Caustic Soda for Water Treatment

Caustic soda, also known as sodium hydroxide, is an indispensable chemical reagent widely adopted in municipal sewage treatment, industrial wastewater treatment and circulating water conditioning projects. Both solid caustic soda (flakes, pearls) and liquid caustic soda with 32% and 50% concentration can be applied for different water‑processing scenarios.

The primary function of caustic soda in water treatment is pH value adjustment and neutralization. A large number of industrial manufacturing processes will discharge acidic wastewater. By adding industrial‑grade sodium hydroxide, operators can effectively raise the pH of wastewater to the qualified discharge range, meet environmental protection discharge standards and avoid corrosion damage to pipelines and treatment equipment caused by acid liquid.

Besides pH regulation, caustic soda plays an important role in heavy‑metal precipitation treatment. When mixed into wastewater, hydroxide ions will react with heavy‑metal ions such as copper, iron, zinc and chromium, forming insoluble metal hydroxide precipitates. These sediments can be filtered and separated easily, so as to remove harmful heavy‑metal pollutants from water bodies.

Liquid caustic soda 32% and 50% are favored for large‑scale continuous water‑treatment stations, featuring convenient dosing and fast dissolving speed. Solid caustic soda flakes and pearls are suitable for small‑and‑medium‑size factories with intermittent dosing requirements, convenient for transportation and storage.

Fangyuan Chemical supplies stable‑quality solid and liquid caustic soda products. Our raw materials have low heavy‑metal impurity content, will not bring extra pollutant load to the water system. We can support bulk tank truck delivery for liquid caustic soda and container packaging for solid products, to satisfy diverse procurement demands of water‑treatment engineering companies and manufacturing enterprises.