SEWER TREATMENT PLANT
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ZeoSTP – Zero Energy Operation
The ZeoSTP is abbreviation of Zero Energy Operation Sewer Treatment Plant. As the name suggest this System does not need any operational cost, no need of any kind of chemicals, manpower or machinery, it’s an maintenance free sewer treatment system that doesn’t need power or electricity. ZeoSTP is fundamentally a sealed cement chamber of required size that is lined with an impermeable membrane, filled with media; planted with macrophysics such as reeds and rushes. Wastewater whether black or grey passes through the root zone of the reeds where it undergoes treatment via physical, chemical and biological interactions between the wastewater, plants, micro-organisms, gravel and atmosphere. Inlet and outlet pipes are positioned in such a fashion below the gravel surface, so that the water always remains below the root zone are, thus minimizing the risk of human exposure to the wastewater, mosquito breeding and unpleasant odors.
Wastewater from bathroom, kitchen and toilets enter into a SeptiPure BioFurnace, an advance Readymade Septic Tank designed by us for primary treatment to remove large solids, grease and oils. Anaerobically treated effluent from the SeptiPure BioFurnace passes through distribution pipe, and then flows into the ZeoSTP for secondary treatment. Inside ZeoSTP wastewater undergoes a complex series of natural treatment processes without chemical dosing as it moves laterally by gravity flow through root zone from one end to other side. In ZeoSTP plants give away small amount of oxygen out through their roots, creating aerobic environment without aeration device hence no electric power is needed. This mix of aerobic and anaerobic conditions creates an ideal environment for the growth of micro-organisms on the surface of the gravel and plant roots. These micro-organisms are largely responsible for the pollutant removal that occurs in ZeoSTP, as they feed on and breakdown organic matter and nutrients, and compete against pathogenic organisms. Earthworms have also been found to inhabit ZeoSTP and assist with the breakdown of organic matter and solids. ZeoSTPs are generally designed to detain the wastewater for a period of minimum 5 days in order to allow sufficient time for the settling and filtering of suspended solids, breakdown of organic matter, binding of some contaminants onto the gravel, and removal of nutrients by plants and micro-organisms. ZeoSTP is based on Fit and forget technology, No need of any maintenance.