EnviroTas Treatment Process
Thanks to a five-stage treatment process the EnviroTas Advanced Secondary Wastewater Treatment System produces a class-leading treated effluent quality that can be used for irrigating under lawns and onto the garden.
PRIMARY TREATMENT
The first stage of treatment is to separate the solids from the liquids. The solids, mainly toilet wastes, remain in the first chamber where a digestion process takes place.
Digestion is accelerated by the presence of anaerobic micro-organisms which multiply rapidly under ideal conditions, ensuring that offensive faecal solids are turned into an inert waste. It is critical that the microbial action in the first tank is not hindered by the discharge of chemicals through household drainage fittings, e.g. chemical toilet cleaners and other anti-bacterial cleaning products.
SECONDARY TREATMENT
The subsequent treatment stages are mainly concerned with the aeration of the liquid wastes. Once more, microbes present in these liquids are used to assist in the aeration process. The micro-organisms are called aerobes and will thrive and multiple in the presence of oxygen. It is therefore important that a constant air supply is always being maintained. The air supply is supplied from an air pump installed in a green plastic enclosure on the cover slab of the wastewater treatment system.
SEDIMENTATION
Following aeration, the liquid wastes will settle in the sedimentation chamber in the wastewater treatment system under quiescent conditions. Any solid particles, which are suspended in the aerated effluent, will settle out and are returned automatically via a sludge return to the first chamber. The clarified water is ready for irrigation.
TERTIARY TREATMENT
If your system distributes the outfall above ground, then chlorination is required by law (AS 1546.3:2017). Due to the quality of the treated effluent, sub surface irrigation does not require chlorination. However, if required, a mild dose is used for preventing biofilm growth in the irrigation system.
NUTRIENT REDUCTION
The aerated, clarified, and disinfected water contains natural nutrients such as phosphates and nitrates. The EnviroTas-AS reduces the nutrient concentration by up to 75%, to a level that is both safe and beneficial for the environment.
Interested in an EnviroTas Advanced Secondary Wastewater Treatment System?
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