KR20040035634A - Livestock wastewater treatment system attached the biological treatment and a membrane and an electrolysis tank - Google Patents
Livestock wastewater treatment system attached the biological treatment and a membrane and an electrolysis tank Download PDFInfo
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- KR20040035634A KR20040035634A KR1020040022755A KR20040022755A KR20040035634A KR 20040035634 A KR20040035634 A KR 20040035634A KR 1020040022755 A KR1020040022755 A KR 1020040022755A KR 20040022755 A KR20040022755 A KR 20040022755A KR 20040035634 A KR20040035634 A KR 20040035634A
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Abstract
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본 발명은 고액분리를 위한 데칸타(3)와 4단 bardenpho process(4)와 PCF(6) 와 멤브레인(11)와 전기분해조(13)가 장착된 축산폐수 처리 시스템에 관한 것이다. 축산폐수 처리는 고액분리와 함께 오염 물질인 BOD, SS, T-N, T-P, 색도 등이 제거되어야 한다.The present invention relates to a livestock wastewater treatment system equipped with a decanter (3), a four-stage bardenpho process (4), a PCF (6), a membrane (11) and an electrolysis tank (13) for solid-liquid separation. Livestock wastewater treatment should remove the contaminants such as BOD, SS, T-N, T-P, and chromaticity along with solid-liquid separation.
기존의 생물학적 처리는 산화와 탈질 등의 공정을 거치면서 BOD, T-N, T-P의 제거가 이루어지지만, 미생물의 특성상 알칼리도, PH, 온도, 오염부하 등에 민감한 안정된 수질을 생산하기가 힘든 단점이 있다. 또한 T-N , T-P 의 제거효율이 낮으며, 용해성 고형물질, 미세부유물질의 제거도 힘들다.Conventional biological treatment removes BOD, T-N, and T-P while undergoing oxidation and denitrification, but it is difficult to produce stable water quality sensitive to alkalinity, PH, temperature, and pollutant load due to the characteristics of microorganisms. In addition, the removal efficiency of T-N and T-P is low, and it is difficult to remove soluble solid matter and fine suspended solids.
본 발명에 사용되는 생물학적처리 방법인 5단 bardenpho process(4)는 앞단에 혐기성조가 있고, 무산소조와 산소조가 2단씩 교대로 있어 산소조에서는 질산화 미생물이 산소를 전자 수용체로 이용하여 에너지를 생산하고 그 에너지를 세포합성에 쓴다.산소조는 에너지를 생산하는 단계로 유기성 질소와 암모니아성 질소를 NO2, NO3 화합물로 산화 시키고, 세포합성 시 유기성 질소와 암모니아성 질소를 소비하여 제거하며, 미생물의 인의 과잉섭취가 일어난다. 혐기성조는 반송된 미생물의 인의 과잉방출로 인이 제거된다. 후단의 산소조로 인해 미생물의 인의 재방출을 막는다. NO2, NO3 화합물은 무산소조로 반송되어 혐기성 상태가 된 미생물이 산소대신산소결합체인 NO2, NO3를 사용하여 탈질이 일어나 결국 질소를 제거 하게 된다. 남은 잔여 질소와 다시 두번째 무산조와 산소조를 통과하면서 제거된다. 5단 bardenpho process(4)에서 질소와 인이 제거된 슬러지는 슬러지 침전조(5)에서 침전시켜 5단 bardenpho process(4)로 반송된다.The 5-stage bardenpho process (4), which is a biological treatment method used in the present invention, has an anaerobic tank at the front end, and an oxygen-free tank and an oxygen tank are alternately arranged in two stages. In the oxygen tank, the nitrification microorganism produces energy by using oxygen as an electron acceptor. Oxygen tank is a step of producing energy, oxidizing organic nitrogen and ammonia nitrogen into NO2, NO3 compounds, consuming organic nitrogen and ammonia nitrogen during cell synthesis, and overingesting phosphorus of microorganism Happens. The anaerobic tank removes phosphorus due to excessive release of phosphorus from returned microorganisms. The oxygen tank at the back prevents the re-emission of phosphorus by microorganisms. NO2 and NO3 compounds are returned to the anaerobic tank, and the anaerobic microorganisms are denitrified using NO2 and NO3, which are oxygen-combining compounds, and finally remove nitrogen. Remaining nitrogen is removed as it passes through the second anaerobic and oxygen baths. In the 5-stage bardenpho process (4), nitrogen and phosphorus-free sludge is precipitated in the sludge settling tank (5) and returned to the 5-stage bardenpho process (4).
이 공정은 고액분리라는 전처리가 필요하다. 본 발명에서는 데칸타(3)를 이용하여 고액분리를 위한 전처리를 실행한다.This process requires pretreatment called solid-liquid separation. In the present invention, the decanter (3) is used to carry out a pretreatment for separating solids.
생물학적 처리를 거친 원수로 공급펌프(8)로 이송된다. 멤브레인(11)의 처리효율을 높이기 위한 전처리로 PCF(PRE COAT FILTER(6)장치를 사용한다. PCF(6)는 규조토 등 축산폐수에 적합한 세라믹을 이용해 5단 bardenpho process(4)에서 제거하지 못한 미세 부유물질을 0.5㎛까지 제거한다. PCF(6)의 처리수는 농축조(7)에 공급된다.The biologically treated raw water is transferred to the feed pump 8. PCF (PRE COAT FILTER (6) device is used as pretreatment to increase the treatment efficiency of membrane 11.) PCF (6) cannot be removed in 5-stage bardenpho process (4) by using ceramic suitable for livestock wastewater such as diatomaceous earth. The fine suspended matter is removed to 0.5 mu m The treated water of the PCF 6 is supplied to the concentration bath 7.
멤브레인(11)에서는 BOD, SS, T-N, T-P, 색도 등 오염물질의 제거율이 99 % 이상에 달한다. 멤브레인(11)에서 처리수를 계속 생산하면 원수의 삼투압이 증가해 생산 후 수량이 점차 떨어지게 되면 원수의 오염물질과 함께 TDS 농도도 함께 상승한다.In the membrane 11, the removal rate of contaminants such as BOD, SS, T-N, T-P, and chromaticity reaches 99% or more. As the treated water continues to be produced in the membrane 11, the osmotic pressure of the raw water increases, and when the yield decreases gradually after production, the TDS concentration increases with the contaminants of the raw water.
전기분해조(13)의 처리효율은 TDS와 전기전도도와 정비례한다. 원수의 TDS와 전기전도도가 높을수록 촉매전극과 원수사이의 전기분해가 활발해진다. 그러나 원수의 TDS와 전기전도도의 낮으면 전기분해 효율이 떨어지게 된다.The treatment efficiency of the electrolysis tank 13 is directly proportional to the TDS and the conductivity. The higher the TDS and electrical conductivity of the raw water, the more active the electrolysis between the catalytic electrode and the raw water. However, the lower the TDS and conductivity of raw water, the lower the electrolysis efficiency.
본 발명은 멤브레인(11)과 전기분해조(13)의 단점을 보완하여 안정된 처리수질을 유지할 수 있도록 고안되었다. 멤브레인(11)의 농축수는 농축조(7)로 반송되어 농축조(7)의 TDS와 전기전도도가 약 50%이상 농축시 전기분해조(13)로 원수를 공급한다. 농축된 원수는 공급펌프(12)를 통해 전기분해조(13)로 공급되어 고효율의 전기분해과정을 거치게 된 후 멤브레인(11)의 생산수와 함께 방류 된다.The present invention is designed to compensate for the disadvantages of the membrane 11 and the electrolysis tank 13 to maintain a stable treated water quality. The concentrated water of the membrane 11 is returned to the concentration tank 7 and supplies raw water to the electrolysis tank 13 when the TDS and the electrical conductivity of the concentration tank 7 are concentrated by about 50% or more. The concentrated raw water is supplied to the electrolysis tank 13 through the supply pump 12 and subjected to a high efficiency electrolysis process, and then discharged together with the production water of the membrane 11.
본 발명은 고액분리를 위한 데칸타(3)와 5단 bardenpho process(4)와 PCF(6) 와 멤브레인(11), 전기분해조(13)를 축산폐수의 발생에서부터 처리 후 방류까지의 전 공정을 최대효율의 성능을 내는 시스템으로 구성되어 있다In the present invention, the decanter (3) and the five-stage bardenpho process (4), the PCF (6), the membrane (11), and the electrolysis tank (13) for solid-liquid separation are processed from the generation of livestock wastewater to the discharge after treatment. It consists of a system that produces the highest efficiency performance.
본 발명의 목적은 안정적인 처리수질 및 처리유량을 유지하는 축산폐수 처리시스템의 구성에 그 목적이 있다An object of the present invention is to configure a livestock wastewater treatment system that maintains a stable treatment water quality and treatment flow rate.
1. 원수조1. Raw water tank
2. 공급펌프2. Supply pump
3. 데칸타3. Decanta
4. 5단 bardenpho process4. 5-stage bardenpho process
5. 슬러지 침전조5. Sludge Sedimentation Tank
6. PCF(PRE COAT FILTER)6.PCF (PRE COAT FILTER)
7. 농축조7. Thickener
8. 공급펌프8. Supply pump
9. 마이크로 필터9. Micro filter
10. 고압펌프10. High pressure pump
11. 멤브레인11.membrane
12. 공급펌프12. Supply Pump
13. 전기분해조13. Electrolysis Bath
본 발명은 고액분리를 위한 데칸타(3)와 5단 bardenpho process(4)와 PCF(6)와 멤브레인(11), 전기분해조(13)가 장착된 축산폐수 처리 시스템에 관한 것이다. 축산폐수 처리는 고액분리와 함께 오염 물질인 BOD, SS, T-N, T-P, 색도 등이 제거되어야 한다.The present invention relates to a livestock wastewater treatment system equipped with a decanter (3), a five-stage bardenpho process (4), a PCF (6), a membrane (11), and an electrolysis tank (13) for solid-liquid separation. Livestock wastewater treatment should remove the contaminants such as BOD, SS, T-N, T-P, and chromaticity along with solid-liquid separation.
본 발명은 축산폐수의 발생에서부터 방류까지의 전과정을 일괄적으로 처리하는 시스템에 관한 것으로 데칸타(3)와 5단 bardenpho process(4)와 PCF(6) 와 농축조(7), 멤브레인(11)와 전기분해조(13)를 장착하여 각 공정의 단점을 보완하여 BOD, SS, T-N, T-P, 색도 등의 오염물질 제거율을 최대로 한다.The present invention relates to a system that collectively handles the entire process from generation of livestock wastewater to discharge, and includes a decanter (3), a five-stage bardenpho process (4), a PCF (6), a concentration tank (7), and a membrane (11). Equipped with an electrolysis tank 13 to supplement the disadvantages of each process to maximize the removal rate of pollutants such as BOD, SS, TN, TP, chromaticity.
본 발명에 관하여 데칸타(3)와 5단 bardenpho process(4)와 PCF(6) 와 농축조(7), 멤브레인(11), 전기분해조(13)가 장착된 축산폐수 처리 시스템의 첨부된 도면 1 을참조하여 설명하면 시스템은 원수조(1), 공급펌프(2), 데칸타(3), 5단 bardenpho process(4), 슬러지 농축조(5), PCF(PRE COAT FILTER)(6), 농축조(7), 공급펌프(8), 마이크로 필터(9),고압펌프(10), 멤브레인(11), 공급펌프(12), 전기분해조(13)으로 구성되어 있다.An accompanying drawing of a livestock wastewater treatment system equipped with a decanter (3), a five-stage bardenpho process (4), a PCF (6), a concentrator (7), a membrane (11), and an electrolysis tank (13). 1, the system consists of a feed tank (1), a feed pump (2), a decanter (3), a five-stage bardenpho process (4), a sludge thickener (5), a PCF (PRE COAT FILTER) (6), Concentration tank 7, feed pump 8, micro filter 9, high pressure pump 10, membrane 11, feed pump 12, electrolysis tank 13 is composed of.
본 발명의 축산폐수의 발생에서부터 방류까지의 전과정을 일괄적으로 처리하는 시스템에 관한 것으로 축산폐수를 고액분리하는 데칸타(3)의 운전, 생물학적 처리를 하는 5단 bardenpho process(4)의 운전, 미세 부유물질을 0.5㎛까지 제거하는 PCF(6)운전, 농축조(7)의 내부 농축수의 TDS농도 및 전기전도도가 농축률 약 50% 이하에서의 멤브레인(11)의 운전과 농축조(7) 내부 농축수의 TDS농도 및 전기전도도가 농축률 약 50% 이상에서는 농축수의 일부를 이송하여 전기분해처리를 시작하여 전기분해조(13)의 처리수와 분리막(11)의 생산수가 종합되어 방류된다. 축산폐수 원수를 저장하는 원수조(1)에서 공급펌프(2)는 원수를 데칸타(3)로 공급한다. 데칸타(3)의 내부 스크류가 고속으로 회전하면서 원수 중의 고형물은 스크류를 따라 외부로 배출되고, 원심분리된 액체는 생물학적 처리단계인 5단 bardenpho process(4)로 유입된다.The present invention relates to a system for collectively processing the whole process from generation of livestock wastewater to discharge, operation of decanta (3) for solid-liquid separation of livestock wastewater, operation of 5-stage bardenpho process (4) for biological treatment, PCF 6 operation to remove fine suspended solids up to 0.5 μm, inside of thickening tank 7 Operation of membrane 11 and concentration inside of thickening tank 7 with TDS concentration and electrical conductivity of concentrated water below 50% When the TDS concentration and the electrical conductivity of the brine are about 50% or more, a portion of the brine is transferred to start electrolysis, and the treated water of the electrolysis tank 13 and the production water of the membrane 11 are discharged. . In the raw water tank (1) for storing the livestock wastewater raw water supply pump (2) supplies the raw water to the decanter (3). As the internal screw of the decanter 3 rotates at high speed, the solids in the raw water are discharged to the outside along the screw, and the centrifuged liquid enters the biological treatment step 5 bardenpho process 4.
5단 bardenpho process(4)는 앞단에 혐기성조가 있고, 무산소조와 산소조가 2단씩 교대로 있어 산소조에서는 질산화 미생물이 산소를 전자 수용체로 이용하여 에너지를 생산하고 그 에너지를 세포합성에 쓴다.산소조는 에너지를 생산하는 단계로 유기성 질소와 암모니아성 질소를 NO2, NO3 화합물로 산화 시키고, 세포합성 시 유기성 질소와 암모니아성 질소를 소비하여 제거하며, 미생물의 인의 과잉섭취가 일어난다. 혐기성조는 반송된 미생물의 인의 과잉방출로 인이 제거된다. 후단의 산소조로 인해 미생물의 인의 재방출을 막는다. NO2, NO3 화합물은 무산소조로 반송되어 혐기성 상태가 된 미생물이 산소대신 산소결합체인 NO2, NO3를 사용하여 탈질이 일어나 결국 질소를 제거 하게 된다. 남은 잔여 질소와 다시 두번째 무산조와 산소조를 통과하면서 제거된다. 질산화 탈질 미생물 외의 미생물에 의해 BOD와 SS는 동화작용 및 이화작용으로 CO2 및 에너지, 미생물의 증식에 이용된다. 처리수는 PCF(6)로 공급되고,미생물 SLUGE는 다시 데칸타(3)에서 공급되는 원수와 함께 4단 bardenpho process(4)로 이송되어 생물학적 처리 후 슬러지는 슬러지 침전조(5)에서 침전되어 다시 5단 bardenpho process(4)로 반송된다.The 5-stage bardenpho process (4) has an anaerobic tank at the front end, and an oxygen-free tank and an oxygen tank are alternately arranged in two stages. In the oxygen tank, the nitrification microorganism uses oxygen as an electron acceptor to produce energy and uses the energy for cell synthesis. In the step of producing energy, organic nitrogen and ammonia nitrogen are oxidized to NO2 and NO3 compounds, and during the cell synthesis, organic nitrogen and ammonia nitrogen are consumed and removed, and excessive intake of phosphorus of microorganism occurs. The anaerobic tank removes phosphorus due to excessive release of phosphorus from returned microorganisms. The oxygen tank at the back prevents the re-emission of phosphorus by microorganisms. NO2 and NO3 compounds are returned to the anaerobic tank, and the anaerobic microorganisms are denitrified using NO2 and NO3, oxygen bonds instead of oxygen, and eventually remove nitrogen. Remaining nitrogen is removed as it passes through the second anaerobic and oxygen baths. By microorganisms other than nitrifying and denitrifying microorganisms, BOD and SS are used for the growth of CO2, energy and microorganisms by assimilation and catabolism. The treated water is supplied to the PCF (6), and the microbial SLUGE is transferred to the four-stage bardenpho process (4) together with the raw water supplied from the decanter (3), and the sludge after the biological treatment is precipitated in the sludge settling tank (5) and again. It is returned to the 5-stage bardenpho process (4).
PCF(6)는 규조토 등 축산폐수에 적합한 세라믹을 이용해 5단 bardenpho process(4)에서 제거하지 못한 미세 부유물질을 0.5㎛까지 제거한다. 이런 미세부유물질을 제거함으로써 멤브레인(11)의 운전시 막의 파울링(막힘현상)을 제어하고 수명을 연장시킬 수 있다.PCF (6) uses a ceramic suitable for livestock wastewater, such as diatomaceous earth to remove fine suspended solids up to 0.5㎛ that could not be removed in the five-stage bardenpho process (4). By removing such fine suspended materials, fouling of the membrane during operation of the membrane 11 can be controlled and its life can be extended.
PCF(6)의 처리수는 농축조(7)에 공급된다.The treated water of the PCF 6 is supplied to the concentration tank 7.
농축조(7)에서 원수 공급펌프(8)에 의하여 마이크로 필터(9)로 공급된 원수는 고압펌프(10)에 의하여 멤브레인(11)로 공급된다. 마이크로 필터(9)에서 공급되는 처리수는 멤브레인(11)에 공급되어 처리수와 농축수로 분리된다. 멤브레인(11)의 처리수의 BOD, SS, T-N, T-P, 색도 등의 오염물질을 99% 이상이 제거되 방류수 기준에 적합하다. 멤브레인(11)의 농축수는 농축조(7)로 반송된다. 농축조(7)의 TDS 및 전기전도도의 농축률이 50%이상이 될 때까지 자동 반복된다. 농축률 50%이상이 되면 전기분해조(13)에 원수가 공급된다.The raw water supplied from the concentration tank 7 to the micro filter 9 by the raw water supply pump 8 is supplied to the membrane 11 by the high pressure pump 10. The treated water supplied from the micro filter 9 is supplied to the membrane 11 and separated into treated water and concentrated water. 99% or more of contaminants such as BOD, SS, T-N, T-P, and chromaticity of the treated water of the membrane 11 are removed to meet the effluent standard. The concentrated water of the membrane 11 is returned to the concentration tank 7. The TDS and the electrical conductivity of the concentration tank 7 are automatically repeated until the concentration rate is 50% or more. When the concentration rate is 50% or more, raw water is supplied to the electrolysis tank 13.
전기분해조(13)의 공급펌프(12)는 TDS 및 전기전도도의 농축률이 50% 이상인 원수를 전기분해조(13)에 공급한다. 전기분해조(13)는 촉매전극과 원수사이에 높은 전기전도도로 활발한 전기분해 반응을 하여 원수의 처리효율을 높인다. 전기분해조(13)의 촉매전극에서 발생되는 수소원자와 산소원자에 의하여 오염물질이 제거된다. 원수 속에 농축된 염분은 전기분해장치에서 염소로 변하여 색도제거의 중요한 인자로 작용한다.The supply pump 12 of the electrolysis tank 13 supplies the raw water whose concentration rate of TDS and electric conductivity is 50% or more to the electrolysis tank 13. The electrolysis tank 13 performs an active electrolysis reaction with high electrical conductivity between the catalyst electrode and the raw water to increase the treatment efficiency of the raw water. Contaminants are removed by hydrogen and oxygen atoms generated at the catalytic electrode of the electrolysis tank 13. The salt concentrated in the raw water is converted into chlorine in the electrolysis unit, which acts as an important factor in color removal.
본 발명은 데칸타(3)와 5단 bardenpho process(4)와 PCF(6)와 멤브레인(11), 전기분해조(13)가 장착된 축산폐수 처리 시스템으로 축산폐수의 발생에서부터 처리 후 방류까지 일괄적으로 처리함과 동시에 BOD, T-N, T-P, 색도 제거율 99% 으로 탁월한 효율과 경제성을 지닌다. 생물학적처리 방법인 5단 bardenpho process(4)는 앞단에 혐기성조가 있고, 무산소조와 산소조가 2단씩 교대로 있어 산소조에서는 질산화 미생물이 산소를 전자 수용체로 이용하여 에너지를 생산하고 그 에너지를 세포합성에 쓴다.산소조는 에너지를 생산하는 단계로 유기성 질소와 암모니아성 질소를 NO2, NO3 화합물로 산화 시키고, 세포합성 시 유기성 질소와 암모니아성 질소를 소비하여 제거하며, 미생물의 인의 과잉섭취가 일어난다. 혐기성조는 반송된 미생물의 인의 과잉방출로 인이 제거된다. 후단의 산소조로 인해 미생물의 인의 재방출을 막는다. NO2, NO3 화합물은 무산소조로 반송되어 혐기성 상태가 된 미생물이 산소대신 산소결합체인 NO2, NO3를 사용하여 탈질이 일어나 결국 질소를 제거 하게된다. 남은 잔여 질소와 다시 두번째 무산조와 산소조를 통과하면서 제거된다. 질산화 탈질 미생물 외의 미생물에 의해 BOD와 SS는 동화작용 및 이화작용으로 CO2 및 에너지, 미생물의 증식에 이용된다. 데칸타(3)는 이러한 생물학적 처리를 위한 전처리 장치인 고액분리장치이다. 이를 PCF(6) 와 멤브레인(11), 전기분해조(13)를 장착하여 농축조(7)의 TDS 및 전기전도도에 따라 자동 제어되면서 장치를 연속적으로 운전하여 단점을 서로 보완하고 각각의 최대의 성능을 발휘하게 함으로써 고도의 수질을 안정적으로 처리할 수 있는 축산폐수 처리 시스템을 구성한다.The present invention is a livestock wastewater treatment system equipped with a decanter (3), a five-stage bardenpho process (4), a PCF (6), a membrane (11), and an electrolysis tank (13). BOD, TN, TP and chromaticity removal rate of 99% are processed in a batch, and have excellent efficiency and economy. The 5-stage bardenpho process (4), which is a biological treatment method, has an anaerobic tank at the front end, and an oxygen-free tank and an oxygen tank are alternately arranged in two stages. In the oxygen tank, the nitrification microorganism uses oxygen as an electron acceptor to produce energy and converts the energy into cell synthesis. Oxygen tank is a step of producing energy, oxidizing organic nitrogen and ammonia nitrogen to NO2, NO3 compound, and consuming organic nitrogen and ammonia nitrogen during cell synthesis, and excessive intake of phosphorus by microorganism occurs. The anaerobic tank removes phosphorus due to excessive release of phosphorus from returned microorganisms. The oxygen tank at the back prevents the re-emission of phosphorus by microorganisms. NO2 and NO3 compounds are returned to the anaerobic tank, and the anaerobic microorganisms are denitrified using NO2 and NO3, which are oxygen bonds instead of oxygen, and eventually remove nitrogen. Remaining nitrogen is removed as it passes through the second anaerobic and oxygen baths. By microorganisms other than nitrifying and denitrifying microorganisms, BOD and SS are used for the growth of CO2, energy and microorganisms by assimilation and catabolism. Decanter 3 is a solid-liquid separation device that is a pretreatment device for such biological treatment. It is equipped with PCF (6), membrane (11), electrolysis tank (13) and automatically controlled according to TDS and electric conductivity of thickener (7) to continuously operate the device to compensate for the shortcomings and maximize the performance of each By constructing the livestock wastewater treatment system that can treat the high quality water stably.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100589723B1 (en) * | 2005-12-02 | 2006-06-19 | (주)에코 멤브레인 | system for processing organic waste water of high concentration |
| KR101017006B1 (en) * | 2010-10-08 | 2011-02-23 | 새한인텍 (주) | Disposal apparatus for reverse osmosis concentrating water and disposal method thereof |
| KR101036657B1 (en) * | 2009-03-16 | 2011-05-25 | 김인언 | A bidirectional LED signal lamp of cross walk |
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| CN103613250A (en) * | 2013-12-04 | 2014-03-05 | 成都双地环境工程有限公司 | Method for treating pickle wastewater |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100589723B1 (en) * | 2005-12-02 | 2006-06-19 | (주)에코 멤브레인 | system for processing organic waste water of high concentration |
| KR101036657B1 (en) * | 2009-03-16 | 2011-05-25 | 김인언 | A bidirectional LED signal lamp of cross walk |
| KR101036658B1 (en) * | 2009-03-16 | 2011-05-25 | 김인언 | LED traffic signal lamp |
| KR101017006B1 (en) * | 2010-10-08 | 2011-02-23 | 새한인텍 (주) | Disposal apparatus for reverse osmosis concentrating water and disposal method thereof |
| CN103601336A (en) * | 2013-10-15 | 2014-02-26 | 常州思宇环保材料科技有限公司 | Method for removing food residues in restaurant wastewater |
| CN103601336B (en) * | 2013-10-15 | 2015-01-21 | 常州思宇环保材料科技有限公司 | Method for removing food residues in restaurant wastewater |
| CN103613250A (en) * | 2013-12-04 | 2014-03-05 | 成都双地环境工程有限公司 | Method for treating pickle wastewater |
| CN103613250B (en) * | 2013-12-04 | 2015-09-09 | 成都双地环境工程有限公司 | A kind for the treatment of process of pickle wastewater |
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