Biomass filtering material

Abstract

The invention relates to a biomass filtering material. The biomass filtering material comprises the following steps: 1, carrying out mechanical pulverization on a plant waste to obtain a raw material A; 2, carrying out steam explosion treatment on the following materials, by mass, 64-66% of the plant waste, 4-7% of animal fur, 8-11% of old clothes, 9-12% of crust, and 9-11% of a plastic waste to obtain a raw material B; and 3, mixing the following materials, by mass, 50-60% of the raw material A, 30-40% of the raw material B, 2-4% of a polyethylene alcoholic solution, 2-5% of a waste coating mixture, and 3-5% of chitosan, uniformly stirring, and carrying out machinery compacting to manufacture the filtering material. According to the invention, most raw materials are recycled and reused, the source is wide, the cost is low, the preparation technology is simple, and heavy metals in water can be effectively filtered out.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a biomass filter material for filtering heavy metals in sewage. Background technique [0002] According to the survey by the National Environmental Protection Agency, the problem of heavy metal pollution in my country's water is very prominent: the pollution rate of the bottom of rivers, lakes and reservoirs is as high as 80.1%; In 2004, the contents of total copper, total lead and total cadmium in Taihu Lake sediments were all at the level of slight pollution; 35.11% of urban river sections had total mercury exceeding the surface water standard of Category III, and 18.46% of the river sections The total cadmium exceeded the standard for Class III water bodies, and samples exceeding the standard for total lead appeared in 25% of the river sections. [0003] Heavy metals not only endanger human safety and affect the growth of aquatic animals and plants, but also in the process of se...

AI Technical Summary

Problems solved by technology

[0003] Heavy metals not only endanger human safety and affect the growth of aquatic animals and plants, but also in the process of sewage treatment, due to the toxicity of heavy metals, they can directly kill biological bacteria, so if heavy metals in sewage are not removed, it will directly affect the subsequent water treatment. Degradation link

[0004] The traditional methods for removing heavy metal ions in water include: chemical method, which is easy to cause secondary pollution and increase operating costs by adding chemical agents; adsorption method, which uses activated carbon adsorption or humic acid resin, zeolite and other adsorption, the amount of adsorbent required Large, difficult to be used in large-scale production applications; reverse osmosis method, the cost of this method is relatively high, it is difficult to apply in large quantities

The patent document with application number CN201010533375.6 provides a membrane adsorbent for removing heavy metal ions in drinking water and its preparation method. The method is mainly composed of polymer, resin, additive and solvent. The disadvantages of this method are polymer, The additives and solvents are all high-molecular organic substances, which are not only expensive, but also organic substances are odorous and polluting, which does not meet the requirements of environmentally friendly production. In addition, the resin used in this method needs to be cleaned every once in a while, which requires extra manpower. and energy

The above methods are increasingly unable to meet the needs of advanced treatment of inorganic pollutants in terms of treatment efficiency and technical cost.