Sewage Treatment Plant for Domestic and non-domestic sewage treatment of 6 people or 4 bedroom house or dwelling.

The Harlequin CAP6 is a compact sewage treatment plant designed specifically for domestic installations for up to 6 inhabitants (4 bedrooms). It is a Continuous Aeration Plant which operates using a unique bio-media system and delivers a pollutant removal level of 96.2% whilst also combating common problems associated with small packaged domestic plants.

EN12566-3 Certified - The CAP6 Tank has 3 internal Chambers.

Chamber 1 is for Primary Settlement:

Raw sewage flowing to the CAP unit is received in the primary settlement zone. Here, gross solids (primary sludge) settle to the bottom of the tank, where they remain until the tank is emptied. The settled sewage displaced from the primary zone then flows into the submerged filter zone, passing under a scum baffle.

Chamber 2 is the Reactor Vessel:

Flow circulation in the submerged filter zone is generated by the hydraulic effect of the outlet air diffuser. This causes settled sewage entering the filter zone at a high level to be drawn down through the media, aerating the sewage in the process. The flow circulation ensures that the influent sewage receives several passes through the filter bed at low flow.

In the filter zone, as the sewage passes over the filter media it is purified by micro-organisms growing on the surface of the media. Growth of these micro-organisms results in an excess which is shed as solid particles known as humus solids. Humus solids settling at the bottom of the filter zones are recirculated with the flow of incoming sewage and are deposited on the top of the primary settlement zone.

Chamber 3 - Final Settlement:

Sewage displaced from the submerged filter zone flows via a DIP pipe into the final settlement zone. Liquid displaced from the humus zone has now been fully treated and is known as final effluent. It is suitable for discharge to a watercourse or soakaway as defined in the consent to discharge issued by the Environment Agency.

Humus solids from the final settlement tank are recirculated to the primary tank via the recirculation pipework. This helps reduce the sludge build up in the humus tank and prevents stagnation during very low inflow.

BENEFITS

Bio Media System

Similar to the MBBR system, there is no fixed media eliminating blockages that are commonly found in smaller treatment plants.

Durable & Stable Product

Made from tough durable polyethene, it is easy to transport and has a wide base for stability.

Saves Money

With an easy installation due to the systems compact size and lightweight, it also promotes low maintenance reducing costs.

Easy Maintenance

At full occupancy, the system only needs to be emptied every 6 months, with the maintenance of the compressor easily carried out located in the neck of the tank.

Compact System

A perfect compact solution for homes of up to 6 inhabitants (4 bedrooms).

Low Noise

With a near-silent air compressor housed beneath the flat lid, the operation of the system is virtually silent.