Neutralization

1. Description: Sewage must be neutralized to adjust its pH value. Only through this process they will meet the requirements of the various unit process that make up wastewater treatment systems. Neutralization can be used for acidic wastewater treatment that contain metals. The addition of an alkaline reagent increases the pH of acid waste, this forms a precipitate that collects unwanted metals. The result is an initial solution whose pH has been adjusted within an optimum range to precipitate metals like hydroxides.

2. Ranges of design: Capacities from 5 to 200 m³/h.

• Important design factors to be considered:

              i. Maintain stable characteristics of flow rate and pH in the inflow of the purifier.

              II. The neutralization tank depth should not exceed 3 m.

              III. Neutralization tank should be (preferably) of circular cross-section and with a diameter equal to its depth.

              IV. Retention time in neutralization tanks should vary between 5 and 30 min (30 minutes are recommended to neutralize with lime).

               V. If the neutralization tank mixture is aerated, it is recommended acquiring equipment that allows between 0.3 and 1.0 m³ of air to be injected per minute and per m² of tank.

               VI. If the mixture in the neutralization tank is performed mechanically, equipment must be purchased that develops power between 40 and 80 W per m³ of tank.

3. Applications: Industrial plants (metallurgical, chemical, petrochemical, pharmaceutical, etc.).

4. Benefits:

     a. Equipment with excellent chemical resistance.

     b. Low cost of operation and maintenance.