Abstract:
본 발명은 멜라민 제조 공장에서 배출되는 폐수를 알칼리 조건 하에서 포기하여 암모니아를 포집, 재사용하고, 이후에 산성 조건 하에서 황산알루미늄계 응집제를 사용하여 유기 오염 물질을 응집 작용과 루이스산·염기 형성 작용에 의해 불용화시키고, 이의 침전, 여과 및 처리수를 재사용하는 폐수 처리 방법을 제공한다.
Abstract:
Flexible graphite sheet having embedded ceramic fibers extending from its surfaces into the sheet to increase the permeability of the sheet to resin.
Abstract:
PURPOSE: A treatment method of wastewater discharged during melamine preparing process is provided to facilitate design and engineering of wastewater treatment system and improve economical efficiency by using inexpensive additives and generating few byproducts. CONSTITUTION: Ammonia is removed from wastewater by aeration under an alkaline condition. Organic pollutants in the wastewater are coagulated by using aluminum sulfate cohesive agent under an acidic condition. Then, the organic pollutants are settled. For the aluminum sulfate cohesive agent, aluminum sulfate, alum or mixture thereof can be used. The treated wastewater may be neutralized using caustic lime.
Abstract:
본 발명은 오염수를 공기와 함께, 석회석이 충진된 충진탑을 통과시키는 단계와, 불용화된 침전물을 침전시키고 상등액을 분리막을 통과시켜 여과시키는 단계로 이루어지는, 오염수에서 중금속을 제거하는 방법 및 이러한 방법을 수행하는데 적합한 장치에 관한 것이다.
Abstract:
PURPOSE: Provided is a method for simultaneously extracting hydrocarbon using organic solvents during cultivation of microalgae, thereby extracting and recovering hydrocarbon in higher yield. CONSTITUTION: Hydrocarbon is characteristically produced by using a two-stage extractor consisting of a bubble column reactor and two-phase separating tank. The method for simultaneously extracting hydrocarbon using organic solvents during cultivation of microalgae comprises the steps of: supplying a culture medium from the bubble column reactor(1) to the two-phase separating tank(2) containing an organic solvent layer at a constant flow rate using a pump; recycling the culturing medium from the two-phase separating tank(2) to the bubble column reactor(1) through the organic solvent layer, wherein the hydrocarbon is extracted when passed through the organic solvent layer; and the organic solvent is alkane nonpolar solvent such as octane.
Abstract:
PURPOSE: A process for preparing barium titanate powder by the hydrothermal reaction of a titanium organic metal compound with a barium salt is provided which gives the superfine barium titanate powder at a relatively low temperature. CONSTITUTION: A process for producing a stoichiometric quantity of barium titanate useful in the field of electronics comprises the steps of diluting a titanium 2-alkoxyethoxide precursor in an organic solvent, forming a barium-titanium complex by mixing with an aqueous solution of a barium salt, carrying out hydrothermal reaction after addition to a concentrated alkali solution at a pH higher than 14, and purifying through washing processes. The process can produce the title compound with a uniform particle size without using a high-temperature electric furnace.