Method for lowering heavy metal content and water content in sludge
A heavy metal and water content technology, applied in water/sludge/sewage treatment, sludge treatment, sludge detoxification, etc., can solve the problems of high energy consumption and material consumption, complicated operation, etc., and achieve low energy consumption and material consumption, easy to gather Sinking, the effect of improving the dehydration performance
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Embodiment 1
[0025] Embodiment 1: the method for reducing heavy metal content and sludge water content in this sludge, concrete operations are as follows:
[0026] (1) Take 0.1g cetyltrimethylammonium chloride powder (relative molecular mass: 320), dissolve it in 62mL deionized water, stir at room temperature until completely dissolved, and put it in a brown reagent bottle for later use, ten of which The concentration of hexaalkyltrimethylammonium chloride solution is 5mmol / L;
[0027] (2) Add 200mL of cetyltrimethylammonium chloride solution with a concentration of 5mmol / L to 10g of phosphogypsum, vibrate and impregnate at 20°C for 3h, and filter the impregnated liquid-solid suspension, and the solid substance After drying and cooling, it is ground into powder, which is modified phosphogypsum, and stored in a desiccator for later use;
[0028] (3) Take an acetic acid solution with a mass concentration of 50%, add it to the sludge concentrated by gravity, and stir immediately at room temp...
Embodiment 2
[0035] Embodiment 2: the method for reducing heavy metal content and sludge moisture content in the sludge, the specific operations are as follows:
[0036] (1) Take 0.1g of cetyltrimethylammonium chloride powder, dissolve it in 31mL of deionized water, stir at room temperature until completely dissolved, and put it in a brown reagent bottle for later use, in which cetyltrimethylchloride The concentration of ammonium chloride solution is 10mmol / L;
[0037] (2) Add 500mL cetyltrimethylammonium chloride solution with a concentration of 10mmol / L to 10g of phosphogypsum, shake and impregnate at 25°C for 5h; after the impregnated liquid-solid suspension is filtered, the solid matter is dried After cooling, grind it into powder, which is modified phosphogypsum, and store it in a desiccator for later use;
[0038] (3) Take an acetic acid solution with a mass concentration of 100%, add it to the sludge concentrated by gravity, and stir immediately at room temperature at a stirring sp...
Embodiment 3
[0045] Embodiment 3: the method for reducing heavy metal content and sludge water content in this sludge, concrete operation is as follows:
[0046] (1) Take the ester quaternary ammonium salt, dissolve it in deionized water, stir at room temperature until it is completely dissolved, and put it in a brown reagent bottle for later use. The concentration of the ester quaternary ammonium salt solution is 1 mmol / L;
[0047] (2) Add a solution of ester quaternary ammonium salt with a concentration of 1 mmol / L to phosphogypsum, shake and impregnate at 25°C for 4 hours; after the impregnated liquid-solid suspension is filtered, the solid substance is dried and cooled, and ground into powder , which is modified phosphogypsum, stored in a desiccator for subsequent use, wherein the mass volume ratio of phosphogypsum and ester quaternary ammonium salt solution is 1g:6mL;
[0048] (3) Take an acetic acid solution with a mass concentration of 70%, add it to the sludge concentrated by gravi...
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