Laboratory testing is an important link in modern sewage treatment and environmental protection. The analysis data can not only analyze the inlet and outlet water, but also provide analysis data for the process flow in time to test the effect of process operation. According to the production requirements of process parameters and the analysis tasks of policies and regulations, the laboratory shall be established, necessary instruments, equipment and chemical reagents shall be purchased, qualified laboratory personnel shall be selected and trained, and strict scientific management shall be implemented, so that the laboratory work can be carried out in an orderly manner. The laboratory design requirements are 1) room layout and staffing. The laboratory is roughly divided into the following departments according to functions: ① sample preparation room: sample collection preparation, pretreatment, transfer and sample preservation; Article storage room: storage and custody of chemical reagents and glassware, and placement of toxic and dangerous reagents (equipped with safety cabinets); ③ Comprehensive physical and chemical room: basic laboratory operation and general physical and chemical analysis; (4) Precision instrument room: the place where precision instruments are placed. In addition to stable power supply conditions, this instrument needs to prevent electromagnetic interference, vibration, noise, corrosion, dust and constant temperature and humidity; ⑤ Balance room: professional weighing work Q: ⑤ Biological laboratory: It has specific requirements for environment and ventilation, and is responsible for biological experiments. Aseptic clean rooms have standard cleanliness requirements; ⑦ Auxiliary gas cylinder room: the place where gas cylinders are stored; Office (auxiliary room): data processing, file keeping, daily affairs management, logistics supply organization. Personnel training positions. Have professional skills and theoretical foundation. 2) Building requirements: the room structure shall be shockproof, fireproof, dustproof and poisoning-proof, with sufficient lighting. The building structure is mainly reinforced concrete structure, and the partition and ceiling decoration materials are considered to be fire-resistant. Floor tiles or terrazzo floors shall be used for the ground, windows shall be strictly dustproof, and light-proof curtains shall be installed. The experimental platform is made of corrosion-resistant and heat-resistant materials. Strong demand, tablet. 3) Water supply and drainage: take water from outdoor water supply pipe network and supply water directly. Install a master valve indoors, which requires convenient operation and floor drain. The materials of water supply pipes, valves and pipe fittings should be resistant to acid and alkali corrosion, and polyethylene materials are generally selected; It is suggested that PP material with strong corrosion resistance should be used for the test tank, and PVC material should be used for the drain pipe, joint, tee and elbow straight pipe. Standard for reserved height of drainage pipe: 80 ~ 100 mm.4) Ventilation design: Laboratory work may produce harmful gases, so ventilation facilities must be made to provide a safe and comfortable working environment. Natural ventilation is a common way of ventilation. Its advantage is that it does not consume energy, but when the space is large and the effect is poor, it can be turned to flow in a certain direction and the ventilation effect can be improved. Mechanical ventilation is a necessary way for some laboratories that need clean experimental environment. These laboratories need to install exhaust fans or exhaust fans for forced ventilation (local or whole room), and install appropriate filters at the air inlet of the room to block the interference of outdoor dust. The experiment of producing harmful gas needs to be carried out in a fume hood, which has the function of preventing gas from flowing back and isolating, and is an important problem in laboratory construction: the temperature in winter is low in cold areas, and the laboratory must be equipped with a heating system to maintain a proper room temperature; In addition, if there are high requirements for temperature and humidity, it is necessary to consider installing air conditioners for air conditioning. 5) Power design: budget the total power supply capacity of the laboratory. There are three-phase AC power supply and single AC power supply in the room, and set the main power supply control switch. If the experiment still needs to run after stopping, it should have a special power supply to avoid affecting its work by cutting off the main power supply. The power supply of precision instruments adopts special power supply, and the voltage is stable when necessary, and UPS regulated power supply is installed. Install three-phase sockets and single sockets. High-power sockets should have switch control and safety equipment (such as sockets with current above 20 A) to prevent short circuit and not affect the normal power supply of the whole room. In addition, the lighting electricity is separated from the equipment electricity, and the conventional laboratory lighting is 75 ~ 150LZ. 6) Safety design: The laboratory should be equipped with appropriate fire-fighting equipment and hazardous waste liquid collection devices for harmless treatment. According to the Water Quality Standard for Sewage Discharged into Urban Sewers (CJ 3082- 1999), the Comprehensive Wastewater Discharge Standard (GB 8978- 1996) and the Evaluation Standard for Operation and Management of Urban Sewage Treatment Plants in Jiangsu Province (for Trial Implementation), the items and cycles of sewage and sludge treatment and detection are as follows: sewage treatment with a treatment capacity of less than 654.38 million. ② Once a day: water content, organic matter and pH once a week: fecal coliforms. 2. According to the specified testing items and my years of experience, I have determined the purchase of instruments, appliances and reagents for small sewage laboratories. 2. The list of instruments, equipment and reagents for sewage treatment detection and analysis project is as follows: 1)CODcr: Method: potassium dichromate method (GBIL 914-89); Instruments and equipment: heating digester; (Note: CODcr automatic measuring device is optional); Glassware: Reflux device (condenser tube), iron frame, 50mL acid burette, 250mL triangular conical flask and glass beads: standby reagents: potassium dichromate (GR), phenanthroline, ferrous sulfate, ammonium ferrous sulfate, concentrated sulfuric acid, silver sulfate, mercury sulfate and potassium hydrogen phthalate (GR). 2)PH (water temperature): Methods: Glass electrode method (GB 6920-86); Instruments and equipment: PII meter (with temperature sensor): glassware: 100mL beaker; Standby reagent: PH standard reagent 25℃ (4.00, 6.86. 9.23)。 3) Chromaticity: Methods: Dilution multiple method (GBLL 903-89): Glassware: 50 ml plug colorimetric tube. 4)BoD5: Methods: dilution inoculation method (GB-7488-87); Instruments and equipment: BOD incubator, Do tester, magnetic oscillator: (Note: BOD automatic tester is optional); Glassware. Dissolved oxygen bottle, glass stirrer, 1000 ~ 2000ml measuring cylinder, 5 ~ 20L fine-mouthed glass bottle and inverted siphon; Spare reagents: potassium dihydrogen phosphate, dipotassium hydrogen phosphate, disodium hydrogen phosphate heptahydrate, ammonium chloride, magnesium sulfate, calcium chloride, ferric chloride, sodium sulfite, hydrochloric acid, sodium hydroxide, glucose and glutamic acid. 5)ss: Methods: Gravimetric analysis GBLL 901-89; Instruments and equipment: microporous membrane filtration device, vacuum pump, air drying oven, water bath pot, electronic analytical balance (110000): glassware: suction filter bottle, toothless flat-nosed tweezers, dryer, evaporating dish, weighing bottle with a diameter of 30-50 mm: standby reagent: 0.45um membrane. 6) Ammonia nitrogen: Methods: Nessler's reagent spectrophotometry (GB 7479-87); Instruments and equipment: spectrophotometer, acidity meter; Glassware: 50mL plug colorimetric tube, polyethylene bottle, glass rod, distillation device (prepared without ammonia) and test tube rack; Spare reagents: sodium hydroxide, potassium iodide, mercuric iodide, potassium sodium tartrate and ammonium chloride (GR). 7)TN: Method: ultraviolet spectrophotometry (GBll894-89): instruments and equipment: ultraviolet spectrophotometer, pressure steam sterilizer or civil pressure cooker (pressure is1.1~1.3kg/cm2, corresponding temperature is120. Glassware: 25ml plug colorimetric tube, beaker and test tube rack: standby reagents: sodium hydroxide, potassium persulfate, hydrochloric acid and potassium nitrate (GR). 8)TP: Methods: Ultraviolet spectrophotometry (GBLL 894-89); Instruments and equipment: spectrophotometer, pressure steam sterilizer or civil pressure cooker (pressure is 1. O ~ 1.5 kg/cm2): glassware: 50=I (grinding mouth) with colorimetric tube and test tube rack: standby reagents: potassium persulfate, sulfuric acid, ascorbic acid, ammonium molybdate and potassium antimonate. Glassware: 150mL conical flask, 50mL brown acid burette; Spare reagents: sodium chloride (GR), silver nitrate (GR), potassium chromate, phenolphthalein, potassium aluminum sulfate, hydrogen peroxide, potassium permanganate and ethanol. 10)DO: methods: iodometry (GB7489-87) instrumental method; Instruments and equipment: portable measuring instruments can be selected; Glassware: 50mL brown alkaline burette, iodine flask, 250 ~ 350 ml dissolved oxygen bottle, pipette and brown bottle; Spare reagents: manganese sulfate, sodium hydroxide, potassium iodide, sulfuric acid, starch, potassium dichromate (GR) and sodium thiosulfate. 1 1)MLSS: method: gravimetric analysis; Instruments and equipment: centrifuge, blast drying oven, water bath pot, electronic analytical balance (110000); Glassware: lOOml porcelain bowl, lOOmL measuring cylinder, crucible pliers, dryer. 12)MLVSS: method: gravimetric analysis; Instruments and equipment: centrifuge, blast drying oven, water bath pot, electronic analytical balance (110000), muffle furnace (box resistance furnace); Glassware: 50 ml crucible, 100 ml measuring cylinder, crucible pliers, dryer. 13) SV%: glassware: 0000ml, 1000ml measuring cylinder. 14) biological phase: instruments and equipment: biological microscope; Glassware: glass slide, cover glass, 50 ml beaker and dropper. 15) water content of sludge: method: gravimetric analysis; Instruments and equipment: electronic analytical balance (110000), blast drying oven; Glassware: lOOml porcelain bowl, crucible pliers, dryer. 16) Sludge organic matter: Method: Gravity analysis; Instruments and equipment: blast drying oven, electronic analysis balance (110000), muffle furnace (box resistance furnace); Glassware. .50ml crucible, crucible pliers and dryer. 17) fecal coliforms: methods: multi-tube fermentation: instruments and equipment: pressure steam sterilizer, constant temperature incubator,; Glassware: lOml fermentation tube with silicone plug, small inverted tube, test tube rack, alcohol lamp and inoculation needle; Spare reagents: lactose peptone medium and Ec medium. 2.2 Spare appliances and instruments for routine experimental operation 1) Preparation of experimental water: instruments and equipment: pure water machine, (distilled water generator) and conductivity meter; Glassware and accessories: plastic water collecting bucket, glass water releasing bottle, rubber conduit. 2) Preparation and storage of solutions, instruments and equipment; Ordinary electronic balance, electronic analytical balance (110000), magnetic stirrer, refrigerator; Glassware and accessories: (100ml, 500ml, 1000m 1) measuring cylinder, (50ml, 100ml, 200mL, 500ml, 100ml, 2000. Colorless brown volumetric flask (50m 1. 1lOml, 200ml, 250m 1.500ml, 1000m 1): graduated pipette (1, 2, 2) Belly straws (1, 2,5,10,20,50,100 ml); Wash bottles and droppers; Ordinary funnel (short tube and long tube); Commonly used spherical separatory funnel; Glass sand core funnel, weighing bottle (diameter 160 ~ 300mm) and angle spoon; Glass rod, ear washing ball, weighing paper, filter paper. 3) Heating, distillation and fractionation: instruments and equipment: alcohol lamp, electric furnace, water bath pot and distillation (fractionation) device; Glassware and accessories: shovel bottom, flat-bottomed flask, spherical (serpentine) condenser tube, connecting tube, iron frame, asbestos mesh, zeolite and rubber conduit. 4) Washing and drying of utensils: instruments and equipment: utensil dryer: glassware and accessories: brushes, tube brushes, test tubes, pipette racks and gloves.
For more information about project/service/procurement bidding, and to improve the winning rate, please click on the bottom of official website Customer Service for free consultation:/#/? source=bdzd