The influence of microwave irradiation on the increase of waste activated sludge biodegradability

• Autorzy: Bohdziewicz J. , Kuglarz M. , Grubel K.
• Języki publikacji: EN

Abstrakty

EN

The aim of the research project was to establish the most appropriate time of microwave exposure, which ensures effective sludge lysis. The assessment of the sludge disintegration was based on a release of organic (COD) and inorganic (PO43", NH4 , Ca2+, Mg2+) substances into liquid phase as well as the quantity and quality of the biogas produced. It was established that an increase in sludge biodegradability caused by a rise in COD, had a positive impact on the amount of biogas generated. Based on the results obtained, the optimum microwave exposure amounted to 4 min, and was correlated with the sludge temperature of 60°C for the power of 700W and 80°C for power of 900W. As compared to the amount of biogas generated with raw sludge, the optimum exposing time allowed to generate 49% and 60% more biogas at 700W and 900W respectively. Microwave treatment at both powers, did not have an influence on the CH4 content in biogas produced.

PL

Celem badań przedstawionych w artykule było ustalenie najkorzystniejszego czasu oddziaływania mikrofal zapewniającego efektywną lizę nadmiernych osadów czynnych. Stopień dezintegracji osadu oceniano na podstawie zmian zawartości związków organicznych (ChZT) i nieorganicznych (PO43", NH4+, Ca + , Mg2+) w cieczy nadosadowej oraz ilości i jakości wygenerowanego biogazu. Poprawa biodegradowalności osadów wskutek wzrostu stężenia związków organicznych (ChZT) wpłynęła pozytywnie na ilość wydzielanego biogazu. Jako optymalny czas oddziaływania mikrofal na analizowany osad ściekowy uznano czas wynoszący 4 minuty, który odpowiadał temperaturze osadu na poziomie około 60°C dla mocy mikrofal 700W oraz około 80°C dla mocy mikrofal - 900W. Dla czasu tego produkcja biogazu w odniesieniu do ilości biogazu wygenerowanego przez osad surowy wzrosła o 49% (700W) i 60% (900W). Wstępne preparowanie osadu mikrofalami nie wpłynęło na zawartość CH4 w produkowanym biogazie.

Słowa kluczowe

EN

waste activated sludge; biodegradability; disintegration; microwave irradiation; anaerobic digestion; biogas

PL

osad ściekowy; biodegradacja; dezintegrator; promieniowanie mikrofalowe; fermentacja metanowa; biogaz

• Wydawca: Silesian University of Technology
• Czasopismo: Architecture Civil Engineering Environment
• Rocznik: 2011
• Tom: Vol. 4, no. 4
• Strony: 123--130
• Opis fizyczny: Bibliogr. 42 poz.

Twórcy

autor

Bohdziewicz J.

autor

Kuglarz M.

autor

Grubel K.

• Faculty of Energy and Environmental Engineering, Silesian University of Technology, Konarskiego 20, 44-100 Gliwice, Poland,

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