1. Use specialized sterile bottles for sampling, and refrigerate at low temperature (2-8 ℃) after sampling; 2. Before sampling, fully open the water outlet of the sampling point and drain for 3 minutes; 3. After turning off the water, use sterilized tweezers to wipe the inner and outer surfaces of the faucet three times with medicinal cotton soaked in 75% ethanol (or with medicinal cotton swabs soaked in 75% ethanol), and drain for another 3 minutes; 4. Water intake requirements: Use a dedicated sterile bottle to sample and collect water to 1/3 volume, wash 3 times, and then collect at least 1500ml of water as required (for physical and chemical testing); Not less than 200ml (for microbial limit detection); Not less than 100ml (entrusted inspection TOC) for sealing. Note: Both total organic carbon and volatile oxides can be selected as one option.

The process flow of the injection water equipment is as follows: (1) Pre treatment+dual stage reverse osmosis+multi effect distilled water machine (2) Pre treatment+single stage reverse osmosis+electro deionization+multi effect distilled water machine (3) Pre treatment+dual stage reverse osmosis+electro deionization+multi effect distilled water machine (4) Pre treatment+single stage reverse osmosis+electrodeionization+hot press distilled water machine

Liquid level alarm caused by water shortage in the water tank; High and low pressure alarms caused by valve misoperation; Low pressure alarm caused by incomplete flushing of the pre-treatment tank; Delayed replacement of pre-treatment consumables leads to blockage of the RO membrane; The long-term operation of RO membrane without cleaning results in a decrease in the quality and quantity of produced water; The decrease in water quality and quantity caused by RO loss; Changing the circuit caused the motor to reverse, resulting in pressure not coming up; The loss of water quality detection instruments leads to inaccurate detection of produced water quality, leading to misleading results.

Because activated carbon has the ability to adsorb free chlorine in water during pre-treatment, making it easy for microorganisms to grow in water without chlorine, pasteurization or pure steam disinfection is used to kill microorganisms that grow in water.