A kind of hard water softening method and high calcium sugar beet meal and preparation method thereof
A technology of hard water softening and sugar beet pulp, applied in water softening, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problems of high cost, narrow application range, application limitation, etc. Effect
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Embodiment 1
[0026] Such as figure 1 Shown, a kind of hard water softening method using sugar beet meal as raw material, concrete steps are as follows:
[0027] (1) Pretreatment of sugar beet pulp: the dry sugar beet pulp is sorted, crushed or minced, passed through a 60-mesh sieve, soaked in distilled water for 5 minutes, then quickly washed with tap water, finally rinsed with distilled water, and drained for later use;
[0028] (2) Soften hard water with pretreated beet pulp: Weigh 40 g of pretreated sugar beet pulp in a round bottom flask, add 200 mL of tap water with a hardness of 927 mg / L (calculated as CaO), adjust the pH to 6.0, and mix the system at Water bath at 80°C for 1h;
[0029] (3) Slag water separation: the mixed system is filtered and centrifuged to obtain high-calcium sugar beet pulp and demineralized water. Use a 100mL pipette to pipette 100mL of clear liquid into a 250mL conical flask, add 5mL of ammonia salt buffer solution and a little chrome black T indicator, and ...
Embodiment 2
[0030] The difference between this embodiment and embodiment 1 is:
[0031] Change the experimental beet meal in step (1) to beet granular meal, use a 400 mesh sieve to sieve the beet meal, adjust the soaking time of the beet meal to 20min, and adjust the amount of wet beet meal after pretreatment in step (2) to 80g , the hard water is tap water, its initial hardness is adjusted to 927mg / L (calculated as CaO), the pH of the mixed system is adjusted to 8.0, and it is placed in a water bath at 40°C for 2h.
[0032] In step (3), by calculation, the water hardness after sugar beet meal treatment is 379.62mg / L (in terms of CaO), reaching the hardness requirement of domestic water GB5749-2006 (total hardness in terms of CaO≤450mg / L), sugar beet The ash content of the wet meal was 3.26% by weight on a dry basis. Calculating by moisture content of 90% (moisture content of wet beet pulp is 85%), the consumption of absolute dry sugar beet pulp is 8 grams.
Embodiment 3
[0034] The difference between this embodiment and embodiment 1 is:
[0035] Change the experimental beet meal in step (1) to dry beet meal, use a 200-mesh sieve to sieve the beet meal, adjust the soaking time of the beet meal to 10min, and adjust the amount of wet beet meal after pretreatment in step (2) to 60g , the hard water was adjusted to well water, the initial hardness was adjusted to 1027mg / L (calculated as CaO), the pH of the mixed system was adjusted to 8.0, and the water bath was placed at 40°C for 2h.
[0036] In step (3), by calculation, the water hardness after sugar beet meal treatment is 432.9mg / L (in terms of CaO, reaching the hardness requirement of GB5749-2006 for domestic water (total hardness in terms of CaO≤450mg / L), beet wet The ash content of the meal is 4.3% (percentage by weight, on a dry basis). Calculated at 90% water content (beet meal contains 90% water), the consumption of dry beet meal is 6 grams.
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