Hatch commissions aerated lagoon/wastewater treatment plant
Hatch recently designed and commissioned an aerated lagoon and a wastewater treatment plant for the Warrumbui Conference Centre in New South Wales, Australia.
The 190-E.P. (equivalent person) partially-mixed aerated lagoon (PMAL) and constructed wetlands wastewater treatment plant system had a capital cost of A$130,000. A comparable 190-E.P sewage treatment plant would have cost A$400,000.
Working within Hatch's framework of sustainability principles and providing the requirements for the client, the PMAL was designed and developed to achieve an effluent quality of 20/30-mg/L BOD5/Suspended Solids and <200 E.Coli orgs/100 ml for the final effluent.
Hatch’s scope of services included design, project management, construction, operations, maintenance, testing commissioning and preparation of the technical, civil and mechanical specifications, and an operations and maintenance manual.
Advantages of the PMAL and reed bed include:
- Low construction and operational costs (power costs estimated at A$400/annum)
- Ideally suited for mining communities, small rural towns and indigenous housing communities
- A reduction of greenhouse gases
- Ability to cater the system to large flows and treat industrial wastes
- The removal of sludge from the lagoon will not be required for at least 10 years
- The final effluent is classified as a Class D effluent which is suitable for irrigation
- Solar panels can be used at an additional A$13,000
- posted March 9, 2009
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