Concrete is not always the best building material: BIOWORKS® is increasingly counting on earthen basin type and compact module construction.
Conventional waste water treatment plants are usually made from concrete. However concrete is not cost effective, the construction is time-consuming and expensive. BIOWORKS® offers our clients the chance to use the fundamentally less costly earthen basin construction with HDPE-lining. Here the basin is excavated from the ground and the dug out soil-material is used to build the surrounding dams. The HDPE lining is rolled onto the basin and the seams are welded tight. This type of basin sealing is robust, durable and has been approved now for many decades. It is also providing the client with the safety of latest European quality and security standards and regulations.
Traditional waste water treatment plants commonly are composed from several single concrete basins, which are linked by interconnecting pipework and sometimes even need a pumping stations. The BIOWORKS®-process requires only one basin module which is separated in several single treatment steps. Consequently the clarifier is embedded as well into this module. The main advantages of this embedded design:
Typical earth basin construction with HDPE-lining and embedded clarifier wall
Finished earth basin with HDPE lining and pre-assembled diffuser elements
The traditional clarifier has a circular shape. Especially under high hydraulic load, turbulence in the inlet structure of the clarifier can occur because of high inlet velocities and settling sludge can be stirred up. Sometimes this entrance structure has to be modified with additional baffle plates to calm down these turbulences.
The BIOWORKS®-process is utilizing a rectangular basin form, which optimizes the settling characteristics of the inflowing water. The advantages of this favourable geometry are significant:
Rectangular Basin Clarifier