Sewage treatment device for alternate internal circulation biofilter and method of use thereof
A sewage treatment device and biofilter technology, applied in the field of environmental engineering water treatment, can solve the problems of ineffective denitrification of sewage with low C/N ratio, complex process, etc., and achieve the effects of saving space, simplifying operation management, and simplifying design
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Embodiment 1
[0050] to combine Figure 1-4 , a sewage treatment device with an alternating internal circulation biofilter, comprising a water inlet tank 1 and an aeration unit, it also includes a biofilter and a circulation pipeline, and the biofilter is sequentially arranged as a blank area and a packing layer from top to bottom 4. A partition 5 is arranged in the middle of the area formed by the supporting layer 6 and the water distribution area, the blank area, the packing layer 4 and the supporting layer 6, the left side of the partition 5 is the filter A, and the partition 5. On the right side is filter B; a perforated filter plate 7 is provided between the supporting layer 6 and the water distribution area to facilitate the circulation of sewage between filter A and filter B through the water distribution area; The filler layer 4 contains granular fillers, such as ceramsite and light plastic particles.
[0051] The water inlet tank 1 is arranged on the side of the top of the biologi...
Embodiment 2
[0076] The device of the present invention is used to treat a certain campus domestic sewage, and the sewage flow rate is 50L / d. combine Figure 1-4 , the total height of the biofilter is 1.5m, the total length is 0.5m, and the total width is 0.2m; among them, the water inlet tank 1 is 0.3m high, 0.1m long, and 0.1m wide, and the filter part is 1.5m high. Under laboratory conditions , take the sewage surface load as 0.6m 3 / m 2 d, so the cross-section of the two filter tanks is set to be 0.2m×0.2m; the supporting layer 6 in the two filter tanks is composed of crushed masonry and quartz sand, and the particle size of the crushed masonry in the lower layer is 5-8mm, and the thickness is 0.05m; the particle size of the upper layer of quartz sand is 3-5mm, and the thickness is 0.05m; the filler layer 4 above the supporting layer 6 can be filled with plastic particles and biological ceramsite, among which the plastic particles are light and fluidized The amount of aeration requi...
Embodiment 3
[0081] Treatment of domestic sewage from a campus sewage pipe in Anhui, with a sewage flow rate of 50L / d. In order to treat the domestic sewage of the campus, a sewage treatment device of alternating internal circulation biofilter is proposed, such as Figure 1-4 As shown, its composition structure and usage steps are the same as those in Example 1, wherein, during the operation of this example, the alternating cycle is 2d, and the filler layer 4 is made of lightweight plastic particles.
[0082] Sampling and determination of the influent and effluent water in a typical treatment cycle in the operation process of this embodiment, the influent and effluent water index and the average removal rate are as shown in Table 2:
[0083] Table 2 Influent and effluent indicators of Example 3 Unit: mg / L
[0084]
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Abstract
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