CN203411432U

CN203411432U - System for treating municipal waste water by using sea water

Info

Publication number: CN203411432U
Application number: CN201320346192.2U
Authority: CN
Inventors: 袁银男; 倪红军; 石健
Original assignee: Nantong University
Current assignee: Nantong University
Priority date: 2013-06-17
Filing date: 2013-06-17
Publication date: 2014-01-29
Anticipated expiration: 2023-06-17

Abstract

The utility model relates to a waste water treatment system by mixing sea water and municipal waste water. The system comprises a mixing pool, a rinsing sand pool, a water collecting pool and a piece of wet land; the rinsing sand pool, the water collecting pool and the wet land are connected with one another sequentially by pipelines; water in the mixing pool is pumped into the rinsing sand pool through a water pump; a pool body of the rinsing sand pool is formed by surrounding stacked reeds, crop stems or sandbags; catch drains are arranged at the periphery of the rinsing sand pool and used for collecting outlet water to be conveyed into the water collecting pool. The system can effectively improve the effluent quality, and can provides a great amount of low-cost fillers for land reclamation through surrounding and filling; the newly formed land can share the cost for treating the waste water.

Description

A kind of system of utilizing brine disposal municipal wastewater

Technical field

The utility model relates to municipal wastewater treatment technology, particularly relates to a kind of system of utilizing seawater and municipal wastewater combination treatment waste water.

Background technology

China is in the fast economic growth phase, national urban wastewater treatment firm year in 2010 amount of disposing of sewage reach 31,800,000,000 tons, " 15 " end of term increases by 114%.In view of this to prevent and treat task also quite heavy for contaminated wastewater.If waste water is not carried out to the effective comprehensive regulation, will cause serious environmental pollution and ecological damage, harm people are healthy, hinder economic further Sustainable development.In China's sanitary sewage disposal, the phenomenon of the light mud of heavy water is very general, and how the mud of the disposal municipal sewage plant of safety economy is the environmental problem of domestic and international facing.According to estimates, the annual municipal sludge turnout of China surpasses 4,000,000 t (in dewatered sludge), along with universal, the raising of processing rate and the in-depth of degree for the treatment of of sewage treatment facility, the generation of the byproduct of sewage disposal " mud " is also increasing, and quantity is very surprising.If sludge treatment is improper, very easily cause secondary pollution.The most frequently used burning and landfill has relative merits separately at present, sludge incineration is that main drawback is expensive and issuable pollution (waste gas, noise, vibrations, heat and radiation), mud sanitary landfill needs to take a large amount of soils, expends considerable landfill expense, this makes the proportion of Sludge landfill disposal in recent years more and more less, and will be subject to more and more stricter restriction.China's sludge treatment is disposed and is faced with stern challenge.

Utility model content

The problem existing in order to solve prior art, the utility model provides a kind for the treatment of process of municipal wastewater, the method is to utilize seawater fully to mix with waste water, not only can make the colloid in waste water take off surely, save a large amount of water treatment agents completely, enclose the soil be coated with forming simultaneously and can also solve the problems such as the land resources becoming increasingly conspicuous is in short supply, to realizing the good and fast development of social economy, there is great reality and strategic importance.

The technical scheme that the utility model adopts is: a kind of system of brine disposal municipal wastewater, consists of mixing pit, scouring basin, water collecting basin and wetland; Between scouring basin, water collecting basin and wetland, by pipeline, be connected successively, the water in mixing pit pumps into scouring basin by water pump; The pond body of described scouring basin is that reed, farm crop bar or sandbag heap enclose and form, and surrounding is established the irrigation canals and ditches that catchment, and collects water outlet to water collecting basin.

In municipal wastewater, fully mix in mixing pit with seawater and silt mixture, in waste water, colloidal solid is tentatively de-steady, and mixed water body is pumped into scouring basin, further de-steady in scouring basin, obtains colloid flco; In scouring basin, complete quiet heavy, the dehydration of de-steady colloidal solid, solid-liquid separation, at the bottom of quiet heavy colloid and sediment deposition thing are deposited on scouring basin, can, as the natural filter bed and adsorption bed of post precipitation, guarantee effluent quality qualified discharge; In scouring basin, separated water outlet can directly be arranged sea after by marsh and biological wetland.

The step of processing is as follows:

(1) in municipal wastewater, add seawater and silt mixture, fully, after hybrid reaction, in waste water, colloidal solid is de-steady, obtains colloid flco;

(2) by quiet heavy, the dehydration of the de-steady colloidal solid of step (1), solid-liquid separation;

(3) water outlet after separation in step (2) is passed through to marsh and biological wetland;

(4) sea is directly arranged in the water outlet in step (3).

To the ratio value that adds seawater in municipal wastewater, with ZETA current potential in water body after guaranteeing to mix, between-10mV--+10mV, be advisable;

In step (1), indication seawater is the mixture of seawater and silt, and its liquid-solid ratio is advisable with 1:1-10:1.

Seawater in step (1) fully mixes rear quiet heavy colloid and the sediment deposition thing in earlier stage of passing through with waste water, and the colloid in early stage and sediment deposition thing can, as the natural filter bed and adsorption bed of post precipitation, guarantee effluent quality qualified discharge;

The sediment deposition thing that seawater in step (1) and waste water fully mix rear generation can be made as blowing sand the filler on ground;

In step (1), seawater and silt mixture can come from the silt of improved channels and seabed desilting;

Quiet heavy, the dehydration of de-steady colloidal solid in step (2), can suitably add water treatment agent for being conducive to deep thing reinforcing in solid-liquid separation, as: polyacrylamide, or other any medicament that increases flco fractal dimension.

In marsh and biological wetland, plant plant in step (3) and comprise normal temperature kind and evergreen kind, cold-resistant kind, cold-resistant kind and Salt And Alkali Tolerance crop (towards herding barnyard grass, sweet sorghum, Sunflower Receptacle, paddy barnyard grass, Salicornia Bigelovii Torr., tomato, Lengxiang rose, Chinese tamarisk algae, the red autumnal leaves poplar Radix Astragali, Japanese Honeysuckle, kendir etc.).

Utilize the utility model to process waste water, saved a large amount of water treatment agents; For rationally disposing the mud producing in water treatment procedure, effective means are provided; The sludge settling thing producing in treating processes can serve as filter bed and the adsorption bed in subsequent processes, has improved the water quality of processing water outlet; The mud producing can provide a large amount of low-cost fillers for enclosing painting epeirogenetic; The new soil forming has shakeout the cost of sewage disposal.

Accompanying drawing explanation

Fig. 1 is that the utility model forms schematic diagram.

Embodiment

Embodiment:

Flow process, as Fig. 1, is set up and is processed mixing pit, scouring basin, water collecting basin and wetland, carries out sewage disposal, and step is as follows:

Mixing pit: municipal wastewater is introduced to mixing pit, add therein the mixture of seawater and silt, the value that adds seawater is advisable between-10mV--+10mV with ZETA current potential in water body after guaranteeing to mix; The mixture of seawater and silt, its liquid-solid ratio is advisable with 1:1-10:1; The seawater that is mixed with silt here mixes with municipal wastewater, after mixing and pump into scouring basin; The design residence time is less than 30 minutes;

Scouring basin: pond body is that the bings such as reed, farm crop bar, sandbag enclose and form, guarantees evenly water outlet of surrounding; Surrounding is established the irrigation canals and ditches that catchment, and collects water outlet to water collecting basin, with PE pipe, connects scouring basin and water collecting basin.

Water collecting basin: the design residence time is less than 12 hours, and size, depending on the concrete water yield, can be adjusted; And connect water collecting basin and wetland with PE pipe.Wetland: design area 300--500m2, hydraulic load 0.25m3/m2.d.Can be combined by the identical wetland of one or several area, size is looked specifically and voluntarily and is adjusted; Wetland Substrate filler (brickbat, haydite, slag, gravel, rough sand), specific form is: utilize local resources, brickbat or gravel.: stromal thickness is a 0.8m, divides three layers, upper strata 0.35m(1～2cm); Middle level 0.25m(3～4cm); 0.2m(5～the 6cm of lower floor); Or can be designed as: stromal thickness is 0.7m, upper strata 0.3m(1～2cm); Middle level 0.2m(3～4cm); 0.2m(5～the 6cm of lower floor), screening detergent power is strong, resistance is similar, and the less plant of increment reduces in management especially to the many difficulties in plant materials aftertreatment.Generally should select the plant existing in the natural wetland in locality or this area.Very this vegetation type of pasture and water can select reed, Canna generalis Bailey, Caulis Miscanthis floriduli, again power flower, Caulis Miscanthis floriduli, yellow flag, parasol is careless, hay is careless and cattail etc., wetland soil can be selected as oriented land-floras of root growth such as Canna generalis Bailey, reed, Rush, the parasol bamboo emperor reed seeds of Job's tears, can also select Salt And Alkali Tolerance crop, as towards herding barnyard grass, sweet sorghum, Sunflower Receptacle, paddy barnyard grass, Salicornia Bigelovii Torr., tomato, Lengxiang rose, Chinese tamarisk algae, the red autumnal leaves poplar Radix Astragali, Japanese Honeysuckle, kendir etc.

In the utility model, water inlet and the parameter of water outlet be as table 1,

Table 1. water inlet and water outlet parameter

The data of table 1 show that water quality after treatment meets emission standard.

The plant of gathering on the bed mud in water collecting basin, wetland returns to scouring basin after can be made into compost again, as the settler of subsequent disposal.

Claims

1. a system of utilizing brine disposal municipal wastewater, is characterized in that, mixing pit, scouring basin, water collecting basin and wetland, consists of; Between scouring basin, water collecting basin and wetland, by pipeline, be connected successively, the water in mixing pit pumps into scouring basin by water pump; The pond body of described scouring basin is that reed, farm crop bar or sandbag heap enclose and form, and surrounding is established the irrigation canals and ditches that catchment, and collects water outlet to water collecting basin.