Novel MBR biochemical treatment process

Abstract

The invention discloses a novel MBR biochemical treatment process. Sewage is conveyed to a water collecting tank of a sewage treatment plant through a pipeline, large garbage is separated out througha coarse screen, the sewage is lifted to a fine screen area through a lifting pump area, the fine screen area isolates fine garbage, then the sewage flows into a grit chamber, fine sand particles in water are separated from water, and then wastewater enters an MBR biochemical treatment area, enters a disinfection area after being treated, is disinfected and then is discharged. A sludge-water mixture discharged from an aerobic area of the MBR biochemical treatment area firstly passes through a sludge-water separation area to realize simple and rapid sludge-water coarse separation, separated clear water enters a membrane module area, and a separated sludge layer flows back to an anoxic area. A biochemical system keeps running under high sludge concentration and has the advantage of improvingthe biochemical treatment efficiency; and meanwhile, as clear water enters the membrane, the polluted condition of the membrane component is greatly improved. In addition, the system is very small inoccupied area.

Description

Technical field [0001] The invention belongs to the technical field of sewage treatment, and specifically relates to a novel MBR biochemical treatment process. Background technique [0002] Brief description of traditional MBR process flow: [0003] Municipal sewage is transported to the collection basin of the sewage treatment plant through pipelines, and after large pieces of garbage (wood, cloth, plastic bottles, etc.) are removed by the coarse grid, it is lifted to the fine grid area by the lift pump area, and the fine grid area Isolate the small garbage (such as chicken feathers, leaves, etc.), and then flow to the grit tank to separate the larger particles of fine sand from the water, and then the wastewater enters the MBR process biochemical treatment stage. The biochemical treatment stage usually includes anaerobic zone, anoxic zone, aerobic zone and membrane group zone. The wastewater first passes through the anaerobic zone, and with the return sludge outside the system....

AI Technical Summary

Problems solved by technology

[0004] In the traditional MBR membrane process, because the membrane modules are easily polluted, the membrane flux decreases year by year, and the frequency and cost of backwashing increase year by year. The general life of the membrane modules is about 5 years, and they need to be replaced, resulting in high investment and operation and maintenance costs.

Images