**Document:** Ensign Sewage Treatment Plant Brochure
**Application:** 19/00840/B — Alterations, erection of a front porch and a rear extension and installation of a new septic tank
**Decision:** Permitted
**Decision Date:** 2019-09-26
**Parish:** Michael
**Document Type:** report / drainage_strategy
**Source:** https://planningportal.im/a/29551-michael-harleys-killane-front-porch-rear-extension/documents/1330908

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# Ensign Sewage Treatment Plant Brochure

## ENSIGN PACKAGE SEWAGE TREATMENT PLANT <br> INTENSIVE BIOLOGICAL PROCESSING FOR OFF-MAINS WASTEWATER

![drawing from page 1](https://images.planningportal.im/2019/07/219653.jpg)

Package Sewage Treatment Plant's (or PSTP's) are often a suitable option where groundwater in the surrounding environment is vulnerable, drainage field percolation values are restrictive, or direct discharge to watercourse or surface water sewer is the prefered discharge method.

In addition to the anaerobic digestion taking place in the primary settlement tank (as septic tanks) the Ensign unit allows the clarified water to pass into a second 'aeration' chamber where it is treated to remove the dissolved constituents. Here aerobic bacteria, supported by diffused air and mobile media, ensure full treatment is achieved before the treated effluent (and 'sloughed off' bacteria) flow to a final settlement chamber prior to discharge.
> PSTP's should be sized using the latest version of British Water Flows \& Loads which provides detailed information on sewage production figures and sizing calculations.
> Regulatory authorities for the control of pollution in the UK normally require treatment plants conforming to BSEN12566:3 to be demonstrated as capable of producing a minimum effluent discharge quality of 20:30:20 (Biochemical

Oxygen Demand; Suspended Solids: Ammoniacal Nitrogen in  ), although in certain areas more stringent site-specific qualities may be required
> No surface water should enter the system as this can reduce the system's capacity and cause solids to be flushed out which may prematurely block drainage field or cause pollution
> As with septic tanks sludge should be removed annually or in line with manufacturers instructions

### Mapsh Industries

Units 3-13 Addington Park Industrial Estate Little Addington, Kettering, Northamptonshire NN14 4AS
sales@marshindustries.co.uk | +44 (0) 1933654582
www.marshindustries.co.uk

## Ensign Benefits

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> Tested to BSEN12566:3 and CE-marked to ensure compliance with latest environmental and Building Regulations requirements
> Class-leading effluent quality of 11.5:19.2:8.4 (BOD:SS:NH⁴) ensures discharges well within national consent standards
> Three chamber system correctly sized for separation and retention of solids improves final effluent quality
> Standard or shallow options enable suitability for all site conditions (including driveways - subject to plinth/surround to prevent superimposed loadings)
> Shallow option ideal for groundworks involving bedrock or high water table as the low profile allows for safe, cost effective installation
> Low energy compressors ensure minimal running, maintenance and servicing costs
> High specification bio-media (310m³ per m³) and membrane diffusers ensure even circulation to eliminate 'dead spots'
> Internal recirculation (from final to primary chamber) continues treatment process to provide higher effluent quality whilst balancing flow over 24 hour period or periods of intermittent use
> Integral lifting eyes for improved on-site handling
> Unique 'keying-in' lip to assist anchoring into granular or concrete surround
> Optional extras include patented Polylok filter to further reduce suspended solids and extend life of drainage field; extensions for deep installations; pumped outlets for sites with adverse levels; and many more

## Ensign Specifications

![A technical line drawing labeled 'Typical plan view' depicting a square central structure surrounded by a boundary, likely illustrating a septic tank layout.](https://images.planningportal.im/2019/07/745061.jpg)    All dimensions in mm

## Ensign Shallow Specifications

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*Data sourced from the Isle of Man public planning register under the [Isle of Man Open Government Licence](https://www.gov.im/about-this-site/open-government-licence/).*
*Canonical page: https://planningportal.im/a/29551-michael-harleys-killane-front-porch-rear-extension/documents/1330908*