• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:

    公开号:NL1041404A
    申请号:NL1041404
    申请日:2015-07-21
    公开日:2016-07-12
    发明作者:Jozef Jacques Mayer Mateo
    申请人:Water Waves B V；
    IPC主号:
    专利说明:

    Method and device for ultrasonic disinfection of hospital waste water
    The present invention relates to a method and device for disinfecting water in general and hospital waste water in particular, characterized by the use of ultrasonic vibrations in combination with at least one synergistic disinfection technique from the group of (high-frequency) alternating current (AC) disinfectants, direct current (DC) disinfectants, AC over DC disinfectants, (JVC disinfection devices and photocatalysts. The ultrasonic vibrations are transferred energy-efficiently to the water to be treated by effectively connecting the transducer to the reactor wall and placing a packed bed of individual particles in the reactor.
    Description of the present invention
    Domestic waste water, waste water from care institutions such as hospitals and waste water from the bio-industry contain resistant bacteria and medicine residues that ultimately end up in relevant quantities at sewage treatment plants (STPs). The STPs are insufficiently equipped to effectively remove all pathogens and the many thousands of types of medicines from the wastewater. The result is a real risk that bacteria that are resistant to various types of antibiotics, as well as significant amounts of drug residues, will end up in our surface water.
    The technology according to the present invention makes it possible to disinfect waste water and at the same time to oxidize drug residues in the waste water in an environmentally friendly manner and at low energy costs.
    According to a first aspect, the technology according to the present invention consists of a tubular reactor with at least one liquid inlet and one liquid outlet. The tubular reactor is preferably made of metal, plastic or glass. According to a second aspect, the technology according to the present invention consists of packing particles with which the tubular reactor is at least partially filled. The packing particles have a density that preferably differs from that of water. Non-limiting examples are stainless steel gasket particles, glass gasket particles and polystyrene gasket particles. The diameter of the packing particles is preferably between 0.1 mm and 1 dm, more preferably between 1 mm and 5 cm and most preferably between 2 mm and 2 cm.
    In a third aspect, the technology according to the present invention consists of at least one ultrasonic transducer. This ultrasonic transducer preferably has a hole on one side into which a bolt is preferably screwed. The ultrasonic transducer is preferably attached to the tubular reactor by means of a metal or plastic bracket in the middle. The bolt is clamped against the tubular reactor at the end that is not screwed into the transducer. Instead of using clamping, the end of the bolt can also be welded to the reactor wall or screwed into the reactor wall. It is clear to the person skilled in the art that in this way ultrasonic vibrations are efficiently transmitted from the ultrasonic transducer via the bolt to the tubular reactor and thus to the fluid and the packing particles in the reactor. The transducer is connected to a function generator with an amplifier. The frequency and the amplitude of the amplifier can preferably be varied. The frequency range in which the amplifier operates is preferably in the range of 10 kHz to 20 MHz, more preferably in the range of 10 kHz to 2 MHz and most preferably in the range of 20 kHz to 2 MHz. Preferably, the function generator is software programmable and is set to make a frequency whip, i.e., a step change in frequency at which each frequency is generated for an adjustable time in the work area. It is clear to the expert in the field that the construction with ultrasonic transducer efficiently transfers ultrasonic vibrations of different frequencies to the liquid.
    According to a fourth aspect, the technology according to the present invention consists of at least a second disinfection technique which is applied simultaneously with the first disinfection technique and of the group of (high-frequency) alternating current (AC) disinfectants, direct current (DC) disinfectants, AC over DC disinfectants, UVC disinfectants devices and photocatalysts is selected. The AC, DC or AC over DC disinfectants are characterized by a voltage source and electrodes. The UVC disinfection devices are characterized by gas discharge lamps that produce UVC radiation. It is noted that other light sources such as UVB light sources and / or UVA light sources and / or light sources that produce visible light are suitable for use in the technology according to the present invention and can be combined therewith, but can also be used individually as the sole light source. The light sources are preferably gas discharge lamps.
    In short, the disinfection technique according to the present invention works as follows. By means of the ultrasonic vibration equipment it is possible to efficiently and in a wide frequency range transmit ultrasonic vibrations to the liquid in the reactor with packing particles. It is explicitly stated that the packing particles in a number of cases ensure that the energy transfer from ultrasonic vibrations to the liquid in the reactor makes more efficient, but that the packing particles are not necessary in all cases. The technique without packing particles is also emphatically part of the present invention. However, the packing particles generally ensure that the ultrasonic energy is better distributed over the liquid and less concentrated around the transducer and adjacent to the reactor wall.
    The ultrasonic vibrations in the fluid disturb the phospholipid structure of the cell membrane of the microorganisms. This makes the cell membrane of the microorganisms temporarily or permanently permeable. Part of the microorganisms die as a result of the cell contents flowing out of the cell. The part where the structure of the cell membrane is only disturbed is, moreover, susceptible to other disinfectants. This makes it possible to disinfect a liquid with a second disinfectant according to the technology of the present invention. In addition, by means of the ultrasonic vibrations, it is possible to break up aggregates of particles so that bacteria hidden therein can also efficiently kill.
    In one of the preferred embodiments, the technology of the present invention is combined with the use of a photocatalyst such as methylene blue. To this end, a low concentration of methylene blue (order of 1 mg methylene blue per liter of water to be disinfected) is introduced into the water to be disinfected. In combination with visible light and / or UVA radiation and ozone, radicals are formed in this way, with the result that the decomposition of medicine residues and disinfection of hospital waste water run efficiently.
    It will be clear to a person skilled in the art that the technology according to the present invention is generally applicable for disinfecting both drinking water and waste water. Furthermore, the technology according to the present invention is suitable for partially purifying water that is present in different biotopes. As non-limiting example, pond water or water from ditches and lakes is mentioned. In such a case, it is often not necessary or even desirable that the technology according to the present invention kills all microorganisms present in the water. In such cases, the technology according to the present invention can be used to reduce the infection pressure of the water by killing (preferably partially selectively) microorganisms in the water and / or removing organic contaminants including nutrients or medicine residues present in the water.
    Finally, it is noted that in a number of cases it is efficient to first subject water with a very high concentration of impurities, bacteria, inorganic and organic nutrients to a pre-treatment before applying the technology according to the present invention. Non-limiting examples of such pre-treatment are the use of a membrane bioreactor (MBR), a moving bed biofilm reactor (MBBR) and a digester. Combinations of these pre-purification techniques and the technology described in this application explicitly form part of the technology according to the present invention. An unexpected additional advantage of applying said pre-purification techniques is that the biodiversity of the microorganisms in the pre-treated water is greatly reduced by the pre-purification technique used, which allows extensive optimization of the steps with the technology according to the present invention since this optimization can be aimed at killing a limited number of microorganisms and / or removing a limited number of microorganisms.
    权利要求:
    Claims (12)
    [1]
    Device for disinfection and / or purification of water characterized by • a tubular reactor with at least one liquid inlet and liquid outlet • at least a first ultrasonic transducer in which a first end of a first bolt is screwed or anchored plus • a clamp with which the transducer is connected to the tubular reactor is characterized in that the second end of the first bolt, which is not screwed or anchored in the first transducer, is clamped against the tubular reactor or is welded to the tubular reactor or screwed into the tubular reactor. • a function generator and amplifier operatively connected to at least one ultrasonic transducer plus at least one microcontroller and software so that a frequency whip can be performed with the function generator • at least one disinfection or water purification element from the group of light sources.
    [2]
    Device according to claim 1, wherein at least one light source is a UVC light source.
    [3]
    Device according to one of the preceding claims 1 and 2, wherein at least one light source is a UVB light source.
    [4]
    Device according to any of the preceding claims 1 to 3, wherein at least one light source is a UVA light source.
    [5]
    Device according to one of the preceding claims 1 to 4, wherein at least one light source produces visible light.
    [6]
    Device as claimed in any of the foregoing claims 1 to 5 plus electrodes which are operatively connected to a direct current source and / or an alternating current source.
    [7]
    7. Device as claimed in claim 1, plus means for dosing a photocatalyst to the water to be purified which flows to the reactor or to dose it to the reactor.
    [8]
    Device according to any of the preceding claims 1 to 7, wherein the photocatalyst is methylene blue.
    [9]
    Device as claimed in any of the foregoing claims 1-8, wherein at least one light source consists of a gas discharge lamp.
    [10]
    Device as claimed in any of the foregoing claims 1 to 9 plus packing particles which are arranged in the reactor.
    [11]
    A method for disinfecting and / or purifying water, characterized by a device according to claim one of the preceding claims 1 to 9.
    [12]
    12. Method for only partially disinfecting and / or purifying water in order to reduce the infection pressure of the water in this way, characterized by a device according to one of the preceding claims 1 to 9 and the presence of living microorganisms in the purified water.
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    同族专利:
    公开号 | 公开日
    NL1041404B1|2017-11-08|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2020-05-08| MM| Lapsed because of non-payment of the annual fee|Effective date: 20190801 |
    优先权:
    申请号 | 申请日 | 专利标题
    NL1040931|2014-08-31|
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