Constructed wetland composite filling material for water treatment and preparation method thereof
A technology of artificial wetlands and composite fillers, applied in biological water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., to achieve the effects of good hydrophilicity, high porosity, and large specific surface area
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[0024] The method for preparing artificial wetland composite filler of the present invention, comprises the following steps:
[0025] 1) The remaining sludge from the municipal domestic sewage plant and the red mud from the alumina industrial waste are dehydrated, dried, and pulverized with a pulverizer until the particle size is 80-200 mesh. The straw is crushed and carbonized with a carbonization furnace.
[0026] 2) Mix the red mud, sludge and straw carbon prepared in step 1 with water glass, kaolin, and white cement in proportion, add water and stir, and prepare pellets with a particle size of 8-17mm with a granulator, and the weight percentage is : sludge 10%-20%; red mud 20%-30%; straw carbon 5%-10%; water glass 3%-8%; kaolin 1%-5%; white cement 6%-15%; balance for water.
[0027] 3) Heat the pellets prepared in step 2 at 80-250°C for 1-4 hours, keep warm for 1-2 hours, cool to room temperature naturally, water and maintain for 3-12 hours, and dry naturally to obtain t...
Embodiment 1
[0033] 1) The remaining sludge from the municipal domestic sewage plant and the red mud from the alumina industrial waste were dehydrated, dried, and pulverized with a pulverizer until the particle size was 100 mesh. The straw is crushed and carbonized with a carbonization furnace.
[0034] 2) Mix the red mud, sludge and straw carbon prepared in step 1 with water glass, kaolin, and white cement in proportion, then add water and stir, and use a granulator to prepare pellets with a particle size of 15mm, which are used to prepare artificial wetland composites The weight percent of the filler is: 20% of sludge; 30% of red mud; 10% of straw carbon; 5% of water glass; 5% of kaolin; 15% of white cement; 15% of water.
[0035] 3) Heat the pellets prepared in step 2 at 100°C for 2 hours, keep warm for 1 hour, cool down to room temperature naturally, water and maintain for 3 hours, and dry naturally to get this product.
Embodiment 2
[0037] 1) The remaining sludge from the municipal domestic sewage plant and the red mud from the alumina industrial waste were dehydrated, dried, and pulverized with a pulverizer until the particle size was 200 mesh. The straw is crushed and carbonized with a carbonization furnace.
[0038] 2) Mix the red mud, sludge and straw carbon prepared in step 1 with water glass, kaolin, and white cement in proportion, then add water and stir, and use a granulator to prepare pellets with a particle size of 8mm, which are used to prepare artificial wetland composites The percentage by weight of the filler is: 20% of sludge; 30% of red mud; 10% of straw carbon; 8% of water glass; 5% of kaolin; 15% of white cement; 12% of water.
[0039] 3) Heat the pellets prepared in step 2 at 200°C for 1 hour, keep warm for 2 hours, cool down to room temperature naturally, water and maintain for 4 hours, and dry naturally to obtain this product.
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