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
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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...
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