Powdered carbon backflow and carbon/sand filter combined process for treating polluted water

Abstract

The invention discloses a powdered carbon backflow and carbon / sand filter combined process for treating polluted water, which belongs to the field of water treatment. A device comprises a mixing tank, a flocculating tank, a settling pond and a carbon / sand filter which are connected in series in turn, wherein powdered active carbon and a coagulant are added in raw water to be treated, and the raw water is mixed with the coagulant in the mixing tank; the mixed raw water enters the flocculating tank to undergo a flocculation reaction and then enters the settling pond to undergo solid-liquid separation, active carbon mud settled in the settling pond is concentrated in a mud storage chamber and flows back to the mixing tank or flocculating tank by a reflux pump, the concentrated active carbon mud flows back to the mixing tank when the coagulant is added and flows back to the flocculating tank when the coagulant is not added; and water after the settlement enters the carbon / sand filter, the granular active carbon is filled on the upper layer of the carbon / sand filter, and quartz sand is filled in the lower layer. In the invention, a powdered carbon backflow process is adopted, so that over 50 percent of medicinal preparation can be saved; and the physical absorption effect, biological degradation effect and strengthening coagulation effect of the active carbon act in coordination, and the carbon / sand dual-layer filter has the physical absorption and biological degradation effects at the same time.

Description

technical field [0001] The invention belongs to the field of water treatment, and in particular relates to a short-flow advanced treatment process for treating polluted source water, in particular to a combined process of powdered carbon backflow and carbon sand filter tank for treating polluted water. Background technique [0002] At present, there are micro-pollution problems in drinking water sources in most areas of my country, especially in frequent outbreaks of water source water seasonal and sudden pollution incidents, trace organic matter, ammonia nitrogen and smell and taste problems seriously threaten the hygiene and safety of drinking water for local residents . my country's new "Drinking Water Sanitation Standard" (GB5749-2006) has been promulgated and implemented on July 1, 2007, and has put forward specific requirements for organic matter, ammonia nitrogen, especially smell and taste. However, the traditional conventional water treatment process has limited rem...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems that most water plants currently have in dealing with slightly polluted source water and dealing with seasonal water source pollution and sudden water pollution incidents, the present invention provides a low-cost, simple transformation, obvious effect, effective removal of trace organic matter, A short-process advanced treatment process for ammonia nitrogen and odor pollutants---combined process of powder carbon reflux and carbon sand filter

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