Liquid-state mulching film taking sludge as skeleton and preparation and use methods of liquid-state mulching film

Abstract

The invention belongs to the technical field of mulching films and particularly discloses a liquid-state mulching film and preparation and use methods thereof. The main technical scheme is as follows: the preparation and use methods comprise the steps of taking sludge, and adding a sterilizing agent prepared from water-dissolved trichloroisocyanuric acid, so as to deodorize and sterilize; then, adding humic acid raw powder, inorganic salts and water, mixing, stirring and homogenizing, then, grinding and reacting, so as to prepare a master batch formed by a paste body; taking polyacrylamide and derivatives thereof, lignosulfonate or / and cellulose derivatives, so as to form a sub-material with film forming, penetration, dispersion, chelation and water retention properties; during use, dissolving the sub-material by water, adding the dissolved sub-material into the master batch, stirring to prepare a porridge-like body, then, adding water, uniformly stirring and diluting, and spraying by a mist sprayer, thereby forming the mulching film. The liquid-state mulching film is prepared in a manner that the sludge serves as a main material, so that the problem of sludge treatment is basically solved, especially, the waste is changed into the valuable, and the land capability can be greatly increased; the liquid-state mulching film has the functions of increasing temperature, preserving soil moisture and promoting crop growth, the elimination of white pollution is realized, the flying dust factor of agriculture is controlled, the soil is improved, water resources are conserved, the revenue of farmers is increased, the expenditure of farmers is reduced, and the sustainable development of agriculture is promoted.

Description

technical field [0001] The invention belongs to the technical field of plastic film, and in particular relates to a fully degradable liquid plastic film with high fertilizer efficiency sludge as a skeleton produced by using sludge as a main raw material, a preparation method and a use method thereof. Background technique [0002] Municipal sewage plant sludge is organic matter, microbial micelle and other sedimentary substances produced during sewage treatment, as well as residues such as froth floating on the surface of sewage, which contains a large number of pathogenic bacteria, parasites, pathogenic bacteria and heavy metals. How to further process and dispose of the sludge is a major problem in the field of environmental protection worldwide. Currently only a small amount of sludge is disposed of through landfill, incineration or composting. However, landfill has the problems of large landfill volume and large amount of leachate that pollutes groundwater sources; i...

AI Technical Summary

Problems solved by technology

However, landfill has the problems of large landfill volume and large amount of leachate that pollutes groundwater sources; incineration has the problems of low calorific value and dioxin pollution to the atmosphere; comprehensive utilization after composting has stench. Filtrate and external materials, low fertilizer efficiency and heavy metal pollution

[0003] In 2010, China's national sludge production was as high as 28.5 million tons, 80% of which were not treated, and some were piled up in the open air; Mountains, mosquitoes and flies are born, causing secondary pollution and environmental safety hazards, seriously threatening human health, and making sewage treatment lose its real meaning; moreover, with the further development of urbanization, the accumulation of sludge will increase, increasing pollution. The safe disposal of mud is urgent