Abstract:
PURPOSE: A high speed production method of hydrogen using a granulated thermophilic strain mixture is provided to enlarge a stirring effect through inner circulation and to constantly maintain a pH value in a reactor, thereby continuously reducing hydraulic retention time (HRT) and to maximize hydrogen production speed. CONSTITUTION: A high speed production method of hydrogen using a granulated thermophilic strain mixture comprises the steps of: heating sludge of a digester, sewage sludge, or soil at high temperature and preparing a strain mixture including hydrogen-producing bacteria; culturing the strain mixture in a continuous stirred tank reactor (CSTR); adding the mixture strain into an expanded granular sludge bed digestion (EGSB) and granulating the strain mixture; adding a substrate to the EGSB; adding nutrients and a buffer solution to the EGSB; and performing fermentation in the EGSB and obtaining hydrogen. The nutrients increase the size of granules of the strain mixture. The buffer solution maintains the EGSB at pH 5-6.
Abstract:
PURPOSE: A method for producing lactic acid using a continuous anaerobic reactor containing granular lactic acid bacteria sludge is provided to reduce the volume of a reaction tank by short HRT(Hydraulic Residence Time), to enhance a production rate, and to continuously produce the lactic acid without additional culture or change of microorganisms. CONSTITUTION: A method for continuously producing lactic acid comprises: a step of culturing anaerobic digester sludge in a reactor and obtaining lactic acid bacteria containing Bacillus sp. and Lactobacillus sp.; a step of adding the lactic acid bacteria to the continuous anaerobic digester sludge and granulating; a step of adding a substrate to the continuous anaerobic digester sludge; and a step of fermenting and obtaining lactic acid. The lactic acid is obtained at 50-60 deg. C and at pH 4.5-5.
Abstract:
PURPOSE: A method for biologically preparing hydrogen using organic waste is provided to treat food waste in an eco-friendly method. CONSTITUTION: A method for biologically preparing hydrogen using organic waste comprises: a step of pulverizing the organic waste; a step of fermenting the waste under an anaerobic dark fermentation condition to prepare a first fermentation containing lactic acid; a step of isolating the first fermentation into a solid phase and a liquid phase; a step of putting the liquid phase into a photoreactor; a step of seeding hydrogen-producing bacteria to the liquid phase materials; and a step of fermenting the liquid phase materials under an anaerobic light fermentation condition. The organic waste is food waste. The hydrogen producing bacteria are Rhodopseudomonas sphaeroides KD131. [Reference numerals] (AA) Food waste 20-50 g carbo.COD/L pH=5.5; (BB) Lactic acid fermentation(glucose conversion efficiency: 80%); (CC) Photosynthesis fermentation(Rhodobacter sphaeroides KD131)
Abstract:
PURPOSE: A method for producing hydrogen using condition-optimized Rhodobacter sphaeroides KD131 is provided to maximize hydrogen productivity. CONSTITUTION: A method for producing hydrogen using Rhodobacter sphaeroides KD131 comprises a step of culturing Rhodobacter sphaeroides KD131 using succinate as a carbon source and (NH_2)_4SO_4 or glutamate as a nitrogen source. The initial concentration and pH of the bacteria is 0.45 g dcw/l-0.67 g dcw/l and pH 6-7.
Abstract:
PURPOSE: An energy effective device for removing volatile organic compound and a method thereof are provided to prevent the generation of contamination. CONSTITUTION: A method for removing volatile organic compound comprises: a step for adsorbing volatile organic compounds supplied from an adsorption zone having an adsorbing device(120) into a rotary adsorption plate(110), a step for detaching the volatile organic compounds from the adsorption plate and recycling the volatile organic compounds, a step of cooling the adsorption plate, a step of burning the concentrated volatile organic compounds, and a heat-exchange step for heating the recycled air using heat. [Reference numerals] (AA) Cooling air; (BB) Volatile organic compound; (CC) Polluted air; (DD) Heat exchanged high temperature regenerated air; (EE) Waste heat air; (FF) Clean air; (GG) Rotary motor
Abstract:
PURPOSE: A method for producing biological ethanol using organic waste is provided to enhance ethanol production efficiency and to save costs. CONSTITUTION: A method for producing ethanol from organic waste by a complex process using fermentation and a catalyst comprises: a step of pulverizing the organic waste and preparing pulverized waste; a step of fermenting the pulverized waste under an anaerobic environment and preparing a fermentation-containing lactic acid; a step of separating the fermentation into solid and liquid phase materials and adding the liquid phase material into a reactor; a step of collecting lactate from the liquid phase material, which is adsorbed in an acid form; and a step of eliminating the collected lactate. The organic waste is food waste. [Reference numerals] (AA) Organic waste(food waste, sewage sludge); (BB) Lactic acid fermentation; (CC) Concentration and extraction; (DD) Methane digestion; (EE) Supplying a heating source
Abstract:
본원은 반투과막이 구비된 생물반응기(bioreactor) 중에서 미생물을 배양하는 단계를 포함하며, 상기 막은 상기 미생물은 통과시키지 못하지만, 상기 반응기 중의 배양액은 통과시킬 수 있으며, 상기 배양액 중의 기질의 농도는 상기 반응기 중의 상기 미생물의 농도에 맞추어 조절되는 것인, 반투과막을 이용한 미생물 배양방법을 개시한다. 본원에 따른 반투과막을 이용한 미생물 배양방법은 고농도 배양 및 최적 운전을 통한 연속적 바이오매스의 획득이 가능하여, 미생물을 이용한 유용물질의 생산 예를 들면 박테리아의 지방산 생산 성능을 획기적으로 증가시킬 수 있다.