Biological Purification Systems of active sludge: “simplified outline”

There are systems of small and medium capacity for which it makes sense to render the conduction as easily and simply as possible. The purification cycle is the type of active sludge in the “simplified outline” in which the primary sedimentation phase is abolished, and the sewage waters, after the normal preliminary treatment, is then sent directly to the biological phase of aeration. It was verified that, in the event of intermittent drainages (food industries such as cheese factories, canneries, sausage factories, wine cellars, slaughterhouses, schools, colleges, isolated communities, etc.) with intermittence that externalizes in practically empty cargos in certain hours (for example during the night) or on certain days of the week (during holidays and weekends), the phases of primary sedimentation is cause for serious difficulties for the systems that are so equipped, since the long periods of detainment, during the periods of reduced or empty cargo, provokes the fast anaerobic fermentation, with formation of noxious odors, arising from sludge from the bottom, etc.

Our systems introduce the following advantages:

• Great security of operation;
   

• Smaller land surfaces for the system;
   

• Great simplification in the exercise of the system;
   

• Prefabrication subdivided on the inside into several compartments according to the organic portion to be abated;
   

• Systems prefabricated with monolithic elements;
   

• Maximum guarantee of hydraulic seal, structural stability and resistance over time to the corrosive action of the sewage waters;
   

• Possibility of upgrading and expanding in order to prepare for eventual variations of the polluting cargo;
   

• Plant components are selected among the products of greatest quality and reliability available on the market, and their dimensions and methods of installation allow the purification cycle to go into effect under conditions of maximum security against the pollution risks to the receiving body of water.

The differentiation from the traditional system is constituted from the fact that the surplus activated sludge comes from the secondary sedimentation unit (fresh sludge), instead of enduring a treatment of anaerobic stabilization, and is subjected to one aerobic digestion.