This onsite wastewater treatment and disposal system catered to a 6,000-square-foot, six-bedroom residence situated in the flood zone in Florida. Recognizing the unique challenges presented by the shallow water table (a mere two feet below the surface during the wet season), the system prioritized a zero-liquid discharge (ZLD) approach, ensuring environmental sustainability and minimizing potential impact on the surrounding ecosystem.
The system employs a septic tank, pre-treatment, and advanced Nayadic treatment unit for the treatment of 610 gallons of sewage/day. While conventional systems rely on trenches to discharge wastewater in land, the flood zone necessitates further polishing of wastewater. To safeguard against potential contamination and ensure compliance with Florida’s stringent Administrative Code, the ZLD system employed a tertiary treatment stage.
Treated water was stored in underground storage tanks for non-potable applications. The concentrated byproducts from the tertiary treatment were directed towards a constructed wetland in the property’s backyard.
This ZLD wastewater treatment system not only ensures compliance with rigorous environmental regulations but also fosters self-sufficiency for this luxurious Florida estate, setting a precedent for sustainable living in a flood-prone region.
The deliverable included
- Feasibility report covering possible treatment technologies and selection criteria.
- Process flow diagram (PFD).
- Utilities flow diagrams.
- Piping & Instrument Diagrams (P&IDs).
- Equipment list.
- Electrical Power Consumption details (Load list).
- Process Equipment Datasheets.
- Preliminary Plot plan / Equipment Layout of the proposed Wastewater treatment Technology/Unit.
- Piping General Arrangement Drawings (aboveground & underground drawings).
- CAPEX and OPEX