About Septic Tanks

Sodium aluminate is a very strong alkaline agent. It is one of many chemicals used in the treatment of wastewater. Sodium aluminate may be used alone or in combination with ferric sulfate and or with aluminum sulfate. When the solids content of the water is high, sodium aluminate may be added using calcium hydroxide.

Sodium aluminate forms a flocculate in very dilute solutions. Aluminum hydroxide is the acting flocculent precipitate. The cause of the coagulating property of the sodium aluminates is due to the sodium ion.

The main function of coagulants is to provide ions that are capable of neutralizing the electric charges present on most of the colloidal material suspended in the water, thus causing precipitation. The physical properties of the flocculate are high surface to volume ratio. This provides enough space for colloidal particles to adhere.

Algaecides are chemicals that kill algae when added to water. Examples are copper sulfate, iron salts, rosin amine salts, and benzalkonium chloride. Algaecides are effective against algae, but algal blooms. The problem with most algaecides is that they kill all present algae, but do not remove the toxins released by the algae.

Antifoam compounds are available either as powder or as an emulsion of the pure product. They are chemicals used in the treatment for wastewater. Foam is a mass of bubbles created when certain types of gas are dispersed into a liquid. When foam is not held under control, it can reduce the capacity of equipment and increase the duration and costs of processes. Antifoam blends contain oils combined with small amounts of silica. Due to two silicone properties, incompatibility with aqueous systems and ease of spreading, foam is broken down.

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