A vertical underflow constructed wetland device and method for sludge treatment

Abstract

The invention discloses a vertical submerged artificial wetland device for sludge treatment, which comprises an air heater, a whole body pipe, a treatment pool, a collection pipe and wetland plants, the air heater is connected with the treatment pool through the whole body pipe, and the treatment pool There is a sludge pipe above, and a filter layer is set in the treatment tank. The filter layer includes plant carbon source fill, coarse sand fill, fine sand fill, zeolite fill, ceramsite biological filter fill and gravel fill. Plant carbon source fill, coarse sand fill, fine sand fill, zeolite fill, ceramsite biological filter fill and crushed stone fill are laid sequentially from top to bottom, and the collection pipe is set at the bottom of the treatment tank. The outfall of the water tank extends out of the treatment tank, and wetland plants are planted on the sludge to be treated in the treatment tank. After being heated by the air heater, the cold air is transported to the treatment tank through the whole body pipe, which accelerates the drying treatment of the sludge, and at the same time reduces the deadness of wetland plants in winter, and the sewage in the sludge is reused after treatment.

Description

technical field [0001] The invention relates to sewage treatment technology in environmental protection, in particular to a vertical underflow artificial wetland device and method for sludge treatment. Background technique [0002] With the rapid improvement of my country's sewage treatment capacity, the amount of sludge produced by sewage treatment plants has also increased significantly. However, about 80% of these sludges have not been properly treated, and the resulting pollution and re-pollution problems have aroused continuous attention from the society. The sludge treatment and disposal market is bound to enter a stage of rapid development. In accordance with the sludge disposal requirements of "green, environmental protection, recycling, and low carbon", it is particularly important to develop and select appropriate technologies according to local conditions. The traditional sludge composting technology has high cost and concerns about agricultural safety, the diges...

AI Technical Summary

Problems solved by technology

The existing wetland sludge treatment process generally faces the following problems: 1. The temperature in winter is low, and the degree of sludge drying is slow; 2. Plants are easy to wither and cause the overall system to be easily damaged, and the treatment efficiency of traditional sewage treatment devices is low; 3. Environmental pollution caused by direct landfill of sludge from traditional sewage treatment process

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