Bottom mud repair and treatment material for urban black and odorous river channel and preparing method of bottom mud repair and treatment material

A technology for river bottom mud and treatment materials, applied in the direction of biological sludge treatment, etc., can solve the problems of inability to remove pollutants, reduce microorganisms, and high cost, and achieve the effects of reducing dust hazards, improving catalytic efficiency, and low cost

Active Publication Date: 2016-09-07
NANJING INST OF GEOGRAPHY & LIMNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Jiang Hua used pulverized coal, oat stalks, fir, etc. as raw materials to make substrate carriers and added them to the river channel, and then added compound bacteria to repair the river channel sediment (application number 201310388670.0), realizing the utilization of waste resources. It will cause secondary pollution, but when adding complex bacteria, it is directly put into water, the impact and dilution of water flow will reduce the microorganisms on the carrier, resulting in a certain degree of waste
Yang Yang et al. used active porous ecological concrete to cover the surface layer of the sediment, and planted submerged plants on the covering layer to achieve in-situ continuous restoration of the sediment (application number 201510211531.X), but the active covering materials are zeolite and volcanic rock. , activated carbon, etc. The adsorption of pollutants in the sediment is mainly physical adsorption, which cannot completely remove the pollutants in the sediment, and the cost is relatively high

Method used

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  • Bottom mud repair and treatment material for urban black and odorous river channel and preparing method of bottom mud repair and treatment material
  • Bottom mud repair and treatment material for urban black and odorous river channel and preparing method of bottom mud repair and treatment material
  • Bottom mud repair and treatment material for urban black and odorous river channel and preparing method of bottom mud repair and treatment material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1: Laboratory static simulation experiment

[0034] Take the bottom mud from the black and smelly river course and put it into a 1L beaker with a height of 4cm and press 1kg / m 2 Add restoration materials and mix well, take river water filtered through 0.45μm as overlying water. The material preparation process is the same as above, the composition weight ratio: CaO 2 Powder 40 parts by mass, MgO 2 30 parts by mass of powder, 10 parts by mass of modified attapulgite clay, 25 parts by mass of EM bacteria dry powder (EM bacteria powder was purchased from Cangzhou Huayu Biotechnology Co., Ltd.), 5 parts by mass of modified nano titanium dioxide. After 10 days, the sediment was taken for testing. The results are shown in Table 2.

[0035] Table 2 Index Comparison

[0036]

Embodiment 2

[0037] Example 2: Black and smelly river simulation experiment

[0038] Use plexiglass as a material to make a cuboid box as a simulated river. The box is 1m long, 0.3m wide, and 0.3m high. Excavate an appropriate amount of black and odorous river sediment and lay it on the bottom of the simulated river. The laying thickness is 0.1m, and the black and odorous river is extracted. The river water is discharged into the simulated river channel as the overlying water, the water level is maintained at 0.2m, and the inflow flow rate is 0.03m 3 / d, after simulating the stable operation of the river channel, the sediment is repaired with repair materials. The material preparation process is the same as above, and the composition weight ratio: CaO2 powder 42 parts by mass, MgO2 powder 25 parts by mass, modified attapulgite clay 6 parts by mass, EM bacteria dry powder 20 parts by mass, zeolite powder 5 parts by mass, 2 parts by mass of modified nano-titanium dioxide, and 1 part by mass...

Embodiment 3

[0041] Example 3: A certain river has a total length of 1000m and a water area of ​​30,000m 2 , water storage capacity 20,000 m 3 , the water source is mainly rainwater, and domestic sewage is discharged in, and the flow rate is slow, which belongs to a typical urban black and smelly river. The river channel is repaired with sediment, and the dosage ratio is 1kg / m 2 , Restoration material composition weight ratio: CaO2 Powder 45 mass fraction, MgO 2 26 mass fractions of powder, 5 mass fractions of modified attapulgite clay, 23 mass fractions of EM bacteria dry powder, and 1 mass fraction of modified nano titanium dioxide. One month after adding the repair material, the odor situation improved significantly. The test results of the bottom mud are shown in Table 4.

[0042] Table 4 Index Comparison

[0043]

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Abstract

The invention relates to a bottom mud repair and treatment material for an urban black and odorous river channel and a preparing method of the bottom mud repair and treatment material. The bottom mud repair and treatment material for the urban black and odorous river channel and the preparing method of the bottom mud repair and treatment material can be applied to the technical field of bottom mud repair of urban black and odorous river channels. Raw materials for preparing the filler include CaO2, MgO2, attapulgite clay, dry EM powder and nanometer titanium dioxide. All the raw materials are pretreated with specific steps respectively and then evenly mixed according to a specific proportion, and the powder material is formed. The repair material is evenly mixed with the bottom mud of the urban black and odorous river channel in situ, nitrogen, phosphate and organic matter in the bottom mud can be effectively removed, stinks can be eliminated, and the effect of controlling source pollution in the river channel can be achieved.

Description

technical field [0001] The invention relates to the technical field of urban black and odorous river channel treatment, in particular to a material for repairing and controlling urban black and odorous river channel bottom mud and a preparation method thereof. Background technique [0002] The sources of water pollution can be divided into internal sources and external sources. In the process of treating polluted water bodies, in addition to cutting off or controlling external source pollution, the impact of internal source pollution cannot be ignored. After the pollutants enter the water body, they will eventually be deposited in the bottom mud through precipitation, adsorption and other ways and accumulate gradually. Due to continuous enrichment and accumulation, the concentration of pollutants such as nitrogen, phosphorus, oxygen-consuming organic matter, and refractory organic matter in the sediment of the polluted water body is often an order of magnitude multiple of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/02
CPCC02F11/02
Inventor 柯凡李文朝周峰潘继征何延召范帆
Owner NANJING INST OF GEOGRAPHY & LIMNOLOGY
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