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City and town river and lake water ecological restoration method based on new restoration mode of mud first and water second

A restoration model and ecological restoration technology, applied in the field of environmental engineering, can solve the problems of long restoration time of the ecosystem at the bottom of the river and the inability to quickly improve the urban black and odorous rivers, etc. The effect of reconstruction

Active Publication Date: 2022-01-07
PEARL RIVER HYDRAULIC RES INST OF PEARL RIVER WATER RESOURCES COMMISSION
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, there is still an urgent need for an in-situ restoration of river sludge and a micro-ecological reconstruction method to solve the problems that the existing technology cannot quickly improve the water quality of black and odorous rivers in cities and the long recovery time of the ecosystem at the bottom of the river

Method used

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  • City and town river and lake water ecological restoration method based on new restoration mode of mud first and water second
  • City and town river and lake water ecological restoration method based on new restoration mode of mud first and water second
  • City and town river and lake water ecological restoration method based on new restoration mode of mud first and water second

Examples

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Effect test

Embodiment 1

[0058] This embodiment is an in-situ bioaugmentation treatment technology for polluted sediment in an anaerobic environment. The details are as follows:

[0059] The test channel A of a certain city in southern my country has been in the state of black and odorous water for a long time. The depth of the local sediment reaches 20cm, the odor is obvious, and the aquatic fish is scarce. Using the SedCaN material of the present invention to carry out in-situ sediment treatment and water quality improvement, the main implementation steps are as follows:

[0060] (1) Stable hydraulic conditions. The application of SedCaN particles has two requirements for the hydraulic conditions of rivers and lakes. One is to limit the flow conditions of the river, control the erosion of the surface sediment by the water flow, and provide conditions for the stable decontamination performance of SedCaN particles to ensure the treatment efficiency of sediment pollutants; Second, under the condition ...

Embodiment 2

[0069] This embodiment is an in-situ contaminated sediment remediation technology under the mode of "soil first, water second", and the details are as follows.

[0070] The experimental river channel B in a city in southern my country is the "Duantou Chung" adjacent to the old city and the vegetable market, with a length of about 600m, an average width of about 6m, and an average water depth of 1.1m. As domestic sewage and a small amount of industrial wastewater are directly discharged into the river, the bottom mud is thick and the water ecosystem is seriously damaged. This example adopts the water ecological restoration method of "mud before water" mode. First, use SedCaN materials to quickly remove oxygen-consuming substances at the mud-water interface of rivers in an anaerobic environment; secondly, install multi-corridor functional flora for domestication and spreading The equipment uses the surface sediment and water body of the river channel B to domesticate the indigen...

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Abstract

The invention discloses a city and town river and lake water ecological restoration method based on a new restoration mode of mud first and water second. The method is used for city and town river and lake bottom mud in-situ restoration and micro-ecological reconstruction, and comprises the following steps: synchronous reduction of anaerobic bottom mud carbon, nitrogen and sulfur pollutants is realized through SedCaN particles, based on microbial acclimatization and spreading, in-situ regulation of a bottom mud microbial community structure is realized, and construction of an aerobic microbial ecosystem is realized. According to the invention, the river and lake pollution in-situ treatment mode and method have the advantages of low energy consumption, low cost, higher efficiency, higher comprehensiveness and higher safety, can realize an in-situ treatment target of construction of a water body-bottom mud healthy ecological system and collaborative reduction of pollutants, can remove 95% of oxygen consumption pollution such as bottom mud sulfide and the like within 15 days, basically eliminates black and odorous bottom mud, solves the technical bottleneck that the natural environment of the polluted bottom mud is difficult to quickly recover by an aerobic process, shortens the construction period by more than 30 days, and can save the cost by more than 40-50%compared with a desilting scheme.

Description

technical field [0001] The present invention relates to the technical field of environmental engineering, in particular to a method for urban river and lake pollution control based on the new restoration model of "soil first, water second", which is used for treating black and odorous bottom mud of river courses, purifying water quality and reconstructing microbial ecosystems. Background technique [0002] At present, there is a common problem of sediment pollution in urban rivers and lakes. The organic matter, nitrogen, sulfur and other substances released from heavily polluted sediment will seriously damage the urban water ecological environment. Considering that some pollutants that exceed the carrying capacity of rivers and lakes still enter urban rivers after the standard treatment, and at the same time, a large amount of non-point source solid waste flows into urban rivers with rainwater runoff, and some pollutants are finally stored through sedimentation and particulat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/04C02F11/02C02F3/34C02F3/02C02F101/16C02F101/30
CPCC02F11/04C02F11/02C02F3/348C02F3/02C02F2103/007C02F2303/06C02F2303/02C02F2101/163C02F2203/006C02F2209/22C02F2101/30C02F2209/38C02F2305/06C02F2209/14C02F2101/16Y02W10/10
Inventor 陈文龙罗欢杨旭楠李宁陈军李丽
Owner PEARL RIVER HYDRAULIC RES INST OF PEARL RIVER WATER RESOURCES COMMISSION
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