Membrane Based Small Sewage Treatment Plants

"Top of the range small sewage treatment plant with market leading performance."

The BusseMF© is a small sewage treatment plant with submerged microfiltration membranes (Membrane Bioreactors).

The BusseMF© membrane bioreactor process allows for a guaranteed suspended solids free and hygienically safe final effluent that has undergone extensive COD and BOD5 reduction.

Household Sewage Treatment Plants are offered in three ranges:

Standard BusseMF©
The treatment plant is provided as a free standing installation suitable for a frost-free and enclosed room. It is offered in the model series for 4EW and 8 EW.

Old Septic Tanks + BusseMF©
An existing septic tank is upgraded with a BusseMF©.

Group Treatment Plant BusseMF©
Compact solution for apartment buildings, hotels and small communities.

 Areas of application

  • Domestic wastewater treatment plant for use in single and multi-family homes, hotels and farmhouse establishments etc.
  • Mecana Umwelttechnik is the exclusive regional representative for Switzerland
  • Effluents from BusseMF© is highly purified and can therefore be disposed of via infiltration or surface discharge.
  • As a high quality effluent, the wastewater can be used for garden irrigation according to DIN19650.

Special advantages

  • Very good effluent quality
  • High safety standard
  • Low space requirement
  • Adaptable plant size and design
  • Intelligent control
  • Zero odour and noise pollution
  • Entire system is installed and operational in just 1 day
  • High reliability

Construction of the wastewater treatment plant

The domestic sewage treatment plant is modular and consists of two or more double-walled tanks (polyethylene or sheet steel), at least one for coarse material or waste storage (pre-treatment) and a membrane bioreactor (aeration), termed MBR. The containers ensure a high safety standard, enabling the modular structural approach to each plant size and facilitate self-monitoring and maintenance of the sewage treatment plant.

The influent of wastewater enters by the domestic waste disposal pipe via a DN100 connection piece on the container entering the primary treatment. The air is released through the vent ensuring the easy flow of domestic sewage. Initial treatment is carried out by the pre-treatment stage in the chamber with the help of an air lift pump.

Microfiltration membranes, immersed in the aeration tank, are used to separate the activated sludge from the filtrate. The plate membranes consist of a carrier sheet with welded membranes. The nominal pore size is 0.4 microns. There is a support liner providing unhindered transport of the filtrate between the drainage channels support plate and the membrane. Filtrate is drawn off through a nozzle at the top of the diaphragm plate. The required transmembrane pressure is produced by over-pressure of the membranes.

The membranes are located in a module, which has inlet openings and a ventilation device situated in the base of the unit. The treated wastewater flows through the membrane by gravity from the plant into the discharge point or with an optional lifting system. The ventilation facilities of the primary treatment and recovery or the lift pump are powered by two quietly working membrane compressors.

© Copyright 1998-2002 Busse GmbH - Zaucheweg 6 - D-04316 Leipzig

Principle of operation

The treatment method is based on a combination of the activated sludge process with submerged membranes and sedimentation of particulate matter in an upstream reservoir. The intermediate wastewater and coarse material is stored for a set period of time. The control of the system is via a programmable time switch and float switch. The individual container shall have the following function:

Biological treatment

Free of coarse material and floating sludge, wastewater is treated microbiologically in the MBR with the activated sludge process. The oxygen necessary for the biodegradation process comes from the surrounding air using a very quiet running compressor, entering via an aeration devise into the container. The sludge, water, air is mixed and moved using aeration. This air flow is sufficient to prevent a floating layer building up and avoids the formation of deposits. The flow of the wastewater through the media is parallel to the membrane surface. The treated wastewater flows through the microfiltration plates by static pressure and siphon effect (gravity flow). In holiday mode (no domestic waste water inflow to the unit) the controls ensure ventilation intermittently and prevents digestion or a high degree of sludge stabilization. The microfiltration effluent is free of suspended solids meaning a final clarification stage for the treated wastewater is not required.


It is a requirement for these MBR systems that a mandatory maintenance contract is signed with Mecana Umwelttechnik GmbH. This maintenance contract would include, among other things, the exchange of the membranes when required.