Method for preparing sewage water additive by intermediate product of diatomite purification

A technology of sewage treatment agent and diatomite refined soil, applied in adsorption water/sewage treatment, flocculation/sedimentation water/sewage treatment, chemical instruments and methods, etc., can solve problems such as pollution and threat to the ecological environment, and reduce environmental pollution , High adsorption efficiency, and the effect of improving water quality

Inactive Publication Date: 2009-09-09
XUNDIAN XIANFENG KIESELGUR DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the reasons stated, pollution potentially threatens the fragile ecological environment around the mining area

Method used

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  • Method for preparing sewage water additive by intermediate product of diatomite purification
  • Method for preparing sewage water additive by intermediate product of diatomite purification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1: Take diatomite and waste acid liquid with a silicon dioxide content of 60% associated with sulfuric acid pickling and purification of high-burn vector diatom concentrate, and mix diatomite into the waste according to the solid-to-liquid volume ratio of 1:20. In the acid solution, stir to form a slurry, heat at 90°C for 4 hours, immerse and cool for 3 hours; dissolve hexadecyltrimethylammonium bromide in water to prepare a solution with a concentration of 1.35wt% by weight, and use Sodium hydroxide adjusts the pH of the solution to 9; pour the solution into diatomaceous earth and waste acid liquid cooling material, stir and impregnate for 10 hours, filter and obtain a diatomite filter cake, and then place the filter cake in a muffle at a temperature of 150°C After roasting in the furnace for 1 hour, it was pulverized, and the product was collected by sieving.

Embodiment 2

[0016] Example 2: Take the diatomite and waste acid liquid with a silicon dioxide content of 50% associated in the process of sulfuric acid pickling and purification of high-burn vector diatom concentrate, and mix diatomite into the waste according to the solid-to-liquid volume ratio of 1:30. In the acid solution, stir to form a slurry, heat at 100°C for 3 hours, immerse and cool for 4 hours; dissolve hexadecyltrimethylammonium bromide in water to prepare a solution with a concentration of 1.55wt% by weight, and use Sodium hydroxide adjusts the pH of the solution to 11; pour the solution into diatomaceous earth and waste acid liquid cooling material, stir and impregnate for 12 hours, filter and obtain a diatomite filter cake, and then place the filter cake in a muffle at a temperature of 200°C After roasting in the furnace for 2 hours, it was pulverized, and the product was collected by sieving.

Embodiment 3

[0017] Example 3: Take diatomite and waste acid liquid with a silicon dioxide content of 60% associated in the process of sulfuric acid pickling and purification of high-burn vector diatom concentrate, and diatomite is mixed into the waste according to the solid-to-liquid volume ratio of 1:40. In the acid solution, stir to form a slurry, heat at 100°C for 5 hours, immerse and cool for 5 hours; dissolve hexadecyltrimethylammonium bromide in water to prepare a solution with a concentration of 1.8wt% by weight, and use Sodium hydroxide adjusts the pH of the solution to 9; pour the solution into diatomaceous earth and waste acid liquid cooling material, stir and impregnate for 15 hours, filter and obtain a diatomite filter cake, and then place the filter cake in a muffle at a temperature of 250 °C After roasting in the furnace for 0.5 hour, it was pulverized, and the product was collected by sieving.

[0018] (2) The treatment agent of the present invention is used for the use met...

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Abstract

The invention discloses a method for preparing a sewage treatment agent from an intermediate product of purifying fine earth with diatomite, and relates to the preparation and application of a water treatment agent for treating urban sewage. In the present invention, in the process of purifying diatom concentrate by pickling, SiO is associated with low-grade diatomite and waste acid solution, and the diatomite is mixed into the waste acid solution according to the solid-liquid volume ratio of 1: 20-40, and the slurry is mixed for 90 Heating at ~100°C for 3-5 hours, immersing and cooling; dissolving cetyltrimethylammonium bromide in water to make a solution with a concentration of 1.35-2% by weight, and adjusting the pH to 8-11; adding the solution to the cooling object Roast after stirring and filtering, and collect the resultant. When in use, the diatomite sewage treatment agent is put into urban sewage at 0.1-0.3 g / L and stirred for 30 seconds, then left to stand, the supernatant liquid is siphoned, and the diatomite sludge in the lower layer is recovered. The invention utilizes waste raw materials, has low energy consumption, low cost, reduces environmental pollution, has short action time, significantly reduces water body COD and SS, easily removes settled sludge, and has no pollution to water bodies.

Description

Technical field [0001] The invention relates to the preparation and application of a water treatment agent for treating urban sewage. Background technique [0002] Urban domestic sewage is directly discharged without treatment, causing the amount of pollution in the water area to greatly exceed the level that the self-purification capacity of the water body can bear, and the water body is seriously polluted. Purified, modified, and activated diatomite has shown excellent performance in nitrogen and phosphorus removal from sewage. For example, S.A.WaSSay used lanthanum chloride solution to soak silica gel to study the adsorption of fluorine, phosphorus and arsenic (Adsorption offluoride, phosphate and arsenate iron on lanthanum impregnated silicagel. Wat. Env. Res. 1996, 68(3): 295-300); Chinese invention Patent Publication No. 1803274 Ning Ping, Kunming University of Science and Technology modified and loaded metal salts such as lanthanum nitrate and cerium nitrate on diato...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52C02F1/28B01J20/14
Inventor 夏非吴飞云李明聪李银潘梅仙习砚晶王俊凯
Owner XUNDIAN XIANFENG KIESELGUR DEV
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