Effects of zero-valent iron and enzymes on the anaerobic co-digestion of sewage sludge and corn silage

• Autorzy: Zhou Haidong , Cao Zhengcao , Ying Zhenxi , Liu Jicheng , Hu Tao , Zhang Mingquan , Zhang Jingyuan

Identyfikatory

DOI

10.37190/epe200403

• Języki publikacji: EN

Abstrakty

EN

Anaerobic co-digestion of sewage sludge and corn silage with zero-valent iron powder (Fe⁰), cellulase, and papain as reinforcement means was conducted. COD-based feeding ratio of sewage sludge to corn silage was set to 2:1, the solids retention time (SRT) 20 day, digestion temperature 35 °C, and mixing speed 60 rpm. Removal rates of total COD during the control group, and Fe⁰, papain, cellulase, and papain, Fe⁰, and the two kinds of enzyme-added tests were 38.04, 41.02, 34.62, 34.55, 35.42, and 48.21%, respectively. The corresponding biogas production was 2.12, 2.62, 2.22, 2.41, 2.25, and 2.81 dm³/day, respectively. The results indicated the addition of cellulase, and papain could maximize the decomposition and hydrolysis of organic matter in sewage sludge and corn silage to volatile fatty acids. Fe⁰ could reduce the redox potentials of the anaerobic co-digestion, optimize the circumstances of the methanogenesis stage, accelerate biogas production, and improve biogas components. Fe⁰ and enzymes played a synergistic role in the anaerobic co-digestion system. Life cycle assessment indicated that the anaerobic co-digestion of sludge and corn silage co-substrates could benefit the economy, environment, and social development under the synergistic action of Fe⁰ and enzymes.

Słowa kluczowe

EN

corn silage; COD; sewage sludge; anaerobic digestion

PL

kiszonka z kukurydzy; ChZT; osad ściekowy; beztlenowa fermentacja

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Environment Protection Engineering
• Rocznik: 2020
• Tom: Vol. 46, nr 4
• Strony: 41--56
• Opis fizyczny: Bibliogr. 26 poz., rys., tab.

Twórcy

autor

Zhou Haidong

• School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China

autor

Cao Zhengcao

• School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China

autor

Ying Zhenxi

• School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China

autor

Liu Jicheng

• School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China

autor

Hu Tao

• Shanghai National Engineering Research Center of Urban Water Resources Co., Ltd., Shanghai 200082, China

autor

Zhang Mingquan

• School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China

autor

Zhang Jingyuan

• School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).