A vertical continuous flow dephosphorization device and method

Abstract

The invention discloses a vertical continuous flow phosphorus removing device and method. The vertical continuous flow phosphorus removing device comprises a sedimentation tank, a reactor and an adjustable aeration device. The sedimentation tank comprises a water outlet, a sludge and water collecting vessel, a sludge outlet and a sludge particle return hole. The reactor comprises an overflow weir, a flow guide pipe, a sampling hole, a returned sludge inlet and a water inlet. The adjustable aeration device comprises a supporting frame unit, an annular baffle and an aeration ring. The method comprises the steps of firstly, enabling urban sewage to enter an anaerobic region in the reactor through the water inlet, forming intercellular polymers (pha, phb and phv) from an organic carbon source in the sewage by using polyphosphate accumulating bacteria, and meanwhile, absorbing orthophosphate in a water body by cells; then, enabling the sewage to enter an aerobic region, decomposing the intercellular polymers in the polyphosphate accumulating bacteria to generate energy, and meanwhile absorbing the orthophosphate in the water body by the cells to form intercellular orthophosphate; and next, carrying out sludge and water separation in the sedimentation tank, discharging a supernatant solution from the water outlet, returning part of the sludge to the reactor, and discharging the other part of sludge serving as residual sludge. In order to overcome defects of an existing biological phosphorus removing process and device, the invention provides the novel phosphorus removing device and method which are small in floor area, high in phosphorus moving load, good in phosphorus removing effect, low in sludge discharge amount, low in carbon content, environmentally-friendly and economic.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a vertical continuous flow dephosphorization device and method. Background technique [0002] Phosphorus is an important nutrient source for organisms, but excessive phosphorus in water is extremely harmful. The biggest harm is to cause eutrophication of water body, lead to deterioration of water quality, and increase difficulties in the treatment of drinking water; at the same time, it will also cause aquatic organisms to suffocate and die due to the reduction of dissolved oxygen in water, causing damage to the aquatic environment and reduction in aquaculture production. Even destroy. Therefore, in the face of increasingly stringent wastewater discharge standards and increasing phosphorus discharge, economical, reliable, low-consumption, and efficient phosphorus removal methods and processes are particularly important. [0003] Phosphorus removal methods mainly fall...

AI Technical Summary

Problems solved by technology

The traditional A / O process uses the activated sludge method (flocculent sludge) to achieve phosphorus removal. This process occupies a large area, and it is difficult to further increase the phosphorus removal load. At the same time, due to the long settling time, phosphorus release is easy to occur Phenomenon, thus affecting the phosphorus removal effect

In the simultaneous denitrification and phosphorus removal process, due to the difference in the generation cycle of nitrogen and phosphorus removal microorganisms and the competition for carbon sources, the effects of nitrogen and phosphorus removal cannot be optimal.

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