Tech & Tools

Technical information

  • HOME
  • Tech & Tools
  • Alkaline discharge chemical, Chemical injection rate of carbon dioxide

NEUTRALIZATION CALCULATION pH neutralization calculation

Calculation of required gas injection amount when adding carbon dioxide gas to alkaline wastewater to neutralize to pH7


Raw water flow(m3/h)
Raw water pH
Margin ※1
Chemical name
carbon dioxide gas


Chemical injection amount(kg/h)
Gas injection amount(Nl/min)

The result of this calculation is just a reference value and does not guarantee the pros and cons of neutralization.

*1 Margin
In the actual neutralization reaction, it is rarely neutralized according to theory because of the formation of salts between the neutralizing chemicals and the components contained in the water. Therefore, the calculation result multiplied by the margin is used as a guide for the injection amount. (Margin: about 3 to 10 times)

Head Office

1-12-11 Tagawakita, Yodogawa-ku,Osaka

Overseas Business Department

TEL +81-6-6301-6460
FAX +81-6-6308-3022