Is water quality worsened due to old infrastructure?

Published on by in Technology

We supply drinking water to 1.8 million people. Our raw water is (historically) hard and sulfated. We are about to build a pilot plant in order to test different treatments (UF + RO, PRO + chemical precipitation + SRO, Pellet softening + UF + RO, etc.). We will try to simultaneously achieve a high quality water and a tractable reject stream (in quality and quantity). But our distribution network is, in some parts, about one century old; we expect to find scaling and biofilm. Some ideas about how can this lower the quality we want to improve?

We will include a special module in the pilot plant, where we will be able to recirculate treated water along some pipes taken from the real network and check some lab indicators.