetic wastewater and combined with sewage The results from this study are follows. During the experiments, average COD and BOD concentrations of raw wastewaters were ranged 690∼1,010 ㎎/l, 550 ∼ 880㎎/l respectively, and fluctuated sharply with time. COD removal efficiency was 73.6% at HRT 12hr. It is higher removal efficiency than HRT 4hr 62.6%, HRT 8hr 69.4% when cosmetic wastewater combine with sewage, COD and BOD removal efficiencies were higher than wastewater only, therefore treatment of combined sewage was effective.
박진식,문추연 경운대학교 산업기술연구소 2001 産業技術硏究論文誌 Vol.3 No.2(C)
Recently in Korea and developed countries, nitrogen and phophorus removal are the main target to improve effluent qualities, in order to protect discharge basins from eutrofication by N and P. Introduction of an advanced treatment function to existing wastewater treatment systems, which can be removed nitrogen and phophorus as well as BOD, COD and SS, have been required to protect water resources from domestic and industrial wastewaters. This study was undertaken to investigate the organic matter and nutrient removal efficiencies and the operating parameters for treatment of municipal wastewater by using laboratory scale BNR(Biological nutrient removal) process. The average removal efficiencies of BOD and COD were 91.7% and 81.9% respectively. The nutrient removal efficiencies were NH4-N 96.2%, T-N 67.8%, PO4-P 72.2% and T-P 70.7%, respectively.
초기 함수율 조절이 음식물쓰레기의 발효사료화에 미치는 영향
박진식,정경원,김수생 동아대학교 환경문제연구소 2000 硏究報告 Vol.23 No.1
The purposes of this study were to determine the optimum fermentation process for the feed production of garbage and estimate the practical value of fermented feed using kudzu creeper and sawdust as bulking agent. This study considered initial moisture contents, control as the fermentation process variables. The results are summarized as follows. To, solve the dewatering and sanitary problems and maintain the proper moisture contents and aerobic condition, this garbage fermentation process used kudzu and sawdust as bulking agent. The effective fermentation could be achieved at the moisture contents of 60% with bulking agent. Optimum condition of fermentation consists of moisture contents. For optimum fermentation of gravitationally dewatered garbage, the proper mixing ratios of kudzu(moisture contents : 17.3%) and sawdust (moisture contents : 13.2%) were 41% and 39%. respectively.