Possibility of sewage sludge and acid whey co-digestion process

• Autorzy: Zielewicz E. , Tytła M. , Liszczyk G.
• Języki publikacji: EN

Abstrakty

EN

In this study the possibility of acid whey and municipal sewage sludge co-digestion as well as biogas production were investigated. The experiment was conducted in static conditions in co-digestion installation for 32 days. In order to determine the influence of acid whey addition on methane fermentation, the following acid whey doses 0; 20; 40; 50; 60 ml in 400 ml of final mixture volume were applied. Process efficiency was determined based on volatile solids reduction and biogas production. The results indicate that acid whey doses do not improve co-digestion process. Despite of high volatile solids reduction (from 36.8 to 42.9%) and desirable pH values (6.9-7.5), other parameters: chemical oxygen demand (COD), volatile fatty acids (VFA), total phosphorus (PTOT) concentrations did not achieve required values. Biogas production rate also confirmed that the applied whey doses do not allow for high co-digestion process effectiveness. Therefore, to enhance co-digestion, smaller doses of acid whey or longer process duration should be used.

PL

Celem pracy było zbadanie możliwości kofermentowania serwatki kwaśnej z miejskimi osadami ściekowymi oraz ilości wytworzonego w procesie biogazu. Eksperyment prowadzono w instalacji do kofermentacji w warunkach statycznych przez okres 32 dni. Udziały serwatki w kofermentowanym osadzie wynosiły kolejno: 0; 20; 40; 50; 100 ml w 400 ml badanej próby. Efektywność procesu była określana na podstawie redukcji suchej masy organicznej (36.8-42.9%) i ilości wydzielonego biogazu. Pomimo wysokiego stopnia redukcji suchej masy organicznej oraz pożądanych wartości pH po procesie (6.9-7.5), wartości innych parametrów tj. chemicznego zapotrzebowania na tlen (ChZT), lotnych kwasów tłuszczowych – (LKT), fosforu ogólnego (Pog), a także stopnia produkcji biogazu wykazały, że fermentacja metanowa przy zastosowanych dawkach serwatki nie przebiegała efektywnie. W związku z tym w celu zwiększenia efektywności procesu kofermentacji konieczne jest zastosowanie mniejszych dawek serwatki kwaśnej lub wydłużenie czasu trwania procesu.

Słowa kluczowe

EN

sewage sludge; acid whey; methane fermentation; co-digestion; biogas

PL

osad ściekowy; serwatka kwaśna; fermentacja metanowa; kofermentacja; biogaz

• Wydawca: Silesian University of Technology
• Czasopismo: Architecture Civil Engineering Environment
• Rocznik: 2012
• Tom: Vol. 5, no. 1
• Strony: 87--92
• Opis fizyczny: Bibliogr. 22 poz.

Twórcy

autor

Zielewicz E.

autor

Tytła M.

autor

Liszczyk G.

• Faculty of Energy and Environmental Engineering, The Silesian University of Technology, Konarskiego 18, 44 -100 Gliwice, Poland,

Bibliografia

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