Organic contamination membrane cleaning apparatus

Abstract

The utility model discloses an organic matter pollution membrane cleaning equipment, include: microorganism culture unit, microorganism culture unit includes microorganism culture dish for cultivating enzyme -producing microorganism, ultrafiltration separation unit, ultrafiltration separation unit includes ultrafiltration membrane for separating microorganism and enzyme system in the mixed solution of microorganism culture unit output, membrane cleaning unit, membrane cleaning unit includes membrane washes water storage tank and cleaning fluid circulating pump for storing and circulating enzyme system cleaning fluid to clean the membrane equipment that is contaminated, microorganism culture unit, ultrafiltration separation unit and membrane cleaning unit are connected in proper order through the pipeline, and all pipelines are provided with control valve on the fluid passage. Through the integration microorganism culture and enzyme production system, realize the self -production of cleaning enzyme and use, to solve the problem that traditional chemical cleaning method pollutes greatly, and the damage membrane material, and the problem that the cost of enzyme cleaning method of purchase is high, and the poor flexibility, to reach the membrane cleaning effect of high efficiency, environmental protection, low cost.

Description

Technical Field

[0001] This utility model belongs to the field of water treatment technology, and in particular relates to a membrane cleaning device for organic pollutants. Background Technology

[0002] To restore membrane performance, fouled membranes must be cleaned regularly. Currently, the mainstream industrial cleaning method is chemical cleaning, which uses chemicals such as acids, alkalis, and oxidants (e.g., sodium hypochlorite) to dissolve or oxidize and decompose contaminants. However, this traditional chemical cleaning method has many inherent drawbacks: High risk of environmental pollution: The waste liquid generated after cleaning contains residual chemical agents, which can cause secondary pollution to the environment if not handled properly.

[0003] The harsh cleaning conditions can easily damage the membrane material: the strength of chemical agents and operating conditions are strictly limited by the chemical stability of the membrane material itself. For example, commonly used polyamide reverse osmosis membranes are very sensitive to pH values, and their tolerable cleaning pH range is usually only between 2 and 12; at the same time, they are also extremely sensitive to oxidants, requiring that the free chlorine content in the feed water not exceed 0.1 mg / L, which greatly limits the application of strong chemical cleaning agents (such as high-concentration sodium hypochlorite).

[0004] Poor cleaning effect on certain organic pollutants: For some complex and stable organic pollutants (such as certain humic acids, extracellular polymers, etc.), conventional chemical cleaning methods are often ineffective, resulting in membrane fouling that cannot be completely restored and leading to an irreversible fouling trend.

[0005] In recent years, bio-enzyme cleaning has gained attention as a green and efficient cleaning alternative. Enzymes possess advantages such as high efficiency, specificity, and mild reaction conditions, enabling them to specifically catalyze the decomposition of specific organic compounds at room temperature and pressure without damaging the membrane material itself. However, current enzyme cleaning technology still faces challenges in practical applications: it mainly relies on purchased commercial enzyme preparations. This approach suffers from high costs, limited enzyme types, poor storage stability, and the inability to flexibly produce the most effective enzyme systems for specific contaminants. When enzymes in the cleaning system become inactive due to inhibition, decomposition, or contamination, new commercial enzymes need to be continuously replenished, which is not only cumbersome but also further increases operating costs.

[0006] Therefore, there is an urgent need in this field for a new type of membrane cleaning equipment that can overcome the above-mentioned defects, which can not only give full play to the green and efficient advantages of enzyme cleaning, but also get rid of the dependence on purchased commercial enzymes, and achieve low-cost, sustainable, targeted and efficient cleaning. Utility Model Content

[0007] To address the problems existing in the prior art, this utility model provides an organic contamination membrane cleaning device. By integrating a microbial culture and enzyme production system, it achieves self-production and self-use of cleaning enzymes, thereby solving the problems of high pollution and membrane material damage caused by traditional chemical cleaning methods, as well as the high cost and poor flexibility of purchased enzyme cleaning methods. This results in a highly efficient, environmentally friendly, and low-cost membrane cleaning effect.

[0008] This invention is implemented as follows: an organic contamination membrane cleaning device includes: a microbial culture unit, comprising a microbial culture dish for culturing enzyme-producing microorganisms; an ultrafiltration separation unit, comprising an ultrafiltration membrane for separating the microorganisms and enzyme system in the mixed solution output from the microbial culture unit; and a membrane cleaning unit, comprising a membrane cleaning water tank and a cleaning solution circulation pump for storing and circulating the enzyme system cleaning solution to clean the contaminated membrane equipment; the microbial culture unit, ultrafiltration separation unit, and membrane cleaning unit are connected sequentially by pipelines; all pipelines forming a fluid passage are equipped with control valves.

[0009] More preferably, the microbial culture unit further includes: a nutrient supply pipeline, an oxygen supply pipeline, and an exhaust pipeline connected to the microbial culture dish; each of the nutrient supply pipeline, oxygen supply pipeline, and exhaust pipeline is equipped with a control valve.

[0010] Further preferably, the ultrafiltration separation unit further includes: a microbial and enzyme mixing pipeline, one end of which is connected to the outlet of the microbial culture dish and the other end of which is connected to the inlet of the ultrafiltration membrane; an enzyme system delivery pipeline, one end of which is connected to the generation port of the ultrafiltration membrane and the other end of which is connected to the membrane washing storage tank; and a culture medium circulation pipeline, one end of which is connected to the concentrate port of the ultrafiltration membrane and the other end of which is connected to the culture medium circulation control valve connected to the microbial culture dish; control valves are provided on the microbial and enzyme mixing pipeline, the enzyme system delivery pipeline, and the culture medium circulation pipeline.

[0011] More preferably, the culture medium circulation pump installed on the culture medium circulation pipeline is used to transport the concentrated solution rich in microorganisms back to the microbial culture dish, so as to realize the reuse of microorganisms.

[0012] Further preferably, the membrane cleaning unit further includes: a cleaning fluid supply pipeline, one end of which is connected to the outlet of the membrane cleaning water tank, and the other end of which is connected to the main inlet pipe of the membrane cleaning equipment; a cleaning fluid return pipeline, one end of which is connected to the reverse osmosis return water main pipe of the membrane cleaning equipment, and the other end of which is connected back to the membrane cleaning water tank through the cleaning fluid circulation pump; both the cleaning fluid supply pipeline and the cleaning fluid return pipeline are equipped with control valves.

[0013] The advantages and technical effects of this utility model are as follows: This invention innovatively integrates microbial culture, membrane separation, and fluid control technologies to provide a highly efficient, economical, and environmentally friendly solution for cleaning organic-contaminated membranes. Its overall technical advantages are significant: firstly, it is green and environmentally friendly, using biological enzymes instead of traditional chemical agents to fundamentally eliminate the generation of toxic and harmful waste liquids; secondly, it is highly efficient and economical, significantly reducing cleaning costs through in-situ enzyme production by microorganisms and cell recycling, while the specific catalysis of enzymes ensures cleaning efficiency; thirdly, it is safe and reliable, with mild enzyme catalytic reaction conditions avoiding damage to membrane materials, and precise control of each unit ensuring stable system operation. This invention provides a revolutionary technical approach to solving the problem of organic membrane fouling and has significant value for widespread application. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model. In the diagram: 10. Microbial culture unit; 101. Microbial culture dish; 102. Nutrient supply pipeline; 103. Oxygen supply pipeline; 104. Exhaust pipeline; 20. Ultrafiltration separation unit; 201. Ultrafiltration membrane; 202. Microbial and enzyme mixing pipeline; 203. Enzyme system delivery pipeline; 204. Culture medium circulation pipeline; 205. Culture medium circulation pump; 30. Membrane cleaning unit; 301. Membrane cleaning water tank; 302. Cleaning solution circulation pump; 303. Cleaning solution supply pipeline; 304. Cleaning solution return pipeline; 40. Control valve. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.

[0016] Please see Figure 1 An organic contamination membrane cleaning device includes: a microbial culture unit 10, which includes a microbial culture dish 101 for culturing enzyme-producing microorganisms; an ultrafiltration separation unit 20, which includes an ultrafiltration membrane 201 for separating the microorganisms and enzyme system in the mixed solution output from the microbial culture unit 10; and a membrane cleaning unit 30, which includes a membrane cleaning water tank 301 and a cleaning solution circulation pump 302 for storing and circulating enzyme system cleaning solution to clean the contaminated membrane equipment; the microbial culture unit 10, the ultrafiltration separation unit 20, and the membrane cleaning unit 30 are connected sequentially by pipelines; all pipelines forming a fluid passage are equipped with control valves 40.

[0017] This solution constructs a closed-loop system integrating microbial culture, enzyme separation, and membrane cleaning, achieving in-situ production and precise dosing of cleaning enzymes. By cultivating specific enzyme-producing microorganisms, targeted contaminants can be decomposed, solving the problems of low efficiency and membrane material damage associated with traditional chemical cleaning. Ultrafiltration membranes effectively separate microorganisms and enzyme systems, ensuring the purity of the cleaning solution. Control valves in each pipeline enable independent control of each unit and flexible process switching, significantly improving operational accuracy and system stability, providing a complete equipment solution for efficient and environmentally friendly membrane cleaning.

[0018] Further preferably, the microbial culture unit 10 further includes: a nutrient supply pipeline 102, an oxygen supply pipeline 103, and an exhaust pipeline 104 connected to the microbial culture dish 101; each of the nutrient supply pipeline 102, the oxygen supply pipeline 103, and the exhaust pipeline 104 is provided with a control valve 40.

[0019] This solution achieves precise control of the microbial culture environment by setting up independent nutrient supply, oxygen supply, and exhaust systems, equipped with control valves. The nutrient and oxygen supply rates can be flexibly adjusted to create optimal conditions for microbial growth and enzyme metabolism, significantly improving enzyme yield and activity. The exhaust pipeline can promptly remove metabolic waste gases, maintain pressure balance in the culture system, and ensure the safe and stable fermentation process. This design provides a stable and efficient enzyme source for subsequent cleaning stages, guaranteeing the continuous and reliable operation of the entire system.

[0020] Further preferably, the ultrafiltration separation unit 20 further includes: a microbial and enzyme mixing pipeline 202, one end of which is connected to the outlet of the microbial culture dish 101 and the other end of which is connected to the inlet of the ultrafiltration membrane 201; an enzyme system delivery pipeline 203, one end of which is connected to the generation port of the ultrafiltration membrane 201 and the other end of which is connected to the membrane washing storage tank 301; and a culture medium circulation pipeline 204, one end of which is connected to the concentrate port of the ultrafiltration membrane 201 and the other end of which is connected back to the microbial culture dish 101 via a culture medium circulation pump 205; and control valves 40 are provided on the microbial and enzyme mixing pipeline 202, the enzyme system delivery pipeline 203, and the culture medium circulation pipeline 204.

[0021] This scheme clarifies the specific flow path design of the ultrafiltration separation unit, achieving efficient separation and resource utilization of microorganisms and enzyme systems. A mixing pipeline introduces the fermentation broth into the ultrafiltration membrane; an enzyme delivery pipeline transports the purified enzyme solution to the cleaning unit; and a culture medium circulation pipeline returns concentrated microorganisms to the culture dishes, realizing the recycling of the microbial cells. This design not only improves cell utilization and enzyme production efficiency and reduces operating costs, but also enables the system to continuously and stably produce enzyme preparations, providing a continuous and sufficient source of enzymes for membrane cleaning.

[0022] Further preferably, the culture medium circulation pump 205 installed on the culture medium circulation pipeline 204 is used to transport the concentrated solution rich in microorganisms back to the microbial culture dish 101, realizing the reuse of microorganisms. This solution achieves efficient recycling of microorganisms by setting up a culture medium circulation pump. The pump provides power for the return of microbial cells, ensuring that the active microorganisms retained by the ultrafiltration membrane can be stably and continuously returned to the bioreactor, forming a microbial cell enrichment system. This not only greatly improves the utilization rate of microorganisms and reduces nutrient consumption, but also enables the reactor to maintain a high biomass density, thereby achieving high-throughput, uninterrupted enzyme preparation production, significantly improving the system's economy and operating efficiency.

[0023] Further preferably, the membrane cleaning unit 30 further includes: a cleaning fluid supply pipeline 303, one end of which is connected to the outlet of the membrane cleaning water storage tank 301, and the other end is connected to the main inlet pipe of the membrane cleaning equipment; a cleaning fluid return pipeline 304, one end of which is connected to the reverse osmosis return water main pipe of the membrane cleaning equipment, and the other end is connected back to the membrane cleaning water storage tank 301 through the cleaning fluid circulation pump 302; both the cleaning fluid supply pipeline 303 and the cleaning fluid return pipeline 304 are equipped with control valves 40.

[0024] This solution improves the circulation loop design of the membrane cleaning unit, forming an independent and controllable closed-loop cleaning system. Through the cleaning solution supply and return pipelines, in conjunction with the circulation pump and control valves, continuous circulation of the cleaning solution between the membrane equipment to be cleaned and the water storage tank is achieved. This design maintains a uniform cleaning solution concentration, prolongs the interaction time between enzymes and contaminants, and ensures deep and thorough cleaning. The control valves can precisely adjust the flow rate and pressure during the cleaning process, ensuring cleaning effectiveness while avoiding hydraulic shock to sensitive membrane elements, effectively protecting the membrane material and extending its service life.

[0025] In operation, this device first cultivates specific enzyme-producing microorganisms targeting the contaminant in the microbial culture unit. Nutrient and oxygen supplies are precisely regulated by control valves to optimize culture conditions. The mature, microbial- and enzyme-rich mixture then enters the ultrafiltration separation unit via a microbial-enzyme mixing pipeline, where the microorganisms and enzymes are efficiently separated by the ultrafiltration membrane. The purified enzymes pass through the ultrafiltration membrane into the membrane wash tank for later use, while the concentrated microbial cells are returned to the culture dish via a culture medium circulation pump for continued utilization, achieving continuous enzyme production. When cleaning is required, the cleaning solution circulation pump is activated, allowing the enzyme-based cleaning solution in the tank to enter the membrane device to be cleaned via the cleaning solution supply pipeline. After fully reacting with the contaminant, the solution returns to the tank via the cleaning solution return pipeline, forming a closed-loop cycle until cleaning is complete. Throughout the process, the control valves of each pipeline ensure coordinated operation of all system units, achieving an efficient and controllable cleaning process.

[0026] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An organic-contaminated membrane cleaning device, characterized in that, include: A microbial culture unit, comprising a microbial culture dish, for culturing enzyme-producing microorganisms; An ultrafiltration separation unit, comprising an ultrafiltration membrane, is used to separate microorganisms from enzyme systems in a mixture output from a microbial culture unit; A membrane cleaning unit, comprising a membrane cleaning water tank and a cleaning solution circulation pump, for storing and circulating enzyme-based cleaning solution to clean contaminated membrane equipment; The microbial culture unit, ultrafiltration separation unit, and membrane cleaning unit are connected in sequence via pipelines; All pipelines that form fluid passages are equipped with control valves.

2. The organic contaminated membrane cleaning equipment according to claim 1, characterized in that, The microbial culture unit further includes: Nutrient supply lines, oxygen supply lines, and exhaust lines are connected to the microbial culture dish; Control valves are installed on the nutrient supply pipeline, oxygen supply pipeline and exhaust pipeline.

3. The organic contaminated membrane cleaning equipment according to claim 1, characterized in that, The ultrafiltration separation unit also includes: A microbial and enzyme mixing pipeline, one end of which is connected to the outlet of the microbial culture dish, and the other end of which is connected to the inlet of the ultrafiltration membrane; An enzyme delivery pipeline is connected at one end to the generation port of the ultrafiltration membrane and at the other end to the membrane washing water storage tank. The culture medium circulation pipeline has one end connected to the concentrate outlet of the ultrafiltration membrane and the other end connected to the culture medium circulation control valve and the microbial culture dish. Control valves are installed on the microbial and enzyme mixing pipeline, the enzyme system delivery pipeline, and the culture medium circulation pipeline.

4. The organic contaminated membrane cleaning equipment according to claim 3, characterized in that, The culture medium circulation pump installed on the culture medium circulation pipeline is used to transport the concentrated solution rich in microorganisms back to the microbial culture dish, so as to realize the reuse of microorganisms.

5. The organic contaminated membrane cleaning equipment according to claim 1, characterized in that, The membrane cleaning unit further includes: The cleaning fluid supply pipeline is connected at one end to the outlet of the membrane washing water storage tank and at the other end to the main inlet pipe of the membrane cleaning equipment. The cleaning solution return pipeline is connected at one end to the reverse osmosis return water main of the membrane cleaning equipment, and at the other end to the membrane cleaning water storage tank through the cleaning solution circulation pump. Both the cleaning fluid supply line and the cleaning fluid return line are equipped with control valves.

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