A method for enriching non-toxic green algae in surface flow wetlands for water quality regulation

Abstract

The invention relates to a method for enriching nontoxic green algae on surface current wetland to control water quality, comprising the following steps: (1), constructing a surface current wetland including a treatment pool, the treatment pool internally includes a soil layer and a shallow water layer sequentially from bottom to top, planting allelopathic emerging plants in the soil layer, inoculating nontoxic green algae in the shallow water layer, and arranging an inflow pipe and an outflow pipe at front and rear ends of the shallow water layer; (2), secondary effluent from an urban wastewater plant flowing by the surface current wetland to enrich the nontoxic green algae during wastewater purification. Compared with the prior art, the method combines water purification of the surface current wetland and enriching efficacy of the nontoxic green algae, the growth of toxic microalgae in water may be also be inhibited through enhancing the growth of the nontoxic green algae, and the enriched nontoxic green algae may serve as an aquatic feed to provide ecological resourceful utilization of wetland effluents.

Description

technical field [0001] The invention relates to a surface-flow wetland for enriching non-toxic green algae, in particular to a method for enriching non-toxic green algae in a surface-flow wetland for water quality control, and belongs to the technical field of environmental engineering. Background technique [0002] In the current secondary treatment process of urban sewage plants, the treatment effect of nitrogen and phosphorus is often unsatisfactory due to insufficient organic carbon sources in the influent, so there are problems such as high residual nitrogen and phosphorus in the effluent and unreasonable ratio of nitrogen and phosphorus. If it is discharged directly, it is easy to cause eutrophication of the water body, and then cause the malignant proliferation of toxic microalgae and cause algal blooms; in addition, the organic carbon source of the secondary effluent is insufficient, and it is impossible to continue to remove nutrients such as nitrogen and phosphorus ...

AI Technical Summary

Problems solved by technology

[0002] In the current secondary treatment process of urban sewage plants, the treatment effect of nitrogen and phosphorus is often unsatisfactory due to insufficient organic carbon sources in the influent, so there are problems such as high nitrogen and phosphorus residues in the effluent and unreasonable nitrogen and phosphorus ratios.

If it is discharged directly, it is easy to cause eutrophication of the water body, and then cause the malignant proliferation of toxic microalgae and cause algal blooms; in addition, the organic carbon source of the secondary effluent is insufficient, and it is impossible to continue to remove nutrients such as nitrogen and phosphorus through the activated sludge process. And other advanced processing technology, the cost is higher

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