Wetland composite filler applied to treatment of rural domestic sewage, and preparation method thereof

Abstract

The invention discloses a wetland composite filler applied to treatment of rural domestic sewage, and a preparation method thereof. The raw materials comprise fly ash, quicklime, cement, yellow sand and scrap iron, and the finished product wetland composite filler is prepared by crushing, pulping, injection molding and blank forming, gas forming and initial setting, cutting and curing. According to the invention, the fly ash, quicklime, cement, yellow sand and scrap iron are used as raw materials to prepare the wetland composite filler according to specified weight components and corresponding preparation processes. The prepared wetland composite filler contains a large number of uniform and fine air holes, the specific surface area of the wetland composite filler is greatly increased, the wetland composite filler can make full contact with sewage, microorganism growth is facilitated, pollutants can be fully adsorbed, filtered and intercepted, and the treatment effect is better; and the wetland composite filler prepared by the invention is uniform in overall specification, all the wetland composite fillers can achieve a treatment effect, and the utilization rate of the wetland composite filler is higher.

Description

technical field [0001] The invention relates to a domestic sewage treatment wetland, in particular to a wetland composite filler used for treating rural domestic sewage and a preparation method thereof. Background technique [0002] With the development of the rural economy, the living standards in rural areas are constantly improving, and the process of urbanization is also advancing, so the requirements for the living environment are getting higher and higher. At the same time, the discharge of domestic sewage in rural areas is also increasing. Due to the shortage of management funds and the weak awareness of rural water environment protection, domestic sewage in rural areas is discharged directly without treatment. Untreated or improperly treated domestic sewage has become one of the main reasons for the deterioration of river and lake water quality. In recent years, as the country pays more and more attention to the governance of rural water environment, the technology ...

AI Technical Summary

Problems solved by technology

[0005] 1) This type of filler has a single function and is inert itself, basically does not have physical and chemical reactions with the pollutants in the sewage. This type of filler is applied to the wetland to treat phosphorus, and it is completely dependent on the vegetation on the wetland to absorb phosphorus to achieve removal. Phosphorus purpose, that is, traditional fillers only play a filtering role; 2) After the wetland has been in operation for a period of time, because the gaps between the fillers are getting smaller and smaller, it is easy to block and cause water accumulation or overflow, and the treatment effect of the wetland is significantly reduced ; 3) Due to the composition of fillers with different particle sizes used in this type of filler, the part with the smallest particle size that plays a major role has a low utilization rate for the wetland as a whole

[0006] Therefore, the existing artificial wetland fillers have the problems of single function, poor treatment effect and low utilization rate of fillers.

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