Modern sanitary wastewater treatment systems on cruise ships

U radu su prikazana glavna obilježja jednog modernijeg sustava za gospodarenje sanitarnim vodama na brodovima za kružna putovanja. Prilozi, amandmani i konvencije međunarodne zajednice ujedinjene pod MARPOL-om daju jasna pravila, vrijednosti i minimalne karakteristike sustava kako bi udovoljio strogim standardima. Na osnovu pregleda izdaju se dozvole za plovila koje se obnavljaju i dozvoljavaju upotrebu sustava za obradu otpadnih voda na brodovima. Procesi samog sustava, iako izgledom i veličinom robustan, su osjetljivi na vanjske utjecaje te mogu naštetiti fizikalno-kemijskim i biološkim procesima unutar sustava. Na tržištu postoje različite tehnologije obrade sanitarnih voda sa različitim pristupom u modulima sustava. Minimalne devijacije zadanih graničnih vrijednosti zaustavljaju rad i zadaju probleme prilikom plovidbe obalnim područjima. Moduli su svaki za sebe posebna jedinica i nema redundancije za slučaj izazova ili zastoja u radu. Prikazan sistem, Scanship AWP, je naknadno ugrađen na brodu za kružna putovanja te dokazuje da se moderniziranje sustava može dogoditi i nakon izgradnje broda te tako poboljšati zaštita okoliša tijekom eksploatacije.The thesis presents the main elements of a modern system for sanitary water management on cruise ships. The annexes, amendments and conventions of the international community united under MARPOL provide clear rules, values and minimum characteristics of the system in order to meet strict standards. Based on the inspection, permits for vessels are issued and are renewed to allow the use of wastewater treatment systems on ships. The processes of the system itself, although robust in appearance and size, are sensitive to external influences that can harm the physico -chemical and biological processes within the system. There are different sanitary water treatment technologies on the market with different approaches for the system modules. Minimal deviations from the limit values stops the operation and creates challenges while navigating inside coastal waters. The modules are each a separate unit and there is no redundancy in case of any challenges or downtime. The system shown, Scanship AWP, was installed in the cruise ship at a later date and shows that the modernization of the system can take place after the construction of the ship, thus improving the level of environmental protection during operation