A method for treating sewage by using garbage incinerator slag

Abstract

The invention relates to a method for treating sewage by virtue of waste incineration slag. The method specifically comprises the following steps: removing impurities from waste incineration slag, sieving, flushing with water, and carrying out airing, so as to obtain carrier fillings, and filling a reaction bed with the carrier fillings; adding activated sludge into the reaction bed by virtue of a pump; cultivating and acclimating activated sludge until detecting that the removal rates of COD and NH3-N in effluent of the reaction bed reach above 70%; and spraying sewage by virtue of a water distribution region, processing by virtue of the reaction bed, and collecting and discharging treated rural domestic wastewater. Compared with the prior art, the method has the advantages that the waste incineration slag is subjected to resource utilization based on a theory of ''waste control by waste'', meanwhile, the rural domestic wastewater is treated with low cost, and household refuse incineration slag is prepared into the microorganism-attached carrier fillings for the sewage treatment, so that the rural environment is beneficially improved and protected.

Description

technical field [0001] The invention belongs to the technical field of solid waste resource utilization and sewage treatment, and in particular relates to a method for treating sewage by utilizing waste incineration slag. Background technique [0002] Domestic waste incineration slag is a typical by-product of domestic waste after incineration, with low levels of heavy metals and molten salts, and is a non-toxic general waste in my country. Due to the significant reduction and harmless effect of incineration, domestic waste incineration projects in China are expanding rapidly. According to statistics, by the end of 2015, 224 municipal solid waste incineration treatment facilities had been built and operated in my country's cities, with an incineration treatment capacity of 207,800 tons per day, accounting for about 40% of the harmless treatment. With the rapid advancement of my country's urbanization process and rapid economic development, the output of rural domestic waste...

AI Technical Summary

Problems solved by technology

As the carrier of microorganisms, fillers affect the growth, reproduction and shedding of microorganisms, so they have a very important impact on the operation of the reactor. Traditional sewage treatment fillers are mainly natural inert minerals or polymer plastic fillers, etc., but they are very important for rural areas. Or the cost is high for economically underdeveloped areas, and it may also consume non-renewable resources

[0004] Chinese patent CN 102351565A discloses a method for preparing water treatment phosphorus polyfill by sintering domestic waste incinerator slag, specifically related to a method for preparing water treatment phosphorus polyfill by co-sintering municipal solid waste incinerator slag and clay. The application status of slag is only used as roadbed material or brick-making material. As a new way of resource utilization of waste incineration slag, the economic added value of resource utilization is improved. However, the preparation method of the filler in this patent consumes energy and requires high temperature sintering , there may be pollution (such as flue gas pollution, etc.) during the preparation process. The filler is mainly used for the adsorption of phosphorus in water. When the filler is saturated, it will become waste that needs to be treated and disposed of again.

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