Alkaline solubilisation of waste activated sludge (WAS) for soluble organic substrate – (SCOD) production

• Autorzy: Suschka J. , Kowalski E. , Mazierski J. , Grübel K.

Identyfikatory

DOI

10.1515/aep-2015-0012

Warianty tytułu

PL

Tworzenie się rozpuszczalnego substratu organicznego podczas zasadowego rozpuszczania osadów ściekowych

• Języki publikacji: EN

Abstrakty

EN

Improving the effects of hydrolysis on waste activated sludge (WAS) prior to anaerobic digestion is of primary importance. Several technologies have been developed and partially implemented in practice. In this paper, perhaps the simplest of these methods, alkaline solubilization, has been investigated and the results of hydrolysis are presented. An increase to only pH 8 can distinctively increase the soluble chemical oxygen demand (SCOD), and produce an anaerobic condition effect favorable to volatile fatty acids (VFA) production. Further increases of pH, up to pH 10, leads to further improvements in hydrolysis effects. It is suggested that an increase to pH 9 is sufficient and feasible for technical operations, given the use of moderate anti-corrosive construction material. This recommendation is also made having taken in consideration the option of using hydrodynamic disintegration after the initial WAS hydrolysis process. This paper presents the effects of following alkaline solubilization with hydrodynamic disintegration on SCOD.

PL

Zastosowanie wstępnej hydrolizy osadu czynnego wpływa w znaczący sposób na poprawę efektów fermentacji beztlenowej. W pracy przedstawiono wyniki wstępnej alkalizacji osadu. Stwierdzono, że w wyniku wzrostu pH do 8 nastąpiło wyraźne zwiększenie ChZT w cieczy nadosadowej i intensyfikacja produkcji LKT, a zmiana odczynu do pH 10 powoduje zwiększenie efektów hydrolizy. Wykazano, że wstępna hydroliza osadu do pH 9 jest możliwa do zastosowania w praktyce, z uwagi na wykorzystanie materiałów konstrukcyjnych o umiarkowanej odporności na korozję. Po wstępnej alkalizacji możliwe jest stosowanie innych metod dezintegracji osadu. W pracy przedstawiono wyniki kondycjonowania osadu poprzez alkalizacje w połączeniu z dezintegracją hydrodynamiczną.

Słowa kluczowe

EN

alkaline hydrolysis; waste activated sludge; anaerobic digestion

PL

hydroliza alkaliczna; czynny osad ściekowy; fermentacja beztlenowa

• Wydawca: Institute of Environmental Engineering, Polish Academy of Sciences
• Czasopismo: Archives of Environmental Protection
• Rocznik: 2015
• Tom: Vol. 41, no. 1
• Strony: 29--38
• Opis fizyczny: Bibliogr. 19 poz., tab., wykr.

Twórcy

autor

Suschka J.

• Polish Academy of Sciences, Poland Institute of Environmental Engineering

autor

Kowalski E.

• Polish Academy of Sciences, Poland Institute of Environmental Engineering

autor

Mazierski J.

• Polish Academy of Sciences, Poland Institute of Environmental Engineering
• University of Bielsko-Biała, Poland Institute of Environmental Protection and Engineering

autor

Grübel K.

• University of Bielsko-Biała, Poland Institute of Environmental Protection and Engineering

Bibliografia

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