CN1333190A

CN1333190A - Sewage treatment method and equipment thereof

Info

Publication number: CN1333190A
Application number: CN00114693A
Authority: CN
Inventors: 吴振斌; 雷志洪
Original assignee: Shenzhen City Institute Of Environmental Science Shenzhen Biyuan Environment Protection Technology Co ltd; Institute of Hydrobiology of CAS
Current assignee: Shenzhen City Institute Of Environmental Science Shenzhen Biyuan Environment Protection Technology Co ltd; Institute of Hydrobiology of CAS
Priority date: 2000-07-11
Filing date: 2000-07-11
Publication date: 2002-01-30
Anticipated expiration: 2020-07-11
Also published as: CN1163427C

Abstract

The present invention discloses a sewage treatment method and its installation. Said method incldues the following steps: firstly, making sewage pass through settling pond to removing hard grain and suspension; then feeding the sewage into flowing bed in which the gravels are filled and the aquatic plant and hydrophyte are planted so as to further reduce suspension in sewage and reduce COD of sewage; feeding the sewage into downward flowing pond-upward-flowing pond, in the artificial wet land the gravels and fine sand are filled and aquatic plant and hygrophyte are planted to degrade COD in the sewage, remove nitrogen and phosphorus, remove heavy metal and special pollutants of exogenous biological activity substance and phycotoxin, etc., the feeding it into water-quality modification pond in which the fine sand layer is filled and hydatophyte is planted to modifying water quality, finally discharging sewage meeting requirements for discharge and recovering it to reuse.

Description

A kind of sewage water treatment method and device

The present invention relates to field of environment engineering, the device that more specifically relates to a kind of method of sewage disposal and realize this method.

The ordinary method of urban sewage purification is a secondary biochemical treatment, after physical treatments such as precipitation, enters the aeration tank and handles through active sludge biological, discharges behind the redeposition.This treatment effect is fine, in the water aerobic substance particularly biochemical oxygen demand reduce significantly, but build, move, keep three the expense too high.Need to build the pond, facilities such as pipe network, pumping plant, be used to during operation to promote with the power load of aeration etc. bigger, the maintenance of certain hour domestic demand, maintenance, standing charges are higher, and the prerequisite of its operation must have perfect sewage collecting pipe network.By contrast, development " three is low " sewage disposal technology that initial cost is low, running cost is low and maintenance technology is low is good the replenishing that big city sewage is focused on, and is particluarly suitable for the intact perfect inadequately middle samll cities and towns of sewage network and uses.Europe and North America etc. utilize the wet land sewage purification function, the effect of comprehensive plant, microorganism and medium is disposed of sewage, this method has construction, running cost is low, advantages such as simple and convenient management, but be only limited to the reed bed system of single flat flow or upright streaming, it denitrogenates the poor effect of dephosphorization, and hydraulic load and pollution load are lower.

The purpose of this invention is to provide a kind of sewage water treatment method, easy to implement the method, easy and simple to handle, can impel the water reuse; Realize the ground water correction, protection drinking water source water body; Solving the problem that the medium and small town sewage of dispersive is handled, also is good the replenishing that big city sewage is focused on.

Another object of the present invention provides the device of this sewage water treatment method.

In order to achieve the above object, the present invention adopts following technical measures: adopt the bioprocess technology treatment technology, main processing unit is a vertical current constructed wetland, and its sum of series scale is decided on water quality.Before vertical current constructed wetland, look the sewage quality situation and establish the settling tank pre-treatment or add the pulling flow type gravel bed system, after vertical current constructed wetland, look water quality and establish and modify the pool or in line.Realize water correction and reuse.This method comprises the following steps:

(1) sewage is removed thick particle, suspended substance through settling tank;

(2) enter the plug-flow bed, reduce suspended substance in the sewage, prevent alluvial; Reduce COD of sewage, alleviate subsequent disposal unit pollution load;

(3) enter down flow artificial wet field, COD in the degradation water, denitrogenate dephosphorization, and remove specific pollutants such as heavy metal, exogenous bioactive substance, algae toxin;

(4) enter the up stream artificial swamp, the water pollutant of further degrading;

(5) water of Chu Liing enters water quality and modifies the pool, and water outlet is modified;

(6) water outlet discharging or reuse;

Wherein the current in plug-flow bed, downstream and the up stream artificial swamp are undercurrent, intake to the gap or hocket.

Be used to realize that the device of method of the present invention comprises:

A settling tank;

A plug-flow bed is filled with gravel or rubble in the plug-flow bed, implant aquatic, hygrophyte;

A downstream pond is filled with gravel or rubble at the bottom of the pond, be fine sand or rubble on gravel top, and water distributor and collection tube are housed, and implants aquatic, hygrophyte;

A up stream pond is filled with gravel or rubble at the bottom of the pond, be fine sand or rubble on gravel top, and water distributor and collection tube are housed, and implants aquatic, hygrophyte;

A water quality is modified the pool, and bottom, the pool is filled with the shallow-layer fine sand, implants submerged plant.

The present invention compared with prior art, have the following advantages and effect: good purification, the advanced treatment that can be used for sewage, exogenous organic matter, oestrogenic hormon, hereditary poisonous substance and specific pollutants such as algae toxin, heavy metal there is removal effect preferably, realize water correction and reuse, impel the aquatic attitude of degenerating to recover, protection drinking water source water body; Construction costs is low, is the 1/3-2/3 of conventional secondary water processing establishment construction investment; Working cost is low, is the 1/5-1/2 of conventional secondary water processing establishment construction investment or lower; Have higher pollution load and hydraulic load ability, and be easy to regulate and control, easy and simple to handle, easy construction has the effect of beautifying view, preserves the ecological environment.

Fig. 1 is a kind of waste disposal plant structural representation.

Below in conjunction with accompanying drawing the present invention is described in further detail:

According to Fig. 1 as can be known, sewage at first passes through settling tank 1, and settling tank 1 is made for water-proof material or brick mix, and removes thick particle, suspended substance; Next is to enter plug-flow bed 2, plug-flow bed 2 is made the pond that obliquity is 0.5-5% for water-proof material or brick mix, in fill out coarse gravel 16 or rubble, particle diameter 10-50mm grain, implant aquatic, hygrophyte such as reed 6 or cattail, wild rice, Fischer grass, reed, Job's tears, nutgrass flatsedge, the cyperus root of Dahurian angelica, rhizoma scirpi, Rush, Canna generalis Bailey, metasequoia, Chi Shan etc., the horizontal water distributor 10 with holes in feed-water end surface, the horizontal collection tube 11 with holes in water side bottom and on draw, caliber is 70-150mm, current are undercurrent type.This is handled and reduces suspended substance in the water, prevents alluvial, reduces COD of sewage, reduces the unitary pollution load of subsequent disposal; The 3rd enters downstream pond 3, make for water-proof material or brick mix in downstream pond 3, gravel 17 or rubble are filled out in the bottom, particle diameter 10-50mm, up be fine sand 18 or rubble, particle diameter 0-20mm, 3 implantation are aquatic in the downstream pond, hygrophyte such as reed 7 or cattail, wild rice, the Fischer grass, reed, Job's tears, nutgrass flatsedge, the cyperus root of Dahurian angelica, rhizoma scirpi, Rush, beautiful from any of several broadleaf plants, metasequoia, Chi Shan etc., there is water distributor with holes 12 on 3 surfaces, downstream pond, the bottom is " H " collection tube 13 with holes, caliber 70-150mm, and the pipe intensity is looked the wetland scale and is increased and decreased, current are undercurrent type, intake to be intermittence or alternative expression water intake mode; The 4th enters up stream pond 4, make for water-proof material or brick mix in up stream pond 4, gravel 17 or rubble are filled out in the bottom, particle diameter 10-50m, up be fine sand 18 or rubble, particle diameter 0-20mm, 4 implantation are aquatic in the up stream pond, hygrophyte such as calamus 8 or White flag, Scirpus tabernaemontani, arrowhead, water harmony dish, Alternanthera philoxeroides, Chinese celery, water pepper, sedge etc., 4 bottoms, up stream pond and surface have " H " water distributor 14 with holes and collection tube 15 respectively, caliber 70-150mm, the pipe intensity is looked the wetland scale and is increased and decreased, and current are undercurrent type, intake to be intermittence or alternative expression water intake mode.Descending-up stream artificial swamp is the major function unit, COD in the degradation water, denitrogenates dephosphorization, and removes specific pollutants such as heavy metal, exogenous bioactive substance, algae toxin; The 5th is to enter water quality to modify the pool 5, water-proof material or brick mix makes the pond, modify 5 bottoms, the pool in water quality and insert shallow-layer fine sand 19, implant submerged plant eel grass 9 or Herba potamogetonis distincti, hornwort, big najas marina, water caltrop, Huang Sicao or waterweed etc., water outlet is modified, and last water outlet reaches emission request or reuse.

Claims

1, a kind of sewage water treatment method, this method comprises the following steps:

A, sewage are removed thick particle, suspended substance through settling tank;

B, enter the plug-flow bed, reduce suspended substance, COD in the sewage;

C, enter down flow artificial wet field, COD in the degradation water, denitrogenate dephosphorization, remove heavy metal, exogenous active substance, algae endotoxin contamination thing;

D, enter the up stream artificial swamp, further remove water pollutant;

E, enter water quality and modify the pool, water outlet is modified;

2, a kind of device that is used to realize the method for claim 1, this device comprises:

A settling tank (1);

A plug-flow bed (2) is filled out gravel (16) or rubble in the plug-flow bed (2), water distributor (10) and collection tube (11) are implanted aquatic, hygrophyte;

Gravel (17) or rubble are filled out in a downstream pond (3), bottom, up are fine sand (18) or rubble, and there is water distributor (12) on surface, downstream pond (3), and the bottom is " H " collection tube with holes (13), implant aquatic, hygrophyte in downstream pond (3);

Coarse gravel (17) or rubble are filled out in a up stream pond (4), bottom, up are fine sand (18) or rubble, and up stream pond (4) bottom and surface have water distributor (14) and collection tube (15) respectively, and up stream pond (4) implant aquatic, hygrophyte;

A water quality is modified the pool (5), and water quality is modified bottom, the pool (5) and filled out people's shallow-layer fine sand (19), implants submerged plant.