System and method for improving black and odorous riverway water quality through micro-aeration and submerged plants

A technology of submerged plants and micro-aeration, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of weakened water purification capacity, difficulty in planting submerged plants, black and odorous Problems such as low transparency of the river channel, to achieve significant effects of promoting growth, improving polluted sediment, and improving water quality

Active Publication Date: 2016-05-04
NANJING INST OF GEOGRAPHY & LIMNOLOGY
View PDF10 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The problem to be solved by the present invention is to screen submerged plants suitable for the growth of black and odorous water bodies; the transparency of black and odorous rivers is low, and it is diff

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • System and method for improving black and odorous riverway water quality through micro-aeration and submerged plants
  • System and method for improving black and odorous riverway water quality through micro-aeration and submerged plants

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A system for improving the water quality of black and odorous rivers and restoring ecology by using submerged plants. The construction method includes the following steps:

[0022] 1. Intercept waste water from external sewage outlets. Prohibit unreasonable and illegal sewage discharge, and close sewage outlets.

[0023] 2. River channel aeration adopts microporous aeration at the bottom of the river. A microporous aeration disc is installed at the bottom of the river channel at a distance of 30 cm from the surface of the sediment. The diameter of the uppermost end of the microporous aeration disc bracket is 25 cm, and the diameter of the bottom circle is 40 cm. There are 4 layers in total. There are 3 layers of coiled microporous aeration tubes at the upper end, the distance between the two layers at the bottom is 30cm, and the installation density of microporous aeration disks is 1 piece / 50m 2 , The air output of the aeration pan is based on not lifting the surface s...

Embodiment 2

[0027] Example 2: Water Restoration Project for Black and Odor Bank Section of Jiyang Beach, Nanhu District, Jiaxing City

[0028](1) First, in February 2014, in the project area to be implemented for water quality restoration, the main pipeline and branch pipelines for sediment micro-aeration were laid, and microporous aeration discs were installed at the bottom of the river channel at a distance of 30 cm from the surface of the sediment. The diameter of the uppermost part of the aeration disc bracket is 25cm, and the diameter of the bottom circle is 40cm. There are 4 layers in total. The 3 layers at the upper end are coiled with microporous aeration tubes. The distance between the 2 layers at the bottom is 30cm. 2 , the volume of air out of the aeration pan is 5m 3 / m 2 h.

[0029] (2) Install submerged plant bearing beds. 1) The bearing bed body is made of 6-point galvanized iron pipe and galvanized elbow into a rectangular frame with a size of 1m×2m, and a three-dimensi...

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

No PUM Login to view more

Abstract

The invention provides a system and method for improving black and odorous riverway water quality through micro-aeration and submerged plants. Black and odorous riverway contaminated bottom silt is improved through bottom layer micro-aeration, release of contaminants of the bottom silt is controlled, growth of the submerged plants is assisted, and ammonia nitrogen is reduced. Meanwhile, according to the seasonal change of the plants, evergreen submerged vegetation is established through an elodea nuttallii-eel grass combination, accompanying species of ceratophyllum demersum, myriophyllum spicatum and hydrilla varticillata are planted in an assisted mode, the stable submerged vegetation is established, and the purpose of improving the riverway water quality is achieved. The problem that the transparency is low in the initial stage of a black and odorous riverway water quality improvement project is solved through a floating bed capable of ascending and descending through introduction of the submerged plants. The probability of establishment of the specific submerged vegetation in a black and odorous riverway is verified, water quality improvement is remarkable, operation is easy, the project amount is small, and the system and method are economical and practical.

Description

technical field [0001] The invention belongs to the field of water environment treatment and ecological restoration, and specifically relates to river pollution treatment, ecological restoration and water body landscape construction technology. Background technique [0002] Due to the long-term input of pollutants in urban rivers, the pollution load of rivers increases, which is not enough to complete the transfer and degradation of pollutants, the self-purification ability of water bodies decreases, and the habitat of rivers is destroyed, leading to the degradation of river ecosystems. At the same time, due to the long-term retention of urban rivers, a large amount of nutrients and heavy metals are seriously accumulated and deposited in the sediment, forming a vicious circle, and the polluted sediment has also become an endogenous source of pollution. In addition, the hardening of urban river slopes has cut off the natural ecological chain of the river, making the function ...

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
IPC IPC(8): C02F3/32C02F3/02
CPCC02F3/02C02F3/32C02F3/322C02F2103/007Y02A20/402Y02W10/10
Inventor 陈开宁古小治孙淑云黄蔚刘淼
Owner NANJING INST OF GEOGRAPHY & LIMNOLOGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap