CN103880193A - Method for treating wastewater from livestock and poultry breeding by constructing vertical flow artificial wetland based on water supply plant sludge - Google Patents

Method for treating wastewater from livestock and poultry breeding by constructing vertical flow artificial wetland based on water supply plant sludge Download PDF

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CN103880193A
CN103880193A CN201410137254.8A CN201410137254A CN103880193A CN 103880193 A CN103880193 A CN 103880193A CN 201410137254 A CN201410137254 A CN 201410137254A CN 103880193 A CN103880193 A CN 103880193A
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livestock
wastewater
breeding wastewater
water supply
poultry breeding
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CN103880193B (en
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裴元生
刘娟凤
王昌辉
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Beijing Normal University
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Beijing Normal University
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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 invention discloses a method for treating wastewater from livestock and poultry breeding based on a vertical flow artificial wetland with water supply plant sludge as fillers, belonging to the technical field of wastewater treatment. The method is characterized in that water supply plant sludge is dried and crushed as fillers to construct a vertical flow artificial wetland for treating high-concentration wastewater from livestock and poultry breeding, wastewater from livestock and poultry breeding is allowed to enter the artificial wetland by stages and discharged out from the system for a certain hydraulic retention time under the condition of intermittent aeration. The pollutants such as organic substances, nitrogen and phosphorus in wastewater can be effectively removed by the treatment method disclosed by the invention and the total removal rates of ammonia nitrogen and total phosphorus are higher than 90%. According to the method disclosed by the invention, the problem of a way out for water supply plant sludge is also solved while wastewater from livestock and poultry breeding is effectively treated, and thus the method is conducive to achieving a purpose of "treatment of wastes with processes of wastes" and is in line with the concept of circular economy and sustainable development.

Description

Build the method for vertical current constructed wetland processing breeding wastewater based on waterworks sludge
Technical field
The invention belongs to Water Pollution Control Engineering technical field of sewage, be specifically related to a kind of method of the vertical current constructed wetland processing breeding wastewater taking waterworks sludge as filler.
Background technology
Along with developing rapidly of large-scale cultivation industry, breeding wastewater pollutes more and more serious.The feature of livestock breeding wastewater is high suspended matter, high organism and high ammonia nitrogen, and biodegradability is strong.At present large-scale cultivation wastewater treatment is adopted to conventional anaerobism-well foster combination process or SBR treatment process conventionally.As application (patent) numbers 201210493586.0 relates to a kind of aerobic reactor that adopts semifixed vehicle treated livestock breeding wastewater; Application (patent) numbers 201010250262.5 discloses a kind of two-stage anaerobic-tower type filter chamber livestock/poultry wastewater treatment system and treatment process; Application (patent) numbers 201010594251.9 discloses a kind of technology of efficiently processing livestock breeding wastewater through anaerobic-aerobic microorganism; Application (patent) numbers 201210108044.7 relates to a kind of livestock and poultry sewage aerobic-anaerobic-aerobic immobilized microorganism biochemical device; Application (patent) numbers 201210240178.4 discloses a kind of method of utilizing facultative aerobic membrane bioreactor to process livestock breeding wastewater; Application (patent) numbers 201110174168.0 relates to a kind of method of processing livestock and poultry cultivation anaerobically fermenting natural pond liquid with SBR pond.
Waste water of livestock poultry still contains higher nitrogen and phosphorus after the biological treatment of conventional anaerobic-aerobic, is difficult to reach corresponding emission standard.If adopt physical chemistry measure intensifying treatment effect, can cause high cost.Artificial swamp is a sewage disposal technology that economical efficiency is high, practical, has stable effluent quality, treatment effect is good, capital construction working cost is low, be easy to the advantages such as maintenance, anti impulsion load.The feature of artificial swamp can make up the limitation of aquaculture just, and therefore artificial swamp is also applied to breeding wastewater processing.Artificial swamp mainly by precipitation, absorption, obstruct, microbial assimilation decompose, the approach removal Pollutants in Wastewater such as nitrated, denitrification and plant absorptions etc.As application (patent) numbers 201310290777.1 relates to a kind of artificial wet land system of removing microbiotic and antibiotics resistance gene in breeding wastewater of strengthening; Application (patent) numbers 201010122812.5 discloses a kind of constructed wetland plant in the application of processing in livestock breeding wastewater.
As the important component part of artificial swamp, filler is for plant and microorganism provides growth medium, for sewage seepage flow provides good hydraulics, also can be by directly removal pollutent of the effects such as filtration, absorption and precipitation.Traditional Performance of Constructed Wetlands Substrates (as soil, sand, gravel etc.) absorption property is poor, is unfavorable for keeping whole artificial wet land system treatment effect continual and steady.A lot of high-efficiency artificial fillers are used to replace traditional Performance of Constructed Wetlands Substrates in recent years, obtain good treatment effect.As application (patent) numbers 201110313868.3 discloses a kind of spherical haydite matrix for constructed wetland and preparation method thereof; Application (patent) numbers 201210387343.9 utilizes kaolin, gac etc. to prepare dephosphorization adsorbent and is applied to artificial swamp; Application (patent) numbers 201210068231.7 relates to a kind of artificial wet land system taking extra large oyster shell-useless fragment of brick-zeolite as compounded mix.
From above-mentioned analysis, selecting high performance material to process breeding wastewater as filler for artificial swamp will be a kind of development trend.Waterworks sludge is to the safe secondary product in water treatment procedure, mainly by iron-aluminium oxide (oxyhydroxide) or CaCO 3and the composition such as impurity in gac and former water; Have specific surface area large, iron aluminium content is high, and the pollutents such as phosphorus is had to the feature of stronger adsorptive power.Therefore, waterworks sludge can be back in artificial wet land system and remove the pollutent such as organism in breeding wastewater, nitrogen phosphorus, realize the object of " waste recycling ".
Summary of the invention
1. goal of the invention
Patent of the present invention is for for existing breeding wastewater treatment technology deficiency, proposes the method for a kind of reuse waterworks sludge as Performance of Constructed Wetlands Substrates processing breeding wastewater.
2. technical scheme
1) water supply plant dewatered sludge is carried out to natural air drying, fragmentation, choose particle diameter at the particle of 1~2cm as Performance of Constructed Wetlands Substrates.
2) artificial swamp building be vertically under to stream, comprise bottom stage and upper segment, be equipped with water inlet in bottom stage and upper segment;
3) clean stone grain is packed in the pillar of bottom stage;
4) micro porous aeration head being connected with air compressor is put on bottom stage stone grain;
5) by step 1) in waterworks sludge be filled in upper segment pillar;
6) breeding wastewater is passed into step 5) in the artificial swamp that builds, in system, intake pump, air compressor and wet-pit, by timing register control, can be realized water inlet on time, aeration and draining, breeding wastewater is discharged after artificial swamp is processed.
Advantage of the present invention and novelty are embodied in:
1) raw material waterworks sludge of the present invention, belongs to a kind of safe secondary product, have distribution extensively, easily obtain, the advantage such as low cost;
2) the present invention adopt simulator technique simple, cost is low, easy to operate.
3) the present invention utilizes waterworks sludge to process breeding wastewater as Performance of Constructed Wetlands Substrates, is conducive to realize the target of " treatment of wastes with processes of wastes against one another ", has reduced the cost of disposal of waste, meets the demand for development of recycling economy.
Brief description of the drawings
Fig. 1 is the schematic diagram of the vertical current constructed wetland based on waterworks sludge structure in the embodiment of the present invention;
The processing efficiency figure of the artificial swamp building in Fig. 2 embodiment of the present invention to COD in breeding wastewater;
The processing efficiency figure of the artificial swamp building in Fig. 3 embodiment of the present invention to ammonia nitrogen in breeding wastewater;
The processing efficiency figure of the artificial swamp building in Fig. 4 embodiment of the present invention to total nitrogen in breeding wastewater;
The processing efficiency figure of the artificial swamp building in Fig. 5 embodiment of the present invention to total phosphorus in breeding wastewater.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
Taking the waste sludge of certain water treatment plant as raw material, in this mud, the content of iron and aluminium is respectively 100 and 50mgg -1, specific surface area is 78.8m 2g -1.After waterworks sludge mummification, fragmentation, choose the particle of particle diameter 1~2cm as the packing material of artificial swamp.Artificial swamp is made up of polyethylene post, and column internal diameter is 9cm, height 80cm, and the bottom stage that clean stone grain is filled into pillar is as supporting layer, and loading is highly 10cm; Then load upper segment, filler floor height 60cm (Fig. 1) with ready waterworks sludge.The quality of filling waterworks sludge is 2.85kg (water ratio is 10.82%), and the effective volume V of artificial swamp is 1.8L, and porosity is 40%.Artificial swamp adopts segmental influent and intermittent aeration mode to move, by intake pump, wet-pit and timing register control Inlet and outlet water flow and time; Air compressor carries out intermittent aeration by timing register control to system.Breeding wastewater enters artificial swamp by intake pump from upper strata, system 3 circulations every day, and each circulation divides 3 stages water inlet (water inlet ratio is 60%, 30%, 10%), and every 160min enters water one time; Each circulation water inlet 0.2L, therefore flooding velocity is 0.6Ld -1, hydraulic detention time is 3d.Each cyclic aeration 80min simultaneously, makes reactor keep anoxic/aerobic state.The every 8h draining of system once, each draining 0.2L.Breeding wastewater is taken from certain cattle farm, after suitable dilution as the water inlet of artificial swamp, the concentration of COD, ammonia nitrogen, total nitrogen and total phosphorus in periodic measurement Inlet and outlet water.Breeding wastewater can effectively be removed the pollutent such as organism, nitrogen phosphorus in waste water through artificial swamp.
As shown in Figure 2, vertical current constructed wetland raises gradually and tends towards stability the clearance of COD in breeding wastewater, and clearance scope is between 80%-88%.Ammonia nitrogen average removal rate reaches more than 90% (Fig. 3), and the clearance of total nitrogen can reach 75%-89% (Fig. 4).The clearance of total phosphorus rises rapidly, then tends to balance gradually, and clearance is stable higher than 95% (Fig. 5).Visible under system operational conditions, the present invention shows good COD, nitrogen phosphorus removal effect to breeding wastewater.
It is emphasized that; although above-described embodiment is to the present invention's detailed explanation of contrasting, these explanations are just illustrative to the present invention, instead of restriction to invention; any innovation and creation that do not exceed in connotation of the present invention, within all dropping on rights protection scope of the present invention.

Claims (5)

1. one kind builds the method for vertical current constructed wetland processing breeding wastewater based on waterworks sludge, it is characterized in that following steps: using waterworks sludge after air-dry fragmentation as filler, be applied in vertical current intermittent aeration artificial swamp and process high-concentration culture waste water.
2. the method for processing breeding wastewater according to claim 1, is characterized in that the filler adopting is water supply plant waste sludge.
3. the method for processing breeding wastewater according to claim 1, is characterized in that artificial swamp discontinuous aeration, for system provides the reaction conditions of aerobic/anoxic.
4. the method for processing breeding wastewater according to claim 1, segmental influent in the artificial swamp that it is characterized in that building.
5. the method for processing breeding wastewater according to claim 1, is characterized in that intake pump in system, air compressor and wet-pit, by timing register control, can realize water inlet on time, aeration and draining.
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CN104085993A (en) * 2014-08-01 2014-10-08 袁珩 Artificial wetland device
CN104085992A (en) * 2014-08-01 2014-10-08 袁珩 Wastewater treatment process with solar energy heat preservation effect
CN104098186A (en) * 2014-08-01 2014-10-15 安庆庆荣企业管理咨询有限责任公司 Immobilized microorganism waste water treatment process
CN105174626A (en) * 2015-09-18 2015-12-23 山东大学 Constructed wetland coupled biological reaction tank purification water-gas system
CN105858870A (en) * 2016-06-08 2016-08-17 中国水利水电科学研究院 Biological aerated filter treatment system with automatic control function
CN106540650A (en) * 2016-10-20 2017-03-29 北京师范大学 A kind of preparation method of waterworks sludge base dephosphorization granule adsorbent
WO2020015458A1 (en) * 2018-07-17 2020-01-23 厦门理工学院 Treatment method for waste water from livestock and poultry

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CN104085993A (en) * 2014-08-01 2014-10-08 袁珩 Artificial wetland device
CN104085992A (en) * 2014-08-01 2014-10-08 袁珩 Wastewater treatment process with solar energy heat preservation effect
CN104098186A (en) * 2014-08-01 2014-10-15 安庆庆荣企业管理咨询有限责任公司 Immobilized microorganism waste water treatment process
CN104085992B (en) * 2014-08-01 2015-12-02 新昌县镜岭镇柳良轴承厂 A kind of sewage treatment process with warming solar energy effect
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CN105174626A (en) * 2015-09-18 2015-12-23 山东大学 Constructed wetland coupled biological reaction tank purification water-gas system
CN105858870A (en) * 2016-06-08 2016-08-17 中国水利水电科学研究院 Biological aerated filter treatment system with automatic control function
CN105858870B (en) * 2016-06-08 2019-02-01 中国水利水电科学研究院 A kind of aeration biological filter chamber treatment system with automatic control
CN106540650A (en) * 2016-10-20 2017-03-29 北京师范大学 A kind of preparation method of waterworks sludge base dephosphorization granule adsorbent
WO2020015458A1 (en) * 2018-07-17 2020-01-23 厦门理工学院 Treatment method for waste water from livestock and poultry

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