6 results about "Land improvement" patented technology

The application discloses a sludge directional hydroxyl radical wall-breaking drying and deodorization method and system, and belongs to the technical field of sludge harmless and resourceful treatment. The application generates hydroxyl radicals in-situ in a sludge system by nano-catalytic coupling with a weak electric field, and makes the hydroxyl radicals preferentially act on microbial cell walls and malodorous substances by precisely controlling the concentration of the hydroxyl radicals, the reaction time and the pH of the system, so that cell wall breaking, water releasing, dehydration drying and source deodorization are realized. Meanwhile, the deep oxidation and mineralization of macromolecular organic matter are inhibited, and the organic carbon source and nutrient components are maximally reserved. The moisture content of the treated sludge is significantly reduced, the sludge is odorless, the organic matter retention rate is greater than or equal to 85%, and the sludge can be directly connected with anaerobic digestion, aerobic fermentation composting or land improvement utilization. The application has the characteristics of fast treatment speed, low energy consumption, no secondary pollution and strong resource connection, solves the problems of long cycle of traditional processes, malodorous emission and organic matter loss caused by excessive oxidation, and is suitable for efficient pretreatment of high-organic sludge such as municipal sludge and food sludge.

A method for transforming saline-alkali land, in the field of land improvement technology, includes the preparation of wood ash granules, the preparation of mixed organic matter granules, granule mixing, and precise determination of application amount. It provides a novel and comprehensive method for transforming saline-alkali land by utilizing the resources of waste from biomass power plants and combining it with a specific organic matter formula to reduce soil alkalinity and significantly improve soil permeability, water retention, and fertility, thereby transforming saline-alkali land into fertile land suitable for crop growth.

This invention discloses a natural force-driven soil surface evaporation and salt removal system and its application method, belonging to the technical field of saline-alkali soil treatment and salt resource recovery equipment. It includes a soil tank, a bottom drawer, a connecting drawer, a top cover, a water supply system, and a circulating ventilation system. The soil tank contains desalinated soil. Both the bottom drawer and the connecting drawer are open-top shells. The lower end of the bottom drawer is fixedly connected to the top of the soil tank (open at the top), and the upper end is connected to the bottom of the connecting drawer. The top cover is transparent and fits over the top of the connecting drawer. The water supply system supplies water to the desalinated soil in the soil tank, and the circulating ventilation system facilitates vertical convection ventilation of the hot air above the desalinated soil. This invention utilizes the dual driving forces of radiative evaporation and soil-water potential to drive saline water in the soil to the soil surface, separating water vaporization and salt crystallization. The crystallized salt is then manually scraped off, achieving resource utilization of salt and solving the problems of high cost, low efficiency, and difficult desalination in existing saline-alkali land improvement methods.

This invention discloses a rapid remediation isolation membrane and permeable blind pipe laying equipment and method for constructing topsoil-subsoil salt-cutting plots, relating to the field of saline-alkali land improvement. It pioneers a non-excavation in-situ membrane laying technology, integrating modules such as a disc plow (2), a serrated separating plow (3), a soil conveying system (4), an HDPE geomembrane laying mechanism (5), and a permeable blind pipe laying device (6). The disc plow (2) cuts and shapes the field ridges (9), and the serrated separating plow (3) separates the topsoil layer (10) and subsoil layer (11). An HDPE geomembrane (12) is simultaneously laid and vertically attached to the ridges to form a three-dimensional barrel-shaped salt-cutting structure. Permeable blind pipes (13) are laid simultaneously, and soil amendments are added during backfilling. This invention completely blocks saltwater migration, solving the problems of recurring and costly traditional treatment methods, creating conditions for residual salt management and biological improvement, and is suitable for rapid remediation and topsoil reconstruction of saline-alkali land.

This invention discloses a land maintenance method and apparatus suitable for the cultivation of Suaeda salsa in wetland areas, relating to the field of ecological restoration and land improvement technology. Ecological restoration is achieved through an ecological restoration fertilizer comprising: 30-60 parts Suaeda salsa powder, 30-60 parts segmented Suaeda salsa grass, and 1-5 parts fermentation agent. The preparation method of the ecological restoration fertilizer includes the following steps: harvesting Suaeda salsa mother grass on land; dividing the obtained Suaeda salsa mother grass into two parts; pulverizing the first part and passing it through an 80-100 mesh sieve to obtain Suaeda salsa powder. This invention uses harvested Suaeda salsa mother grass as raw material to prepare an ecological restoration fertilizer. The resulting fertilizer has sufficient nutrients and a high microbial content, making it suitable for soil improvement in coastal tidal flats. It can enhance soil fertility, improve soil permeability, prevent soil compaction, and promote strong root development when planting Suaeda salsa.

This invention relates to the field of saline-alkali land improvement technology. This invention provides a method for improving saline-alkali land based on crop rotation, comprising the following steps: (1) preparing the land surface, deep plowing and laying drainage pipes; (2) planting Suaeda salsa and sweet sorghum in the first year, and after harvesting, crushing the plants and returning them to the field; (3) planting peas and celery in the second year, and after harvesting, crushing the straw and returning it to the field; (4) planting Jerusalem artichoke in the third year, applying well-rotted organic fertilizer and bio-fertilizer during this period, and after harvesting, crushing the straw and returning it to the field. This invention's technical solution, through scientific crop rotation, optimized planting process, and supporting management measures, not only significantly improves the effect of saline-alkali land improvement, but also solves the problems of easy secondary pollution, prominent continuous cropping obstacles, and low crop yield and quality existing in existing improvement methods. The entire improvement process is green and environmentally friendly, with no pollutant emissions, and is suitable for the long-term sustainable improvement and utilization of moderately saline-alkali land.