Eco-engineering method for efficient removal of lipophilic trace organics in low-pollution water

Abstract

The invention discloses an ecological engineering method capable of efficiently removing lipophilic trace organic substances in low-pollution water. Along the water flowing direction, a high-density microalgae pool, an aquatic plant filtering bed and a subsurface constructed wetland are arranged in sequence. A suspension algae layer is arranged in the high-density microalgae pool, an aquatic plant layer is arranged in the aquatic plant filtering bed, and the subsurface constructed wetland is divided into a subsurface constructed wetland front area and a subsurface constructed wetland rear area. The subsurface constructed wetland front area and the subsurface constructed wetland rear area are both provided with a wetland plant layer, a soil layer, a volcanic rock layer, and a coal slag layer from top to bottom. Sewage to be process is processed by going through the high-density microalgae pool, the aquatic plant filtering bed, the subsurface constructed wetland front area, and the subsurface constructed wetland rear area in sequence. The provided method integrates the technological characteristics of high-density microalgae pool, aquatic plant filtering bed and subsurface constructed wetland and prominently improves the efficiency of an ecological engineering technology on removing lipophilic trace organic substances in low-pollution water.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering sewage treatment, and in particular relates to an ecological engineering method for efficiently removing lipophilic trace organic matter in low-pollution water. Background technique [0002] At present, many rivers in our country have low-pollution phenomena, which involve a wide range of low-pollution water bodies, and the mechanism of occurrence is very complicated. Some micro and trace amounts of lipophilic organic pollutants enter the water body to pollute water sources, and the concentration of these lipophilic organic pollutants is very small, which is reflected in COD, BOD 5 It is negligible in conventional indicators such as carbamide, but its toxicity is very high, it is a carcinogenic, teratogenic and mutagenic substance, and it is extremely harmful to the human body. Conventional physical and chemical methods for water environment have many follow-up problems and are ...

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Problems solved by technology

[0006] When the above three ecological engineering technologies are used alone, they can only have a good removal effect on COD, nitrogen, phosphorus, etc., so it is necessary to explore how to organically couple them, give full play to their respective strengths, and improve the removal of lipophilic trace organic matter Efficiency, there is no report in this area at home and abroad

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