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.
Abstract:
PURPOSE: A sequencing batch reactor process for treating sewage/wastewater with decreased sludge production is provided, which is characterized in that sludge volume of sequencing batch reactor is maintained regularly by self-oxidation and solubilization of sludge. And sludge is recycled as carbon source. CONSTITUTION: The system includes first step for removing adulteration of sewage/wastewater by screen(10); second step for removing micro material or remaining adulteration by grit chamber(12); third step for mixing and controlling flowrate of sewage/wastewater; forth step for biological reaction of wastewater in a pre-sequencing batch reactor(14) and a primary sequencing batch reactor(15); fifth step for settling sludge for 30-60 minutes; sixth step for discharging supernatant water for 30-60 minutes by decanter; seventh step for idling for 3 to 5 minutes; eighth step for filtering micro suspended solids of supernatant water; ninth step for disinfection and discharging treated water; tenth step for solubilization of sludge in solubilization tank(17); and eleventh step for supplying solubilized sludge into the pre-sequencing batch reactor(14) and the primary sequencing batch reactor(15) as carbon source.
Abstract:
PURPOSE: A system for detecting water leakage and damaged position of water cut sheet and repair and maintenance method is provided to prevent environmental contamination by rapidly detecting and repairing the damaged portion of water cut sheet. CONSTITUTION: A system comprises a single liner(8) or a double liner arranged onto a water cut layer constructed on the ground of a waste disposal area; a constant current feed unit(1); a first feeder electrode(2) and a second feeder electrode for feeding the current supplied from the constant current feed unit, to the water cut sheet and a protection layer(23) of the waste disposal area; sensors(6) interposed between the single liner and the double liner, and which are operated by the current supplied from the constant current feed unit and generate electric potentials in response to the water leaking through the damaged portion of the single liner or the double liner; a control box(4) connected to sensors through a cable(5), and which checks electric potentials of sensors; and a host computer(21) having an Internet scripter and a user graphic interface for displaying the damaged position of the water cut sheet of the water disposal area. An automatic alarm system operates immediately upon occurrence of damage to the water cut sheet or layer, so as to generate an alarm to the host computer and a terminal of an administrator. The detected data is transmitted, in a real time basis, to the host computer and stored therein.
Abstract:
PURPOSE: A method for the rapid stabilization of landfill site and vertical linear system for the same are provided to prevent leachate overflow by vertical linear system and increase decomposition rate of wastes and chemical compounds by using strain microorganisms, thus stabilize sanitary landfill site in a short period of time. CONSTITUTION: The method includes the steps of dividing a landfill site into several landfill zone to install air supply/leachate drainage wells(11); injecting at least one strain microorganisms selected from the group consisting of Bacillus khr-10-mx, Cellulomonas khr-15-mx, khr-5-mx in an amount of 50 to 1000 mg/L· day per an air supply/leachate drainage well; adjusting nutrients ratio inside landfill site (TOC : TKN : P is 100 : 10 to 5 : 5 to 1); and transferring land fill gas (LFG) generated from above rapid stabilization process through a condenser(13) to a gas treatment device(17). The vertical linear system comprises a cover sheet(19) for sealing the surface of landfill site from atmosphere to maximize air supply efficiency; a rainwater drainage system; and sheet piles or grouting piles.
Abstract:
[과제] 종래의 기술보다 본 발명은 축산폐수 및 분뇨에 포함된 광범위 살균성 항생제 및 방역용 소독제 등이 다량으로 포함되어 생물학적으로 필요한 각종 미생물의 증식 및 활성화를 방해하여 처리효율을 감소시키고 처리시간을 길게 요구하는 등, 종래 기술의 구조적 제약 조건과 많은 에너지 소모를 해결하기 위한 방법으로, 항생제와 소독제에 내성이 우수한 신균주 미생물을 접종, 우점적 활성화와 퍼지제어로부터, 적정한 용량의 시설과 짧은 시간에 질소 및 인등의 영양염류 뿐만아니라 각종 유기성 오염 물질을 동시에 제거하는 생물학적 고도처리 기술을 제공한다. [해결수단] 본 발명은 액상부식법에 있어서 축산폐수 또는 분뇨의 질소 및 인을 제거하는 방법에 관한 것으로서, 액상부식조의 각종 센서 및 퍼지측정장치와 연동된 퍼지제어시스템(Fuzzy Control System)을 이용하여 최적의 운전 조건을 유지하고, 고농도 축산폐수 또는 분뇨에 포함된 광범위 살균성 항생제와 방역용 소독제 등이 다량 포함되어 각종 미생물의 증식 활성화를 저해하고 처리효율을 감소시키는 것으로, 이것을 해결하기 위하여 광범위 항생제와 방역용 소독제에 내성이 우수한 신균주 Bacillus khr-10-mx(한국과학기술연구원 유전자은행 기탁번호 KCTC 8533P)와 복합균주 khr-5-mx(한국과학기술연구원 유전자은행 기탁번호 KCTC 0078BP)에 포함된 산화미생물, 질화, 탈질미생물 및 바이오-인(Bio-P) 미생물, 생물고분자 응집제를 생산하는 미생물 등을 접종하고, 호기성 폭� ��(Air-on/off) 및 무산소 수중교반 (Mixer-on/off)을 교대로 실시하면서 산소공급량, 폐수의 유입수량과 배출수량을 자동조절하여 생물학적 액상부식을 수행한 후, 응집반응조에서 무기 및 유기 응집제를 첨가하여 고액분리한 후 침전, 여과처리 하여 소독 방류하는 것을 특징으로 하는 본 발명의 방법에 따르면, 고농도 축산폐수 및 분뇨중의 유기오염 물질과 질소와 인을 효율적으로 제거할 수 있다.