A method of using microorganisms to treat waste water polluted by organic deicing agent calcium lactate
A microbial treatment, calcium lactate technology, applied in biological water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve agricultural ecological environment damage, street trees, lawn damage, polluted production and life, etc. Problems, low price, no secondary pollution, good mechanical properties
Inactive Publication Date: 2016-09-28
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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[0004] Every year in our country, a large amount of deicing agents are used in winter, which causes serious damage to the agricultural ecological environment in spring. Not only are street trees and lawns damaged, but the waste water used in deicing agents flows into underground pipe network waterways, and its pollution has a serious impact on our production and life.
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[0024] Prepare sodium alginate (SA) solution, add PVA, mix well, sterilize at 121 °C for 20 min, when the temperature drops to 25-30 °C, add Aspergillus niger liquid in the logarithmic phase of growth, use a 1 mL sterile syringe Squeeze the pellets into a beaker filled with 2% (mass percent) calcium chloride and let it harden for 1 hour, then wash the pellets with distilled water for 2 to 3 times, and then put the pellets in the prepared 3% boric acid Soak in the solution for 2 to 3 hours, wash with saline for 2 to 3 times after cross-linking, and store in the refrigerator for later use. The liquid-solid ratio (m:m, the same below) is 1:1, 2:1, 4:1, 6:1, 8:1, 10:1 immobilized pellets and calcium magnesium lactate sewage 50mL in 250mL In the Erlenmeyer flask, it was cultured in an air bath shaker at a speed of 150r·min-1 for 48h and then filtered. The CODcr value of the filtrate was measured by a COD analyzer. Each experiment was repeated three times, and the average value was ...
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A method for using microorganisms to treat wastewater polluted by organic deicing agent calcium lactate, involving a method for treating polluted wastewater, prepared by using sodium alginate (SA), polyvinyl alcohol (PVA), and crosslinking agent (calcium chloride + boric acid) as immobilized materials Immobilized small balls, immobilized microorganisms for low-temperature degradation and adsorption of deicing agent calcium lactate polluted wastewater; when the concentration of SA is 3%, the content of PVA is 7%, the concentration of cross-linking agent (calcium chloride + boric acid) is (2%+ 3%), the amount of embedded bacteria is 10%, when the concentration of calcium lactate is in the range of 100~300ppm, the liquid-solid ratio (m:m) is 50:1, the pH value is 7.0, the temperature is controlled at 5~15°, shake When the bed rotation rate is 200r / min and the sampling time is 6 days, the removal rate of deicing agent calcium lactate polluted wastewater can reach above 83%. The invention uses immobilized microorganisms to degrade the deicing agent, which is easy to separate solid and liquid after degradation, and the immobilized microorganisms can be reused, the method is simple, the environment is friendly, and the cost of raw materials is low.
Description
technical field [0001] The invention relates to a method for treating polluted water, in particular to a method for using microorganisms to treat waste water polluted by organic deicing agent calcium lactate. Background technique [0002] At present, the problems caused by the use of deicing agents have constituted major issues such as social problems, economic problems, and ecological security. The United States has issued a call to fight against this "salt damage". Usually, after the deicing agent enters the ground, it may pollute the local groundwater resources. Every spring, these applied deicing agents will affect the germination and early growth of seeds to varying degrees. Therefore, it is very important to use immobilized microorganisms to carry out low-temperature degradation technology research. [0003] Since the development of biotechnology, it has become the main means of treating urban sewage and organic wastewater treatment in countries all over the world. ...
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IPC IPC(8): C02F3/34
Inventor 臧淑艳卜新雅马原房志浩王婷婷李盟孙洪明
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY