A clean production process is typically studied for oily sludge that a typical pollutant marked by a variety of pollution indicators, such as high concentrations of organic pollution and heavy metal pollution. However, it remains difficult to quickly and synchronously remove various pollutants from oily sludge up to now. In order to simultaneously reduce organic pollution and remove heavy metal pollutants on oily sludge, a clean production process needs to be developed. Here, chemical and biological processes: subcritical hydrothermal treatments (SHTs) and biodegradation processes (BPs) were organically integrated to develop a novel collaborative process (NCP). The different SHT and matched optimal conditions for the BPs were discussed, and the results showed that hydrolysis of catalyst under high temperature and high pressure (HHC) is the best set of conditions for obtaining new biodegradable substrate (NBS). These conditions can maximize the strength of the follow-up BPs and optimize the degradation effect of oily sludge based on a pure oxygen aeration-activated sludge process (POAAS) and air aeration-activated sludge process (AAAS). The results showed that the newly NCP process not only synergically enhances the advantages of SHT and BP in reducing organic pollution, with the degradation rate of oil content reaching 96.73% and COD reaching 95.79% within 10 days, but also significantly improves removal rate of typical heavy metals content, including Cd²⁺ up to 79.16%, Cr⁶⁺ up to 88.03%, As³⁺ up to 89.59%, Pb²⁺ up to 89.2% and Ni⁺ up to 70.1%. This study provides important research value for the clean production process on oily sludge with multiple pollution indicators.

含油污泥是一种典型污染物，具有多种污染指标，如高浓度有机污染和重金属污染，通常研究清洁生产工艺。然而，目前仍难以快速、同步地去除含油污泥中的各种污染物。为了同时减少含油污泥上的有机污染和去除重金属污染物，需要开发清洁生产工艺。在这里，化学和生物过程：亚临界水热处理 (SHT) 和生物降解过程 (BP) 有机地结合在一起，以开发一种新的协作过程 (NCP)。讨论了 BP 的不同 SHT 和匹配的最佳条件，结果表明，催化剂在高温高压（HHC）下的水解是获得新的可生物降解底物（NBS）的最佳条件。这些条件可以最大化后续BPs的强度，优化基于纯氧曝气-活性污泥法（POAAS）和空气曝气-活性污泥法（AAAS）的含油污泥的降解效果。结果表明，新NCP工艺不仅协同增强了SHT和BP在减少有机污染方面的优势，10天内含油量降解率达到96.73%，COD达到95.79%，而且显着提高了典型的去除率。重金属含量，包括 Cd 这些条件可以最大化后续BPs的强度，优化基于纯氧曝气-活性污泥法（POAAS）和空气曝气-活性污泥法（AAAS）的含油污泥的降解效果。结果表明，新的NCP工艺不仅协同增强了SHT和BP在减少有机污染方面的优势，10天内含油量降解率达到96.73%，COD达到95.79%，而且显着提高了典型的去除率。重金属含量，包括 Cd 这些条件可以最大化后续BPs的强度，优化基于纯氧曝气-活性污泥法（POAAS）和空气曝气-活性污泥法（AAAS）的含油污泥的降解效果。结果表明，新NCP工艺不仅协同增强了SHT和BP在减少有机污染方面的优势，10天内含油量降解率达到96.73%，COD达到95.79%，而且显着提高了典型的去除率。重金属含量，包括 Cd²⁺高达 79.16%，Cr ⁶⁺高达88.03%，As ³⁺高达 89.59%，Pb ²⁺高达 89.2%，Ni ⁺高达 70.1%。该研究对多污染指标含油污泥的清洁生产工艺具有重要的研究价值。