A process for enriching phb-accumulating bacteria sludge by using activated sludge method
By using the activated sludge method to autonomously metabolize in a low-oxygen environment, PHA bacteria are enriched in situ, solving the problem of high production costs in traditional PHA production. This achieves low-cost PHA production and simultaneous wastewater treatment, and the resulting bacteria have both environmental and commercial value.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-05-25
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional PHA production is costly, relying on large amounts of industrial carbon sources and specialized fermentation equipment. Furthermore, existing wastewater treatment processes cannot achieve low-cost PHA production without external carbon sources, in-situ enrichment, or purification, leading to resource waste and difficulty in widespread adoption.
The activated sludge process is adopted to inhibit ammonification by precisely intermittent oxygen control. It utilizes the activated sludge in the existing wastewater treatment system to autonomously metabolize in a low-oxygen environment and enrich PHA bacteria in situ. The process includes pretreatment, aeration and static sedimentation steps, controlling DO value and temperature, retaining the original organic carbon source, and achieving low-cost PHA production.
This technology enables low-cost PHA production without the need for external carbon sources or fermentation equipment, while simultaneously treating wastewater to meet standards. The resulting PHA sludge can be directly applied or purified to prepare high-purity materials, solving the problem of high costs associated with traditional PHA production and possessing both environmental and commercial value.