30mᵌ/day Stormwater Tank

The commercial busines park is located on the foreshore of Onetangi Beach, Waiheke Island. The park consists of several business’s made up of a café, restaurants, apartments and hotel accommodation. The Wastewater from these buildings is conveyed via either gravity, septic tanks or pump stations and terminates in the new communal Treatment Plant. The existing SBR Wastewater Treatment Plant was built early 2000 and was no longer meeting consent conditions. It had become a hazard due to hydrogen sulfide attack and continuous failing pumps and aerators. Maintenance was required on a daily basis, It had reached its useful life and needed to be replaced. In order for the communal plant to become compliant it would require full replacement. (Image of failing plant below) Wastewater Tank Case Study: Waiheke Business Zone 30mᵌ/day Stormwater Tank

Project Data Installation Date November 2020 Purpose Commercial Wastewater Treatment Wastewater Production Café, Restaurants, Hotels Final Designation Communal Treatment Plant Consented Design GWE Engineering Installation Contractor Water Projects Design Architect Brent Time to Install 4.0 days Size 30.m3 per day Primary Tank Volume 3 x 25,000l SBR Tank Volume 3 x 25,000l Irrigation Tank Volume 1 x 25,000l UV 0,10kW operating at 11.77 hours per day Disposal Low Pressure Dripper Line in Perforated Drain coil Disposal Field Size 1,000m2 System Compressor KDT 3.100 operating at 13.7 hours per day