Abstract:
이 발명은 수질오염원으로서 큰 부분을 차지하는 생활하수 및 유기성 오·폐수를 산화구법에 처리하여 방류수 수질기준에 적합한 처리수가 되도록 처리함에 있어 질소 및 인화합물을 제거하는 방법에 관한 것으로 유입되는 하수 및 유기성 오·폐수중의 고형 협잡물으 제거하고 균등화를 기준하는 전처리 공정과, 산화구에서 생물학적 반응으로 질산화 반응과 탈질, 탈인반응의 각 공정을 동시에 수행하는 오·폐수를 침전조로 유입 일정시간 정지하여 침전분리시킨 후 상당수는 소득 방류하고 침전된 슬럿지는 탈수기에서 고액 분리하여 발생된 슬럿지 케이크는 부분적 미생물제제를 투입하여 퇴비화하도록 하여 산화구의 부분적 생물학적 질소 및 인 제거방법으로서 BOD 제거반응과 탈질, 탈인반응이 단일조에서 달성할 수 있으며, 설비구성이 단순하� � 운전관리비가 저렴한 것이다.
Abstract:
이 발명은 환경오염원으로서 큰 부분을 차지하는 사람의 분뇨 및 가축의 분뇨 등 기타 고농도 유기성 오·폐수를 액상 부식법의 처리과정에서 처리되지 않는 TN, TP, BOD, COD 제거 수질검사기준에 적합한 처리수가 되고 여기에서 발생된 탈수 케이크는 양질의 유기비료로 만들어 유기농법이나 토양개량제로 재활용하도록 하는 액상부식법에 의한 고농도 유기성 오·폐수의 TN, TP, COD 제거방법 및 퇴비화 방법에 관한 것으로 유입된 유기성 오·폐수를 일정기간 동안 액상부식조내에 체류시키면서 반응시키므로 유입수량, 수질 등의 부하 변동에 민감하지 않고 고농도 유기성 오·폐수를 일정기간 동안 폭기하여 함유된 각종 오염물질을 산화분해시키고 일정시간 동안 수중 교반하는 동시에 산화질소 또는 질소가스로 환원시켜 대기중에 방출한 후 다음공정으로 이송하여 PH조정과 응집제를 투입 응집반응시켜 TP와 잔존 COD를 제거하고 멸균처리 방류하는 과정을 1일 주기로 반복하도록 하는 것이다.
Abstract:
A cold mix asphalt paving concrete composition for road pavement using waste asphalt concrete is provided to heighten pavement strength and to have the capacity to prevent plastic deformation and fatigue cracks by restoring viscosity and improving properties of crushed waste asphalt concrete using recycled additives and modifiers. A cold mix asphalt paving concrete composition for road pavement using waste asphalt concrete is manufactured by crushing waste asphalt concrete using a crusher, sorting the crushed waste asphalt concrete according to particle size using a sorter and weighing, conveying the weighed waste asphalt concrete in an asphalt plant and mixing 100 weight percent waste asphalt concrete with 1~17±5 weight percent recycled additives, 1~13±5 weight percent modifiers, 10~100 weight percent natural aggregate, 1~10 weight percent fillers, 1~10 weight percent cement and 1~20 weight percent straight asphalt, wherein recycled additives having 15~40 carbon atoms, 7~96 cSt kinematic viscosity at 40°C and a pour point of -15~-40°C are used as the recycled additives to restore viscosity and to improve properties of waste asphalt concrete, and synthetic polymeric modifiers manufactured with irregular copolymers of 10~75 weight percent butadiene polymer and 10~25 weight percent styrene polymer are used as the modifies to prevent crack formations and to improve elasticity.
Abstract:
PURPOSE: Provided is an SBR(Sequencing Batch Reactor) system for reducing sludge production. In the SBR system, sludge produced in SBR is stored in a tank, and aerobic bacteria are inoculated into the sludge for decomposing organics of sludge in the aerobic and anoxic conditions. And residual sludge is mixed with oxidant for oxidation of sludge. Continuously oxidized sludge is recycled to SBR as organics and carbon sources of denitrification and phosphorus removal. Consequently sludge volume of SBR is reduced efficiently. CONSTITUTION: The system is characterized by the following steps: (a) discharging sludge produced in SBR at idle process of SBR; (b) storing sludge in the tank; (c) inoculating aerobic bacteria into the sludge and mixing the sludge with oxidant; and (d) recycling the sludge to SBR. Recycled sludge is used as organics and carbon sources for denitrification and phosphorus removal.
Abstract:
PURPOSE: A merged purification process for advanced sewage treatment using three stage contact aeration is provided, which can treat nitrogen and phosphorus contained in sewage stably and economically by purge control. The system has no settling tank by drastically reducing sludge generation as well as reduces various contaminants by activating Bacillus sp, Monas sp, Boda sp, Pseudomonas sp, and so on in each contact aeration tank. CONSTITUTION: The advanced sewage treatment system consists of a screen (11), a grit chamber (12), an anaerobic contact tank (13), a flow control tank (14), a contact aeration tank (15), an anoxic contact tank (16), an N2 gas emission tank (17), a filtration tank (18) and a sterilizing tank (19). The contact aeration tank (15) can be partitioned into one stage to three stages variably and selectively according to water quality. New strain Bacillus khr-10-mx and complex strain khr-5-mx are seeded to each contact aeration tank and dominantly activated for removing various organic contaminants, nitrogen and phosphorus.
Abstract:
PURPOSE: A process for removing nitrogen and phosphorus in advanced treatment of livestock wastewater and excrements is provided to biologically remove varieties of pollutants such as nitrogen and phosphorus causing eutrophication of lakes and marshes, rivers and the sea, and a sludge reduction system thereof is provided. CONSTITUTION: In a method for removing nitrogen and phosphorus in advanced treatment of livestock wastewater and excrements, and a sludge reduction system thereof, the advanced treatment method of livestock wastewater and excrements comprises a first treatment process of pretreating livestock wastewater and excrements, wherein collected wastewater is injected into a hopper(101) and passes through a screen(102) and a grit chamber(103), the wastewater passing the screen(102) and the grit chamber(103) is solid-liquid separated in a centrifugal separator(104) and injected into a storage tank(105); a second treatment process in which a certain amount of the homogenized wastewater is transferred from the storage tank(105) to a pre-liquid humus tank(106), a certain amount of wastewater passing the pre-liquid humus tank(106) is flown into a principal liquid humus tank(107) for performing biological aerobic/anoxic reaction before some of the wastewater is circulated into the pre-liquid humus tank(106); a third treatment process in which the wastewater completing biological reaction in the liquid humus tanks(106,107) is transferred to a mixing tank(108) where it is stored for a certain period of time, the wastewater passing the mixing tank(108) is transferred into a coagulation tank(109) for chemical precipitation treatment of impurities, a wastewater from the coagulation tank(109) is solid-liquid separated in a dehydrator(110); and a fourth treatment process in which the wastewater solid-liquid separated in the dehydrator(110) is supplied into a neutralization tank(101) for pH adjustment, suspended solids are removed from the pH adjusted wastewater in an up flow type filter(112), various pollutants are removed from the suspended solid removed water in a bio contact filter tank(113), pollutants are removed from a disk filter(114) on which a microfilter is mounted, the water passing the disk filter(114) is transferred to an ozone contact tank(115) for sterilization and COD removal, and a resulting water is supplied into an activated carbon adsorber(116) for advanced treatment of colors and pollutants such as heavy metals before being finally discharged through an effluence tank.
Abstract:
PURPOSE: A sanitary landfill early stabilization method and a construction method of vertical leachate barrier according to the same are provided to effectively and promptly decompose wastes and contaminants in a landfill within a short time using new strain microorganisms having superior decomposition power and prevent outflow of leachate by using the vertical leachate barrier. CONSTITUTION: In a sanitary landfill early stabilization method and a construction method of vertical leachate barrier according to the same, the sanitary landfill stabilization method comprises the steps of injecting at least one or more strains selected from the group consisting of new strain microorganism Bacillus khr-10-mx, Cellulomonas khr-15-mx and composite strain khr-5-mx in an amount of 50 to 1000 g/hr per one air supply/exhaust tube well(11) by connecting compressor unit(12), booster unit(14), new strain and nutrients supply unit(16) and gas treatment unit(17) to air supply/exhaust tube wells(11) having a waste landfill depth after dividing the sanitary landfill into a certain cell; adjusting injection composition for the nutrients so that a ratio of TOC:TKN:P is 100:10 to 5:5 to 1; rapidly stabilizing dominant activation of the new strain microorganisms by maintaining pressure of air in the sanitary landfill to 0.05 to 0.5 bar; and safely treating LFG in the gas treatment unit(17) by passing LFG produced in the stabilization step through a condenser(13), wherein a controller automatically controls the compressor unit(12), booster unit(14), new strain and nutrients supply unit(16) and gas treatment unit(17) according to values detected from a sensor of a sanitary landfill monitoring tube well(15), and the construction method of vertical leachate barrier comprises the steps of installing a sanitary landfill surface sealing sheet(19) for excluding rainwater from the sanitary landfill; and selectively installing sheet pile or grouting pile as the vertical leachate barrier(18) for blocking outflow of leachate.