Black and odorous water body bottom mud resource utilization treatment method

Abstract

The invention discloses a black and odorous water body bottom mud resource utilization treatment method which comprises the following specific steps: S1, collecting black and odorous water body bottom mud, and carrying out solid-liquid separation to obtain black and odorous bottom mud; S2, collecting waste, and forming waste particles through treatment; S3, putting the black and odorous bottom mud and the waste particles into a carbonization furnace to obtain a bottom mud mixture; S4, performing high-temperature thermal cracking on the carbonized bottom mud mixture to obtain black and odorous bottom mud biomass charcoal; S5, soaking the black and odorous bottom mud biomass charcoal in an ammonium sulfate saturated solution to obtain activated black and odorous bottom mud biomass charcoal; and S6, mixing the activated black and odorous bottom mud biomass charcoal, monopotassium phosphate, sodium alginate and pyroligneous liquor together to prepare the bottom mud base fertilizer. The bottom mud biomass charcoal-based fertilizer prepared by the invention has better adsorption capacity and slow release property, can improve the water and fertilizer retention capacity of soil, and can effectively increase the nutrient content of the bottom mud biomass charcoal-based fertilizer finished product.

Description

technical field [0001] The invention belongs to the technical field of water environment treatment, and in particular relates to a treatment method for resource utilization of black and odorous water bottom sludge. Background technique [0002] With the continuous development of the economy, the problem of water pollution has become more and more serious, and the treatment of urban black and odorous sewage is urgent. The sediment of black and odorous sewage is an important part of the ecosystem. There are a large amount of nitrogen, phosphorus, oxygen-consuming substances, and heavy metals in the sediment. And refractory organic pollutants, etc., the secondary pollution caused by the release of pollutants in the sediment is the main reason why the water body is difficult to treat. [0003] The treatment methods of sediment mainly include physical method represented by sediment dredging, chemical method (such as adding nitrate, hydrogen peroxide, calcium peroxide, aluminum sa...

AI Technical Summary

Problems solved by technology

[0005] Patent CN111453727 discloses a preparation method of sludge-straw composite biomass activated carbon, including mixing 65-90% of sludge, 5-25% of agricultural waste and 1-15% of wood tar in mass ratio, granulating and drying Composite particles are obtained, carbonized and activated under oxygen-free or oxygen-limited conditions, and activated carbon and pyrolysis gas are obtained. After the pyrolysis gas is dedusted and purified, wood tar, wood vinegar and non-condensable gas are obtained. Among them, the wood vinegar part Spray back into the carbonization furnace as an activator, and the wood tar is recycled as a granulation raw material. In this method, the amount of agricultural waste added is small, and the adsorption value of active iodine is low.

In addition, there are currently few studies on the preparation and resource utilization of black and odorous water sediment biochar. In view of this, it is necessary to study a disposal method for the resource utilization of black and odorous water sediment

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