Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for constructing near-natural complex water bank ecological zone by utilizing sludge/waste residue combination

An ecological belt and sludge technology, applied in water/sludge/sewage treatment, chemical instruments and methods, multi-stage water/sewage treatment, etc., can solve the problems of high cost, poor ecosystem heterogeneity, and high equipment investment, and achieve Improve the effect of ecological and landscape functions

Active Publication Date: 2019-02-19
QUANZHOU NORMAL UNIV
View PDF6 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the traditional use of cement, lime, and gypsum to solidify the sludge, it is difficult to green the sludge with high salinity and alkalinity. The relatively new achievements in this field are "a construction method for high-concentration dredging and highly dehydrated sludge that does not use storage yards", Zhu Wei etc., Publication No.: CN102433906A utilizes high-pressure gas and sludge mixed conveyance-the method of pressing dewatering to improve dredging sludge dewatering capacity, effectively avoids the doping of saline-alkaline additives, is conducive to afforestation, and theoretically if using Oxygen can also deodorize as a high-pressure gas, but the equipment investment is high, and it cannot be used when the sludge contains a large number of masonry fragments; the traditional sludge yard greening needs to wait until the sludge is approximately dry, under the action of microorganisms and oxygen, from the pioneer plant It usually takes a few years to start to implement gradually. During this period, it is difficult to solve the odor pollution of sludge and the pollution caused by heavy rain, and it is difficult to implement on the riverbank where there are many human activities.
[0006] The river and lakeside green belt is a key area for dealing with non-point source pollution. It is usually a soil-grass-shrub-arbor belt with a high density of vegetation. It can intercept river and lake surface runoff sewage and solid waste from entering rivers and lakes. It also has the function of slope protection. At present, foreign soil and terrestrial plants are basically used for construction. The cost is high, and the heterogeneity of the formed ecosystem is poor, which is different from the naturally formed waterfront transitional ecosystem.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] In the treatment of black and smelly rivers in a schoolside village in Quanzhou City, Fujian Province, due to environmental restrictions, the sludge has nowhere to be disposed of, and the water content is high and smelly. In order to deal with the regular dredging sludge in the pit and dam area, the technical solution of the present invention is adopted: Use geotextile bags to fill coal cinders on the river bank slopes as cofferdams. The width between the cofferdams is about 1 meter. A total of three layers of cofferdams are made into terraces, which are used sequentially from top to bottom. The conversion ditch in the cofferdam is filled with about 10 cm thick silica powder-sea oyster shell underlying surface to reduce infiltration and fill the foundation. On the side of the cofferdam, about 1.5 meters are planted with miscanthus and water spinach as slope-stabilizing plants to absorb nutrients and intercept garbage. After the root system of miscanthus has grown in larg...

Embodiment 2

[0049] The small-scale dredged sludge dump was used as the test, and the dredged sludge dump was directly used as a conversion ditch. The steel slag bag wall was placed on the outside of the dump as a seepage cofferdam, and the outer layer was made of ecological concrete protection enclosure and planted with wet raw plants. The selection of plants in the cofferdam is mainly emergent plants and hygrophytes, and the method is as follows:

[0050] Using buoyancy boards and long rods as construction tools, insert the biodegradable and filtered planting packing tube into the dredged sludge dump according to 20% of the total sludge volume, close to the bottom of the dump. The total thickness of the sludge is about 1.2 meters, the diameter is 15 cm, and the length is 1 The rice degradable filter planting filler tube is additionally dipped with 1-2% gypsum debris-based composite calcium salt mud flocculation fixative to make the mud form a weakly solidified layer and avoid blocking th...

Embodiment 3

[0054]Quanzhou seaside, port dredging and silt greening yard trial

[0055] The greening of salinized sludge dumps is a long-term problem in the industry. Using the scheme of the present invention, in the large-scale test, 6 large-scale conversion ditches in the form of "mesh-shaped" seepage walls were made with construction waste bags as enclosures, and the ditches were pre-filled with compound A thin layer of stone powder is used as an isolation cushion, poured into the excavated silt, and inserted into a biodegradable filter planting filler tube according to 10% of the total silt volume, with a diameter of 30 cm and a length of 0.5 meters. Recipe for Example 2.

[0056] A large amount of salt water is mainly discharged through the sand enclosure, and part of it enters the biodegradable filter planting packing cylinder, and is pumped out. When the silt no longer seeps, fresh water containing a small amount of calcium and magnesium ions is injected into the degradable filteri...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for constructing a near-natural complex water bank ecological zone by utilizing sludge / waste residue combination, which comprises the following steps of: 1) manufacturing a water filtering cofferdam at the periphery of a conversion ditch, manufacturing an ecological concrete protection enclosure at an outer side of the cofferdam, and planting wet plants; 2) pretreating the sludge; 3) putting the sludge into the cofferdam, inserting a degradable and filtered planting filler cylinder into the sludge and planting plants; 4) during a placing process of the sludge lumps, making part of the sludge seepage flows out through the cofferdam and be filtered and purified through the wet plants; making part of the sludge seepage flows into the planting filler cylinder and be pumped away by a water pump; 5) along with time, enabling the sludge be gradually dried, the degradable and filtered planting filler cylinder be gradually degraded, and the plants rapidly grow and cover the whole conversion ditch. By the adoption of the method for constructing the near-natural complex water bank ecological zone by utilizing the sludge / waste residue combination,the problem ofnear disposal of desilted sludge is solved, meanwhile, the problem of resource utilization of other industrial waste residues is solved, a near-natural complex water bank ecosystem is formed, and ecological and landscape functions of the river bank are greatly improved.

Description

technical field [0001] The invention belongs to the field of waterfront construction and environmental protection, and in particular relates to a method for constructing a near-natural and complex waterfront ecological belt by combining mud / waste residue. Background technique [0002] With the increasing pressure of environmental protection, the problem of dredging sludge having nowhere to go is becoming more and more obvious. A more realistic idea is to convert dredging sludge with low harmful components into garden soil near the banks of rivers and lakes. Planting plants to green the banks of rivers and lakes will correspondingly face problems such as the stability of river and lake embankments, odor, leaching water purification, surface runoff scour, drying speed, conversion of silt into soil, and plant selection. [0003] At present, for a long period of time, dredging and demolition wastes of old rivers and lakes coexist and there is no place for landfill. The depressio...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
CPCC02F1/001C02F3/32C02F3/34
Inventor 陈楷翰陈昱霖
Owner QUANZHOU NORMAL UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products