CN-121990742-A - Biological restoration and greening method for lake and river silt

Abstract

The invention provides a biological repair and greening method for sludge in lakes and rivers, which sequentially comprises the steps of carrying out pretreatment operation of surface cleaning and drainage on sludge sites in the lakes and rivers, sowing in a first season after applying microbial fertilizer to the sites, carrying out soil improvement and tillage operation on the sites, applying biological organic fertilizer, modifier and biological bacteria to the sites after tillage, completing sowing in a second season, carrying out construction and green planting maintenance of machine tillage paths of the sites, and finally completing site inspection and acceptance. The invention adopts a composite technical means of combining bioremediation with green planting consolidation, solves the technical problems of high cost and tail water discharge problem of the traditional lake and river sludge treatment, and has extremely high cost performance compared with the traditional treatment modes of sludge filter pressing and vacuum preloading drainage. The repairing and re-greening method has the advantages that the construction period is controllable, the whole construction period from sludge site treatment to farmland transformation completion is only 9 months to 1 year, the construction efficiency is greatly improved, the whole construction process has no wastewater discharge, the risk of secondary water pollution is avoided, and the environment friendliness is excellent.

Inventors

• LIU XIAGUO
• QIN GUANGLIN
• ZHU LINBO
• LI XIAOXU
• CHEN YONG
• ZHANG QIWU

Assignees

• 浙江高腾环保科技有限公司

Dates

Publication Date

20260508

Application Date

20260324

Claims (7)

1. 1. A biological repair and greening method for sludge of a lake and a river is characterized by sequentially comprising the pretreatment operation of carrying out surface cleaning and drainage on the sludge of the lake and the river, sowing in a first season after applying microbial fertilizer to the sludge, carrying out soil improvement and tillage operation on the sludge, applying biological organic fertilizer, modifier and biological bacteria to the tillage sludge, completing sowing in a second season, carrying out machine tillage road construction and green planting maintenance on the sludge, and finally completing site inspection and acceptance.
2. 2. The method for biologically repairing and re-greening the sludge of the lakes and rivers according to claim 1, wherein the sludge field of the lakes and rivers is a sludge storage field of a water conservancy dredging project, the thickness of an effective soil layer after the field repair is greater than 50cm, the water content of soil in surface soil is not higher than 40%, and the organic matter content is greater than 6g/kg.
3. 3. The method for restoring the biological repair of the sludge in the lakes and rivers according to claim 1, wherein the comprehensive restoration of the field is realized after the first-season sowing, the second-season sowing and the green planting maintenance, and the field after the restoration of the green can reach the standard of the soil bearing capacity of the current Wobbe 1 GZL-220 type self-propelled caterpillar rotary cultivator.
4. 4. The method for restoring biological mud to the green of the lake and river according to claim 1, wherein the soil improvement and tillage are carried out after the sowing in the first season, the tillage is a pre-operation of spreading the bio-organic fertilizer, the modifier and the biological bacteria, and the spreading is uniformly spread on the surface layer of the ploughed field.
5. 5. The method for restoring biological repair to river mud, according to claim 1, wherein said construction of said machine-cultivated road is carried out after the completion of the sowing in the second season, and the maintenance of said green plant is a continuous operation after construction of said machine-cultivated road until the site meets the acceptance criteria.
6. 6. The method for restoring the biological recovery of the sludge from the lakes and rivers according to any one of claims 1 to 5, wherein the overall construction period of the method for restoring the biological recovery is 9 months to 1 year, no waste water is discharged in the construction process, and the sludge treated by the method can be manufactured into landscaping planting soil and farmland planting soil.
7. 7. The method for restoring and greening sludge in lakes and rivers according to claim 1, wherein the microbial fertilizer is a special microbial fertilizer suitable for sludge soil in lakes and rivers, the biological bacteria are functional biological bacteria capable of improving organic matter content of the sludge soil, and the modifier is a soil modifier capable of reducing water content of the sludge soil.

Description

Biological restoration and greening method for lake and river silt Technical Field The invention relates to the technical field of ecological restoration, in particular to a biological restoration and greening method for sludge in lakes and rivers. Background The lake and river silt is used as a main engineering quantity component part of a water conservancy dredging engineering, has the inherent characteristics of high water content, semi-flowability, no bearing capacity and high natural dehydration difficulty, and the stacked silt storage yard not only occupies a large amount of ecological space, but also has obvious potential safety hazard. At present, the main flow treatment modes aiming at the sludge of the lakes and rivers at home are sludge press filtration and vacuum pre-pressing drainage of a sludge storage yard, the treatment modes have the problem of high treatment cost, the treatment cost of each cubic meter of sludge is about 35-45 yuan, meanwhile, the environmental protection problem of tail water discharge needs to be additionally treated, the economical efficiency and the environmental protection performance of the whole treatment mode are all to be improved, and the main technical problems of recycling of the sludge of the lakes and the rivers and ecological restoration of the sludge storage yard are achieved. Disclosure of Invention In view of the above, the invention provides a bioremediation and greening method for lake and river sludge in order to solve the problems in the technical background. The method specifically comprises the following steps: A bioremediation and greening method for sludge of a lake and a river sequentially comprises the steps of carrying out pretreatment operation of surface cleaning and drainage on the sludge of the lake and the river, sowing the sludge of the lake and the river in a first season after applying microbial fertilizer to the sludge, carrying out soil improvement and tillage operation on the sludge, applying biological organic fertilizer, modifier and biological bacteria to the sludge after tillage, completing sowing in a second season, carrying out machine tillage road construction and green planting maintenance on the sludge, and finally completing site acceptance inspection. Further, the lake and river silt field is a silt storage field of a water conservancy dredging project, the thickness of an effective soil layer after field restoration is greater than 50cm, the water content of surface soil is not higher than 40%, and the organic matter content is greater than 6g/kg. Further, after the first-season sowing, the second-season sowing and the green planting maintenance, the comprehensive re-greening of the field is realized, and the field after re-greening can reach the standard of the soil bearing capacity of the passing Walker 1 GZL-220 type self-propelled caterpillar rotary cultivator. Further, the soil improvement and tillage work is carried out after the first season sowing is completed, the tillage work is the front operation of broadcasting biological organic fertilizer, modifier and biological bacteria, and the broadcasting work is the uniform broadcasting on the surface layer of the field after tillage. Furthermore, the construction of the tractor-ploughing road is carried out after the sowing in the second season is completed, and the green planting maintenance is continuous operation after the construction of the tractor-ploughing road until the site meets the acceptance criterion. Furthermore, the whole construction period of the repairing and re-greening method is 9 months to 1 year, no wastewater is discharged in the construction process, and the sludge treated by the method can be manufactured into landscaping planting soil and farmland planting soil. Further, the microbial fertilizer is a special microbial fertilizer suitable for the silt soil of the lake and river, the biological bacteria are functional biological bacteria capable of improving the organic matter content of the silt soil, and the modifier is a soil modifier capable of reducing the water content of the silt soil. By adopting the technical scheme, the method has the following beneficial effects: The invention adopts the composite technical means of biological restoration combined with green planting consolidation, solves the technical problems of high treatment cost and tail water discharge problem of the traditional lake and river sludge, reduces the treatment cost by more than 50 percent compared with the traditional treatment modes of sludge press filtration and vacuum preloading drainage, and has extremely high cost performance. The repairing and re-greening method has the advantages that the construction period is controllable, the whole construction period from sludge site treatment to farmland transformation completion is only 9 months to 1 year, the construction efficiency is greatly improved, the whole construction process has no wastewater discharge, the