Summary:

The volume of sludge produced in household wastewater treatment plants depends on sewage treatment methods. Other volume of sludge is produced in household treatment plants and another - in collective wastewater treatment plants. In the latter case, the type of technological system related only to the removal of compounds of organic carbon or to the removal of additional compounds of nitrogen and phosphorous are also of concern. The identification of volume of sludge that is being produced is very important from the point of view of its use. In accordance with the current law, the sludge can be used in agriculture or for reclamation of terrains designed for agricultural or non-agricultural purposes. Regardless of the way these terrains will be used, it is indispensable to dewater them and in many cases - also to disinfect them. And there the questions of how to resolve the problem of sludge’s dewatering emerges. First of all, should it be solved within the household sewage treatment plant or within the municipal sewage treatment plant located in the neighbourhood? In the case of the former, one can take into account either the dewater and bags system or fully mechanical facilities.