CN110092543A - A kind of algae pool-environmentally friendly processing method of artificial swamp-ecological pond of urban wastewater treatment firm tail water - Google Patents

A kind of algae pool-environmentally friendly processing method of artificial swamp-ecological pond of urban wastewater treatment firm tail water Download PDF

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Publication number
CN110092543A
CN110092543A CN201910396853.4A CN201910396853A CN110092543A CN 110092543 A CN110092543 A CN 110092543A CN 201910396853 A CN201910396853 A CN 201910396853A CN 110092543 A CN110092543 A CN 110092543A
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China
Prior art keywords
algae
artificial swamp
water
pool
ecological pond
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CN201910396853.4A
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Chinese (zh)
Inventor
姜德刚
王育来
徐金燕
林雪萍
黄博
张琳婷
刘贞文
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Islands Research Center Ministry Of Natural Resources
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Islands Research Center Ministry Of Natural Resources
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Priority to CN201910396853.4A priority Critical patent/CN110092543A/en
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/32Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/32Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
    • C02F3/322Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae use of algae
    • C02F3/325Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae use of algae as symbiotic combination of algae and bacteria
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/30Organic compounds
    • C02F2101/38Organic compounds containing nitrogen

Abstract

The invention belongs to protection of natural resources and environment technical fields, in particular to the algae pool-environmentally friendly processing method of artificial swamp-ecological pond of a kind of urban wastewater treatment firm tail water, substantially by urban wastewater treatment firm tail water followed by the algae pool, artificial swamp and ecological pond, wherein, biology in the algae pool includes the bacterium that the available form of algae can be directly converted into using the algae of the hydrophilic component of dissolved organic matter in tail water and by the hydrophobic components of dissolved organic matter in tail water, artificial swamp includes pond body, matrix is filled in pond body, also kind is implanted with water plant in wetland, it is built in ecological pond biological floating bed.

Description

A kind of algae pool-artificial swamp-ecological pond environment of urban wastewater treatment firm tail water Friendly processing method
Technical field
The invention belongs to protection of natural resources and environment technical field, in particular to a kind of algae of urban wastewater treatment firm tail water The pool-environmentally friendly the processing method of artificial swamp-ecological pond.
Background technique
With the development and improvement of living standard of urbanization, town domestic sewage discharge amount is significantly increased.In order to cut down Sanitary sewage discharges the influence to the water quality, Ecology of receiving water body, and China's town domestic sewage handling rate is also in that power exponent increases Long trend ends in December, 2017, and the whole nation is completed 5707 sewage treatment plants, and daily handling ability reaches 1.80 × 109m3/d。 Due to metastable water quality and water, urban wastewater treatment firm tail water has become a kind of important moisturizing of urban rivers and lakes environment Mode.However, even if urban wastewater treatment firm tail water implements maximum emission standard (level-one A standard), relative to surface water environment Quality standard limit value is still excessively high, can still generate certain influence to receiving water body.
It is influenced to mitigate sewage plant Tail water reuse to the environment that receiving water body generates, many countries, the world, regional waste-water Treatment plant has carried out " proposing mark transformation " using intensive treatment technology, performs more stringent pollutant emission standard.Although dirty Inorganic component in water treatment plant's water inlet is effectively removed during intensive treatment, but organic component then becomes sewage The Main Morphology of bioactive elemements in plant tail water is handled, if dissolved organic nitrogen accounts for the 40%~85% of total nitrogen, dissolved organic phosphorus is accounted for To the 26%~81% of total phosphorus.Meanwhile sewage plant tail water also contains some poisonous and harmful substances, such as heavy metal, difficult to degrade organic Pollutant.These chemical discharges certainly will will affect its water quality, Ecology effect to receiving water body.
Municipal sewage plant's tail water is a kind of water resource not utilized rationally.In consideration of it, China is environmental-friendly Worker has carried out urban wastewater treatment firm Tailwater Depth Processing Technology Research, in the reuse or moisturizing of urban wastewater treatment tail water Aspect has obtained breakthrough.Currently in the mainly active charcoal absorption, film of urban wastewater treatment firm Tailwater Depth processing technique The technologies such as separation, advanced oxidation, artificial swamp, and single technology combination has been carried out based on above-mentioned technology, as resin adsorption-is smelly Oxygen catalysis oxidation, biological aerated filter-artificial swamp etc. combine new technology.
However, process or group technology cannot meet that investment operating cost is low and high treating effect simultaneously at present It is required that so that the recovery utilization rate of urban wastewater has a greatly reduced quality, promotes and applies and be restricted.Therefore, current water environment is to environment The environmentally friendly draining technology of friendly efficient, low in cost and there is no potential information requirement town sewage plant tail water proposes more For urgent demand.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of algae pool-Manual moists of urban wastewater treatment firm tail water The environmentally friendly processing method of ground-ecological pond,
By urban wastewater treatment firm tail water followed by the algae pool, artificial swamp and ecological pond,
Wherein, the biology in the algae pool includes algae and bacterium, and algae includes can be directly organic using dissolving in tail water The algae of the hydrophilic component of matter, specially goat's horn crescent moon algae, bacterium include molten in the tail water that can directly cannot be utilized algae The hydrophobic components of solution organic matter are converted into the bacterium of the available form of algae, specially bacillus megaterium and/or false unit cell Bacterium,
Available depth is 2~3m in the algae pool, and algae and bacterium are well-dispersed in the water body in the algae pool, in the algae pool The control of algae bio amount should be salvaged in 0.3~0.5mg Chl-a/L when algae bio amount is more than 0.5mg Chl-a/L in time Superfluous algae controls the volume on the algae pool and the rate of algae pool inflow and outflow to reduce the processing load of subsequent cell, Controlling algae pool hydraulic detention time is 3~4 days;
Artificial swamp includes pond body, and matrix is filled in the cell cavity of pond body, and matrix includes at least haydite, biomass carbon, steel Slag, haydite, biomass carbon, steel slag respectively at occupying different zones space in cell cavity, haydite area, biomass carbon area, steel slag area that This is disposed adjacent and is connected to, and the water from the algae pool passes sequentially through haydite area, biomass carbon area, steel slag area,
Specifically: in artificial swamp pond, it is from top to bottom followed successively by haydite layer, biomass layer of charcoal, Slag Layer, and in cell cavity Matrix flooded completely by the water from the algae pool,
Haydite and biomass carbon are all commercial goods, and after artificial swamp water flowing, the water from the algae pool flows through haydite and life During substance charcoal, microorganism, i.e. indigenous microorganism on haydite and biomass carbon are formd on haydite and biomass carbon,
Steel slag by discarding the fresh steel slag to get off in steelmaking process,
Preferably, artificial swamp mesostroma can also include gravel, zeolite etc.,
On the other hand, kind is implanted with water plant in artificial swamp, and water plant planting is aquatic in the top of pond body mesostroma Plant exposes the horizontal plane in artificial swamp upwards,
Water plant includes canna, Siberian iris, calamus, wild rice stem etc.,
Artificial swamp mesostroma major function is to pass through absorption, filtering to Heavy Metals in Waters and persistent organic pollutants It is removed with the effects of co-precipitation, and the water plant in the microorganism and artificial swamp in matrix is equally artificial swamp function The crucial biotope of performance:
Although matrix itself has the effect of adsorption cleaning to the persistent organic pollutants in water body, but can not incite somebody to action All persistent organic pollutants all adsorb in water body, lead to the remaining of persistent organic pollutants, in this regard, in this programme The steel slag used is by discarding the fresh steel slag to get off in steelmaking process, wherein necessarily (most typically containing variable valency metal Ferrous ion), and applicant thinks: the presence of variable valency metal changes the stromal surface indigenous microorganism in same water body Living environment makes these indigenous microorganisms that the persistent organic pollutants in residual water body be promoted to resolve into small molecule pollution Object imitates the purification of small molecule contaminants regardless of being the water plant in artificial swamp or the plant in subsequent ecological pond Rate will be much higher than its purification efficiency to persistent organic pollutants, therefore convert small molecule for persistent organic pollutants Afterwards, it can be more conducive to the purification to water body,
In addition, artificial swamp passes through the root exudates of water plant or by addition sawdust as additional carbon, it can also To promote artificial swamp to the removal effect of pollutant,
Controlling artificial swamp hydraulic detention time is 3~5 days;
Be built in ecological pond it is biological floating bed, it is biological floating bed using " one kind be used for the smelly river water quality strengthened purification of urban black Three-dimensional it is biological floating bed " design in (application number 201510577900.7),
In addition, be also provided in ecological pond shore bank band aquatic plant zones, shore bank band aquatic plant zones from land region to Water body successively plants arbor, shrub, emergent aquactic plant and submerged plant,
After ecological pond is primarily to stabilize water body further, then it is discharged into receiving water body or reuse,
Ecological floating island laying accounts for the 25% of water surface area, and ecological pond length-width ratio is greater than 5:1, and available depth is 0.3~2.5m, Gradient ratio (ratio of ecological pond bottom of pond drops) is 1:2.5, and control ecological pond hydraulic detention time is 6~8 days.
As preferred: the water outlet on the algae pool through homogeneous filtering material unit filtering after enter artificial swamp, and artificial swamp go out Water equally enters ecological pond after the filtering of homogeneous filtering material unit,
Water body enters artificial swamp from the algae pool, enters ecological pond from artificial swamp, is realized by water body gravity Flowing between the algae pool and artificial swamp, is provided with drop measure between artificial swamp and ecological pond, drop height is set as 0.5~1.0m,
Water plant starts to be gathered in annual October in artificial swamp and ecological pond, and harvesting ratio is 70%, algae The class pool, artificial swamp are provided with water quality on-line monitoring device and water (flow and flow rate) on-Line Monitor Device in ecological pond.
This programme is conceived in targeting removal tail water not to be removed in the organic component and sewage disposal process of bioactive elemements Hazardous contaminant, utilizes dissolved organic matter by algae and bacterium and the hygrophyte of artificial swamp is to city Bioavailable dissolved organic matter and hazardous contaminant are further processed in the sewage treatment plant tail water of town, realize sewage The friendly discharge of plant tail water is handled, to cut down Tail water reuse significantly to the potential hazard of receiving water body water quality, Ecology (such as Lead to receiving water body eutrophication, black smelly phenomenon), it is provided for urban wastewater treatment firm vacuum in draft tube or urban river ecological water supplement Necessary condition, while it being added to urban wastewater treatment landscape patch, enhance Heterogeneity for Urban Landscape, it is also tough for enhancing city Property is laid a good foundation.With energy conservation, low-carbon effect and ecosystem self-regeneration effect, invest small, at low cost, quick, clear Except effect is good, secondary pollution is not generated.
Detailed description of the invention
Fig. 1 is the flow chart of the environmentally friendly processing method in the present invention,
Fig. 2 is the internal structure distribution map (front section view) in artificial swamp pond in the present invention,
Wherein, 1-pond body, the 11-the first baffles, the 12-the second baffles, 13-third baffles, 14-duct (holes It is equipped with waffle slab at road, water flow is allowed to pass through, matrix is stopped to pass through), 2-gravels, 3-zeolites, 4-haydites, 5-biomass Charcoal, 6-steel slags, 7-water plants, the 8-waters surface.
Specific embodiment
Embodiment 1
Using the scheme of the application to the tail water for entering river urban wastewater treatment firm of East China urban river at Reason: before processing, in the tail water concentration of the hydrophilic component of DON dissolved organic matter be 0.32mg/L, DON dissolved organic matter it is hydrophobic The concentration of component is 0.4mg/L, and the concentration of the hydrophilic component of DOP dissolved organic matter is 0.026mg/L, DOP dissolved organic matter The concentration of hydrophobic components is 0.04mg/L, and the concentration of AOX is 0.85mg/L, and the concentration of phenyl amines is 0.43mg/L (AOX and aniline Class represents the persistent organic pollutants in the tail water),
Above-mentioned tail water is by water body gravity followed by the algae pool, artificial swamp, ecological pond, wherein the algae pool and artificial Between wetland, drop measure and switch valve are provided between artificial swamp and ecological pond, drop height is disposed as 1.0m, algae The water outlet on the class pool enters artificial swamp after the filtering of homogeneous filtering material unit, and the water outlet of artificial swamp is equally through homogeneous filtering material unit Enter ecological pond after filtering,
Wherein, fully dispersed in the water body on the algae pool to have goat's horn crescent moon algae, bacillus megaterium, pseudomonas putida (Pseudomonas putida), it is 0.5mg Chl-a/L that goat's horn crescent moon algae, which is added to the initial biomass in the water body of the algae pool, The initial concentration that Bacterium anthracoides, pseudomonas putida are added in the water body of the algae pool is 10mg (dry weight)/m3, control algae Pool hydraulic detention time is 4 days,
Through detecting, at 25 DEG C, from the water that the algae pool comes out, the concentration of the hydrophilic component of DON dissolved organic matter is The concentration of the hydrophobic components of 0.134mg/L, DON dissolved organic matter is 0.092mg/L, the hydrophilic component of DOP dissolved organic matter Concentration is 0.012mg/L, and the concentration of the hydrophobic components of DOP dissolved organic matter is 0.008mg/L,
The water outlet on the algae pool is sampled, the 15th day when observes that the water body example is still in light green color, illustrates wherein Goat's horn crescent moon algae grow fine;
Artificial swamp includes pond body, is filled with matrix in the cell cavity of pond body, matrix has gravel, zeolite, haydite, biomass Charcoal, steel slag, as shown in Fig. 2, a variety of different matrix are filled in each area of space in cell cavity, pass through setting for baffles Meter, makes that the water from the algae pool successively penetrates through gravel area, zeolite area, haydite area, biomass carbon area, steel slag leave pond behind area Body, wherein haydite layer, biomass layer of charcoal, comprehensive connection between the mutual upper and lower interface of Slag Layer, meanwhile, the base in cell cavity Matter is flooded to form artificial swamp (in practical operation, first by different substrates in filling in cell cavity completely by the water from the algae pool The distribution being piled into attached drawing 2, then water flowing),
Kind is implanted with water plant canna in artificial swamp, Growth of Canna in the top of pond body mesostroma, canna The horizontal plane for exposing artificial swamp in Medium Culture and upwards is planted in root,
Steel slag by discarding the fresh steel slag to get off in steelmaking process,
Controlling artificial swamp hydraulic detention time is 5 days;
Ecological pond available depth be 2m, waters center be built with it is biological floating bed, it is biological floating bed using " one kind be used for urban black The three-dimensional of smelly river water quality strengthened purification is biological floating bed " design of embodiment 1 in (application number 201510577900.7), Ecological floating island laying accounts for the 25% of water surface area, and control ecological pond hydraulic detention time is 7 days,
Through detecting, at 25 DEG C, from the water that ecological pond comes out, the concentration of AOX is 0.188mg/L, and the concentration of phenyl amines is 0.045mg/L, water outlet comply fully with the standard for being discharged into the receiving water bodies such as river on the whole.
Comparative example 1
Compared with Example 1, it is added without bacillus megaterium and pseudomonas putida in the algae pool, remaining processing operation is equal With embodiment 1.
Through detecting, at 25 DEG C, from the water that the algae pool comes out, the concentration of the hydrophilic component of DON dissolved organic matter is The concentration of the hydrophobic components of 0.157mg/L, DON dissolved organic matter is 0.396mg/L, the hydrophilic component of DOP dissolved organic matter Concentration is 0.016mg/L, and the concentration of the hydrophobic components of DOP dissolved organic matter is 0.04mg/L,
The water outlet on the algae pool is sampled, water body example is placed under equal ambient (with embodiment 1), at the 15th day Observe that the water body example in light yellow, illustrates that goat's horn crescent moon algae therein is substantially dead, then water body gradually appears nigrescence backward Smelly phenomenon.
The above results illustrate that water body Central Plains should be used to give birth to without goat's horn crescent moon algae enough, for being added in water body Component that is long or sustaining life, while also demonstrating the addition of bacillus megaterium and pseudomonas putida in embodiment 1, it should It is to convert the hydrophobic components of quite a few dissolved organic matter to the absorbable form of goat's horn crescent moon algae, has on the one hand ensured sheep The life of angle crescent moon algae and growth, extend the time-to-live of goat's horn crescent moon algae, it is made to have reusable property, another party Face also effectively removes the hydrophobic components of the dissolved organic matter in water body.
Through detecting, at 25 DEG C, from the water that ecological pond comes out, the concentration of AOX is 0.341mg/L, and the concentration of phenyl amines is 0.135mg/L。
Comparative example 2
Compared with Example 1, steel slag used in artificial swamp be embodiment 1 in steel slag it is fully oxidized in oxidation furnace after Steel slag (after fully oxidized, the variable valency metal in steel slag reaches metastable valence state), remaining processing operation with implement Example 1.
Through detecting, at 25 DEG C, from the water that ecological pond comes out, the concentration of AOX is 0.462mg/L, and the concentration of phenyl amines is 0.208mg/L.As it can be seen that can not show a candle to for the elimination effect of persistent organic pollutants in the steel slag of artificial swamp containing the gold that appraises at the current rate The embodiment 1 of category.
Comparative example 3
Compared with Example 1, " the goat's horn crescent moon algae (Selenastrum in the water body of the algae pool will be added Bibraianum) " replace with etc. biological dosage concentration " chlorella (Chlorella vulgaris) " (goat's horn crescent moon Trentepohlia in Crescent moon Trentepohlia, Chlorella here is in Chlorella, and crescent moon Trentepohlia and Chlorella all range chlorella section), remaining Processing operation is the same as embodiment 1.
Through detecting, at 25 DEG C, from the water that the algae pool comes out, the concentration of the hydrophilic component of DON dissolved organic matter is The concentration of the hydrophobic components of 0.176mg/L, DON dissolved organic matter be 0.31mg/L, the hydrophilic component of DOP dissolved organic matter it is dense Degree is 0.017mg/L, and the concentration of the hydrophobic components of DOP dissolved organic matter is 0.032mg/L,
The water outlet on the algae pool is sampled, water body example is placed under equal ambient (with embodiment 1), at the 15th day It is smelly to observe that the water body example has blacked, illustrates chlorella dead therein for some time, this is likely due to Under the action of bacillus megaterium and pseudomonas putida, the form after the hydrophobic components conversion of dissolved organic matter can not be small Ball algae is absorbed and utilized and causes;
Through detecting, at 25 DEG C, from the water that ecological pond comes out, the concentration of AOX is 0.272mg/L, and the concentration of phenyl amines is 0.154mg/L。
For the ease of comparing, by the tail water for entering river urban wastewater treatment firm of East China urban river in following table, Each contaminants associated original concentration and concentration (the algae pool out after the various embodiments described above, comparative example purified treatment When concentration, go out ecological pond when concentration) enumerated:

Claims (6)

1. a kind of algae pool-environmentally friendly processing method of artificial swamp-ecological pond of urban wastewater treatment firm tail water, special Sign is: the processing method is,
By urban wastewater treatment firm tail water followed by the algae pool, artificial swamp and ecological pond,
Wherein, the biology in the algae pool includes algae and bacterium, and the algae includes that can directly utilize the tail water The algae of the hydrophilic component of middle dissolved organic matter, the bacterium include can by algae described in the tail water cannot directly benefit The hydrophobic components of dissolved organic matter are converted into the bacterium of the available form of the algae;
The artificial swamp includes pond body, matrix is filled in the cell cavity of the pond body, the matrix includes haydite, biomass Charcoal, steel slag, the matrix in the cell cavity completely by the water submerged from the algae pool,
Also kind is implanted with water plant in the artificial swamp, the matrix of the water plant planting in the pond body it is upper Portion, the water plant expose the horizontal plane in the artificial swamp upwards;
It is built in the ecological pond biological floating bed.
2. the algae pool-environmentally friendly processing method of artificial swamp-ecological pond as described in claim 1, it is characterised in that: The algae is goat's horn crescent moon algae, and the bacterium is bacillus megaterium and/or pseudomonad.
3. the algae pool-environmentally friendly processing method of artificial swamp-ecological pond as described in claim 1, it is characterised in that: The water plant includes canna, Siberian iris, calamus, wild rice stem.
4. the algae pool-environmentally friendly processing method of artificial swamp-ecological pond as described in claim 1, it is characterised in that: The hydraulic detention time on the algae pool is 3~4 days, and the hydraulic detention time of the artificial swamp is 3~5 days, the ecology The hydraulic detention time on the pool is 6~8 days.
5. the algae pool-environmentally friendly processing method of artificial swamp-ecological pond as described in claim 1, it is characterised in that: The water outlet on the algae pool enters the artificial swamp after the filtering of homogeneous filtering material unit, and the water outlet of the artificial swamp is same Enter the ecological pond after the filtering of homogeneous filtering material unit.
6. the algae pool-environmentally friendly processing method of artificial swamp-ecological pond as described in claim 1, it is characterised in that: It is provided with drop measure between the algae pool and the artificial swamp, between the artificial swamp and the ecological pond, Drop height is set as 0.5~1.0m.
CN201910396853.4A 2019-05-14 2019-05-14 A kind of algae pool-environmentally friendly processing method of artificial swamp-ecological pond of urban wastewater treatment firm tail water Pending CN110092543A (en)

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CN111204927A (en) * 2020-01-17 2020-05-29 棕榈生态城镇发展股份有限公司 Ecological public toilet sewage treatment circulating system and sewage treatment and recycling method

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