Indeed, if you make a calculation of the appropriate mass load, taking into account the total mass or in the apparatus, it turns out the value of 0.33 BPC per 1 kg of active silt, which fits into the norms and explains the good average value of the silt index (Malman’s index), which in This control period remained below 100.
Thus, for the processing of normally loaded wastewater (from 100 to 400 MLL BPKB), combined devices are calculated on the basis of a real mass load from 0.3 to 0.6 kg of BPCB, which is subject to 1 kg of dry weight of active silt. When recounting on a volumetric load, it turns out that the device provides from 1.7 to 3 kg of BPK to be absorbed, 1 m3 of aeration per day. In the case when industrial wastewater, especially overloaded, and polluted are processed in two sequential stages, can increase the volumetric load in the first stage above 4 kgm3 per day. The shape of the design in the form of a canal with the central zone of aeration and two tank dearying zones is usually the most economical, as it allows you to build large -sized devices at a small depth. At the same time, the interfering effect of exhaustion and layers, which are often found in low areas, where cleaning stations are usually built, this also allows you to not reckon with significant reduction in pressure.
Typically, pools have a maximum depth of 4 to 4.5 m; The inclination of both external walls and internal partitions should not be less than 45 ° to avoid the formation of stagnation silt.
The dimensions are calculated taking into account some conditions: the maximum ascending speed during decantation is from 2.5 to 2.7 m2 hours: the volume of aeration corresponds to the minimum stay – within 20 minutes for wastewater wastewater.
Modern methods of work allow you to unite in special teams. Such a process is called the SRO Assignment and includes the preparation of a legal document that will allow the necessary construction or engineering work. Experienced experts will help you draw up all the necessary documents.