Tunnel Ventilation | Sewage Plant Design
Sewage Plant Design from Naston
Naston are experienced engineers in the field of Sewage Plant design and installation. Our engineers can conduct detailed site surveys before using specialist CAD technology to design a package of plant to meet the needs of the project. In order to ensure an appropriate and flexible response, Naston has developed a variety of technologies and approaches to different projects. A sample of the main sewage treatment package plants is below.
Constant Transfer System
Our Constant Transfer System is a very flexible sewage plant design that has been used in many different settings including in Africa. The plant comes in a pre-fabricated form, is easy to assemble and operates reliably with minimal maintenance. The constant transfer system has a relatively low footprint and, being an odour free process, can be situated indoors or outdoors as required.
The advantage of constant transfer sewage plant design is that it operates at a continuous steady rate, offering advantages of efficiency and can handle a wide variety of volumes. Adding additional modules can further increase capacity as well as cater for different standards of final treatment quality.
An example of a constant transfer system would be the system created for Panaqua Process Ltd in Algeria
Sequence Batch Reactor (SBR)
The Sequence Batch Reactor is another type of sewage plant design offered by Naston. This offers single tank treatment, ideal for smaller works.
The SBR Process in Industrial Effluent Treatment
The SBR is a batch activated sludge process which incorporates primary settlement, activated sludge treatment and final clarification all in a single tank. This reduces the overall footprint of the plant and simplifies process control.
The SBR process uses three basic steps:
Fill/Aerate - Raw sewage is combined with mixed liquor from the aeration zone in the biological selector. It then flows into the aeration tank where oxygen is added and biological treatment occurs.
Settle - The flow into the plant is stopped and the suspended biomass is allowed to settle.
Decant - Clear, treated effluent is decanted out of the tank, leaving the biomass in the aeration zone.
The whole sequence normally takes four hours but a three-hour operation can be used during short periods of high flow.
For an example of how SBR was incorporated into an industrial effluent treatment project see our case study of JE Hartley.
COMPAK
The Naston COMPAK range of sewage treatment package plants are highly flexible self-contained water treatment packages which can quickly meet the domestic water needs of up to 50,000 people. The Naston COMPAK range are designed within steel frames of comparable size to a standard container, making the easy to handle and transport. The Compak modules include a service module containing a backup power generator, plant controls/electrical switch gear and the chemical dosing element of the system.
Typically COMPAK units can be up and running within hours of arrival on site - making them an ideal water treatment solution where a rapid response is required.
You can find out more about the Naston Ltd profile as well as the products and services available by following the links below.
