The sludge from physicochemical wastewater pretreatment of low-tonnage production installations

• Autorzy: Rauckyte-Żak T. , Żak S.

Identyfikatory

DOI

10.2429/proc.2018.12(1)006

Warianty tytułu

PL

Osady z fizykochemicznego podczyszczania ścieków z instalacji małotonażowych produkcji

• Konferencja: ECOpole’17 Conference (4-7.10.2017 ; Polanica Zdrój, Poland)
• Języki publikacji: EN

Abstrakty

EN

The results of the assessment of sludge generated in the processes of physicochemical treatment of processing effluents from low-tonnage productions in the installations dedicated to the disposal of such type waste are presented here. It was selected two typical installations of wastewater physicochemical pretreatment of similar instrumental and processing configuration, on which sludge were generated and evaluated. These systems consisted of a storage-averaging tank equipped with belt scrapers light liquid fractions, processing reactor and pressure dewatering units of sludge in chamber filtering presses. Physicochemical pretreatment on these installations were conducted with the use of neutralization, chemical precipitation and coagulation with final thickening using bentonites and/or flocculants. In view of significant differentiations of wastewater types introducing onto the installations in question and the composition of their loads, the obtained sludge were characterised by heterogeneity and different susceptibility to dewater. This study presents the results of a leaching procedure TCLP made for selected sludge samples and the risk assessment using the RAC code. On the basis of chemical analyses, it was found that in the process of selecting the methods of physicochemical pretreatment the effluents one has also to take into consideration the quality of sludge generated as the result of wastewater processing, i.e. the leachability levels of metals from them should be relatively minimal, and the sludge generated and dewatered should be of the lowest risk according to the RAC classification.

PL

Przedstawiono wyniki oceny osadów generowanych w procesach fizykochemicznego podczyszczania ścieków przemysłowych z małotonażowych produkcji na instalacjach dedykowanych do unieszkodliwiania tego rodzaju odpadów. Dwie wytypowane instalacje fizykochemicznego podczyszczania o podobnej konfiguracji aparaturowo-procesowej, na których generowano osady poddane ocenie, składały się ze zlewnych zbiorników magazynująco-uśredniających zaopatrzonych w zbieraki taśmowe frakcji cieczy lekkich, reaktorów procesowych oraz zespołów ciśnieniowego odwadniania osadów na komorowych prasach filtracyjnych. Fizykochemiczne podczyszczanie na tych instalacjach prowadzono z zastosowaniem neutralizacji, strącania chemicznego i koagulacji z końcowym zagęszczaniem bentonitami i/lub flokulacyjnie. Z uwagi na znaczące zróżnicowanie rodzaju ścieków kierowanych na przedmiotowe instalacje i zawartych w nich ładunków również uzyskiwane osady charakteryzowały się niejednorodnością oraz różną podatnością do odwadniania. W pracy przedstawiono wyniki z przeprowadzonej procedury wymywalności TCLP dla wytypowanych próbek osadów oraz ocenę ryzyka, stosując kod RAC. Na podstawie wykonanych analiz stwierdzono, że w wyborze metod fizykochemicznego podczyszczania należy również kierować się jakością uzyskiwanych osadów poprocesowych w takim wymiarze, aby poziomy wymywalności z nich metali ciężkich były relatywnie minimalne, a generowane i odwodnione odpady klasyfikowane jako najbardziej bezpieczne według kodu klasyfikacji RAC.

Słowa kluczowe

EN

processing effluents; low-tonnage production; physico-chemical wastewater pretreatment; sludge; TCLP; fractional composition; heavy metals; risk assessment code; RAC

PL

ścieki technologiczne; małotonażowe produkcje; fizykochemiczne podczyszczanie; osady; TCLP; skład frakcyjny; metale ciężkie; kod oceny ryzyka; RAC

• Wydawca: Towarzystwo Chemii i Inżynierii Ekologicznej
• Czasopismo: Proceedings of ECOpole
• Rocznik: 2018
• Tom: Vol. 12, No. 1
• Strony: 63--75
• Opis fizyczny: Bibliogr. 45 poz., tab.

Twórcy

autor

Rauckyte-Żak T.

• Faculty of Chemical Technology and Engineering, University of Science and Technology, ul. Seminaryjna 3, 85-326 Bydgoszcz, Poland

autor

Żak S.

• Faculty of Chemical Technology and Engineering, University of Science and Technology, ul. Seminaryjna 3, 85-326 Bydgoszcz, Poland

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Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).