Domestic sewage treating underflow ecological bed method and apparatus
An ecological bed and subsurface flow technology, applied in biological water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., to achieve the effect of saving a lot of investment and operation management costs, saving energy, and saving water resources
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[0030] Such as figure 1 As shown, the sewage is first pretreated through the anaerobic treatment tank 1. The anaerobic treatment tank 1 is a fully sealed structure made of waterproof materials or brick-concrete, and the sewage is naturally anaerobically fermented in it to remove BOD. 5 , COD, and SS enter the bio-carbon filter 3 through the outlet pipe A2. The bio-carbon filter 3 is made of waterproof material or brick-concrete, and is filled with organic biological materials such as bamboo, wood, pine nuts, reeds, and walnut shells. As filter materials, these materials have a large specific surface area, which can not only form biofilms, but also provide carbon sources for denitrification, reduce the content of nitrogen and phosphorus in sewage, and enter the new subsurface ecological bed 6 through the outlet pipe B5; Bed 6 is made of waterproof material or brick-concrete, the bottom is filled with 100mm-thick concrete, 100mm-thick gravel, 400mm-thick cinder, 100mm-thick grav...
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