School of Science and Technology, The Open University of Hong Kong, Hong Kong, China.
School of Chemical Engineering, The University of Queensland, Brisbane, Australia.
Environ Sci Pollut Res Int. 2021 Aug;28(30):40735-40745. doi: 10.1007/s11356-018-2474-4. Epub 2018 Jun 24.
Oil and grease (O&G) in wastewater can be considered as two parts or proportion contained in emulsion which exceeded O&G standard. Most of oil becomes emulsified with water when they pass through grease trap and discharged in the effluents. Thus, it may indicate that either treatment of grease traps or standards for O&G content stipulated in technical memorandum of Water Pollution Control Ordinance (WPCO) do not reflect the actual situation. Existing grease traps should be upgraded to meet the requirements of WPCO. Alternative technologies need to be developed to tackle this unsolved problem. Good management and practices are also important to ensure proper collection and waste recycling rather than just disposing effluent into drains. Collected O&G content can be recycled as valuable products such as biofuel, flotation agent, or other derivatives. This approach not only protects the environment by improving water quality, it also encourages large flow restaurant operators to recycle oil and grease content towards cleaner production.
废水中的油和油脂（O&G）可被视为乳化液中所含的两部分或比例，超过了 O&G 标准。当它们通过隔油池并排放到废水中时，大部分油会与水乳化。因此，这可能表明隔油池的处理或水污染管制条例（WPCO）技术备忘录中规定的 O&G 含量标准并未反映实际情况。现有的隔油池应升级以满足 WPCO 的要求。需要开发替代技术来解决这个未解决的问题。良好的管理和实践也很重要，以确保适当的收集和废物回收，而不仅仅是将废水排入下水道。收集的 O&G 含量可以回收为有价值的产品，如生物燃料、浮选剂或其他衍生物。这种方法不仅通过改善水质来保护环境，还鼓励大型餐饮经营者回收油和油脂含量，以实现清洁生产。
