{"id":39359,"date":"2023-12-22T11:38:28","date_gmt":"2023-12-22T03:38:28","guid":{"rendered":"https:\/\/www.hkmu.edu.hk\/st\/?p=39359"},"modified":"2023-12-22T11:42:14","modified_gmt":"2023-12-22T03:42:14","slug":"hkmu-innovates-microfluidics-for-real-time-monitoring-of-the-metabolic-activity-of-food-waste-sewage-sludge-anaerobic-co-digestion-to-boost-the-generation-of-renewable-energy","status":"publish","type":"post","link":"https:\/\/www.hkmu.edu.hk\/st\/events\/hkmu-innovates-microfluidics-for-real-time-monitoring-of-the-metabolic-activity-of-food-waste-sewage-sludge-anaerobic-co-digestion-to-boost-the-generation-of-renewable-energy\/","title":{"rendered":"HKMU innovates microfluidics for real-time monitoring of the metabolic activity of food waste\/sewage sludge anaerobic co-digestion to boost the generation of renewable energy"},"content":{"rendered":"\t\t
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\n\t\t\t\n\t\t\t\n\t\t\t\t\t\t\t\t\t\n\t\t\t\tDate: 21 December 2023\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t\t\t\t\t<\/h6>\n\t<\/div>\n\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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Dr Chen Jianlin, Assistant Professor of the School of Science and Technology, and his team invent the \u201cmicrofluidics analytical device\u201d to monitor the bioactivity of \u201canaerobic digestion\u201d in real time and learn about the impact of food waste on the \u201canaerobic digestion\u201d of sewage sludge.<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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As public awareness of environmental protection grows in Hong Kong, food waste is becoming an increasing concern, thus creating demand for food waste recycling and reuse. If large amounts of food waste are not treated properly, it may contaminate the environment. The \u201canaerobic co-digestion\u201d of food waste and sewage sludge produces biogas, but the biological activity of the digestion process requires close monitoring to ensure the smooth operation of \u201canaerobic digestion\u201d, along with the production of biogas. Hong Kong Metropolitan University's (HKMU) School of Science and Technology has developed a \u201cmicrofluidics analytical device\u201d to monitor the bioactivity of \u201canaerobic digestion\u201d in real time and learn about the impact of food waste on the \u201canaerobic digestion\u201d of sewage sludge. Hence, it will help improve the efficiency of waste decomposition and generate renewable energy to convert waste into energy.<\/p>

According to the Environmental Protection Department, most of the food waste in Hong Kong is disposed of in landfills, along with other municipal solid waste. In 2020, about 10,809 tonnes of municipal solid waste was sent to landfills in Hong Kong every day. Food waste accounted for about 30% of this. Earlier, the Government launched the \u201cFood Waste\/Sewage Sludge Anaerobic Co-digestion Trial Scheme\u201d, in which food waste and sewage sludge are subjected to \u201canaerobic digestion\u201d. This method employs microorganisms to digest and decompose the waste in an anaerobic condition. It has been successfully applied in various overseas countries to effectively treat both food waste and sewage sludge. While reducing the amount of waste, the process produces biogas, which can be used to generate electricity and heat for conversion into electrical energy.<\/p>

Funded by the Environmental and Conservation Fund in 2021, Dr Chen Jianlin, Assistant Professor in the School of Science and Technology at HKMU, conducted research on the treatment of food waste. He discovered that when massive amounts of food waste were put into the \u201canaerobic digestion\u201d system, it affects the pH value of the system and results in an imbalance in the microbial community. This causes difficulties in the effective digestion and decomposition of waste, thus undermining the performance of waste treatment.<\/p>

Dr Chen's team applied \u201cmicrofluidics technology\u201d to invent its \u201cmicrofluidics monitoring device\u201d, which is a microchip equipped with a microchannel. By capturing a trace amount of food waste and sewage sludge before \u201canaerobic digestion\u201d, the device can produce a fluorescent response to the microbial activity of \u201canaerobic digestion\u201d, using a special built-in chemical dye. The intensity of the fluorescent response indicates the bioactivity of the \u201canaerobic co-digestion\u201d of food waste and sewage sludge, allowing the operator to determine the effectiveness of the microorganisms in decomposing the waste in real time.<\/p>

Unlike the existing method of laboratory testing, the \u201cmicrofluidics monitoring device\u201d can analyse the effect of different ratios of sewage sludge to food waste on the performance of \u201canaerobic digestion\u201d. This helps monitor the decomposition of waste faster and more efficiently.<\/p>

After repeated tests, the research team found that the ratio of sewage sludge to food waste can be adjusted to maximise the capability of the sewage sludge to undergo \u201canaerobic digestion\u201d, thus achieving the optimum waste treatment outcome. Unlike \u201canaerobic digestion\u201d of sewage sludge alone, the addition of food waste to the process generates more biogas, which can be recycled and converted to produce more electricity.<\/p>

Dr Chen said he believes this research will help enhance the stability of food waste treatment in an anaerobic digester and the efficiency of generating renewable energy. He said, \u201cThe research results reflect the potential application of microfluidics technology in real-time monitoring of 'anaerobic digestion' processes. For example, the monitoring bioactivity of 'anaerobic co-digestion' of food waste and sewage sludge in this study enables better utilisation of food waste and the conversion of waste into energy. We hope that the findings can be applied in the community and that the 'microfluidics technology' can be extended to other areas, thus contributing to improved waste treatment and environmental protection.\u201d<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Dr Chen conducts a research on food waste treatment.<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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The \u201cmicrofluidics analytical device\u201d is a microchip equipped with microchannel. By capturing a trace amount of food waste and sewage sludge, the device can produce a fluorescent response to the microbial activity with a built-in special chemical dye.<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

Date: 21 December 2023 Dr Chen Jianlin, Assistant Professor of the School of Science and Technology, and his team invent the \u201cmicrofluidics analytical device\u201d to monitor the bioactivity of \u201canaerobic digestion\u201d in real time and learn about the impact of food waste on the \u201canaerobic digestion\u201d of sewage sludge. As public awareness of environmental protection...<\/p>\n","protected":false},"author":521,"featured_media":39364,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_expiration-date-status":"","_expiration-date":0,"_expiration-date-type":"","_expiration-date-categories":[],"_expiration-date-options":[]},"categories":[44,45],"tags":[],"yoast_head":"\nHKMU innovates microfluidics for real-time monitoring of the metabolic activity of food waste\/sewage sludge anaerobic co-digestion to boost the generation of renewable energy - School of Science and Technology - Hong Kong Metropolitan University<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.hkmu.edu.hk\/st\/events\/hkmu-innovates-microfluidics-for-real-time-monitoring-of-the-metabolic-activity-of-food-waste-sewage-sludge-anaerobic-co-digestion-to-boost-the-generation-of-renewable-energy\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"HKMU innovates microfluidics for real-time monitoring of the metabolic activity of food waste\/sewage sludge anaerobic co-digestion to boost the generation of renewable energy\" \/>\n<meta property=\"og:description\" content=\"Date: 21 December 2023 Dr Chen Jianlin, Assistant Professor of the School of Science and Technology, and his team invent the \u201cmicrofluidics analytical\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.hkmu.edu.hk\/st\/events\/hkmu-innovates-microfluidics-for-real-time-monitoring-of-the-metabolic-activity-of-food-waste-sewage-sludge-anaerobic-co-digestion-to-boost-the-generation-of-renewable-energy\/\" \/>\n<meta property=\"og:site_name\" content=\"School of Science and Technology - 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