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Preparation method of diatomite sludge high-efficiency adsorption dephosphorization filter material

A diatomite and sludge technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the requirement that it is difficult to meet the first-class standard of urban sewage discharge of 0.5mg/L , difficult to recycle sludge, high application costs, to achieve high adsorption and phosphorus removal efficiency, solve eutrophication, and improve performance.

Active Publication Date: 2020-04-10
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although chemical phosphorus removal has a good effect of adsorption and phosphorus removal, the chemical precipitation method requires high economic costs and high practical application costs, and it will also make the water body have the color of metal ions; in addition, the sludge produced by chemical precipitation is difficult Recycling causes secondary pollution
The biological phosphorus removal process is easily affected by process conditions such as water temperature and pH value, and when the phosphorus concentration in wastewater is greater than 10 mg / L, it is difficult to meet the requirement of 0.5 mg / L in the first-level standard of urban sewage discharge only by means of biological treatment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation method of diatomite sludge high-efficiency adsorption phosphorus removal filter material comprises the following steps:

[0026] Step 1: using diatomaceous earth to prepare the first diatomite sludge.

[0027] First add water to the diatomite to form a water sample; then add a flocculant to the water sample, mix and stir; finally filter and dry the coagulated sludge to prepare the first diatomite sludge.

[0028] The mixing and stirring of the water sample and the flocculant is realized by the coagulation mixer, and the stirring is carried out by using three speeds of fast, medium speed and slow speed in turn. The duration is 15-30 minutes. The flocculant is polyaluminum chloride or polyferric sulfate polymer flocculant.

[0029] In this example, the diatomite is Jilin Jinyuan diatomite, weigh 1.0g of diatomite in 1L of water to form a water sample with a certain turbidity, add 0.6g of polyaluminum chloride flocculant to the water sample, Under the co...

Embodiment 2

[0038] The preparation method of diatomite sludge high-efficiency adsorption phosphorus removal filter material comprises the following steps:

[0039] Step 1: Weigh 1.0g of diatomite in 1L of water to form a water sample with a certain turbidity, add 0.8g of polyaluminum chloride or polyferric sulfate flocculant to the water sample, and stir at 270rmp for 30s under the coagulation mixer , then stirred at 120rmp for 5min, and finally stirred at 30rmp for 10min, suction-filtered the coagulated sludge, and dried at 110°C.

[0040] Step 2: Add 1.0 mol / L sodium hydroxide solution to the first diatomite sludge obtained in step 1, and adjust the pH value of the mixed solution to 10, stir in a coagulation mixer at 150rmp for 1-2h, and obtain wet silica Algal earth sludge is dried at 100-120°C;

[0041] Step 3: Rinse the second diatomite sludge dried in step 2 with water until the washing liquid is colorless and the pH is neutral, and dry at 100-120°C for 3-5 hours to obtain dried di...

Embodiment 3

[0045] The preparation method of diatomite sludge high-efficiency adsorption phosphorus removal filter material comprises the following steps:

[0046] Step 1: Weigh 1.0g of diatomite in 1L of water to form a water sample with a certain turbidity, add 0.4g of polyaluminum chloride or polyferric sulfate flocculant to the water sample, and stir at 300rmp under the coagulation mixer 1min, then stirred at 150rmp for 10min, and finally stirred at 60rmp for 15min, suction filtered the coagulated sludge, and dried at 110°C.

[0047] Step 2: Add 1.0 mol / L sodium hydroxide solution to the first diatomite sludge obtained in step 1, and adjust the pH value of the mixed solution to 9, stir in a coagulation mixer at 150rmp for 1-2h, and obtain wet silica Algal earth sludge is dried at 100-120°C;

[0048] Step 3: Rinse the second diatomite sludge dried in step 2 with water until the washing solution is colorless and the pH is neutral, and dry at 100-120°C for 3-5 hours to obtain dried diat...

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Abstract

The intention relates to a preparation method of a diatomite sludge high-efficiency adsorption dephosphorization filter material. The method comprises the following steps: preparing first diatomite sludge from diatomite; mixing the first diatomite sludge with a sodium hydroxide solution to obtain second diatomite sludge; and washing the second diatomite sludge, drying, and crushing to obtain the filter material.

Description

technical field [0001] The invention relates to a preparation method of diatomite sludge high-efficiency adsorption phosphorus removal filter material. Background technique [0002] With the rapid development of my country's industry and agriculture in recent years, a large amount of phosphorus-containing industrial wastewater and agricultural wastewater has been produced. The unreasonable discharge of wastewater has caused a large part of our country's rivers, ponds, and lakes to become eutrophic. Eutrophication not only affects the water quality, but also causes harm to the organisms in it, and also affects human health. Therefore, the treatment of phosphorus-containing wastewater is imminent. [0003] At present, the commonly used phosphorus removal methods include chemical precipitation method, biological removal method, direct land use method, membrane separation method, and adsorption method. Among them, the most widely used methods are chemical precipitation, biologi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/14B01J20/30C02F1/28C02F101/10
CPCB01J20/14B01J20/041B01J20/06B01J20/0288B01J20/0281B01J20/0248B01J20/0229C02F1/281B01J2220/4806B01J2220/42C02F2101/105
Inventor 艾恒雨刁寒林家宝张世豪崔婉莹
Owner HARBIN UNIV OF SCI & TECH
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