Preliminary design of wastewater treatment plant for agglomeration Novska

Predmet ovog rada je uređaj za pročišćavanje otpadnih voda trećeg stupnja pročišćavanja, kapaciteta 11.700 ES za aglomeraciju Novska. Na razini idejnog projekta obrađena su tehnološka rješenja i izrađeni hidraulički proračuni za linije vode i linije mulja. Liniju vode čine mehanički predtretmana sa prethodnim taložnikom i biološki tretman sa SBR tehnologijom. Mehanički predtretman čine kanal s grubom rešetkom, ulazna crpna stanica, koja sirove otpadne vode podiže do integrirane linije sa finom rešetkom i aeiranog pjeskolova-mastolovoma, a zatim slijede prethodni taložnik i egalizacijski bazen. Biološki tretman otpadnih voda se provodi u SBR reaktoru, iz kojeg se pročišćene otpadne vode gravitacijski ispuštaju u recipijent. Linija mulja, nastalog nakon biološkog tretmana iz SBR reaktora i prethodnog taložnika, započinje odvođenjem izdvojenog mulja na zgušnjavanje u gravitacijski zgušnjivač, nakon kojeg slijedi aerobna stabilizacija, te konačno zbrinjavanje mulja na poljima za ozemljavanje mulja.The subject of this thesis is a wastewater treatment plant of the third stage of treatment, with a capacity of 11,700 ES for the Novska agglomeration. At the level of the preliminary design, technological solutions were designed and hydraulic calculations for water lines and sludge lines were made. The water line consists of mechanical pre-treatment with pre-settling and biological treatment with SBR technology. Mechanical pre-treatment consists of a channel with a coarse screen, an inlet pumping station, which raises raw wastewater to an integrated line with a fine screen and aerated grit and grease chamber, followed by a primary sedimentation tank and an egalization tank. Biological wastewater treatment is carried out in an SBR reactors, from which the treated wastewater is discharged into the recipient, by gravity. The sludge line, formed after biological treatment from the SBR reactor and primary sedimentation tank, begins with the leading of the separated sludge on thickening at the gravity thickener, followed by aerobic stabilization, and finally the disposal of sludge in the sludge reed beds