A kind of filler for high-efficiency anti-clogging bioretention system
A bioretention and anti-clogging technology, applied in biological water/sewage treatment, granular microbial carrier treatment, water pollutants, etc., can solve the problem of large fluctuation range of pollutant removal rate, unsatisfactory nitrogen and phosphorus removal effect, Filling soil is prone to clogging and other problems, and achieves the effects of non-toxic and tasteless water retention capacity, improved removal capacity, and improved percolation capacity
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preparation example Construction
[0019] The preparation method of biological ceramsite is as follows:
[0020] (1) Preparation of biological ceramsite shell:
[0021] S1. Use municipal dry sludge, ferric chloride, fly ash and clay to mix to obtain powder, ferric chloride is 1.0% of the weight of municipal dry sludge, and fly ash is 120% of the weight of municipal dry sludge. The clay is 50% of the weight of the municipal dry sludge, and the particle size of the powder is less than or equal to 0.09mm; the polystyrene foam particles are used as the template, the polystyrene foam is a sphere, and the particle size of the template is 2~8mm; the water content of the municipal dry sludge The rate is 8.0%;
[0022] S2. dipping a layer of carboxymethyl cellulose solution with a mass concentration of 1.2% on the template;
[0023] S3. Then put the template of S2. into the powder, so that the surface is covered with a layer of powder with a thickness of 0.3~0.5mm;
[0024] S4. Then put the template of S3. into the b...
Embodiment 1~7
[0034] A filler for a bioretention system, the filler includes a filler matrix and bio-ceramic, and the bio-ceramic includes a hollow bio-ceramic shell and a sodium polyacrylate superabsorbent resin filled in the bio-ceramic shell, The biological ceramsite shell is provided with 3 openings, and the filler matrix is formed by mixing cattail matrix soil and fine sand. The specific parameters are shown in Table 1.
[0035] Table 1
[0036] serial number Bio-ceramic volume / cm 3
Embodiment 8
[0038] The difference between this example and Example 7 is that the filler matrix also contains 3% iron powder by mass of the matrix.
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