Immobilized carrier of nano-attapulgite clay compounded hydrophilic urethane foam microorganisms
A nano-attapulgite and microbial immobilization technology, which is applied in the direction of immobilized enzymes, biochemical equipment and methods, sustainable biological treatment, etc., can solve the problems of high cost and limited application of nanomaterials, and achieve perfect pore structure and increase The effect of mechanical properties and simple manufacturing process
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Embodiment 1
[0024] Embodiment 1 A nano-attapulgite composite hydrophilic polyurethane foam microorganism immobilization carrier is composed of the following raw materials in parts by weight:
[0025] Polyether 100 Toluene Diisocyanate 50 Polyisocyanate 3.1
[0026] Nano attapulgite 4 silicone oil 0.45 tertiary amine 0.25
[0027] Organotin 0.14 Water 2.0 Dichloromethane (MC) 4.5
[0028] N, N Dimethylformamide (DMF) 40
[0029] Its preparation method comprises the following steps:
[0030] (1) The purified attapulgite raw soil produced by Jiangsu Xuyi Guangming Attapulgite Factory is crushed into particles with a particle size of less than 100 μm by an ordinary ball mill. Take 4 parts of pulverized attapulgite powder, mix it with 2.0 parts of water, and stir it into a stable attapulgite suspension in a BILON-1500 ultrasonic disperser produced by Xi'an Depai Biotechnology Co., Ltd. liquid. Take 1 part of commercially available (such as Nanjing Lipai Chemical Co., Ltd. or Gaizhou Chemi...
Embodiment 2
[0034] Embodiment 2 A nano-attapulgite composite hydrophilic polyurethane foam microorganism immobilization carrier is composed of the following raw materials in parts by weight:
[0035] Polyether 100 Toluene Diisocyanate 45 Polyisocyanate 3.9
[0036] Nano attapulgite 5 Silicone oil 1.2 Tertiary amine 0.20
[0037] Organotin 0.20 Water 2.5 MC2.3 DMF60
[0038] Its preparation method and test method are with embodiment 1.
[0039] After testing, the average COD of influent water is 648mg / l, NH 3-Domestic sewage with an average N of 68mg / l, an average of SS of 225mg / l, and a pH of 7-8. After 5 hours of biochemical treatment, the effluent index COD3 -N<5mg / l, SS<10mg / l, which meet the requirements of Class I A standard in GB18918-2002 "Pollutant Discharge Standards for Urban Sewage Treatment Plants".
Embodiment 3
[0040] Embodiment 3 A nano-attapulgite composite hydrophilic polyurethane foam microorganism immobilization carrier is composed of the following raw materials in parts by weight:
[0041] Polyether 100 Toluene Diisocyanate 38 Polyisocyanate 3.1
[0042] Nano attapulgite 2 silicone oil 0.85 tertiary amine 0.14 organotin 0.15
[0043] Water 1.0 MC1.6 DMF30
[0044] Its preparation method is with embodiment 1.
[0045] In a sequencing batch activated sludge reactor (sequencing batch reactor referred to as SBR reactor, produced by Lanzhou Jiaotong University) with a total volume of 5L, add 40% of the reaction volume foam carrier, and add the pre-acclimated active sludge at a concentration of 8g / L. Sludge is passed into domestic sewage to soak the carrier in the reactor, and the process of microbial immobilization and film formation is carried out under the condition of stuffy exposure. From the second day onwards, 30% of the waste water in the tank was replaced every day. After...
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