@article{f6a45ec39ecb4e04845988b31d76901f,
title = "Biorefinery potential of chemically enhanced primary treatment sewage sludge to representative value-added chemicals - A de novo angle for wastewater treatment",
abstract = "Chemically enhanced primary treatment (CEPT) is an emerging sewage treatment strategy due to its high efficiency and small land requirement. CEPT sludge can be easily dewatered and used for energy recovery through incineration. However, with large amount of reusable nutrients (40% organic carbon, 23% lipids, and 17% protein), the value of CEPT sludge may have been underestimated. In this study, the biorefinery potential of CEPT sludge has been proven via production of 28.9 g/L ethanol or 50.3 g/L lactic acid (LA) or 1.43 filter paper unit (FPU)/mL cellulase from 10 g of CEPT sludge experiment. Inhibition on cell growth and potential inhibitors from plasticizers, pharmaceuticals, and surfactants were determined. Nevertheless, production titer was not affected or performed even better than the non-inhibitors controls. CEPT sludge showed significant potential in biochemical conversion, and the related products may offer an opportunity to support wastewater treatment toward sustainability and carbon neutrality.",
keywords = "Cellulase, CEPT sludge, Circular economy, Ethanol, Lactic acid",
author = "Houde Jing and Huaimin Wang and Lin, {Carol Sze Ki} and Huichuan Zhuang and To, {Ming Ho} and Leu, {Shao Yuan}",
note = "Funding Information: This study and the research staff were supported by the Hong Kong University Grants Committee, Research Grants Council, General Research Fund ( GRF 15212319 ); Innovation and Technology Fund ( ITS 188/15FP & GHP/042/18GD ); and the Research Institute for Sustainable Urban Development (RISUD, PolyU 1-BBW6 ) of the Hong Kong Polytechnic University. The authors acknowledged Dr. Pui-kin So from University Research Facility in Life Science, The Hong Kong Polytechnic University for assistance in UPLC-QTOF/MS analysis. The authors also thank Dr. Kenneth Yan and the University Research Facility in Chemical and Environmental Analysis (UCEA) for sample analysis. Funding Information: This study and the research staff were supported by the Hong Kong University Grants Committee, Research Grants Council, General Research Fund (GRF 15212319); Innovation and Technology Fund (ITS 188/15FP & GHP/042/18GD); and the Research Institute for Sustainable Urban Development (RISUD, PolyU 1-BBW6) of the Hong Kong Polytechnic University. The authors acknowledged Dr. Pui-kin So from University Research Facility in Life Science, The Hong Kong Polytechnic University for assistance in UPLC-QTOF/MS analysis. The authors also thank Dr. Kenneth Yan and the University Research Facility in Chemical and Environmental Analysis (UCEA) for sample analysis. Publisher Copyright: {\textcopyright} 2021 Elsevier Ltd",
year = "2021",
month = nov,
doi = "10.1016/j.biortech.2021.125583",
language = "English",
volume = "339",
journal = "Bioresource Technology",
issn = "0960-8524",
publisher = "Elsevier Ltd",
}
