The Bio-Pac sewage treatment range is designed to serve both domestic and commercial properties that have no access to mains drainage. The units are independently tested and certificated to BS EN 12566-3 and clean the final effluent to a standard far better than the normal British Standards of 20 mg/l Biological Oxygen Demand (BOD) 30 mg/l Suspended Solids and 20 mg/l Ammonia on a 95 percentile basis.

The standard range caters for between 1 and 50 persons with bespoke units catering for up to 300 persons.

The unit offers a very discreet solution to on-site sewage treatment as a small lid is flush with the ground and unlike its rivals; the compressor housing is under the lid with no visually intrusive kiosk. Unique sludge return system designed and tested for low usage periods, offering unparalleled effluent quality in holiday home usage, The Bio-Pac itself is a craftsman built, superb quality (using thicker fibreglass than its rivals), very robust and carries a 25yr guarantee on all GRP parts of the tank.

The Bio-Pac is the answer if you are looking for a top quality, discreet unit with low running costs. It offers outstanding value for money.

The Bio-Pac is a two-chamber unit and consists of a conical tank that contains an inner tank aeration chamber, which is open at the base. The space between the inner and outer tank is the clarifier chamber. A draft tube, positioned 100mm from the base of the clarifier, extends up into the aeration chamber.

Air from the compressor housed under the lid is piped to a diffuser in the draft tube. Raw sewage enters the aeration chamber and air surging up from the draft tube aerates the sewage, causing an aerobic bacterial colony to establish and digest the organic matter. As more raw sewage enters the chamber, an equal amount of effluent displaces through the open bottom into the clarifier. The quiet conditions in the clarifier allow all the suspended solids to sink to the base of the clarifier. They are drawn back up the draft tube by the upward flow of sir, for further digestion in the aeration chamber. A small quantity of settled effluent from the top of the outer clarifying chamber is drawn back into the centre aeration chamber by a simple air lift system, for further digestion. The clear effluent rises to the top of the clarifier and passes over a weir into the outlet pipe. The Bio-Pac constantly recycles the sewage via gravity and the airlift system achieves near total solids digestion. Unlike all other extended aeration plants the unit will function during low usage periods making the unit suitable for holiday lets and other infrequent usages. Unlike other sewage treatment plants that are three stage systems, the Bio-Pac does without primary settlement tank and so can achieve extended intervals of up to 3 to 5 years without emptying.

TESTED AND CERTICATED TO BS EN 12566-3