Planning to install a new sewage treatment plant?
Here is an overview of how to go about installing the Tricel Shallow Sewage Treatment Plant UK6-UK50 in just 23 steps:
1 Any installation must be “fit for purpose” i.e. it must suit the ground conditions, which will vary from site to site. This is the responsibility of the onsite contractor.
2 Never roll the tank - tanks should be lifted into position in accordance with supplier’s instructions.
3 The unit should be located as far away from the dwelling as is practicably possible, taking into consideration the topography and pipe work levels. Separation distances must meet all national and local regulations.
4 Dig a hole about 500mm larger than the system in plan.
5 Remove any soft spots or boulders of significant size from the base or sides of the excavation.
6 Any ground water must be pumped out to ensure a dry excavation which should then be lined with polythene.
7 Begin to form the base using compacted gravel which must be flat and level.
8 Construct the base on a thin layer of compacted gravel covered with a 250mm layer of concrete.
9 Ensure gravel/concrete are clean and contain no large materials.
10 Lift tank into position and align as required for connecting pipe work, access shafts etc.
11 Ensure that the correct orientations are achieved by the system, which may contain one or more tanks.
12 Ensure that each tank is 100% level, and that inlet/outlets are correctly orientated.
13 Secure anchor straps if required.
14 Connect any low-level pipe work, as required.
15 Ballast the tank with water.
16 Mount and seal any turret extensions.
17 Commence gravel backfilling (dry site) with 300mm layers approximately up to 50mm over the cylindrical body of the tank, ensuring tank and any pipe work is properly supported. For a wet site, commence concrete backfilling in 300mm layers approximately up to the pipe work level, ensuring tank and any pipe work is properly supported.
18 Continue backfilling with primary material - up to 50mm over the cylindrical body of the tank.
19 Compaction should be by lightweight rollers or a vibratory plate compactor until “traffic” depth has been achieved.
20 Compact evenly around the riser extensions to reduce risk of distortion.
21 Ensure that no surface loadings are transferred from the cover direct to the tank. Cover frame construction should allow for some movement.
22 An access chamber should be installed before and after the tank for sampling and to assist in clearing if possible.
23 If sewage consists of high quantities of grease e.g. from a restaurant, a grease trap may have to be installed on a separate drain prior to the system.
For a more detailed outline of an installation please call us on 01296326111and we will happily supply you with a installation manual.