1.) Domestic Septic Tank Biogas System

It is a Household Biogas Septic System that is used to process sewage water and food waste and is mainly composed of a biogas septic tank, a liquid fertilizer storage pool, and the biogas utilization system.

The biogas septic tank is 2m3 in volume and is made with fiber glass reinforced plastic. The biogas septic tank is composed of an upper part and a under part that are connected by screw bolts. The upper parts and under parts can be stacked up for shipment.    

The biogas utilization system is composed of a desulfurizer, a gas storage bag, a gas pump, a solar charger, a pressure gauge, gas pipeline and biogas appliances (stove, rice cooker, lamp and generator etc) .

The system has the following advantages:

1.    No greenhouse gas escape and no smell (all the gases produced are collected and burned)  

2.    Can get clean liquid fertilizer that can be used for gardening. 

3.    Biogas is collected and used.

Easy and quick to install.



2.) BioDisc BE-BL

High Performance Package Sewage Treatment Plants
Residential, Business & Leisure Applications



BioDisc® treatment plants have been designed to provide an engineered package solution to meet a wide range of applications and discharge qualities.

Assured Performance

The nature of wastewater has changed over the last few decades. In recognition of this, Klargester’s unique patented Managed Flow System has been specifically designed to maintain optimum performance despite shock organic loadings and hydraulic surges. The detrimental effects of modern disinfectants and cleaning materials are minimised by the managed flow system.

Commercial Applications

Certain commercial applications, such as pubs, clubs, hotels and industrial units, place additional stresses on the wastewater treatment process. The sewage strength from the cocktail of detergents, cleaners, and chemicals demands a greater treatment capacity than a purely residential application. In such instances Avenam Links can advise on the best possible treatment and BioDisc® can meet your requirements efficiently and cost-effectively.

Process Design

The BioDisc® uniquely provides four separate treatment zones within a single vessel.

Primary Settlement Section: (1) Wastewater enters the primary chamber. Solids and heavy particles, including non-biodegradable items, settle and consolidate into a sludge which requires periodic removal. Liquid still containing some solid particles rises upwards into the Primary Biozone: (2) Discs in this area, rotating at approximately two revolutions per minute, allow oxygen to be absorbed into the developing biofilm as naturally occurring bacteria attach to the discs. These discs provide a highly beneficial pre-treatment area.

Flow Management Device: (3) Forward flow is controlled by a baling device attached to the rotor assembly and a pre-determined volume of partially treated waste is transferred into the secondary disc zone. Incoming flows in excess of the baling device capacity stay in the primary area and it is this that creates hydraulic balancing within the plant. Zones 1 and 2 (as above) between them have a balancing capacity equal to approximately 25% of the design flow of the plant and it is this feature that can allow the plant to retain six hours flow in the event of a power failure. This is now a requirement under the latest Building Regulations Part H2.

Secondary Disc Zone: Flows entering this zone are exposed to a second and separate bank of discs on which grow a further matrix of bacteria. Protected from flow variation and harmful contaminants, the bacteria efficiently use the nutrients in the effluent as a food source.

The rotation of the discs creates a gentle flow path within both disc zones that moves wastewater along the zone and rotation also sloughs ageing or surplus bacteria from the discs creating space for new bacteria to develop.

A key benefit of BioDisc® is that the whole surface area is continually regenerated with new biological growth and that there is constant replenishment as all spent bacteria are flushed into the final settlement zone.

It is often the case with submerged or fixed media treatment processes, that the biological zones become clogged with dead or excessive biological growth, inhibiting treatment and demanding expensive and dirty maintenance.

Final Settlement Zone: (5) The almost fully treated effluent, is displaced from the disc area into the final settlement zone. The final settlement zone is fitted with a simple sludge return pump that transfers the settled material from the base of this zone into the primary settlement zone. This improves process performance by protecting the outlet and returning dilute and active biomass into the primary tank. This feature can be modified for seasonal flow variations.

The final effluent, free from solids and pollutants, exists through the outlet pipe.

Process Features

Consistent Effluent Quality

These plant are designed to achieve an effluent quality of 20mg/l BOD, 30mg/l Suspended Solids and 20mg/l Ammonia on a 95% basis. These BioDisc® can also be configured to produce better standards of effluent quality with Ammonia levels as low as 5mg/l being achievable. Contact Avenam for design support and further information.

Effluent Pumpsets

A septic tank or treatment system pumpset can be used to disperse settled effluent when a site has a high water table or adverse invert levels. Installed after the treatment system and pumping settled effluent up to an inspection chamber, flow to the drainage system then takes place by gravity in the normal way.

* BioDisc® BH-BL only.
**BioDisc® BH-BL only - chain drive on BioDisc® BE-BG.

Biodisc Installation


· Domestic Septic Tank Biogas System

· Integrated Biogas Plant

· Domestic Biogas Plant

· Toilet Linked Biogas system

· Waste to Electricity

Domestic Septic Tank Biogas System


The system is composed of two 10 m3 biogas plants, pipe routes, gas purify devices and gas appliances or small power biogas generator.

The system is mainly applied to domestic house to treat sewage and food waste.

Comparing to normal septic tank domestic septic tank biogas system has the flowing advantages:

1. Biogas is collected and used

2. No smell out 

3. Out water much cleaner and can be used for gardening   

The Biogas Plant is composed of a concrete digester that is built with a steel mould, a glass fibre reinforced plastic gas-holder and a concrete or glass fibre reinforced plastic cover. The digester is 10 m3 of capacity. The gasholder is 1.6 m of diameter, 0.6 m of height and 1 m3 of capacity.