Artificial soil layer quick infiltration system and method for removing ethinylestradiol in water with high hydraulic load

Abstract

The invention relates to an artificial soil layer quick infiltration system and method for removing ethinylestradiol in water with high hydraulic load, and the main structure of the system adopts an organic glass column as a carrier. Overall height of the column is 55cm, including overflow space with a height of 10 cm and dense filling of artificial mixed soil and gravel filter materials with a height of 45 cm. Fillers, from top to bottom, include a mixture of silty clay, medium-fine sand and volcanic rocks with a thickness of 15 cm, zeolite with a thickness of 25 cm, and coarse sandy gravel with a thickness of 5 cm. Endocrine disruptor ethinylestradiol can be removed from the to-be-treated water successively through the column, and through the degradation of soil natural microorganisms and the physical adsorption of the filter materials. Through the system, the removal rate of ethinylestradiol in reclaimed water is 99% or above, and the average removal rate is about 90% for high-concentration distribution water containing 10 <mu>g / L of EE2. The average of operation apparent permeability of the system is 1.26cm / s, the system is high in hydraulic load and low in site condition requirements. Plugging is an important factor affecting the application of artificial soil layer rapid infiltration system engineering. The system can operate for a long time under high hydraulic load, and can effectively remove the target pollutant EE2.

Description

technical field [0001] The invention belongs to the technical field of water treatment, in particular to an artificial soil layer rapid infiltration system and method for removing ethinylestradiol in water with high hydraulic load. . Background technique [0002] The endocrine disruptor ethinyl estradiol (EE2) is the steroid hormone with the strongest estrogenic activity in the body, mainly derived from the daily excreta of animals and humans, and can disrupt the endocrine function of organisms at extremely low concentrations. The existing sewage treatment process can effectively remove most inorganic pollutants and some organic pollutants in urban sewage, but the removal effect on trace toxic and harmful pollutants is not good. In recent years, EE2 has been detected in the effluent of sewage treatment plants and rivers. For example, the highest concentration in the effluent of a sewage treatment plant in a southern city reached 498.9ng / l, and the concentration of EE2 in th...

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Problems solved by technology

[0004] In order to overcome the shortcoming that the above-mentioned existing system devices are easy to block, the object of the present invention is an artificial soil rapid infiltration system and method for removing ethinylestradiol in water with high water conservancy load. The infiltration system is aimed at the target pollutants and operates under high water conservancy load. The system seepage rate remains good, and the purpose of water purification is achieved by means of the physical, chemical and biological interactions between the filter material-based medium and the pollutants.

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