A method and device for titanium dioxide photocatalytic restoration of lake sediment

Abstract

The invention relates to a method and a device for repairing lake bottom sludge by titanium dioxide photocatalysis. The device comprises a reactor body and a sludge pump, wherein a material inlet is positioned under one side of the reactor body; a water outlet and a material outlet are respectively positioned above and under the other side of the reactor body; a photocatalysis part is arranged in the reactor body; the photocatalysis part and the reactor body are detachably arranged in a matching way. The method comprises the following steps of in the use process, pumping the sludge into the reactor body by the sludge pump, adding a titanium dioxide photocatalysis material into an opening of a top plate, energizing the device, rotating the top plate, scattering the titanium dioxide photocatalysis material contained in a box body out of the lower outlet of the box body, and stirring the sludge by a protection steel cylinder, so as to effectively degrade and react the sludge. The method and the device have the advantages that the sludge treatment efficiency by photocatalysis is improved, the land occupation area of the sludge treatment device is saved, the energy consumption is effectively decreased, and the sludge treatment cost is reduced.

Description

technical field [0001] The invention relates to a sludge treatment method and device, in particular to a method and device for repairing lake bottom mud by removing toxic substances, microorganisms and heavy metals in lake bottom mud by using a photocatalytic method. Background technique [0002] "Sludge" tends to refer to contaminated wet materials such as sediments, and contaminated land, as well as toxic wet or wettable substances from mining, agriculture (e.g. pasture waste and biomass production and waste) and other sources that require remediation. Other polluting by-products of the activity of the substance. Sludge often contains a variety of different pollutants including, for example, compounds (such as dioxins, PCBs, pesticides, and phenols, many of which are volatile), heavy metals (such as arsenic, copper, lead, and mercury), ), and microorganisms (hepatitis, E. coli, cholera). A portion of the world's lakes, rivers, and bays are heavily polluted with toxic pol...

AI Technical Summary

Problems solved by technology

However, although incineration and thermal energy utilization technologies can use energy, domestic sludge has a lower organic matter content than that of foreign developed countries, so the utilization rate of energy itself is not as good as that of foreign countries, and the equipment and operation costs are expensive, which still causes organic matter such as dioxin. Air pollution Inorganic substances (hazardous goods) and about 1 / 3 of the residual solid amount need further disposal

The bottom sludge of lakes and rivers is also a kind of sludge, but there are still differences from the remaining sludge with a water content of 98-99% in sewage treatment plants: (1) The bottom sludge of rivers and lakes is directly collected from the bottom of rivers and lakes by sludge pumps. For lake bottom absorption, due to long-term precipitation, the water content of the sludge absorbed by the sludge pump is relatively low, usually about 93.5-96.5%; (2) The organic matter content of river and lake sludge is low after long-term precipitation and natural fermentation , the content of organic matter is 8% to 19% of dry sludge; (3) The amount of sludge treatment in rivers and lakes is large, and the requirements for equipment mobility are high

Therefore, the current known process methods cannot meet the requirements of efficient and rapid treatment of river and lake sediments.

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