Neutralization (Water & Wastewater Treatment Plants, WWTP_CAMIX Vietnam)
DESCRIPTION
The purpose of neutralization is to adjust the pH value to meet the requirements of the different processing units in the wastewater treatment system.
Neutralization may be used in order to treat acid wastewaters containing metals, the method comprising increasing the pH of the acid waste by addition of an alkaline reagent, to form a precipitate and collecting the precipitate. This way the incoming solution is pH adjusted to the optimum range for precipitating metals as hydroxides.
This step is conducted before the main step of wastewater treatment, that is clarification (=decantation), to fulfill the overall wastewater treatment objectives.
Neutralizations are of great importance in chemical processes for
■ Protection of plants (pipes, tanks and vessels) against corrosion,
■ Optimal conditions for chemical processes,
■ Neutralization of solution as a preliminary stage of waste water treatment.
In many cases, the customer has to deal with process conditions like high temperatures or aggressive process liquids, for which LiquiSonic® sensors can be used without problems. Due to their rugged construction and special materials, they are able to measure with high precision even in difficult conditions.
The online measuring technology is able to adjust exactly the feed or surplus of alkalis, which result in cost savings and plant safety.
The neutralization of gaseous components caused by process exhaust air is also of great importance. Here gas scrubbers are used, which absorb the components of the gas flow by means of a scrubbing liquid.
REFERENCE PHOTOS
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