Use CasesNeutralizing 500 tons of rainwater each hour in an inline manner

Liquid Type
Process Type


Iron and steel manufacturer

Customer's Needs and Problems

The rainwater that falls within the site of a steelworks is strongly alkaline. This rainwater must be neutralized to reuse it within the steelworks.
Because the site is large, the amount of rainwater may exceed 500 t/h.
We contacted multiple manufacturers, but none of them were able to solve the following problems.

  • We want to reduce the installation area of the device as much as possible. To use pH neutralization with a tank requires a large tank with a size of 100 t or more, which greatly increases the installation area.
  • The treated volume and the pH fluctuate greatly depending on the weather, so it is necessary to support a wide control range.

TACMINA's Solutions

We suggested that the customer use a pH neutralizing device with a method that performs continuous processing within the pipes (inline) without requiring the installation of a neutralization tank, and they agreed to this proposal.

  • The entirety of the pH neutralization process is carried out inline, making this treatment possible with a short retention time.
  • Fluctuations in the treated volume and pH are supported through the use of a Smoothflow Pump, which is capable of a wide range of control at 1:100.
  • It is now possible to quickly treat rainwater with an amount of 500 t/h or more in a small space.

Flow Diagram