Pre-treatment method of water supply plant iron-aluminum mud

Abstract

The invention belongs to the field of remediation of water environment, and specifically relates to a pre-treatment method of water supply plant iron-aluminum mud. The pre-treatment method comprises the following steps: injecting water into a water supply plant iron-aluminum mud culture device, enabling the final liquid level to be slightly higher than the water supply plant iron-aluminum mud, constructing a closed system, carrying out intermittent aeration culture on the closed system for at least four months, and then uniformly mixing, wherein the water supply plant iron-aluminum mud culturedevice comprises a container, a gravel layer, the water supply plant iron-aluminum mud and an aeration head, the gravel layer is arranged at the bottom part of the container, the water supply plant iron-aluminum mud is arranged above the gravel layer in the container, and the aeration head is arranged in the gravel layer and is communicated with the outer part of the container through an air pipe. According to the pre-treatment method disclosed by the invention, the water supply plant iron-aluminum mud can be deeply purified, most of active nitrogen and organic matters of the water supply plant iron-aluminum mud can be removed, a potential risk caused by recycling of the water supply plant iron-aluminum mud during a natural surface water environment remediation process can be further reduced, the adsorption capacity of the water supply plant iron-aluminum mud is tend to be improved, and enrichment of functional bacteria related to carbon-nitrogen cycling can be promoted; the process is simple, the cost is low, the operation is convenient, and resource utilization of waste is promoted.

Description

technical field [0001] The invention belongs to the field of water environment restoration, in particular to a pretreatment method for iron-aluminum mud of a water supply plant used for natural surface water environment restoration. Background technique [0002] Iron-aluminum sludge in water supply plants is an inevitable by-product of drinking water production, and its main components come from impurities in water sources and chemicals in the water treatment process. In the traditional flocculation and filtration process, iron-aluminum flocculants are used to remove impurities in water, which also promotes the richness of "iron-aluminum" in iron-aluminum sludge, which can reach 20% of the total sludge. Due to the high standard requirements of the water quality of the water supply plant, the iron-aluminum slime is mainly composed of inorganic components and is considered a harmless waste. At present, there are two main disposal methods for iron-aluminum sludge in water supp...

AI Technical Summary

Problems solved by technology

When reused for high-concentration wastewater treatment, the risk caused by the release of various pollutants contained in iron-aluminum sludge is not obvious due to the high background value of the treated wastewater pollutants and the low wastewater treatment standard; however, in When reused in low-pollution water bodies, especially natural surface water environment restoration, the potential pollution risk caused by the release of these pollutants in iron-aluminum mud is large

This situation undoubtedly limits the resourceful application of iron-aluminum mud in the control of natural surface water pollution with relatively high repair requirements.

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