High-cadmium-adsorption filamentous fungus Paecilomyces lilacinus XLA, and preparation method and application thereof
A technology of Paecilomyces lilacinus and Paecilomyces lilacinus, which is applied to the preparation of the filamentous fungus Paecilomyces lilacinus XLA, and the field of the filamentous fungus Paecilomyces lilacinus XLA with high adsorption of cadmium, which can solve secondary pollution And deal with the problems of high cost and cumbersome technology, and achieve the effect of good adsorbent regeneration ability, simple treatment process and low cost
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Embodiment 1
[0045] Embodiment 1: A preparation method of the filamentous fungus Paecilomyces lilacinus XLA, the steps of which are: separation, purification and re-screening.
[0046] 1) Isolation of cadmium-resistant strain XLA
[0047] A. Weigh 10g of the potted soil sample used for heavy metal restoration with a heavy metal cadmium content of 50mg / Kg, put it in 90ml of sterile water with 5 0.5mm glass beads, shake it at 200r / min on a constant temperature shaker at 28°C for 30min, statically After standing for 1 min, the supernatant was taken for 10-fold serial dilution;
[0048] B. Spread 100 μL of dilutions of different dilutions on a Martin plate containing 60 mM cadmium, rest for a while, and place it upside down in a constant temperature incubator at 28°C for 5 days;
[0049] C, the microbes grown on the plate are streaked, separated and purified, and then re-applied to the above-mentioned cadmium-containing Martin plate for cultivation;
[0050] D. After 10 times of separation a...
Embodiment 2
[0058] The application of a filamentous fungus Paecilomyces lilacinus XLA in the treatment of heavy metal cadmium pollution is as follows:
[0059] 1) Tolerance detection of filamentous fungus XLA to various heavy metals
[0060] Liquid culture conditions: before inoculation, add a certain amount of filter-sterilized heavy metal mother liquor to the required concentration in the mineral salt (MM) liquid medium, then inoculate the spore suspension of Paecilomyces lilacinus XLA according to 1% inoculum, cultivate for 7 days, and observe its growth status.
[0061] Solid culture conditions: Inoculate spores into mineral salt (MM) liquid medium and culture on a shaking table until mycelial balls just form. The mineral salt (MM) solid plate containing a certain concentration of heavy metals was divided into three equal areas, and mycelium balls with the same diameter were inoculated in each area by spot method, and cultured at 28°C for 7 days. The diameter of mycelial balls was r...
Embodiment 3
[0077] Example 3: The application of a filamentous fungus Paecilomyces lilacinus XLA in the treatment of electroplating wastewater containing heavy metals, its application process:
[0078] Collect live XLA bacteria and prepare dead bacteria as described in Example 2, both of which are used to remove cadmium ions in electroplating wastewater.
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