CN104418434A

CN104418434A - Polluted water restoration method

Info

Publication number: CN104418434A
Application number: CN201310373112.7A
Authority: CN
Inventors: 蒋华
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-08-26
Filing date: 2013-08-26
Publication date: 2015-03-18

Abstract

A polluted water restoration method is as follows: removal of organic matter and other pollutant-enriched bottom mud out of water is not needed, only the surface layer bottom mud aeration is needed, by surface layer bottom mud oxygenation and degradation of organic matters in the bottom mud, the redox potential is reduced, dissolved oxygen in bottom water is increased, the environment growth of aquatic plants is improved, and the polluted water restoration method is a method for treatment and long-term maintaining of polluted water ecological environment by aquatic plant (underwater forest) restoration.

Description

A kind of restoration methods being subject to polluted-water

Technical field

The present invention relates to contamination data analysis field, particularly relate to a kind of restoration methods being subject to polluted-water.

Background technology

Along with developing rapidly and urbanization process of Chinese industrial or agricultural, trade effluent and sanitary sewage quantity discharged increase day by day, according to the investigation of several years, the most urban lakes water body serious eutrophication of China, due to water pollution, transparency declines, and suppresses submerged plant growth, causes aquatic vegetation general disruption.And submerged vegetation is once destroy, after becoming plant plankton dominant algae type lake, due to organic accumulation, the character of bed mud changes, and hydrophyte restoration becomes very difficult.Submerged plant is described as submerged forest, play a part very important to the maintenance of aquatic ecosystem, in the water body of serious pollution, recover the indices that submerged vegetation can improve water greatly, therefore pay the utmost attention to the recovery of aquatic vegetation at the ecological management of many water bodys.

In many water bodys, particularly serious pollution water body, bed mud organic content is high, and the recovery of aquatic vegetation is very difficult, because the environment that the growth needs of the root system of plant is cleaner.Therefore, usually thicker to mud, first the water body that organic content is high carries out Sediment Dredging.But the expense of Sediment Dredging is very high, produce new pollution simultaneously, and after being removed by most active for the top layer degradation of contaminant bed mud being rich in microorganism, greatly reduce the self-purification function of water body itself.

Summary of the invention

Technical problem to be solved by this invention is: provide a kind of restoration methods being subject to polluted-water, the method takes a kind of method of bed mud oxygenation to improve the method for the chemical property of bed mud, and auxiliary plant fixing recovers, to reach the effect steady in a long-term of water correction.

The technical solution adopted for the present invention to solve the technical problems is: first stirred by the sediments of water bottom, then the oxygen replenishing equipment aeration by arranging at water body, makes sediments be suspended in water; Then by microorganism abundant in sediments and water oxygen gas, the organism accumulated in sediments is thoroughly degraded, and after settling, lower floor's bed mud is covered, form one and can adapt to waterplant survival and growth needs, the dirt bed of isolation lower floor bed mud stripping organism effect can be played again; Utilize the submerged plant of survival, a large amount of absorption water Middle nutrition material, and improve substrate dissolved oxygen, form the dominant ecotope of waterplant, polluted water body is restored.

The present invention with traditional to be reached by means such as Sediment Dredgings recover aquatic vegetation method compared with, its major advantage is: equipment is simple, and easy to operate, do not produce new pollutent, without ecological risk, low cost, easily promotes the use of.

Embodiment

The present invention is that the bed mud of the enriching pollutants such as organism is shifted out water body by a kind of need, only need by sediments aeration, by the organism accumulated in sediments oxygenation and this bed mud of degraded, reduce redox potential, improve the dissolved oxygen of bottom water, improve aquatic plants growth environment, recover to administer polluted water body ecotope and the long-term method kept by waterplant (submerged forest).

Below in conjunction with embodiment, the invention will be further described.

First specific equipment is adopted (to have the equipment making bed mud stir function, fluidic device as commercially available) sediments of about for water bottom 10 ~ 30cm is stirred, then oxygen replenishing equipment (the such as commercially available surface aerating machine by arranging at water body, the oxygen replenishing equipments such as aeration boat) aeration, sediments is made to be suspended in water, by microorganism abundant in sediments and water oxygen gas, the organism accumulated in sediments is thoroughly degraded, form the bed mud that one deck can adapt to aquatic plants growth needs, and after process terminates, pass through natural subsidence, cover on lower floor's bed mud, the effect of the bed mud that the pollution substances such as isolation lower floor organism enrich can be played, the effect of lower floor's bed mud nutritive substance stripping is weakened greatly, with this understanding, submerged plant energy long-term surviving, and submerged plant is once survival, water Middle nutrition substance is absorbed in a large number, and improve substrate dissolved oxygen, form the dominant ecotope of waterplant, polluted water body is restored.

The surface water such as lake, landscape water body that present method can make polluted water body such as be polluted is restored.

Be subject to polluting pond water quality purification as present method is once applied to one, this pond enters owing to there being a large amount of sanitary sewage for a long time, and for cultured fishes, water quality worsens year by year, and show as water colour blackout, suspended substance is many, bed mud is black smelly, give out bad smell in summer, and have the phenomenon of blue algae bloom, often cause dead fish.The content being 22.1, BOD to the content of COD in lake water before this pond treatment is 26.8, and silt from the bottom of lake thickness reaches more than 0.5m, black, severe depletion of oxygen, without submerged plant growth, is taken out by this bed mud and is placed in laboratory and plants planting submerged plant and also cannot survive.After this zonule, pond one and other waters are isolated, by ejector, mud thick for top layer, end 25cm is rushed, auxiliary aerator makes these mud all the time in suspended state again, continue process 3 ~ 4 days, after stopping process, after sediment sedimentation, can be observed the water layer transparency after processing obviously to increase, bed mud is brown color, and the content being reduced to 14.1, BOD by the content measuring COD in discovery water reduces to 16.3.And in this zonule, transplant some submerged plants, as hornwort, poly-grass, eel grass etc. all can well grow, and illustrate by the method process, the physico-chemical property of water body has had obvious improvement, and bed mud changes Adaptable growth into by being not suitable for submerged plant growth.The visible process by this method, the large amount of organic in water body and bed mud obtains degrades thoroughly, and the anoxic conditions of bed mud is significantly improved, and the nature and function of bed mud are able to obvious recovery.

Due to the water body polluted, particularly the degeneration of the submerged vegetation in lake is universal phenomenon, and the recovery of the recovery of submerged vegetation to Ecology is extremely crucial and important, and the physico-chemical property improving bed mud is the key that submerged plant recovers, therefore present method is the usability methods that a kind of recovery is subject to the polluted-water ecosystem.

Claims

1. by a restoration methods for acute polluted-water, it is characterized in that: first the sediments of water bottom is stirred, then the oxygen replenishing equipment aeration by arranging at water body, make sediments be suspended in water; Then by microorganism abundant in sediments and water oxygen gas, the organism accumulated in sediments is thoroughly degraded, and after settling, lower floor's bed mud is covered, form one and can adapt to waterplant survival and growth needs, the dirt bed of isolation lower floor bed mud stripping organism effect can be played again; Artificial field planting submerged plant on this dirt bed, utilizes the submerged plant survived, a large amount of absorption water Middle nutrition material, and improves substrate dissolved oxygen, forms the dominant ecotope of waterplant, polluted water body is restored.

2. the restoration methods of polluted water body according to claim 1, is characterized in that: sediments refers to that down the degree of depth is the bed mud of 10 ~ 30cm from the surface of the bed mud of water bottom.

3. the restoration methods of polluted water body according to claim 1, is characterized in that: polluted water body refers to the surface water of contaminated lake or landscape water body.