CN101838053B - Method for constructing artificial wetland through aged refuse for processing sewage - Google Patents

Method for constructing artificial wetland through aged refuse for processing sewage Download PDF

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CN101838053B
CN101838053B CN2009100479759A CN200910047975A CN101838053B CN 101838053 B CN101838053 B CN 101838053B CN 2009100479759 A CN2009100479759 A CN 2009100479759A CN 200910047975 A CN200910047975 A CN 200910047975A CN 101838053 B CN101838053 B CN 101838053B
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sewage
artificial swamp
mineralized waste
matrix
plant
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CN2009100479759A
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CN101838053A (en
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石磊
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宝山钢铁股份有限公司
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/10Biological treatment of water, waste water, or sewage

Abstract

The method provides a method for constructing artificial wetland through aged refuse for processing sewage, which includes the following steps: extracting, airing, sieving and sorting the aged refuse to obtain granular loose fine material; constructing an artificial wetland substrate bed by taking the aged refuge fine material as the base substrate together with other substrates; and growing hygrophytes on the bed. The method not only provides a new option for substrate for processing various types of sewage through wetlands and provides an approach for improving the additional value of the aged refuge.

Description

A kind of mineralized waste that adopts makes up the method that artificial swamp is disposed of sewage
Technical field
The present invention relates to the novel environment friendly technical field, be specifically related to a kind of purposes of mineralized waste.
Background technology
Artificial swamp is a kind of sewage disposal technology that grows up the seventies in 20th century; It is according to physics in the natural wetland ecosystem, chemistry, biological synergy, through the removal of filtering, absorption, heavy, IX altogether, plant absorbing and microbiological degradation are realized suspended substance, organism, nutritive salt, metals ion and pathogenic agent.It is strong that this technology has detergent power; Treatment effect is good; Advantages such as simple to operate, anti-shock loading is strong, investment and working cost only account for 10%~20% of traditional secondary biochemical treatment technology, therefore; At aspects such as administering pollution of area source, town domestic sewage, trade effluent, breeding wastewater good popularization value (seeing Chinese patent 200510011497.8,03150053.6 and 200610036318.0) is arranged.
Press the difference of current type; Artificial swamp can be divided into four types: (1) surface current wetland: sewage is in the filling surface cross flow; Operation scheme and natural wetland are the most approaching, and this wetland can not make full use of filler and root system of plant, are prone to grow mosquitos and flies; Can produce detrimentally affect to surrounding environment, and its processing efficiency is lower; (2) horizontal drowned flow wetland: sewage is seepage flow between the filler slit, can make full use of on filling surface and the root system of plant microbial film and other effects and dispose of sewage, and effluent quality is good.Because horizontal plane is at overlying soil or below the fine sand layer, sanitary condition is better, so extensively adopted; (3) vertical subsurface flow wetland: combined the characteristics of surface current wetland and horizontal drowned flow wetland, had higher decontamination effect improving, required height but build for organism and nitrogen; (4) tide current wetland: through alternative water inlet and air movement, the transfer rate and the consumption of oxygen improve greatly, but the lifting sewage treatment effect.
Artificial swamp is made up of several kinds of key elements such as matrix (claiming filler, filtrate again), aquatic (humidogene) plant, mikrobe.Present research shows, mikrobe is the main effect colony to organism, nitrogen and phosphorous nutrient Degradation and Transformation in artificial swamp; And choice of base is significant for the last effect of artificial marsh sewage treatment system: it both provided carrier and nutritive substance for aquatic plants growth, also for microbial growth the stable surface that depends on was provided; In addition; Matrix also can be removed pollutants in sewage through the approach (like absorption, absorption, filtration, IX, complex reaction etc.) of physics and chemistry, can be removed (seeing one Chinese patent application 200510030330.6,2,004 10066233.8 and Chinese patent 200720022699.7) through the deposition adsorption like the phosphorus above 80% in the artificial swamp.
Existing artificial swamp practice shows: the selection of matrix fill should meet the following conditions: (1) microbes biomass is big, exchange capacity of absorption is strong; (2) specific surface area is big, and porosity is high, and enough physical strengths are arranged; (3) do not contain the material that is harmful to HUMAN HEALTH and environment, chemicalstability is good; (4) head loss is little, and shape factor is good, high adsorption capacity; (5) life cycle is long; (6) low price, be easy to obtain.
At present; Use more matrix and mainly contain soil, yellow ground, gravel, zeolite, silica, slag, flyash, cinder, pebbles, haydite etc.; These matrix respectively have its limitation in practical applications: the PQ like soil is low, and permeability is bad, easy blocking; Nitrogen phosphorus adsorptive poweies such as yellow ground, gravel, pebbles are low, and microbes biomass is little; The zeolite adsorption ability is saturated easily; Slag and flyash alkalescence are higher, are unfavorable for the growth of wetland plant.Therefore, should carry out rational matrix selection and grating,, effectively remove all contaminations matter, avoid stopping up, improving the cycle of operation (Gray, 1993 simultaneously to give full play to the effect of matrix according to the water quality and the TA of concrete sewage; Johansson, 1999; Sakadevan, 2002; Deng Yanxi, 2003; Cui Lihua, 2003; Xue Yu, 2003 etc.).
Research shows, a kind of type material---" mineralized waste " can satisfy above-mentioned terms and conditions preferably.Mineralized waste is a city life garbage landfill closing product for many years.Along with the increase of quickening of urbanization process and domestic waste, make garbage loading embeading number, scale increase severely, and many landfill yard closing time limits with the passing of time.Research shows; Landfill yard closes the several years (more than southern area 8~10a; More than northern area 10~15a) after, landfill yard surface settlement amount very little (less than 5mm/a), spontaneous percolate of rubbish and gas vol seldom or not produce; The massfraction of biodegradable material drops to below 3% in the rubbish, and the mass concentration ρ of COD (COD) drops to below 25~50mg/L in the percolate.The refuse landfill of this moment can think and reach stabilization of state, and its inner cellulose, semicellulose class material are close to degraded fully, makes rubbish become a kind of particulate state soil material of similar soil ulmin, promptly so-called " mineralized waste " [CN 1789173A].Mineralized waste except that can obtaining valuables moneys such as glass, metal, rubber, plastics, also can obtain the mineralized waste fines (particle diameter≤40mm) of weight about 60% after exploitation airing screening.
Existing research shows; The mineralized waste fines of landfill 13 years and 9 years is similar with " sandy soil-inclined to one side sand " with " light soil-sandy soil " partially respectively; Unit weight is light, porous is loose, specific surface area is big, the n p k nutrition substances content is high, be rich in soil ulmin and mikrobe particular matter mutually to belong to one type; Wherein organic massfraction is 9%~11%; Cation exchange capacity reaches 0.068~0.070mol in the dried rubbish of every 100g, and saturated waterpower coefficient of permeability K s is 0.986cm/min and 1.232cm/min, total plate count 8 * 10 6~9 * 10 6Individual.Compare with conventional soil, the mineralized waste fines has the sand characteristic on physical structure and hydraulic performance, and on chemical property and microbiological property, shows the characteristics of rich soil, is very good biological sewage treatment matrix.Zhao of Tongji University utilizes the mineralized waste fines to make up bio-reaction bed by ability seminar; At waste water of livestock poultry (seeing one Chinese patent application 03116755.1 and 200510110225.3), landfill percolate (Chinese patent 00127298.5 and 200420080629.3; One Chinese patent application 200510112117.X and 200410017554.9), coking chemical waste water (one Chinese patent application 200510057371.4), sewage processing aspects such as (one Chinese patent application 200510110224.9), represented remarkable purifying property.
In view of good physics, chemistry and the microbiological property of mineralized waste, can be used as the artificial swamp choice of base.Through domestic and international patent of inquiry and document, do not find this type of relevant report as yet.
Summary of the invention
For solving above technical problem, the method that the object of the present invention is to provide a kind of mineralized waste fines to make up artificial swamp matrix and dispose of sewage.
Technical scheme of the present invention is that a kind of mineralized waste that adopts makes up the method that artificial swamp is disposed of sewage, and comprises the structure of artificial swamp matrix bed; The plantation of wetland plant and the processing of sewage; Wherein, said mineralized waste obtains the granular loose fines after exploitation, airing, screening, selection; Said mineralized waste fines is built into artificial swamp matrix bed as basic matrix and other matrix, plants wetland plant above that.
Mineralized waste is in long-term landfill process, goes through complex environment such as aerobic, hold concurrently oxygen and anaerobism and a kind of microbe population of forming gradually is huge, of a great variety, and the waterpower osmosis performance is good, heterogeneous porous natural biology system.Since percolate wash drop, immersion and domestication for a long time; Various physics, chemistry and biological action are constantly taking place between each component of mineralized waste; Be main with multistage degraded type bioprocess especially wherein, this makes it become the inorganic-organic complex ecosystem with special metabolic performance.Therefore; Mineralized waste is as a kind of Biomedia of superior performance; With respect to general soil; Have that biota and organized enzyme are abundant, microbes biomass is big, respiration is strong, characteristics such as microbial quotient and metabolism Shang Gao, can the efficient degradation organic pollutant, the impact of loading of opposing high density heavy metal and other hazardous and noxious substances.
Described mineralized waste is not the rubbish that reaches " inorganicization or mineralising " degree fully; But from the angle of utilizing of rubbish; With proximate stale garbages of the meaning of one's words such as stabilization rubbish, matured waste or old rubbish; It derive from landfill age more than 5~100a (more than northern area 10~100a), surface settlement amount less than percolate and the gas vol that 10mm/a, landfill unit self produce seldom or not produce, the massfraction of biodegradable material drops to below 5% in the rubbish, the mass concentration ρ (COD) of COD drops to below the 100mg/L in the percolate, is in the closing unit of stabilization of state basically.
Mineralized waste is used to bulk foreign material coarse fodders such as stone, wood to build the road, builds up fields or the place backfill after excavation airing, screening selection; With industrial raw material of the available work of valuables or fuel such as glass, metal, rubber, plastics; Less than 15mm with less than the fines material of 40mm,, store up subsequent use respectively particle diameter as the basic matrix of artificial swamp.
Be preferably, said other matrix are selected from zeolite, rubble, gravel, peat, cobble, haydite, slag, shale, cinder, grain slag and cobble.These matrix are selectivity matrix, constitute the artificial swamp hypothallus with basic matrix.
Be preferably, said artificial swamp matrix bed comprises coarse fodder pervious bed, mixed-matrix layer and mineralized waste hypothallus from bottom to top, said coarse fodder pervious bed height 10~40cm, and packing material size is 10~50mm; Said mixed-matrix layer thickness is 20~80cm, is made up of less than the filler that mineralized waste fines and the particle diameter of 40mm is 5~20mm particle diameter; Said mineralized waste hypothallus thickness is 10~30cm, is made up of the mineralized waste fines of particle diameter less than 15mm..
Wherein, the coarse fodder pervious bed has the effect of seepage flow, support, and the mixed-matrix layer is to enrich the concentrated area that microbial film forms and comes off, and the mineralized waste hypothallus is the zone of plant-growth.
Further, the hypothallus virtual height of said artificial swamp matrix bed is 30~150cm, and voidage is 20~40%.
Described artificial swamp comprises the combined type artificial wetland of free surface flow, horizontal drowned flow, vertical subsurface flow and combination thereof, wherein, can bring into play the advantage function of mineralized waste matrix with undercurrent type wetland.
Make up the method that artificial swamp is disposed of sewage according to employing mineralized waste of the present invention, the filler of said coarse fodder pervious bed is selected from one or more in cinder, grain slag, cobble, slag and the shale; The filler of said mixed-matrix layer is selected from one or more of rubble, gravel, haydite, peat, zeolite; The mixing proportion of mineralized waste fines is 0~50wt% in the said mixed-matrix layer.
Make up the method that artificial swamp is disposed of sewage according to employing mineralized waste of the present invention, said sewage comprises livestock and poultry liquid dung, industrial sewage, agricultural effluent, mining wastewater, landfill percolate, urban storm runoff, sewage and eutrophication river.
In described artificial swamp; Too high concentration of suspension possibly cause bed to stop up; Except that prolonging hydraulic detention time and adopting the method solution that refluxes, stop up for avoiding artificial swamp, keep system's direct motion; Need pretreatment units such as preposition grid, settling tank, acidulated pool, sand filtration, to remove the suspended substance of larger particles in the sewage.When sewage got into system, preferred SS (suspended solid) concentration was less than 1000mg/L.
Be preferably, said wetland plant comprises emergent, floating plant, submerged plant and hygrophyte; The plantation density of said wetland plant be 10~50 strains/square metre; Said emergent is selected from reed, cattail, Rush, calamus, Canna generalis Bailey, wilson iris, wild rice stem, FENGCHECAO, power flower, Caulis Miscanthis floriduli again; Said floating plant is selected from Herba Eichhorniae, Herba Eichhorniae, duckweed, jacinthe, lotus, water lily, Herba azollae imbricatae, water lettuce; Said submerged plant is selected from eel grass, black algae, waterweed, watermifoil; Said hygrophyte is selected from nutgrass flatsedge, dryland willow, metasequoia, Chi Shan.
In a preferred embodiment, the plantation density of said wetland plant be 20~36 strains/square metre; Said emergent is selected from reed, cattail, Rush, Canna generalis Bailey; Said floating plant is selected from Herba Eichhorniae, Herba Eichhorniae; Said submerged plant is selected from waterweed, watermifoil.
Constructed wetland plant can comprise all kinds of aquatic, hygrophytes.In artificial swamp was purified waste water process, the plant potential mainly acted on: nutritive substance, absorption and the enriching heavy metal and the hazardous and noxious substances that directly absorb attitude capable of using in the sewage; For mikrobe absorption growth provides bigger surface-area; Be root district aerobic microbiological delivering oxygen; Strengthen and keep the waterpower transmission performance of matrix.Vegetation type wherein, companion planting ratio and plantation density are decided according to wetland type and sewage characteristic.
Make up the method that artificial swamp is disposed of sewage according to employing mineralized waste of the present invention, the water distribution of the said artificial swamp-cycle of doing that falls is 1~3 day, the dried time ratio that wets is 1: 11~23, and hydraulic load is 0.1~0.6 meter/day; Water inlet is 4~10 times in the one-period, each 4~10 hours at interval.
Wherein water distribution-fall to doing the cycle that all index futures constructed wetland bed layers are accomplished a water distribution and the dry run that falls; Hydraulic load is the ability that the unit volume bed is disposed of sewage, and representes with the height of liquid level.
The hydraulic load of artificial swamp and operation scheme are according to the structural parameter of sewage characteristic, artificial swamp and combination thereof and decide.The preferred intermittently water distribution-dry run that falls to impel the oxygen transmission in the bed, recovers and keeps waterpower transmissibility, the organic biodegradability of bed and promote the carrying out of nitrification, is beneficial to the solid phosphorus effect that improves medium simultaneously.The total amount of disposing of sewage day can once be allocated into, but intakes 4~6 times in preferred day, each 4~6 hours at interval.
Sewage is removed sand grains and than behind the big suspended substance, is got into artificial swamp successively through pretreatment unit.Pollutent is when flowing through artificial swamp; The mikrobe that stromal surface and plant root have been grown a large amount of forms microbial film; Suspended substance is stopped by matrix and root system of plant and holds back in the sewage, and organism obtains degraded through biomembranous absorption and assimilation, and the nitrogen in the sewage, phosphorus obtain transforming through the biochemical action of mikrobe; Heavy metal, phosphorus rely on effects such as matrix absorption, plant absorbing and biomagnification to be able to remove, and bacterium and cause of disease etc. also is trapped within the system mostly.Especially the hardly degraded organic substance in the sewage can be able to Degradation and Transformation through the microflora of a great variety, enormous amount that mineralized waste provides, thereby has improved the purification efficiency of artificial swamp to hardly degraded organic substance sewage greatly.Sewage is through behind a series of physics, chemistry and the biochemical action, and wherein most pollutents are able to remove, water outlet back up to standard discharging.
Artificial swamp bed of the present invention when local obstruction or processing efficiency decline take place, can be taked following measure after prolonged application: the bed back flushing, and part is recovered the performance of wetland bed; Bed substrate is taken out, rebuild artificial swamp after tedding, sieving.When artificial swamp behind long-play, enrichment excessive hazardous and noxious substances such as heavy metal, hardly degraded organic substance, and when losing the value that activation utilizes again when too high (or reconstructed cost); Can mineralized waste and basic matrix be taken out; Give sanitary landfill, after the stabilization of (8-10a) after a while, natural degradation, the mineralized waste that these matrix fills can be used as a new round is used again in landfill yard; Move in circles like this, can finally realize the recycle of mineralized waste.
The invention has the beneficial effects as follows,
(1) the present invention can effectively handle all types of sewage; Like livestock and poultry liquid dung, industrial sewage, agricultural effluent, refuse tip percolate, urban storm runoff, sewage, eutrophication river etc., belong to Ecological Disposal technology, have that technology is simple, detergent power is strong; Attended operation is convenient; Advantages such as investment and running cost is low, construction convenience not only can effectively be carried out advanced treatment to sewage, also have environmental ecological benefit.
(2) the present invention has strengthened the wastewater treatment efficiency of conventional artificial swamp: according to the composition of artificial swamp; The present invention has strengthened wastewater treatment efficiency from matrix, mikrobe and three aspects of plant: 1. mineralized waste has merged advantages such as conventional fillers Filtration Adsorption property is strong, permeability good, physical strength is big, chemicalstability is good, grating is reasonable, low price, especially adsorb and the ability of phosphorus and heavy metal of transforming stronger; 2. mineralized waste itself contains the superpower department of microbiology of a large amount of different populations, degraded and conversion capability, and is much better than to the matrix that the Degradation and Transformation ability of pollutent in the waste water is more common, greatly improved the detergent power of artificial swamp; 3. the matrix nutrition of mineralized waste is abundant, the space is loose, and the reoxygenation ability is strong, more helps the growth of wetland plant and improves wetland interior oxidation state; In addition, mineralized waste itself has very big absorption exchange capacity, and is better to the absorption removal effect of heavy metal, phosphorus etc.
(3) the present invention makes up the mineralized waste of artificial swamp, takes from the household refuse landfill sites of stabilization.After simple excavation, screening,, in WWT, brought into play huge effect as the basic matrix of wetland bed.This high value added utilization of mineralized waste, that can suit measures to local conditions is applied in the WWT, has treatment of wastes with processes of wastes against one another effect.Simultaneously; After the mineralized waste exploitation, not only can sieve valuables money and 50~60% mineralized waste fineves such as obtaining 30~35% glass, metal, plastics, rubber, timber, original storage capacity more can soar; With the more fresh domestic refuse of landfill; No matter this measure is for the huge investment that economizes the land resource and rebuild landfill yard, still to solving the domestic refuse problem of outlet, all is of great importance.
(4) chocking-up degree of conventional artificial swamp has been alleviated in the present invention to a certain extent; Overcome the drawback that conventional artificial swamp is easy to stop up, work-ing life is short: along with the prolongation of working time; After particularly surpassing 1 year; Blocking problem appears in routine artificial swamp regular meeting, and tracing it to its cause is to become trickle clay particle after the soil granular fragmentation and under the effect of infiltration, constantly move down to form fine and close watertight layer gradually, thereby causes serious soil to stop up.And the mineralized waste quality among the present invention is loose, grain diameter and PQ are big, has the porosity of similar sandy soil, can alleviate the chocking-up degree of bed greatly, prolongs the life-span of artificial swamp.
(5) matrix fill such as mineralized waste of the present invention reusable edible after repeating landfill.
Description of drawings
Fig. 1 is for the mineralized waste exploitation and make up the process flow diagram that artificial swamp is disposed of sewage.
Embodiment
Specify in the face of implementation process of the present invention down:
Embodiment 1
Mineralized waste is taken from the landfill unit of existing 13 years of closing time; Percolate that landfill yard surface settlement amount 8mm/a, landfill unit self produce and gas vol are few, the massfraction of biodegradable material is 5% in the rubbish, the mass concentration ρ (COD) of COD is for below the 80mg/L in the percolate, and the closing unit is in stabilization of state basically.
Mineralized waste is used to bulk foreign material coarse fodders such as stone, wood to build the road, builds up fields or the place backfill after excavation airing, screening selection; With industrial raw material of the available work of valuables or fuel such as glass, metal, rubber, plastics; Less than 15mm with less than the fines material of 40mm,, store up subsequent use particle diameter as the basic matrix of artificial swamp.
Artificial swamp is a single-stage vertical subsurface flow wetland, long 200cm, wide 200cm; The bed virtual height is 100cm, and voidage is 30%, from bottom to top; Wherein coarse fodder pervious bed height is 20cm, by slag and cobble (both ratios are 1: the 1) formation of particle diameter 20~40mm; The mixed-matrix layer height is 60cm, is made up of less than the gravel that mineralized waste and the particle diameter of 40mm is 10~20mm particle diameter, and the mixing proportion of mineralized waste is 25%; The height of mineralized waste hypothallus is 20cm, and particle diameter is less than 15mm.
Pending sewage is taken from the cold rolling secondary effluent that contains behind chromium oily(waste)water treatment station chemistry-precipitate reduction of certain stainless steel enterprise, and hydraulic load is 0.1m/d, through big resistance " king " font perforated pipe evenly to artificial swamp surface water distribution.For preventing that suspended substance too high in the waste water from stopping up wetland, before water distribution, a preposition cover settling tank and a cover sand filtration system carry out pre-treatment to waste water, make water inlet SS concentration less than 100mg/L, and other water quality parameters and treatment effect are as shown in table 1.
Artificial swamp is planted reed and two kinds of emergents of cattail altogether, plantation density be 20 strains/square metre, wherein reed 12 strains, cattail 8 strains, two kind of plant are plantation at interval evenly.
The hydraulic load of artificial swamp is 0.1m/d, and the water distribution-cycle of doing that falls is 1d, intakes at regular time and quantity in one day 4 times, each 6 hours at interval, wetly does (time) than being 1: 11.
By shown in the table 1, sewage is after artificial swamp is handled, and effluent quality can satisfy the one-level requirement of " Iron And Steel Industry pollution discharge standard " (GB 13456-92).
Table 1 single-stage vertical subsurface flow wetland is handled the effect that stainless-steel cold-rolling contains the chromium oily(waste)water
Water-quality guideline pH COD (mg/L) Volatile phenol (mg/L) Prussiate (mg/L) Oils (mg/L) Sexavalent chrome (mg/L) Ammonia nitrogen (mg/L)
Water inlet 6.8-7.0 254-262 7.8-9.3 3.8-6.3 35.4-50.6 12.2-23.5 56.2-120.2
Water outlet 7.2-8.2 100-125 0.25-0.8 0.21-0.65 2.1-10.2 0.12-0.35 1.22-10.5
National standard 6-9 150 1.0 0.5 15 0.5 15
Embodiment 2
Mineralized waste is taken from the landfill unit of existing 5 years of closing time; Percolate that landfill yard surface settlement amount 10mm/a, landfill unit self produce and gas vol are few, in the rubbish massfraction of biodegradable material be 4%, mass concentration ρ (COD) 90~120mg/L of COD in the percolate, the closing unit is in stabilization of state basically.
Mineralized waste is used to bulk foreign material coarse fodders such as stone, wood to build the road, builds up fields or the place backfill after excavation airing, screening selection; With industrial raw material of the available work of valuables or fuel such as glass, metal, rubber, plastics; Less than 15mm with less than the fines material of 40mm,, store up subsequent use particle diameter as the basic matrix of artificial swamp.
The sewage of handling is the eutrophication river, and sewage at first passes through slightly, fine fack, carries out solid-liquid separation; Elimination bulk foreign material and algae; (1.5m * 1.5m * 2.0m) is after the precipitating action through 20~24h, again through a micropore grid to get into settling tank subsequently; Flow into artificial swamp, the concentration of sewage by suspended thing is controlled at below the 50mg/L.The water quality parameter of eutrophication river and the treatment effect of artificial swamp are as shown in table 2.
Artificial swamp is a two-stage horizontal drowned flow wetland, the long 15m of wetland, and wide 4m, one-level wet land filler floor height 80cm, voidage 30%, secondary wet land filler floor height 70cm, voidage 35%, the one-level water outlet is from flowing to secondary.
One-level wetland coarse fodder pervious bed height is 15cm, constitutes (both ratios are 1: 1) by cobble and the zeolite of particle diameter 20~40mm; The mixed-matrix layer height is 45cm, is made up of less than the rubble that mineralized waste and the particle diameter of 40mm is 10~20mm particle diameter, and the mixing proportion of mineralized waste is 50%; The height of mineralized waste hypothallus is 20cm, and particle diameter is less than 15mm.Plantation reed and Rush on it, plantation density be 36 strains/square metre, the plantation ratio is 1: 2, plants along the wetland uniform plane.
Secondary wetland coarse fodder pervious bed height is 15cm, is made up of the cobble of particle diameter 20~40mm; The mixed-matrix layer height is 40cm, is made up of less than the gravel that mineralized waste and the particle diameter of 40mm is 10~15mm particle diameter, and the mixing proportion of mineralized waste is 25%; The height of mineralized waste hypothallus is 15cm, and particle diameter is less than 15mm.Plantation Canna generalis Bailey and Rhizome of Grass leaf Sweelflag on it, plantation density be 30 strains/square metre, the plantation ratio is 1: 1, plants along the wetland uniform plane.
The eutrophy river carries out water distribution through the gravel bed of the front end through horizontal drowned flow artificial wet land, and hydraulic load is 0.6m/d, and the water distribution-cycle of doing that falls is 2d, in two days at regular time and quantity water inlet amount to 6 times, each 8 hours at interval, wet dried (time) was than being 1: 23.
Can know by table 2; The sewage process is the two-stage horizontal drowned flow wetland of basic matrix with mineralized waste; The water outlet dissolved oxygen obviously improves, and it is neutral that the pH value is, and all contaminations clearance is higher and stable; Each item monitoring index all reaches " urban sewage reutilization water for scenic environment use water quality " (GB 18921-2002) national standard, can utilize again.
Table 2 two-stage horizontal drowned flow artificial wet land is handled the effect of eutrophication river
Embodiment 3
Mineralized waste is taken from the landfill unit of existing 10 years of closing time; Percolate that landfill yard surface settlement amount 10mm/a, landfill unit self produce and gas vol are few, the massfraction of biodegradable material is 4% in the rubbish, the mass concentration ρ (COD) of COD is for below the 90mg/L in the percolate, and the closing unit is in stabilization of state basically.
Mineralized waste is used to bulk foreign material coarse fodders such as stone, wood to build the road, builds up fields or the place backfill after excavation airing, screening selection; With industrial raw material of the available work of valuables or fuel such as glass, metal, rubber, plastics; Less than 15mm with less than the fines material of 40mm,, store up subsequent use particle diameter as the basic matrix of artificial swamp.
The pig farm fecal sewage at first passes through grid, carries out solid-liquid separation, the solid-state ight soil of elimination bulk (solid-state ight soil is made compost); Filtered sewage inflow settling tank (5.5m * 3.5m * 3.0m), after the precipitating action through 20~24h, through a fine screen mesh; Flow into acidulated pool (radius 1.5m; Dark 3.0m), through getting into artificial swamp after 2~3d fermentative action, this moment, the concentration of waste water suspension was reduced to below the 100mg/L in acidulated pool.The treatment effect of the water quality parameter of pig farm fecal sewage and multistage composite artificial swamp is as shown in table 3.
Artificial swamp is the multistage composite artificial swamp, is made up of a downstream wetland, up stream wetland, horizontal drowned flow wetland and surface current wetland successively, and sewage flows automatically and mistake successively.The dimensional parameters of each wetland, matrix are formed and vegetation type is distinguished as follows:
The long 10m of downstream wetland, wide 5m, the bed virtual height is 80cm, and voidage is 35%, and from bottom to top, wherein coarse fodder pervious bed height is 20cm, is made up of the gravel of particle diameter 20~40mm; The mixed-matrix layer height is 50cm, is made up of less than the haydite that mineralized waste and the particle diameter of 40mm is 10~20mm particle diameter, and the mixing proportion of mineralized waste is 50%; The height of mineralized waste hypothallus is 10cm, and particle diameter is less than 15mm.Artificial swamp is planted Rush and two kinds of emergents of Canna generalis Bailey altogether, plantation density be 20 strains/square metre, both ratios are 1: 1, at interval evenly plantation.
The hypothallus of up stream wetland makes the water outlet of downstream wetland can flow automatically to the up stream wetland than the low 15cm of downstream wetland, is provided with partition wall in the middle of two wetlands, and the bottom is communicated with via the gravel pervious bed.The up stream wetland except that the mixed-matrix layer than the low 15cm of downstream wetland, all the other dimensional parameters and matrix are formed identical.Artificial swamp is planted Rhizome of Grass leaf Sweelflag and two kinds of emergents of cattail altogether, plantation density be 26 strains/square metre, both ratios are 1: 1, at interval evenly plantation.
The long 20m of horizontal drowned flow wetland, wide 5m, the bed virtual height is 30cm; Voidage is 40%, does not contain coarse fodder pervious bed and mineralized waste hypothallus, has only highly to be the mixed-matrix layer of 30cm; Wherein particle diameter is 50% less than the mixing proportion of the mineralized waste of 40mm, and particle diameter is that the rubble of 10~20mm and the ratio of shale respectively are 25%, and artificial swamp is only planted reed; The plantation density be 24 strains/square metre, plant along the wetland uniform plane.
The long 40m of surface current wetland, wide 8m, wetland hypothallus thickness 40cm all is made up of less than the mineralized waste of 40mm particle diameter, and the water surface of wetland is higher than hypothallus surface 0.3m, is similar to the oxygen pool of holding concurrently.First three of artificial swamp/place, a waters is the emergent reed; Plantation density be 20 strains/square metre, 2/3rds waters, back are Herba Eichhorniae and Herba Eichhorniae, approximate 1: 1 of both ratios; Putting area in a suitable place to breed is 50~60% of water surface area; Run duration is every to be salvaged once at a distance from two weeks, salvages weekly once at animated period, as the pig farm feed.
Evenly to descending person who lives in exile worker's wetland surface water distribution, hydraulic load is 0.3m/d to piggery wastewater through big resistance " king " font perforated pipe, and the water distribution-cycle of doing that falls is 3d, in three days at regular time and quantity water inlet amount to 9 times, each 8 hours at interval, wet dried (time) was than being 1: 23.
Can know by table 3; Pig farm excrement and urine water process is the multistage composite artificial swamp of basic matrix with mineralized waste; The water outlet dissolved oxygen obviously improves; It is neutral that the pH value is, and all contaminations clearance is higher and stable, and each item monitoring index all reaches " livestock and poultry breeding industry pollutant emission standard " (the GB 18596-2001) that implemented on January 1st, 2003.
Table 3 multistage composite artificial swamp is handled the effect of pig farm excrement and urine water
The present invention not only handles multiclass sewage for artificial swamp provides new matrix to select; Also the high value added utilization approach is provided for mineralized waste; Make landfill yard storage capacity be able to increase greatly, thereby prolonged the work-ing life of landfill yard, practiced thrift the required fund of place dilatation.

Claims (8)

1. one kind is adopted mineralized waste to make up the method that artificial swamp is disposed of sewage; The structure that comprises artificial swamp matrix bed, the plantation of wetland plant and the processing of sewage is characterized in that; Said mineralized waste is after exploitation, airing, screening, selection; Obtain the granular loose fines, said mineralized waste fines is built into artificial swamp matrix bed as basic matrix and other matrix, plant wetland plant above that;
Said artificial swamp matrix bed comprises coarse fodder pervious bed, mixed-matrix layer and mineralized waste hypothallus from bottom to top, said coarse fodder pervious bed height 10~40cm, and packing material size is 10~50mm; Said mixed-matrix layer thickness is 20~80cm, is made up of less than the filler that mineralized waste fines and the particle diameter of 40mm is 5~20mm particle diameter; Said mineralized waste hypothallus thickness is 10~30cm, is made up of the mineralized waste fines of particle diameter less than 15mm.
2. employing mineralized waste according to claim 1 makes up the method that artificial swamp is disposed of sewage, and it is characterized in that said other matrix are selected from zeolite, rubble, gravel, peat, cobble, haydite, slag, shale, cinder, grain slag and cobble.
3. employing mineralized waste according to claim 1 makes up the method that artificial swamp is disposed of sewage, and it is characterized in that the hypothallus virtual height of said artificial swamp matrix bed is 30~150cm, and voidage is 20~40%.
4. employing mineralized waste according to claim 1 makes up the method that artificial swamp is disposed of sewage, and it is characterized in that the filler of said coarse fodder pervious bed is selected from one or more in cinder, grain slag, cobble, slag and the shale; The filler of said mixed-matrix layer is selected from one or more of rubble, gravel, haydite, peat, zeolite; The mixing proportion of mineralized waste fines is 0~50wt% in the said mixed-matrix layer.
5. employing mineralized waste according to claim 1 makes up the method that artificial swamp is disposed of sewage; It is characterized in that said sewage comprises livestock and poultry liquid dung, industrial sewage, agricultural effluent, mining wastewater, landfill percolate, urban storm runoff, sewage and eutrophication river.
6. employing mineralized waste according to claim 1 makes up the method that artificial swamp is disposed of sewage, and it is characterized in that said wetland plant comprises emergent, floating plant, submerged plant and hygrophyte; The plantation density of said wetland plant be 10~50 strains/square metre; Said emergent is selected from reed, cattail, Rush, calamus, Canna generalis Bailey, wilson iris, wild rice stem, FENGCHECAO, power flower, Caulis Miscanthis floriduli again; Said floating plant is selected from Herba Eichhorniae, Herba Eichhorniae, duckweed, jacinthe, lotus, water lily, Herba azollae imbricatae, water lettuce; Said submerged plant is selected from eel grass, black algae, waterweed, watermifoil; Said hygrophyte is selected from nutgrass flatsedge, dryland willow, metasequoia, Chi Shan.
7. employing mineralized waste according to claim 6 makes up the method that artificial swamp is disposed of sewage, it is characterized in that, the plantation density of said wetland plant be 20~36 strains/square metre; Said emergent is selected from reed, cattail, Rush, Canna generalis Bailey; Said floating plant is selected from Herba Eichhorniae, Herba Eichhorniae; Said submerged plant is selected from waterweed, watermifoil.
8. employing mineralized waste according to claim 1 makes up the method that artificial swamp is disposed of sewage, and it is characterized in that, the water distribution of the said artificial swamp-cycle of doing that falls is 1~3 day, the dried time ratio that wets is 1: 11~23, and hydraulic load is 0.1~0.6 meter/day; Water inlet is 4~10 times in the one-period, each 4~10 hours at interval.
CN2009100479759A 2009-03-20 2009-03-20 Method for constructing artificial wetland through aged refuse for processing sewage CN101838053B (en)

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