Composite flow regime (multi-stage multiphase) reactor principle

Composite flow regime (multi-stage multiphase) reactor principle

The use of a fully mixed flow inside a single reaction chamber enhances the good contact of the microorganisms with the influent substrate to facilitate the biochemical reaction. The push flow between multiple reaction chambers is formed to form a high mass transfer driving force, which improves the reaction rate, treatment effect and processing capacity of the system.

The push-flow reactor has a greater mass transfer driving force than a fully mixed-flow reactor. Under the same conditions, the push flow fluidized reactor can achieve better treatment results than the fully mixed fluid state reactor.

In the flow state of N series-connected fully mixed reactors, when N=1, it is a complete mixed flow, and when N tends to ∞, it is a push flow.

Composite flow regime (multi-stage multiphase) reactor principle
Mono dynamic equation

Performance comparison between DBF + FBAC and MBR systems

項目 DBF + FBAC MBR
建造費用 土建工程 土建量小 土建量小
建造費用​ 機電、自控設備 自控儀錶多,機電技術層次高 自控儀錶多,機電技術層次高
建造費用​ 總投資 相對較小 相對較大
運行費用 曝氣量 比活性污泥法低30%~40% 比活性污泥法略低
運行費用 污泥迴流 不需污泥迴流 不需污泥迴流
運行費用 總運轉費用 很高
運行費用​ 維護費用 一般 非常高
處理效果 體現優勢 體現在提高微生物量、建立優勢菌群以及強化水力傳質架構。 體現在固液分離性能的大幅改善而提高微生物量,並未改變生化本質。
處理效果​ 傳質能力 優良 一般
處理效果​​ 出水水質 優良 優良
處理效果​​ 污泥膨化 易發生,需加生物選擇性物質防止
處理效果​​​ 衝擊負荷的影響 具備內循環加上多級架構,相對具備優良的耐日常衝擊負荷的能力 較傳統活性污泥法好
處理效果 溫度變化的影響 多段和封閉性結構,不易受低溫影響 處理效果易受低溫影響
處理效果​ 性價比 +++ ++

Example: concentration organic wastewater treatment process

High concentration organic wastewater treatment process