Abstract:
A toxicity evaluation device and method are provided to evaluate toxicity of sewage, waste water and chemical substances by measuring the amount of oxygen produced by photosynthesis of algae, and reduce the costs for evaluation. The toxicity evaluation device comprises: an algae storage tank(11) for mixing and incubating the cultured algae and toxic materials, and supplying nitrogen into the mixture to maintain dissolved oxygen below a certain amount; a reactor(1) for receiving the mixture from the algae storage tank and generating oxygen from the mixture by supplying a light; a constant temperature circulator(13) for supplying water of constant temperature to the reactor; and a magnetic bar stirrer(18) for stirring the reactor with a magnetic bar(2), wherein the reactor contains an illuminator(12) for supplying the light to the mixture, and a photodetector(10) installed opposite to the illuminator for detecting the light from the illuminator. The dissolved oxygen of the algae storage tank is maintained below 1.5 ppm.
Abstract:
본 발명은 바이오매스 표면에 흡착된 금속이온을 바이오매스로 환원시켜 금속나노입자를 생성시키는 금속 나노입자의 제조방법에 관한 것이다. 본 발명은 바이오매스를 통한 금속이온의 흡착과 바이오매스 표면 또는 내부에 존재하는 환원물질에 의해 금속이온을 환원시키므로 별도의 환원제 등 화학물질을 사용하지 않아 친환경적, 경제적 및 인체에 무해한 방법으로 금속나노 입자를 제조할 수 있다.
Abstract:
본 발명은 대장균 바이오매스의 표면에 아민기 함유 폴리머가 가교되어 음이온성 오염물질에 대한 흡착성능 및 친화도가 향상된 표면개질된 바이오매스의 제조방법 및 이에 의한 생체흡착제에 관한 것으로, 본 발명의 표면개질된 대장균 바이오매스의 제조방법은 비건조된 슬러리 상태의 바이오매스를 직접 사용할 수 있으므로 균체 건조 공정을 생략할 수 있고 또한 용매를 추가로 첨가할 필요가 없으므로 경제적이며 환경친화적이다. 아민기 함유 폴리머, 대장균, 바이오매스, 음이온성 오염물질, 생체흡착제
Abstract:
An effective method is provided to improve adsorption performance of the dyes through the chemical modification of functional groups on a surface of the biomass according to the adsorption mechanism of the biomass and dyes when using a corynebacterium glutamicum biomass as biosorbents. In a preparation method of a biosorbent that is applied to dyestuff wastewater and removes the dyes by adsorbing dyes causing color, a preparation method of a biosorbent having enhanced adsorption performance by chemical modification of functional groups on a surface of a corynebacterium glutamicum biomass comprises the steps of: treating the corynebacterium glutamicum biomass with an acid to hydrogenate the corynebacterium glutamicum biomass, washing the hydrogenated corynebacterium glutamicum biomass with distilled water, and drying the washed corynebacterium glutamicum biomass; and chemically modifying the hydrogenated biomass through an ester reaction to remove a carboxyl group, washing the chemically modified hydrogenated biomass with distilled water, and drying the washed biomass. The step of removing the carboxyl group is performed by dispersing the hydrogenated biomass into a methanol solution, adding nitric acid as an acid catalyst into the dispersion, and agitating the mixed solution to perform an ester reaction.
Abstract:
PURPOSE: A chitosan-biomass complex containing bacteria biomass in chitosan is provided to improve adsorption performance and to be easily applied to a process. CONSTITUTION: A chitosan-biomass complex is prepared by supporting bacteria biomass in chitosan. The complex contains amine group-containing cationic polymers which are cross-linked on the surface of the complex. The complex also contains amine group-containing cationic polymers having the bacteria biomass which is cross-linked on the surface. The bacteria include Corynebacterium ammoniagenes, Corynebacterium glutamicum, Escherichia coli, Bacillus megatherium, Serratia marcescens, or Brevibacterium ammoniagenes. A method for preparing the complex comprises: a step of stirring a mixture containing the bacteria biomass, chitosan, and acid solution; and a step of curing the mixture by applying an alkaline solution.
Abstract:
본 발명은 바이오매스 표면에 흡착된 금속이온을 바이오매스로 환원시켜 금속나노입자를 생성시키는 금속 나노입자의 제조방법에 관한 것이다. 본 발명은 바이오매스를 통한 금속이온의 흡착과 바이오매스 표면 또는 내부에 존재하는 환원물질에 의해 금속이온을 환원시키므로 별도의 환원제 등 화학물질을 사용하지 않아 친환경적, 경제적 및 인체에 무해한 방법으로 금속나노 입자를 제조할 수 있다.
Abstract:
본 발명에 의한 양이온성 오염물질 제거용 생체흡착제는 발효폐기물인 코리네박테리움 글루타미쿰 바이오매스의 표면에 추가로 결합된 카르복실기, 술폰산기 및 인산기 중 하나 이상을 가지는 화합물을 포함하여 바이오매스의 흡착능력이 증대된 양이온성 오염물질 제거용 생체흡착제이다. 본 발명에 의한 양이온성 오염물질 제거용 생체흡착제는 원료 바이오 매스에 비해 염기성 염료를 효과적으로 제거할 수 있고, 또한 흡착성능 및 친화도가 매우 증가하였다. 코리네박테리움 글루타미쿰, 바이오매스, 양이온성 오염물질, 생체흡착제
Abstract:
PURPOSE: The bio absorption by the manufacturing method of the Escherichia coli biomass which is surface modified and this. Since recycling the fermentation waste, it is environment-friendly and it is economic. And it widely can utilize as the cheap material replacing the existing overhead absorber. CONSTITUTION: The manufacturing method of the Escherichia coli biomass which is surface modified is as follows. Step of mixing the Escherichia coli biomass and amine radical containing polymer of the slurry state. The step that the cross-linking agent is added to the harsh mixture and reacting the mixing step. Step of being solution separated the harsh mixture high-and obtaining the Escherichia coli biomass in which the amine radical containing polymer is combined in the surface reaction step.
Abstract:
PURPOSE: A preparation method of a surface-modified biomass and biosorption thereof are provided to be environmentally-friendly by recycling fermentation waste. CONSTITUTION: A preparation method includes next steps. A dried bacteria biomass is added to the cationic polymer solution and is reacted. A cross-linking agent is added to the bacteria biomass and the amine radical-containing cationic polymer solution and is reacted. An acid catalyst is added after putting the biomass passing the reaction step into the alcohol and is reacted. A mixture after passing the reaction step is separated, washed, and dried.
Abstract:
본 발명에 의한 양이온성 오염물질 제거용 생체흡착제는 발효폐기물인 코리네박테리움 글루타미쿰 바이오매스에 존재하는 아미노기의 수소가 알킬기, 사이클로알킬기 및 아릴기 중 하나 이상으로 치환된 생체흡착제이다. 본 발명에 의한 양이온성 오염물질 제거용 생체흡착제는 원료 바이오 매스에 비해 넓은 pH범위에서 염기성 염료를 효과적으로 제거할 수 있고, 또한 흡착성능 및 친화도가 매우 증가하였다. 코리네박테리움 글루타미쿰, 바이오매스, 양이온성 오염물질, 생체흡착제