1) Check that all pipes and valves are in normal working condition.
2) Check the dosage pump and agitator of each dosing equipment are in normal working condition.
3) Check the electrical equipment in normal working condition.
2, a variety of pharmaceutical ratios and dosage mode:
Juice wastewater treatment project *** dosage of five pharmaceuticals, they are sodium hydroxide, flocculants, coagulants, nutrients (nitrogen, phosphorus) are described as follows:
1) Sodium hydroxide - used to regulate the water quality of the PH value. Dispensing method: 20%-25% configuration by weight concentration, i.e. 1 part of the drug 4 parts of water or 1 part of the drug 3 parts of water. Dosage: control according to PH requirements. Start-up period PH control in 7.8-8.5, normal working period PH control in 7-8.
Dosage: can be specially configured dosing device, dosage pump dosing, but also in the pool
Direct dosing.
2) coagulant - for the dosing of air flotation device and the dosing of the second sinking device.
Pharmaceutical name: polymerized aluminum chloride (PAC).
Method of dispensing: 10%-15% of the weight concentration of the configuration, that is, 1 part of the drug 9 parts of water or 1 part of the drug 7 parts of water. When the medicine is ready, turn on the stirrer and mix it until it is even and then you can use it.
The dosage: according to the water quality index test to determine the dosage, in general, according to the above proportion of the preparation of the drug dosage should be in
20-50mg / L range.
Dosing method: using specially configured dosing device,
metering pump dosing,
can also be in the pool directly
connected dosing.
3) flocculant - for the dosing of air flotation device and the dosing of the second sedimentation device.
Pharmaceutical name: No. 3 flocculant (polypropylene amide PAM).
Method of dosing: configure according to 1%-2% of the weight concentration, i.e. 1 part of the drug 99 parts of water or 1 part of the drug 98 parts of water. After the medicine is prepared, turn on the stirrer and stir it for at least 1.5-2 hours to make it ripen before use.
Dosage:
Determine the dosage after testing according to the water quality indexes, in general, the dosage of the medicine prepared according to the above ratio should be within the range of 5-10mg/L
.
Dosing method: using specially configured dosing device, metering pump dosing.
4) Nutrients - for the lack of nitrogen and phosphorus of industrial wastewater need to add nutrients. Nutrients in accordance with the C: N: P = 100: 5: 1 ratio control.
Pharmaceutical name: nitrogen (N) using agricultural urea, phosphorus (P) using agricultural phosphate fertilizer (ammonium dihydrogen phosphate).
Method of dispensing: 15%-20% of the weight concentration of the configuration, that is, 1 part of the drug 7 parts of water or 1 part of the drug 4 parts of water. The medicine is ready to use after the mixer is turned on and stirred evenly. Nutrients can also be added directly to the pool.
The amount to be added: according to the above ratio of carbon, nitrogen and phosphorus to be added.
Dosing method: use the specially configured dosing device, metering pump dosing, or direct dosing into the pool.
3, Note
1) All kinds of chemicals must be stored separately to prevent moisture.
2) The dosing equipment is regularly inspected and the debris in the dosing tank is regularly discharged.
3) Regularly check the lubrication of the agitator and metering pump, three months for overhaul
.