A filter agent for sewage treatment produced from municipal sludge and its manufacturing method

Abstract

The invention relates to a filtering agent produced by municipal sludge for treating sewage and a preparation method thereof. The preparation method is characterized by adopting the municipal sludge, performing high temperature incineration, crushing, sorting, crushing, milling and sieving on the municipal sludge to prepare powder material, using the powder material, waste incineration residue, calcium hydroxide, chlorine dioxide, anhydrous aluminum oxide and polyacrylamide as raw materials, performing mixing and stirring by a biaxial paddle mixer, complexly cycling the raw materials in a machine body by mechanical action in a all-directional, widely staggered and dead end-free manner, so as to achieve the purpose of uniform diffusion mixing of the filtering agent; and then conveying the uniformly mixed filtering agent to a dedicated storage silo, performing packaging on the filtering agent by an all-automatic electronic weighing packaging machine system to prepare a filtering agent product. The product has passed inspection to meet the national industry standard. The advantages and effects that the product is prepared by comprehensive utilization of resources of solid waste, the waste is changed into treasure, harmness is changed into benefit, pollution is avoided, cost is low, the benefit is good, and the product accords with requirements of the state on energy-saving, emission reduction are achieved and ecological environment protection.

Description

technical field [0001] The invention relates to a filter agent for sewage treatment produced from urban sludge, specifically, it uses urban sludge, sludge powder after mechanical dehydration and high-temperature incineration, and garbage incineration ash powder as main raw materials The filter agent produced belongs to the field of waste treatment. [0002] The present invention also relates to a method for producing the filter agent. Background technique [0003] Municipal sludge is a mixed waste of sediments and floating residues on the surface of sewage generated during the treatment of domestic sewage and rainwater collected by municipal pipe networks and industrial wastewater in urban sewage treatment plants. The general water content is 93% to 99%. The composition and source of sludge are relatively complex, which contains a large amount of nitrogen, phosphorus and potassium nutrients and organic pollutants, heavy metal elements and toxic and harmful substances; with ...

AI Technical Summary

Problems solved by technology

[0003] Municipal sludge is a mixed waste of sediments and floating residues on the surface of sewage generated during the treatment of domestic sewage and rainwater collected by municipal pipe networks and industrial wastewater in urban sewage treatment plants. The general water content is 93% to 99%. The composition and source of sludge are relatively complex, which contains a large amount of nitrogen, phosphorus and potassium nutrients and organic pollutants, heavy metal elements and toxic and harmful substances; with the rapid development of China's industrial production and economy and the continuous increase of urban population With the increase and the rapid development of urban construction, the discharge of industrial wastewater and domestic sewage is increasing day by day. With the increase of sewage treatment, the sludge production is also increasing rapidly; a large amount of accumulated sludge will not only occupy a lot of land, but also Harmful ingredients such as heavy metals; copper, chromium, arsenic, mercury, cadmium, pathogenic bacteria, parasite eggs, organic pollutants and odor will become a major public hazard affecting urban environmental sanitation; governments at all levels and relevant departments are actively looking for Effective treatment technology. At present, the treatment method of urban sludge in China mainly adopts landfill method to reduce environmental pollution; however, the composition of sludge is relatively complicated, especially heavy metals. If it is not treated and directly filled Burying will pollute the soil and groundwater resources, easily form secondary pollution, and cause harm to the environment; long-term landfills need to occupy a large amount of land resources, how to properly and scientifically dispose of urban sludge to achieve reduction, Stabilization, harmlessness and resource utilization have become one of the major research topics that are widely concerned by researchers in the environmental circles in China and the world