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Waste brick application in waste water treatment

A waste water treatment and brick technology, which is applied in the fields of adsorption water/sewage treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc. problem, to achieve the effect of making full use of waste resources, high adsorption capacity and large porosity

Inactive Publication Date: 2003-06-18
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A common disadvantage of the known natural and simply modified adsorbents is that the adsorption capacity is low, while the high-performance water treatment adsorbents developed by artificial synthesis are high in adsorption capacity, but they are expensive and cannot be directly applied to high Concentration of mixed wastewater
This kind of filler is often used in the biofilm wastewater treatment process, but these fillers generally do not have the function of adsorbing pollutants in wastewater treatment. A few fillers with excellent adsorption properties, such as activated carbon, are very expensive (such as activated carbon 1000-3000 Yuan / ton); for zeolite with good adsorption performance on ammonia nitrogen in wastewater (but poor effect on phosphorus), the price is also 400-600 yuan / ton

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Bricks with a particle size of 0.3 to 5 cm are used to adsorb phosphorus in phosphorus-containing wastewater. The adsorption experiments were carried out under the conditions of temperature at 25°C, initial pH at 7, and initial phosphorus concentration at 100 mg / L. When the phosphorus concentration at adsorption equilibrium is 0.18mg / L, the measured equilibrium phosphorus adsorption capacity of the adsorbent reaches 1.78mg-P / g-adsorbent, which is 0.09mg-P / g-adsorbent for the control group slag under the same conditions. More than 19 times of P / g.

Embodiment 2

[0019] This adsorbent is used to adsorb phosphorus in wastewater, and the adsorption experiment is carried out under the conditions of a temperature of 25°C, an initial pH of 7, and an initial phosphorus concentration of 80mg / L. When the phosphorus concentration at adsorption equilibrium is 0.06mg / L, the measured equilibrium phosphorus adsorption capacity of the adsorbent reaches 1.19mg-P / g-adsorbent. It is more than 50 times and 3 times of the adsorption amount of 0.021mg-P / g and 0.39 of the control group zeolite and ceramsite under the same conditions.

Embodiment 3

[0021] The adsorbent with a particle size of 0.3-5 cm is used to adsorb phosphorus in waste water, and an adsorption experiment is carried out under the conditions of a temperature of 20° C., an initial pH of 7, and an initial phosphorus concentration of 75 mg / L. Samples were taken every 30 minutes to determine the phosphorus concentration. The adsorption reached equilibrium after 9 hours, and its saturated adsorption capacity was 0.91 mg-P / g-adsorbent.

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Abstract

An application of waste brick in treating sewage is dislcosed, which features that the leftover of brick is mechanically broken to become the granular adsorbent of harmful element (P, etc) in sewage. Its advantages are high adsorptive ability and low cost.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, and in particular relates to a waste water treatment adsorbent and a filler for inexpensively and efficiently removing phosphorus and other water body eutrophication pollutants in waste water. Background technique [0002] With the rapid development of industrial and agricultural production and residential urbanization, domestic wastewater, industrial wastewater and farmland surface runoff containing high concentrations of nutrients such as nitrogen and phosphorus flow into lakes, reservoirs and rivers, and accumulate in water bodies, stimulating a large number of algae in water bodies Breeding, leading to "bloom" in fresh water and "red tide" in sea water, which is commonly referred to as water eutrophication. One of the criteria for the classification of water body eutrophication by the United States Environmental Protection Agency (EPA) is that the total phosphorus concentration ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F3/10
CPCY02W10/10
Inventor 胡洪营刘超翔钱易
Owner TSINGHUA UNIV
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