Composite modified polyurethane biological carrier and preparation method thereof
A composite polyurethane and biological carrier technology, applied in chemical instruments and methods, sustainable biological treatment, biological water/sewage treatment, etc., can solve the problems of enhanced pollutant degradation effect, high surface roughness, etc., to improve charge conduction efficiency , High effective specific surface, strengthen the effect of adsorption and proliferation
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Embodiment 1
[0047] A composite modified biological carrier is prepared by the following method steps: S1, preparing modified biochar, S2, loading modified biochar on a polyurethane sponge, and S3, preparing a composite modified biological carrier.
[0048] S1. Preparation of modified biomass charcoal: use fruit wood biochar (LUCK / Ark litchi fruit charcoal FT4DM) with a specific surface area of 103m 2 / g, the average pore size is 0.67nm, the surface zeta potential is ≥-42mV, and the biochar is pulverized and selected with a particle size of 100-200 mesh, and placed in a plasma equipment (RTL1200-PECVD-ALD—Nanjing Boyuntong Instrument Technology Co., Ltd. www.njbytyq .com) in the area with the strongest glow, the radio frequency power is 150W, the treatment is 20min, the atmosphere is pure oxygen, and the modification is completed and dried for use.
[0049] S2. Polyurethane sponge loaded modified biochar:
[0050] 1) Prepare 70 sponge blocks 1*1*1cm, Dongguan Hongmao Foam Products Co., ...
Embodiment 2
[0074] A series of tests were carried out to test the effect of the composite carriers in different proportions, mainly to test the removal effect of ammonia nitrogen and the effect of film hanging. The preparation method of the carrier is as follows:
[0075] 1) Preparation of modified biomass charcoal: fruit wood biochar is placed in a quartz boat, placed in the strongest glow area of the plasma equipment, radio frequency power 150W, treated for 20 minutes, pure oxygen is selected for the atmosphere, and the modification is completed. It is lychee charcoal with a specific surface area of 103m 2 / g, the average pore size is 0.67nm, the surface zeta potential is ≥-42mV, and the plasma equipment (RTL1200-PECVD-ALD) is customized by Nanjing Boyuntong Instrument Technology Co., Ltd. www.njbytyq.com.
[0076] 2) Prepare 70 sponge blocks and dry them at 60 degrees Celsius for 0.5h. The sponges are purchased from Dongguan Hongmao Foam Products Co., Ltd., and the density is 28kg...
Embodiment 3
[0090] To test the effect of novel biocarriers on the performance of hypoxic MBBR, a series of batch experiments were performed when MBBR reached steady state. From the experiment of Example 1, at 30 days, 6 pieces of composite modified polyurethane biocarriers were taken and put into 250mL serum bottles respectively, and the filling rate was kept at 30%, which contained the artificial wastewater prepared in Example 1. All serum bottles were cultured in a constant temperature shaker at a temperature of 25 °C and a rotation speed of 150 r / min. Suspended water samples were collected periodically with a needle and a syringe every 2 hours to determine the ammonia nitrogen concentration. The result is as Figure 8 shown.
[0091] Under anoxic conditions, the MBBR reactor loaded with the composite modified polyurethane biological carrier has a good ammonia nitrogen degradation effect.
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