CN107973487A - A kind of dyeing and finishing wastewater level treatment process and device - Google Patents

A kind of dyeing and finishing wastewater level treatment process and device Download PDF

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Publication number
CN107973487A
CN107973487A CN201711125866.5A CN201711125866A CN107973487A CN 107973487 A CN107973487 A CN 107973487A CN 201711125866 A CN201711125866 A CN 201711125866A CN 107973487 A CN107973487 A CN 107973487A
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China
Prior art keywords
filter
water
water inlet
backwash
regulating valve
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CN201711125866.5A
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CN107973487B (en
Inventor
李响
薛罡
陈红
钱雅洁
张文启
刘振鸿
方庭玕
徐先宝
刘云帆
王静
袁健
王麒
李珂
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Shanghai Sen Sen Environmental Engineering Co Ltd
Donghua University
National Dong Hwa University
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Shanghai Sen Sen Environmental Engineering Co Ltd
Donghua University
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C02F2101/308—Dyes; Colorants; Fluorescent agents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/30—Nature of the water, waste water, sewage or sludge to be treated from the textile industry
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/16—Regeneration of sorbents, filters
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2305/00—Use of specific compounds during water treatment
    • C02F2305/02—Specific form of oxidant
    • C02F2305/023—Reactive oxygen species, singlet oxygen, OH radical
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2305/00—Use of specific compounds during water treatment
    • C02F2305/06—Nutrients for stimulating the growth of microorganisms
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Biological Treatment Of Waste Water (AREA)

Abstract

The invention discloses a kind of dyeing and finishing wastewater level treatment process and device, described device includes raw water pump and level biofilter；The top of level biofilter is equipped with water outlet catch basin, water outlet and catchments total canal；The backwashing pump water inlet pipe of the bottom and backwashing pump in water outlet and backwash pond connects, backwashing pump outlet pipe and backwashing pump return duct the access filter back washing water inlet pipe of backwashing pump；Level biofilter bottom is equipped with filter tank perforation water distributor, aeration and backwash micropore gas distribution pipe.Treatment process is：Waste water enters level biofilter, and through aeration, the reduction of iron biomass carbon-coating, oxidation processes, the ammonium oxidation in waste water is nitrate nitrogen under aerobic condition by filter layer；Nitrate nitrogen in the waste water autotrophic denitrification under the action of autotrophic denitrification bacterium；Phosphorus reaction generation precipitation.The present invention has multistage iron biomass carbon reduction, OH oxidations, biological agent concurrently, can reach in level-one biofilter except carbon, denitrogenation and phosphor-removing effect.

Description

A kind of dyeing and finishing wastewater level treatment process and device
Technical field
The invention belongs to industrial waste water treatment, and in particular to a kind of dyeing and finishing wastewater level treatment process and dress Put.
Background technology
Textile printing and dyeing wastewater and organic pollution discharge capacity are big, occupy national industrial trade 3~4；Chemical synthetic dye helps The use of agent, the lifting of wastewater discharge standard, make dyeing water treatment difficulty increasingly increase；Meanwhile the low profit margin of dyeing Feature, make wastewater processing technology must have high efficiency, low cost feature.
Dyeing waste water generally using traditional secondary biochemical treatment technology of materialization, biochemical combination, or using secondary biochemical with The combination of three-level advanced treating.Wherein secondary biochemical treatment process residence time factory, take up a large area, operating cost is higher etc. no The many factors such as foot, directly limit the technical and economic performance of integrated artistic.As nitrogen phosphorus is exceeded in waste water, in organics removal Still need at the same time and consider bioanalysis denitrogenation dephosphorizing, further increase the complexity of technique.Therefore, secondary biochemical treatment effect is lifted Rate, is the key link for optimizing integrated artistic efficiency and cost.
The content of the invention
Problem to be solved by this invention is：The problem of existing secondary biochemical treatment efficiency is low.
To solve the above-mentioned problems, the present invention provides a kind of dyeing and finishing wastewater level processing unit, including raw water pump, raw water The raw water pump water inlet pipe of pump is connected with former pond, and raw water pump water inlet pipe is equipped with raw water pump water inlet pipe regulating valve, it is characterised in that Further include level biofilter, the side connection filter tank water inlet manifold of level biofilter bottom；The top of former pond is equipped with original Water pump return duct, raw water pump return duct are equipped with raw water pump return duct regulating valve, and raw water pump return duct, the raw water of raw water pump pump out Water pipe access filter tank water inlet is in charge of, and filter tank water inlet is in charge of is in charge of regulating valve, filter tank water inlet pipe check-valves equipped with filter tank water inlet；Layer The top of level biofilter is equipped with water outlet catch basin, and the side of water outlet catch basin is catchmented total canal equipped with the water outlet communicated therewith, is gone out Water catchment total canal bottom connect respectively backwash drainpipe, filter tank outlet pipe, backwash drainpipe be equipped with backwash draining Pipe regulating valve, filter tank outlet pipe are equipped with filter tank outlet pipe regulating valve, and the port of export of filter tank outlet pipe is arranged on water outlet and backwash The top in pond；The backwashing pump water inlet pipe of the bottom and backwashing pump in water outlet and backwash pond connects, backwashing pump water inlet Pipe is equipped with backwashing pump water inlet pipe regulating valve, backwashing pump outlet pipe and backwashing pump return duct the access filter tank of backwashing pump Water inlet pipe is backwashed, backwashing pump return duct is equipped with backwashing pump return duct regulating valve, the port of export of backwashing pump return duct Arranged on the top in water outlet and backwash pond；Filter back washing water inlet pipe and filter tank water inlet are in charge of to be connected with filter tank water inlet manifold, Filter back washing water inlet pipe is equipped with filter back washing water inlet pipe regulating valve, backwash water inlet pipe check-valves；Level biofilter The blower air pipe of the opposite side of bottom and air blower connects, blower air pipe be equipped with blower air pipe check-valves, Blower air pipe regulating valve, level biofilter bottom are equipped with and are connected respectively with filter tank water inlet manifold, blower air pipe Filter tank perforation water distributor, aeration and backwash micropore gas distribution pipe.
Preferably, multiple layers of filters is equipped with the level biofilter, filter tank perforation water distributor, aeration and backwash are micro- Hole gas distribution pipe is arranged in the filter layer of bottommost, the bottoms of other filter layers be equipped with one piece be used for fixation orifice plate.
Preferably, at least one inspection manhole is equipped with the outside of the level biofilter, inspection manhole is located at adjacent head Between layer.
It is highly preferred that the filter layer uses coke packing layer or iron-biomass carbon-coating, the bottom of filter layer is equipped with optional Gravel supporting layer.
It is highly preferred that being equipped with four layers of filter layer in the level biofilter, the first filter layer, are sequentially consisted of Two filter layers, the 3rd filter layer, the 4th filter layer, the first filter layer include the iron-biomass carbon-coating one on upper strata and the gravel of lower floor Stone supporting layer one；Second filter layer includes coke packing layer one, the gravel supporting layer two on upper strata, its bottom is equipped with orifice plate one；The Three filter layers include iron-biomass carbon-coating two, its bottom is equipped with orifice plate two；4th filter layer includes the coke packing layer two on upper strata With the gravel supporting layer three of lower floor, its bottom is equipped with orifice plate three.
It is highly preferred that relative to being equipped with maintenance between the first filter layer and the second filter layer on the outside of the level biofilter Manhole one, relative to inspection manhole two is equipped between the second filter layer and the 3rd filter layer, relative to the 4th filter layer and top Water outlet catch basin between be equipped with inspection manhole three.
It is highly preferred that the preparation method of the iron-biomass carbon-coating is：By the activated sludge that moisture content is 60%-90% Add in retort, dosage is the 40%-85% of tank volume, and airtight heating, temperature is 140-220 DEG C, is stopped after heating 1-8h Only heat, retort is opened after cooling the temperature to 60-80 DEG C, add the iron powder that quality is mud dry weight 5%-30%, it is again close Retort is closed, continues to be heated to 180-240 DEG C, heats 0.5-4h, temperature is down to less than 50 DEG C dischargings, precipitation is taken after centrifugation Thing；After 105 DEG C of drying of sediment or natural air drying, it is wrapped up with the weaving of plasticity net and is molded, often wrap weight 20-80kg.
It is highly preferred that the thickness of the filter layer is 800~1000mm；The particle diameter of coke filtrate is in coke packing layer 5~10mm；The thickness of gravel supporting layer is 300mm；The thickness of iron-biomass carbon-coating is 500~b00mm.
It is highly preferred that the 100mm thickness of the gravel supporting layer including lower floor, the gravel layer of 20~30mm of particle diameter, middle level 100mm thickness, the gravel layer of 10~20mm of particle diameter and the 100mm on upper strata thickness, the gravel layer of 5~10mm of particle diameter.
Preferably, during filtering, raw water pump water inlet pipe regulating valve, raw water pump return valve, filter tank water inlet be in charge of regulating valve, Filter tank outlet pipe regulating valve, blower air pipe regulating valve are opened, backwashing pump return duct regulating valve, filter back washing water inlet pipe Regulating valve, backwashing pump water inlet pipe regulating valve, backwash drainpipe regulating valve are closed, and are opened raw water pump, air blower, that is, are started Filter；When filtering terminates backwash, raw water pump, raw water pump water inlet pipe regulating valve, raw water pump return valve, filter tank water inlet pipe are closed Regulating valve, filter tank outlet pipe regulating valve, open backwash pump, backwashing pump return duct regulating valve, filter back washing water inlet pipe Regulating valve, backwashing pump water inlet pipe regulating valve, backwash drainpipe regulating valve, that is, start to backwash；Pressed after backwash Filter step and carry out normal filtration.
Present invention also offers a kind of dyeing and finishing wastewater level treatment process, it is characterised in that uses above-mentioned dyeing and finishing wastewater layer Level processing unit, comprises the following steps：
Step 1)：The COD of dyeing and finishing technology discharge is filter of the waste water of 500~800mg/L through bottom in level biofilter Pond perforation water distributor enters level biofilter, and air blower is oxygenated through being aerated and backwashing micropore gas distribution pipe into waste water；
Step 2)：After aeration, iron-biomass carbon-coating reduction, oxidation processes, useless water part organic matter is gone waste water Remove, meanwhile, the ammonium oxidation in waste water is nitrate nitrogen under aerobic condition by filter layer；
Step 3)：The filter layer that waste water enters upper strata is further handled；Meanwhile by controlling aeration quantity to make the filtering on upper strata Layer be in anaerobic condition, and the nitrate nitrogen in waste water is under the action of autotrophic denitrification bacterium, using the FeO in filter layer as electronics confession Body, with carbonate in waste water or CO2Autotrophic denitrification is realized for inorganic carbon source；
Step 4)：In step 2), step 3), phosphorus and Fe of the iron-biomass carbon-coating through corrosion release in waste water3+Generation FePO4Precipitation, and by the crown_interception of filter layer by FePO4Precipitation removes.
Preferably, the start-up course of level biofilter is in the step 1)：Municipal sewage plant two is sunk first Pond sludge seeding in level biofilter, early period run when, control hydraulic load for Design cooling load 30%~40%, then by Step increases to Design cooling load.
Preferably, the level-one/two level filter tank is periodically backwashed, and backwash uses combined water and air backwash.
It is highly preferred that the aeration and the gas-water ratio of backwash micropore gas distribution pipe oxygenation are 8~10: 1；Level biofilter Hydraulic load be 2~5m3/(m2·h)。
It is highly preferred that the level biofilter water outlet COD or turbidity rise 20%, that is, start to backwash；Backwash Design parameter is：Gas flushing intensity is 3~5L/ (m2H), water backwash rate is 10~12L/ (m2H), first gas punching 2~ 4min, then water rush 8~10min.
Level combinatorial principle of the invention based on iron-biomass carbon and biofilter, can obtain in same biofilter Better than the organic matter removal effect of Traditional materialized, biochemical two stage treatment technique, and good Nitrogen/Phosphorus Removal can be reached at the same time.
Compared with prior art, the beneficial effects of the present invention are：
(1) compared with traditional dyeing and finishing waste water secondary biochemical treatment technique, the present invention has multistage iron-biomass carbon concurrently also Former, OH oxidations, biological agent, can reach in level-one biofilter better than traditional dyeing and finishing waste water secondary biochemical treatment technique Except carbon, denitrogenation and phosphor-removing effect；
(2) compared with traditional dyeing and finishing waste water secondary biochemical treatment technique, at a kind of dyeing waste water level proposed by the present invention Science and engineering skill and biofilter, have the advantages that small floor space, investment and operating cost are low, it is low, scarce to be very suitable for profit margin The waste water of the textile printing and dyeing enterprises of weary floor space proposes mark transformation.
Brief description of the drawings
Fig. 1 is a kind of structure diagram of dyeing and finishing wastewater level processing unit provided by the invention.
Embodiment
To become apparent the present invention, hereby with preferred embodiment, and attached drawing is coordinated to be described in detail below.
Embodiment
As shown in Figure 1, be dyeing and finishing wastewater level processing unit provided by the invention, it includes former pond 10, water outlet and anti- Rinse pond 1, level biofilter 23, raw water pump 16, backwash pump 3, air blower 38.10 lower right side of former pond and raw water Pump water inlet pipe 43 is connected, and raw water pump water inlet pipe regulating valve 42, the right side of raw water pump water inlet pipe 43 are set on raw water pump water inlet pipe 43 It is connected with raw water pump 16；16 upper left quarter of raw water pump is connected with raw water water pump outlet pipe 15, and 15 top of raw water water pump outlet pipe passes through Threeway is connected with left side raw water pump return duct 11, and raw water pump return valve 12, raw water pump are set on raw water pump return duct 11 15 top of outlet pipe is in charge of 44 with the water inlet of right side filter tank by threeway and is connected, and filter tank water inlet, which is in charge of on 44, sets filter tank into moisture Pipe regulating valve 13 is in charge of check-valves 14 with filter tank water inlet；Water outlet and backwash 1 lower right side of pond and 3 phase of backwashing pump water inlet pipe Connect, backwashing pump water inlet pipe regulating valve 2, the right side of backwashing pump water inlet pipe 3 and backwashing pump are set on backwashing pump water inlet pipe 3 45 are connected；45 left upper portion of backwashing pump is connected with backwashing pump outlet pipe 4, and 4 top of backwashing pump outlet pipe passes through three It is logical to be connected with left side backwashing pump return duct 5, backwashing pump return duct regulating valve 6, recoil are set on backwashing pump return duct 5 Wash 4 top of water pump outlet pipe by threeway with right side filter back washing water inlet pipe 7 to be connected, set on filter back washing water inlet pipe 7 Filter back washing water inlet pipe regulating valve 8 and filter back washing water inlet pipe check-valves 9；Filter back washing water inlet pipe 7 is intake with filter tank It is in charge of44 converged by threeway after be connected with filter tank water inlet manifold 17；The left side of air blower 38 is connected with blower air pipe 35 Connect, blower air pipe regulating valve 37 and blower air pipe check-valves 36, blower air are set on blower air pipe 35 The left side of pipe 35 is connected with filter tank bottom；23 bottom of level biofilter sets gravel supporting layer 34, is buried in gravel supporting layer 34 If filter tank is perforated, water distributor 46 is intake with being aerated and backwashing micropore gas distribution pipe 47, filter tank perforation water distributor 46 and the filter tank in left side Manifold 17 is connected, and is aerated and backwashes micropore gas distribution pipe 47 and be connected with the blower air pipe 35 on right side.
Four layers of filter layer is equipped with the level biofilter 23, sequentially consists of the first filter layer, the second filtering Layer, the 3rd filter layer, the 4th filter layer, the first filter layer includes the iron-biomass carbon-coating 1 on upper strata and the gravel of lower floor is held Hold in the palm layer 1；Second filter layer includes coke packing layer 1, the gravel supporting layer 2 31 on upper strata, its bottom is equipped with orifice plate one 32；3rd filter layer includes iron-biomass carbon-coating 2 28, its bottom is equipped with orifice plate 2 29；4th filter layer includes Jiao on upper strata Carbon filling material layer 2 25 and the gravel supporting layer 3 26 of lower floor, its bottom are equipped with orifice plate 3 27.Set out on coke packing layer 2 25 Water catch basin 24, the left side of water outlet catch basin 24 and water outlet total canal 22 that catchments are connected, and water outlet catchments total 22 left bottom of canal with filtering Pond outlet pipe 18 is connected, and sets filter tank outlet pipe regulating valve 19 on filter tank outlet pipe 18, water outlet catchment total 22 bottom of canal with it is anti- Flush discharge pipe 21 is connected, and backwashes and backwash drainpipe regulating valve 20 is set on drainpipe 21.
Waste water raw water in the present embodiment comes from the dyeing waste-water of the production technology discharge of Jiangsu printing and dyeing enterprise, COD For 550~700mg/L.The dyeing and finishing wastewater level treatment process that the present embodiment proposes, for handling above-mentioned dyeing waste water, specific side Method and step are：(1) dyeing waste water enters level biofilter 23 through 23 lower part filter tank of level biofilter perforation water distributor 46 Lower floor；The aeration and backwash micropore gas distribution pipe 47 that 23 bottom of level biofilter is set are oxygenated into waste water；Level biological filter The hydraulic load that pond 23 is run is 3.0m3/(m2·h)；It is 9: 1 to be aerated gas-water ratio；(2) in 23 lower floor of level biofilter, first After aeration iron-biomass carbon reduction, oxidation processes, useless water part organic matter is removed, and biodegradability is improved, then Handled by filtering layer；Meanwhile ammonium oxidation in waste water can be nitrate nitrogen under aerobic condition by chitosan fluid dressing；(3) waste water is through filter After pond lower floor iron-biomass carbon, the processing of life assemblage filtering layer, further handled into upper strata filtering layer；Upper strata filtering layer is filtered with lower floor Layer is identical, using iron-biomass carbon, chitosan fluid dressing combination；After lower floor's filtering layer processing, most of difficult degradation in waste water Organic matter is removed；Meanwhile by controlling aeration quantity upper strata is in anaerobic condition, nitrate nitrogen in waste water is from the anti-nitre of oxygen Under the action of changing bacterium, with Fe0For electron donor, using in waste water, carbonate is realized from oxygen denitrogenation as inorganic carbon source.Through above-mentioned biology After the processing of filter tank, water outlet COD, which stablizes, is less than 60mg/L.
When filtering terminates backwash, raw water pump 16, raw water pump water inlet pipe regulating valve 42, raw water pump return valve are closed 12nd, filter tank water inlet pipe regulating valve 13, filter tank outlet pipe regulating valve 19, open backwash pump 45, backwashing pump return duct is adjusted Valve 6, filter back washing water inlet pipe regulating valve 8, backwashing pump water inlet pipe regulating valve 2, backwash drainpipe regulating valve 20, that is, start Backwash；After backwash normal filtration is carried out by filtration step.

Claims (15)

1. a kind of dyeing and finishing wastewater level processing unit, including raw water pump (16), the raw water pump water inlet pipe (43) of raw water pump (16) with Former pond (10) connects, and raw water pump water inlet pipe (43) is equipped with raw water pump water inlet pipe regulating valve (42), it is characterised in that further includes Level biofilter (23), the side connection filter tank water inlet manifold (17) of level biofilter (23) bottom；Former pond (10) Top is equipped with raw water pump return duct (11), and raw water pump return duct (11) is equipped with raw water pump return duct regulating valve (12), raw water pump Raw water water pump outlet pipe (15) the access filter tank water inlet of return duct (11), raw water pump (16) is in charge of (44), and filter tank water inlet is in charge of (44) It is equipped with filter tank water inlet and is in charge of regulating valve (13), filter tank water inlet pipe check-valves (14)；The top of level biofilter (23) is equipped with Water outlet catch basin (24), the side of water outlet catch basin (24) are equipped with the water outlet communicated therewith and catchment total canal (22), and water outlet is catchmented always The bottom of canal (22) connects backwash drainpipe (21), filter tank outlet pipe (18) respectively, and backwash drainpipe (23) is equipped with anti- Flush discharge pipe regulating valve (20), filter tank outlet pipe (28) are equipped with filter tank outlet pipe regulating valve (19), filter tank outlet pipe (28) The port of export be arranged on water outlet and backwash pond (1) top；Water outlet and bottom and the backwashing pump (45) for backwashing pond (1) Backwashing pump water inlet pipe (3) connection, backwashing pump water inlet pipe (3) is equipped with backwashing pump water inlet pipe regulating valve (2), backwash Pump the backwashing pump outlet pipe (4) and backwashing pump return duct (5) access filter back washing water inlet pipe (7) of (45), backwashing pump Return duct (5) is equipped with backwashing pump return duct regulating valve (6), and the port of export of backwashing pump return duct (5) is arranged on water outlet and anti- Rinse the top of pond (1)；Filter back washing water inlet pipe (7) and filter tank water inlet are in charge of (44) and are connected with filter tank water inlet manifold (17) Logical, filter back washing water inlet pipe (7) is equipped with filter back washing water inlet pipe regulating valve (8), backwash water inlet pipe check-valves (9)； The opposite side of level biofilter (23) bottom is connected with the blower air pipe (35) of air blower (38), blower air pipe (35) blower air pipe check-valves (36), blower air pipe regulating valve (37), level biofilter (23) bottom are equipped with Equipped with filter tank perforation water distributor (46), the aeration and anti-connected respectively with filter tank water inlet manifold (17), blower air pipe (35) Rinse micropore gas distribution pipe (47).
2. dyeing and finishing wastewater level processing unit as claimed in claim 1, it is characterised in that in the level biofilter (23) Equipped with multiple layers of filters, filter tank perforation water distributor (46), aeration and backwash micropore gas distribution pipe (47) are arranged on the filtering of bottommost In layer, the bottoms of other filter layers be equipped with one piece be used for fixation orifice plate.
3. dyeing and finishing wastewater level processing unit as claimed in claim 1 or 2, it is characterised in that the level biofilter (23) outside is equipped with least one inspection manhole, and inspection manhole is between adjacent filter layers.
4. dyeing and finishing wastewater level processing unit as claimed in claim 2, it is characterised in that the filter layer uses coke packing Layer or iron-biomass carbon-coating, the bottom of filter layer are equipped with optional gravel supporting layer.
5. dyeing and finishing wastewater level processing unit as claimed in claim 4, it is characterised in that in the level biofilter (23) Equipped with four layers of filter layer, the first filter layer, the second filter layer, the 3rd filter layer, the 4th filter layer are sequentially consisted of, first Filter layer includes the iron-biomass carbon-coating one (33) on upper strata and the gravel supporting layer one (34) of lower floor；Second filter layer includes upper Coke packing layer one (30), the gravel supporting layer two (31) of layer, its bottom is equipped with orifice plate one (32)；3rd filter layer include iron- Biomass carbon-coating two (28), its bottom are equipped with orifice plate two (29)；The coke packing layer two (25) of 4th filter layer including upper strata and The gravel supporting layer three (26) of lower floor, its bottom are equipped with orifice plate three (27).
6. dyeing and finishing wastewater level processing unit as claimed in claim 5, it is characterised in that phase on the outside of the level biofilter For being equipped with inspection manhole one (39) between the first filter layer and the second filter layer, relative to the second filter layer and the 3rd filter layer Between be equipped with inspection manhole two (40), be equipped with inspection manhole relative between the 4th filter layer and the water outlet catch basin (24) at top Three (41).
7. dyeing and finishing wastewater level processing unit as described in claim 4 or 5, it is characterised in that the iron-biomass carbon-coating Preparation method is：The activated sludge that moisture content is 60%-90% is added in retort, dosage is the 40%- of tank volume 85%, airtight heating, temperature is 140-220 DEG C, stops heating after heating 1-8h, reaction is opened after cooling the temperature to 60-80 DEG C Tank, adds the iron powder that quality is mud dry weight 5%-30%, again confined reaction tank, continues to be heated to 180-240 DEG C, heating 0.5-4h, temperature are down to less than 50 DEG C dischargings, taking precipitate after centrifugation；, will after 105 DEG C of drying of sediment or natural air drying It is wrapped up with the weaving of plasticity net and is molded, and often wraps weight 20-80kg.
8. dyeing and finishing wastewater level processing equipment as described in claim 4 or 5, it is characterised in that the thickness of the filter layer is equal For 800~1000mm；The particle diameter of coke filtrate is 5~10mm in coke packing layer；The thickness of gravel supporting layer is 300mm；Iron- The thickness of biomass carbon-coating is 500~600mm.
9. dyeing and finishing wastewater level processing unit as claimed in claim 5, it is characterised in that the gravel supporting layer includes lower floor 100mm thickness, the gravel layer of 20~30mm of particle diameter, the 100mm in middle level be thick, the gravel layer of 10~20mm of particle diameter and upper strata 100mm is thick, the gravel layer of 5~10mm of particle diameter.
10. dyeing and finishing wastewater level processing unit as claimed in claim 1, it is characterised in that during filtering, raw water pump water inlet pipe tune Regulating valve (13), filter tank outlet pipe regulating valve (19), drum are in charge of in section valve (42), raw water pump return valve (12), filter tank water inlet Blower air pipe regulating valve (37) is opened, backwashing pump return duct regulating valve (6), filter back washing water inlet pipe regulating valve (8), anti- Flushing pump water inlet pipe regulating valve (2), backwash drainpipe regulating valve (20) are closed, and open raw water pump (16), air blower (38), i.e., Start to filter；When filtering terminates backwash, raw water pump (16), raw water pump water inlet pipe regulating valve (42), raw water pump reflux tune are closed Valve (12), filter tank water inlet pipe regulating valve (13), filter tank outlet pipe regulating valve (19) are saved, opens backwash pump (45), backwash Blowback flow tube regulating valve (6), filter back washing water inlet pipe regulating valve (8), backwashing pump water inlet pipe regulating valve (2), backwash row Water Pipe Valve (20), that is, start to backwash；After backwash normal filtration is carried out by filtration step.
11. a kind of dyeing and finishing wastewater level treatment process, it is characterised in that using the dyeing and finishing described in claim 1-10 any one Waste water level processing unit, comprises the following steps：
Step 1)：The COD of dyeing and finishing technology discharge is filter of the waste water of 500~800mg/L through level biofilter (23) interior bottom Pond perforation water distributor (46) enter level biofilter (23), air blower (38) through be aerated and backwash micropore gas distribution pipe (47) to It is oxygenated in waste water；
Step 2)：After aeration, iron-biomass carbon-coating reduction, oxidation processes, useless water part organic matter is removed waste water, Meanwhile the ammonium oxidation in waste water is nitrate nitrogen under aerobic condition by filter layer；
Step 3)：The filter layer that waste water enters upper strata is further handled；Meanwhile by controlling aeration quantity to make at the filter layer on upper strata Nitrate nitrogen in anaerobic condition, waste water under the action of autotrophic denitrification bacterium, using the FeO in filter layer as electron donor, with Carbonate or CO in waste water2Autotrophic denitrification is realized for inorganic carbon source；
Step 4)：In step 2), step 3), phosphorus and Fe of the iron-biomass carbon-coating through corrosion release in waste water3+Generate FePO4 Precipitation, and by the crown_interception of filter layer by FePO4Precipitation removes.
12. dyeing and finishing wastewater level treatment process as claimed in claim 11, it is characterised in that level biology in the step 1) The start-up course in filter tank (23) is：First by municipal sewage plant's secondary settling tank sludge seeding in level biofilter (23), When early period is run, control hydraulic load then to be gradually increased to Design cooling load for the 30%~40% of Design cooling load.
13. dyeing and finishing wastewater level treatment process as claimed in claim 11, it is characterised in that determine in the level-one/two level filter tank Phase is backwashed, and backwash uses combined water and air backwash.
14. dyeing and finishing wastewater level treatment process as claimed in claim 13, it is characterised in that the aeration and backwash micropore The gas-water ratio of gas distribution pipe (47) oxygenation is 8~10: 1；The hydraulic load of level biofilter (23) is 2~5m3/(m2·h)。
15. dyeing and finishing wastewater level treatment process as claimed in claim 13, it is characterised in that the level biofilter (23) Water outlet COD or turbidity rise 20%, that is, start to backwash；The design parameter of backwash is：Gas flushing intensity is 3~5L/ (m2 H), water backwash rate is 10~12L/ (m2H), first gas rushes 2~4min, and then water rushes 8~10min.
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