CN201092556Y

CN201092556Y - Stagewise compound ecological bed

Info

Publication number: CN201092556Y
Application number: CNU2007201879098U
Authority: CN
Inventors: 张智; 林艳; 阳春; 付国楷; 唐显枝
Original assignee: Chongqing University
Current assignee: Chongqing University
Priority date: 2007-10-09
Filing date: 2007-10-09
Publication date: 2008-07-30
Anticipated expiration: 2017-10-09

Abstract

The utility model discloses a step composite ecological bed, which comprises a step form three-level composite ecological bed and a water collection weir which are adjacent, wherein the water collection weir is arranged between the second level composite ecological bed and the third level composite ecological bed, an inlet pipe is communicated with a perforated water distributor which is arranged on the upper portion of the first level composite ecological bed, raw water is distributed in a drop mode, a perforated water collection pipe which is arranged at the bottom portion of the first level composite ecological bed is communicated with the perforated water distributor of the second level ecological bed, a water collection pipe is arranged at the bottom portion of the second level composite ecological bed to lead water to enter the water collection weir, a water outlet of the water collection weir is communicated with the perforated water collection pipe which is arranged on the upper portion of the third level composite ecological bed, and the bottom portion of the third level composite ecological bed is equipped with the perforated water collection pipe to communicate with the water outlet pipe. The step composite ecological bed optimizes the bed structure and a water distribution system, and uses a no energy consumption strengthening re-aeration technology and a novel filler, thereby outstanding the organic unity of the economical efficiency of the filler and the bed treatment effect. The step composite ecological bed is both capable of being used to repair polluted water body and being used for sewage treatment projects which have low concentration and small scale in a small town (a village), the cost is low, and the treatment effect is steady.

Description

Stairway composite ecological bed

Technical field

The utility model relates to the purification and the recovery technique of polluted water body, is specifically related to be used for the stairway composite ecological bed of polluted water body reparation and purifying domestic sewage processing under filler optimum combination, the different reinforcement reoxygenation mode.

Background technology

Ecological bed is exactly on the basis of artificial swamp form, is that purpose is used for sewage processing system to improve system loading, to reduce floor space and filler expense etc.For polluted water body reparation and cities and towns (villages and small towns) on a small scale, the point of lower concentration, the sewage disposal of face source, characteristics such as ecological bed technology is low with its reduced investment, working cost, convenient management have obtained concern more and more widely.

According to sewage water surface site and water (flow) direction different in ecological bed, it is ecological bed and the undercurrent type is ecological bed to be divided into surface current.

The ecological bed water surface of surface current is positioned at more than the wetland hypothallus, the general 0.3～0.5m of the depth of water, and current are pulling flow type and advance.Sewage slowly flows through the wetland surface from inlet with certain speed, part of contaminated water or evaporation or permeate the ground, and water outlet is flowed out by overflow weir.The ecological bed hydraulic load of surface current is generally lower, reaches under the condition of equal treatment effect, and its floor space is bigger than undercurrent type, and is subject to seasonal effect (can freeze winter, summer foul smelling, mosquitos and flies grow).

According to flow shape in ecological bed, the undercurrent type is ecological bed to be divided into horizontal flow, vertically stream and 3 kinds of forms of combined-flow.The ecological bed current of horizontal flow are from import along continuous straight runs sluggish flow root zone, and captation and water level control apparatus are established in the exit.Horizontal flow is ecological bed owing to aerobic biochemical in the system reacts required oxygen mainly from air reaeration, quantity not sufficient, thereby cause nitric efficiency not high.Vertical ecological bed its water (flow) direction of undercurrent and root zone in vertical state, outlet system generally is located at the wetland bottom, can improve the transfer efficiency of oxygen in sewage and matrix, but the general intermittent water inflow mode that adopts during its operation.The existing horizontal flow of its water body fluidised form of combined-flow undercurrent type wetland also has vertical stream, also can select for use different plant plural serial stages to use simultaneously.

At present, there is following main drawback in existing ecological bed technology:

1. compare with traditional waste water treatment process, ecological bed treatment system floor space is bigger, is generally 2～3 times of traditional treatment method, and wherein surperficial flow pattern is taken up an area of bigger because its hydraulic load is little.Therefore, its application can be restricted in the big city of land used anxiety.

2. the suspended substance that is trapped accumulates in ecological bed bed body, and the continuous growth of bed internal microorganism simultaneously can make the percolation ability of hypothallus weaken, and finally results in blockage, and making undercurrent, ecological bed to become surface current ecological bed, causes processing power to descend; And organic continuous accumulation also can be gradually to ecological bed, and move in the exit, finally influences effluent quality.

3. all there is the insufficient problem of oxygen supply usually in ecological bed system, and this has directly caused nitrogen, phosphorus in the system, and particularly the clearance of nitrogen is not really high, has influenced ecological bed treatment effect.Though taked the measure of artificial oxygenations such as oxygen supply, but there is the big defective of energy consumption in traditional oxygenation way, has reduced ecological bed economic advantages.

In addition, Chinese patent 200510057047.2 " rotating wetland filtering pond+lateral subsurface flow wetland bed waste water treatment system and method " discloses a kind of Sewage treatment systems of holding pond utilization ratio height, power not being provided additionally to provide, its current are that horizontal baffling flows, and are the plane air reaeration; Than current is vertical flowing and drop reoxygenation mode, and efficient is poor; And there is a baroque problem.

Therefore, on existing research basis, develop not only economy but also have a reinforcement reoxygenation step that is suitable for polluted water body reparation and samll cities and towns' sewage disposal of stabilizing treatment effect manually composite ecological bed, to improve and stablize ecological bed treatment effect, the ecological bed application category of expansion has great importance.

The utility model content

At the prior art above shortcomings, the purpose of this utility model provides a kind of be used for polluted water body and sanitary sewage disposal, have simple in structure, floor space is little, does not need additionally to provide power, what treatment effect was stable, efficient is high is stairway composite ecological bed.

The purpose of this utility model is achieved in that stairway composite ecological bed, it is characterized in that comprising adjacent stepped three grades composite ecological bed and be located at the water collecting dike of second and third grade between composite ecological bed, filler is set, filling surface plantation plant in each body respectively; Ecological bed tops at different levels are respectively equipped with the perforation water distributor, and the bottom is respectively equipped with the perforation header;

Water inlet pipe is communicated with the perforation water distributor that the composite ecological bed top of the first step is provided with, and former water is with drop mode water distribution; The ecological bed bottom of the first step is established the perforation header and is communicated with the ecological bed perforation water distributor in the second stage;

Header is established in composite ecological bed bottom, the second stage makes water outlet enter water collecting dike, and the posticum of water collecting dike is communicated with the perforation water distributor of the composite ecological bed top of the third stage;

The composite ecological bed bottom of the third stage is established the perforation header and is communicated with rising pipe.

Described filler adopts large particle-size and light-weight fillers such as gravel or haydite.

The degree of depth that the third stage is manually composite ecological bed, the first step is composite ecological bed and the second stage is composite ecological bed increases successively.

Compared to existing technology, the utlity model has following advantage:

1. optimize ecological bed bed structure and water distribution system, adopted no energy consumption to strengthen the reoxygenation technology, improved dissolved oxygen concentration and denitrification percent.

2. reasonably combined bed body filling kind, grating, filling mode not only satisfy filler economy needs and also improve a body treatment effect.

3. cost is low, and treatment effect is stable.

4. the utility model both can be used for the reparation of polluted water body, also can be applied to lower concentration, the small-scale sewage treatment project in samll cities and towns (villages and small towns).

Description of drawings

Fig. 1 is a floor map of the present utility model;

Fig. 2 is an A-A sectional view of the present utility model.

Embodiment

The utility model is described in further detail below in conjunction with the drawings and specific embodiments.

As shown in Figure 1 and Figure 2, the utility model is stairway composite ecological bed, comprises adjacent stepped three grades of bed bodies 1,2,3, and it is stepped to utilize physiographic relief to be arranged to; Water collecting dike 11 between second and third grade is composite ecological bed; In each ecological bed bed body filler 4,5,6 is set respectively, filling surface plantation plant; Ecological bed

perforation water distributor

7,8,9 and the

perforation headers

12,13,14 of being respectively equipped with at different levels, with the water distribution that carries out different modes with catchment.Former water is entered through

water distributor

7,8,9 water distribution step by step successively by water inlet pipe 15; The filler 4,5,6 that effluent stream disposes in the bed body and under the acting in conjunction of botanical system of plantation, purifying waste water of obtaining at last handling discharged ecological bed by rising pipe 16.

Composite ecological bed 1 top of the first step is provided with perforation water distributor 7, with drop mode water distribution, guarantees the oxygen level of water inlet; Main by filtering and organism and SS (suspended solids) are removed in biological degradation, adopt that soil removability is strong, the plant of well developed root system (as cyperus alternifolius etc.).The main effect of the first step composite ecological bed 1 is nitrated, denitrogenation and dephosphorization, in the bed body, make up good aerobic environment, it is nitrated that nitrifier is finished, the removal of phosphorus is mainly at packing layer 4, adopt large particle size fillers such as gravel or haydite to improve hydraulic performance, overcome the easy blockage problem of filler, filter by chemical precipitation and remove phosphorus, reasonably combined and layout filler.Open ventilation hole 10 in the composite ecological bed bottom of the first step, reinforcing filler contacts with oxygen, strengthens ecological bed nitration denitrification effect and denitrogenation dephosphorizing effect.

Perforation header 12 is established in the bottom of the first step composite ecological bed 1, is communicated with 8 drops of the composite ecological bed perforation water distributor in the second stage and enters the second stage composite ecological bed 2; Large particle size fillers such as composite ecological bed employing gravel in the second stage or haydite, it is dark to increase the pond, reduces to take up an area of, and the ecological bed main effect of this grade is denitrification, denitrogenation and dephosphorization.In the bed body, make up good anaerobic environment, make denitrifying bacteria finish denitrification; Plant absorbing is utilized and assimilation removal part nitrogen phosphorus; Optimize filler 5 combining and configuring, can select novel light filler (as haydite, plastics etc.) for use, filter by chemical precipitation and remove phosphorus.The water outlet of the second stage composite ecological bed 2 enters water collecting dike 11 through header 13, highlights the natural reaeration of sewage, and enters the third stage composite ecological bed 3 with perforation water distributor 9 in the drop mode.

The composite ecological bed drop water distribution of the third stage, the aerobic artificial ecology bed of employing shallow water, short residence time(SRT) makes up good aerobic environment by natural reaeration and plant for oxygen supply, to guarantee the stability of last water outlet.The main effect of third stage complex ecological bed system 3 is nitrated denitrogenation of further oxygen enrichment and dephosphorization.Guarantee sewage sufficient dissolved oxygen content in the bed body, further finish denitrogenation by nitrifier; The removal of phosphorus utilizes gravel iron or ceramics filling etc. mainly at packing layer 6, filters by chemical precipitation and removes phosphorus.

Claims

1. stairway composite ecological bed, it is characterized in that comprising adjacent stepped three grades composite ecological bed (1,2,3) and be located at water collecting dike (11) between second and third grade composite ecological bed (2), (3), filler (4,5,6) is set, filling surface plantation plant in each ecological bed body respectively; Ecological bed tops at different levels are respectively equipped with perforation water distributor (7,8,9), and the bottom is respectively equipped with perforation header (12,13,14);

Water inlet pipe (15) is communicated with the perforation water distributor (7) that the first step composite ecological bed (1) top is provided with, and former water is with drop mode water distribution; The perforation water distributor (8) that perforation header (12) is communicated with the second stage ecological bed (2) is established in the bottom of the first step ecological bed (1);

Header (13) is established in the bottom of the second stage composite ecological bed (2) makes water outlet enter water collecting dike (11), and the posticum of water collecting dike (11) is communicated with the perforation water distributor (9) of the third stage composite ecological bed (3) top;

The bottom of the third stage composite ecological bed (3) is established perforation header (14) and is communicated with rising pipe (16).

2. according to claim 1 stairway composite ecological bed, it is characterized in that described filler (4,5,6) adopts large particle-size and light-weight fillers such as gravel or haydite.

3. according to claim 1 stairway composite ecological bed, it is characterized in that opening ventilation hole (10) in the bottom of the first step ecological bed (1).

4. according to claim 1 stairway composite ecological bed, it is characterized in that the degree of depth of the third stage manually composite ecological bed (2), the first step composite ecological bed (1) and the second stage composite ecological bed (1) increases successively.