1： With the deepening implementation of the Food Safety Law of the People's Republic of China and the General Rules for the Examination of Food Production Licenses, food production enterprises are facing increasingly stringent environmental control requirements. During food processing, dust particles, microorganisms, and cross contamination risks in the air directly affect product quality and compliance. The traditional production environment has the following core pain points: excessive dust and bacteria in the production environment lead to unqualified microbiological testing of products, which affects the yield rate and market access; Traditional clean rooms have a long construction cycle, high investment, and difficult spatial layout to meet the needs of production line adjustments; GMP certification and SC licensing review require enterprises to establish a production environment that meets the cleanliness level; Delayed after-sales response may result in production line shutdown and economic losses. The decoration of the purification workshop in a food factory must systematically address core issues such as air cleanliness, temperature and humidity control, personnel and logistics zoning, equipment and material selection, etc., to ensure that the production environment meets the cleanliness standards of 100000 to 300000 levels, and meets food production standards and acceptance requirements. 2、 Functional zoning and technical requirements for the purification workshop of a food factory. The purification workshop of a food factory needs to be functionally partitioned according to the process flow and cleanliness level requirements. Typical layouts include: 1 Cleanliness level of raw material pretreatment area: 300000 level (ISO 8 level) Functional positioning: Raw material cleaning, peeling, cutting and other initial processing operations Equipment configuration: stainless steel workbench, cleaning pool, waste collection device Technical points: The ground adopts anti slip and corrosion-resistant epoxy resin floor, the wall uses 50mm purification color steel plate, and is equipped with a separate exhaust system to prevent odor diffusion Cleanliness level of ingredient and mixing area: 100000 level (ISO 7 level) Functional positioning: raw material weighing, ingredient mixing, seasoning processing equipment configuration: electronic scale, stainless steel ingredient bucket, mixing equipment, transfer window Technical points: set positive pressure gradient (pressure difference ≥ 5Pa), install FFU fan filtration unit (filtration efficiency 99.99% @ 0.3 μ m), equipped with temperature and humidity control system (temperature 18-26 ℃, humidity 45% -65%) 3 Cleanliness level of hot processing area (steaming, baking, sterilization): 100000 to 300000 functional positioning: high temperature sterilization, baking processing, heat treatment process equipment configuration: steaming pot, oven, sterilization equipment, heat exchange system technical points: using high temperature resistant stainless steel decorative materials, designing an efficient dehumidification and heat dissipation system to avoid water vapor condensation pollution; Ground slope design ≥ 1% for easy drainage and cleaning Cleanliness level of cooling and filling area: 100000 level (ISO 7 level) Functional positioning: rapid cooling of products, sterile filling, sealing and packaging equipment configuration: laminar cooling equipment, automatic filling machine, sealing machine, hundred level purification shed (local thousand level or hundred level environment) Key differentiation value: The hundred level purification shed has the characteristics of fast installation, low input, and easy mobility, meeting the local high cleanliness requirements of the filling station, and achieving the working cleanliness requirements within 10 minutes Cleanliness level of inner packaging area: 100000 level (ISO 7 level) Functional positioning: Product inner packaging, labeling, and packing equipment configuration: ultra clean workbench, packaging machinery, stainless steel turnover vehicle Technical points: Set up buffer room and air shower room, personnel entering need to change clothes, wash hands, disinfect, and air shower dust removal (air shower time ≥ 15 seconds) to prevent human carrying pollutants into the area Cleanliness level of outer packaging area and finished product warehouse: 300000 level or general production area. Functional positioning: outer packaging, palletizing, and finished product storage. Technical points: physical isolation from the inner packaging area, setting up separate entrances and exits, and controlling temperature and humidity conditions Auxiliary functional area changing room: divided into one shift (taking off outer clothing), two shifts (wearing clean clothes), and three shifts (air shower and dust removal). Hand washing and disinfection room: equipped with induction type hand washing sink, disinfectant distributor, drying equipment, raw material warehouse: equipped with shelf system, temperature and humidity monitoring device. Cleaning equipment storage room: separately set to avoid cross pollution. III. Key points and technical standards for the construction of food factory purification workshop. (1) Wall material of enclosure structure system: 50mm thick purified color steel plate (core material is flame-retardant rock wool or glass magnesium board), surface sprayed with anti mold and antibacterial coating, aluminum profile edge sealing at joints, arc angle treatment (R ≥ 50mm), no dust accumulation dead corners; Ceiling system: using purified aluminum profile keel+color steel plate or aluminum buckle plate ceiling, with built-in high-efficiency filter air outlet, ceiling height of 2.6-3.0 meters, meeting equipment installation and airflow organization requirements; Ground system: 2mm thick epoxy resin self leveling floor, wear-resistant and corrosion-resistant, with a flatness of ≤ 2mm/2m. The junction with the wall is treated with a circular arc, and the slope design is convenient for cleaning and drainage; Door and window system: Install purification specific airtight doors (made of stainless steel or color steel plate material), equipped with door closers and interlocking devices; The observation window adopts double-layer insulated tempered glass, which facilitates external monitoring of the production process. （2） Efficient filtration system for air purification and airflow organization system: equipped with HEPA high-efficiency filters at the end, with a filtration efficiency of 99.99% @ 0.3 μ m, regularly checking the integrity of the filters to ensure no leakage; FFU fan filtration unit: modular design, flexibly arranged on the ceiling or local workstations, providing vertical unidirectional or mixed flow airflow organization; Fresh air treatment system: The fresh air is filtered through three stages: primary efficiency, medium efficiency, and high efficiency. The fresh air volume is ≥ 10% of the total air supply volume to ensure the respiratory needs of personnel; Pressure difference control: The pressure difference between adjacent rooms should be ≥ 5Pa, and the relative positive pressure in the clean area should be ≥ 10Pa to prevent the infiltration of polluted air; Ventilation rate: The ventilation rate in a 100000 level area is ≥ 15 times/hour, and in a 300000 level area it is ≥ 12 times/hour. （3） Temperature, humidity and environmental monitoring system with constant temperature and humidity control: temperature control of 18-26 ℃ (error ± 2 ℃), humidity of 45% -65% (error ± 5%), equipped with precision air conditioning or modular air conditioning units; Online monitoring system: Install temperature and humidity sensors, differential pressure gauges, and dust particle counters to monitor and record environmental parameters in real-time, with traceable data; Microbial control: Regularly conduct testing for planktonic and settling bacteria to meet the microbiological limit standards for food production environments. （4） Water supply system for water supply, drainage and fire protection: The production water meets the drinking water standard, and a separate water supply network is set up. The pipes used are 304 stainless steel or food grade PP-R pipes; Drainage system: Floor drains (with water seals) are installed on the ground, and the drainage pipes are made of UPVC material with a slope of ≥ 2% to ensure smooth discharge of wastewater; Firefighting facilities: equipped with fire extinguishers, fire hydrants, smoke detectors, emergency lighting and evacuation indication systems, in compliance with the second level qualification requirements for firefighting facilities. （5） Anti static and lighting system anti-static measures: The ground is covered with anti-static epoxy flooring, the workbench is made of anti-static stainless steel material, and the equipment grounding resistance is ≤ 4 Ω; Lighting system: Purification LED lamps are used (embedded flat panel lamps are used in high cleanliness areas), with an illumination of ≥ 300Lux, and emergency lighting illumination of ≥ 50Lux. 4、 Precautions and Quality Control for Construction of Purification Workshop in Food Factory (1) Preparation of Detailed Measurement of Site Dimensions, Drawing of Construction Drawings, Clarifying Functional Zoning and Equipment Points before Construction; Develop a construction organization plan and arrange the process reasonably (civil engineering decoration → purification system installation → equipment debugging → testing and acceptance); Select materials and equipment that meet national standards, and request quality assurance certificates and testing reports. （2） Construction process control enclosure structure installation: The verticality of color steel plate installation should be ≤ 3mm/m, the plate joints should be tight without leakage, and the rounded corners should be smooth without sharp edges; Pipeline installation: The air duct is made of galvanized steel plate or stainless steel material, with a clean and oil-free inner surface, and a sealing gasket is installed at the flange connection; Equipment installation: Conduct integrity testing on FFU and high-efficiency filters before installation to ensure sealing; The air conditioning equipment should be debugged and operated for more than 48 hours, and the parameters should be stable before delivery; Cleaning and Disinfection: After the construction is completed, a comprehensive cleaning should be carried out, using disinfectant to wipe the walls, floors, and equipment surfaces, and the purification system should run continuously for more than 24 hours. （3） Acceptance and cleanliness testing: Use a dust particle counter to check the cleanliness of each area to ensure compliance with the design level (100000 level, 300000 level); Differential pressure detection: Use a micro differential pressure gauge to measure the pressure difference between adjacent rooms, ensuring it is ≥ 5Pa; Air volume and air exchange rate: Use an anemometer to measure the air velocity at the air supply outlet and calculate whether the air exchange rate meets the standard; Temperature and humidity testing: continuous monitoring for 72 hours to verify the accuracy of temperature and humidity control; Microbial testing: Entrust a third-party testing agency to conduct testing on planktonic and settling bacteria, and issue a testing report; Completion documentation: Provide complete documentation such as photos of the entire construction process, material certificates, equipment manuals, inspection reports, and completion drawings. 5、 Detailed Explanation of Core Materials and Equipment in Food Factory Purification Workshop 1 Purification color steel plate composition: double-sided color coated steel plate+flame-retardant rock wool/glass magnesium core material characteristics: fire rating A, smooth and easy to clean surface, corrosion resistance, tight joints Application scenarios: walls, ceilings, partitions 2 FFU fan filtration unit composition: high-efficiency filter+low-noise fan+control system features: filtration efficiency of 99.99% @ 0.3 μ m, adjustable air volume, modular installation application scenarios: local high cleanliness workstations, ceiling air supply system 3 High efficiency filter (HEPA) composition: ultra-fine glass fiber filter paper+aluminum alloy or stainless steel frame Features: filtration accuracy of 0.3 μ m, low resistance, long service life Application scenarios: air conditioning terminals, FFU units, laminar flow hoods 4 Clean shed/purification shed composition: stainless steel or aluminum frame+transparent PVC soft curtain or acrylic board+FFU top air supply characteristics: fast assembly (completed in 2-3 days), low investment, movable, locally improving cleanliness to level 100 or 1000. Application scenarios: filling station, packaging table, inspection area 5 Ultra clean worktable composition: stainless steel worktable+high-efficiency filter+fan+UV lamp. Characteristics: can meet the working cleanliness requirements within 10 minutes, providing local level 100 environmental application scenarios: microbial detection, sample processing, precision assembly Stainless steel auxiliary equipment types: induction sink, instrument cabinet, locker, transfer window, automatic door. Features: 304 stainless steel material, corrosion-resistant, easy to clean, meets food hygiene requirements. Application scenarios: locker room, hand washing and disinfection room, material transfer channel 7 Epoxy resin flooring composition: base coat+intermediate coat+top coat (2mm thick self leveling) Characteristics: seamless dustproof, wear-resistant and pressure resistant, chemical corrosion resistant, easy to clean and disinfect Application scenarios: production workshop, corridor, warehouse floor 8 Purification LED lighting fixture composition: aluminum alloy lamp body+LED light source+transparent PC cover Features: embedded installation, smooth surface without dust accumulation, energy-saving and low heat