CN110272123A - A method of immobilized algal-bacteria syntaxial system denitrogenation dephosphorizing efficiency is improved with inorganic carbon source - Google Patents
A method of immobilized algal-bacteria syntaxial system denitrogenation dephosphorizing efficiency is improved with inorganic carbon source Download PDFInfo
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- CN110272123A CN110272123A CN201910594973.5A CN201910594973A CN110272123A CN 110272123 A CN110272123 A CN 110272123A CN 201910594973 A CN201910594973 A CN 201910594973A CN 110272123 A CN110272123 A CN 110272123A
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
- C02F3/322—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae use of algae
- C02F3/325—Biological 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
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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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
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/06—Nutrients for stimulating the growth of microorganisms
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Biological Treatment Of Waste Water (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention discloses a kind of bioremediations that town sewage denitrogenation dephosphorizing is improved with inorganic carbon source, belong to technical field of sewage.This method, which is chosen, identifies that from the advantage algae of urban wastewater treatment firm be algae source, using urban wastewater treatment firm activated sludge as bacterium source, elastic solid filler is used to form immobilized algal-bacteria syntaxial system for immobilization filler.Pass through additional inorganic carbon source NaHCO3And filler and device volume ratio are controlled as 1/3 ~ 1, NaHCO3The condition that initial concentration is 75 ~ 175mg/L handles town sewage.Ammonia nitrogen (NH in town sewage after processed by the invention4 +- N), total nitrogen (TN), total phosphorus (TP) and COD (CODCr) it can reach level-one A standard in China's urban wastewater treatment firm pollutant emission standard.
Description
Technical field
The invention belongs to technical field of sewage, and in particular to a kind of denitrification and dephosphorization method of town sewage.
Background technique
With Chinese society expanding economy, quantity of wastewater effluent increases year by year, and the environmental pollution as caused by sewage discharge is asked
Topic is got worse, and how to be protected water resource and is had become for current important one of environmental problem.
In face of the severe situation of water prevention and cure of pollution, China has promulgated " water prevention and cure of pollution action plan " to accelerate town sewage
The construction for the treatment of facility and mention mark transformation, this in the works clear stipulaties in the area of the water quality requirements sensitivities such as the lake (reservoir) of emphasis
The sewage of domain discharge, water quality must reach level-one emission standard A in China's urban wastewater treatment firm pollutant emission standard
(GB18918-2002).
Currently, China's urban wastewater treatment firm mainly use using A/A/O(anaerobism-and oxygen-it is aerobic) and oxidation ditch as representative
Active sludge biological denitrification dephosphorization technique.In view of the generally existing water inlet organic carbon content of China's town sewage, low, carbon/nitrogen is not up to
To the suitable requirement of active sludge biological method denitrogenation dephosphorizing, to reach level-one emission standard A, water factory generally takes additional grape
The mode of the organic carbon sources such as sugar promotes carbon/nitrogen, be easy to cause secondary pollution and increases processing cost.
Algaebacteria symbiotic system be it is a kind of can efficiently go to denitrogenate, phosphorus and CODCrAnd operating cost is low, without secondary pollution new
Type sewage treatment process.The advantage of the technique is that CO is easily absorbed and utilized in algae2Etc. inorganic carbon carry out photosynthesis, algae generate
O2It can be supplied to bacterial growth again and form syntaxial system, thus the technique based on algaebacteria symbiotic system is more conducive to nitrogen phosphorus ligands, fortune
Row cost is also lower compared with activated sludge system.If Ma Ruiyang et al. is found through experiments that, immobilized algal-bacteria syntaxial system compared to
For single algae and single thallus system, Nitrogen/Phosphorus Removal is optimal, and (Ma Ruiyang etc., algae-bacterium is single and cogeneration system supports seawater
Grow the catharsis [J] of tail water, Chinese aquatic science, 2019,26 (3): 1-11.)；Wang Aili et al. utilizes verdigris micro-capsule
Algae and bacterial treatment sewage, discovery immobilization mixed algae thallus system are apparently higher than the nitrogen in sewage, phosphorus ligands efficiency individually solid
Surely change system, and with the extension of time, the removal effect of nitrogen, phosphorus gradually rises (Wang Aili etc., phycomycete mixed immobilization
And its purification [J] to sewage, Environmental Pollution and Control, 2005,27 (9): 654-657.).
Summary of the invention
The present invention improves a kind of method based on immobilized algal-bacteria syntaxial system denitrogenation dephosphorizing with inorganic carbon source, to
It solves to cause secondary pollution and out shipwreck since carbon source deficiency need to add organic carbon source when sewage treatment plant handles actual waste water
The problem of to reach urban wastewater treatment firm pollutant level-one emission standard A (GB18918-2002).
In order to realize the purpose, the technical scheme is that
A method of immobilized algal-bacteria syntaxial system denitrogenation dephosphorizing being improved with inorganic carbon source, the steps include:
(1) using polymerase chain reaction-deformation gradient gel electrophoresis method to urban wastewater treatment firm organism in water group into
Row identification, using the algae identified as algae source, using activated sludge as bacterium source；
(2) the initial total biological dry weight concentration of control is 0.2 ~ 0.4g/L, and algae, bacterium are pressed the optimal dry weight of wastewater treatment efficiency
Mass ratio is added in beaker and algae, bacterium is fixed on elastic solid filler；
(3) light source is added to beaker, control brightness time ratio is 12h:12h, 4000 ~ 6000lx of intensity of illumination；
(4) urban wastewater treatment firm sewage, 6 ~ 12h of sewage hydraulic detention time are added into beaker；
(5) inorganic carbon source is added into beaker.
Further, step (1) algae source preferably readily the Oedogonium der Pilz of apposition growth, bacterium source be domestication after city
The activated sludge of town sewage treatment plant aerobic tank；
Further, elastic solid filler and reaction unit volume ratio are 1:1 in step (2) phycomycete immobilization；
Further, step (5) the inorganic carbon source is NaHCO3。
The present invention has the advantages that
(1) carbon source selected by is inorganic carbon source, can be effectively controlled the pH in water environment in immobilized algal-bacteria system to tie up
The stability of syntaxial system is held, and avoid organic carbon source in traditional wastewater treatment plant adds caused secondary pollution.
(2) this algaebacteria symbiotic system pollutes the nitrogen phosphorus etc. in sewage compared to the additional organic carbon source sodium acetate of traditional handicraft
Object has better removal effect.Under suitable carbon source supplement, ammonia nitrogen (NH in town sewage after processing4 +- N), total nitrogen (TN),
Total phosphorus (TP), COD (CODCr) index reaches urban wastewater treatment firm pollutant level-one emission standard A (GB18918-
2002).
(3) phycomycete immobilization handles sewage, and phycomycete not easily runs off, and ensures processing effluent quality, and it is raw to be conducive to algae, bacterium
The recycling of substance provides condition for the recycling of biomass energy after processing, and engineering is good with prospect.
Specific embodiment
Embodiment 1
From certain sewage treatment plant inflow mouth water sampling, choose advantage algae short strip sheath algae in the water factory (Oedogonium brevicingulatum) be immobilized algal-bacteria system algae source.Short strip sheath algae dry weight determines method are as follows: with drying in advance
One group of different volumes of quantitative filter paper sifting weighing short strip sheath algae, first weigh and determine this group of short strip sheath algae weight in wet base quality respectively,
Then this group of algae is placed in 103 ± 1 DEG C of baking ovens and is toasted, drying weighs repeatedly, determines dry weight.With algae weight in wet base for horizontal seat
Mark, dry weight are that ordinate draws short strip sheath algae dry and wet series of fortified passes system standard curve.It, can be by certain weight in wet base quality according to standard curve
Short strip sheath algae is converted into dry weight.
Bacterium dry weight determines method: it is accurate to measure 100mL activated sludge, it is filtered with weighed quantitative filter paper is dried in advance,
Filtered activated sludge is placed in 103 ± 1 DEG C of baking ovens together with filter paper again and is toasted, drying weighs repeatedly, determine its dry weight,
Thus bacterium dry weight can be calculated.2L glass beaker 3 are taken, is placed on six magnetic stirring apparatus, filling 15 ~ 20cm elasticity is vertical
Body filler, volumetric filling ratio 50% ~ 80% arrange common 25 watts of fluorescent tubes 2 ~ 3,4000 ~ 60001x of intensity of illumination around beaker,
Brightness time ratio 12h:12h, initial total biological dry weight concentration 0.3g/L, algae dry weight: bacterium dry weight is 3:1, is exposed
Tolerance is 0.2L/min, and the aeration intermittent time is 6h/6h, is glucose, sodium acetate and NaHCO according to additional carbon3Three
Corresponding carbon source is added in experimental group, and the town sewage plant sewage of 2L is added in each beaker, wherein containing NH4 +- N:18.5mg/L, TN:
25.8mg/L,TP:1.4mg/L,CODCr: 126mg/L, pH:6.98, water temperature: 25 ± 5 DEG C, overall process magnetic agitation, rotor speed
Control is precipitated in beaker bottom without algae and bacterium.With NH4 +-N、TN、TP、CODCrIt for monitoring index, is handled through 12h, additional carbon is
NaHCO3Experimental group, treated water outlet in NH4 +-N、TN、TP、CODCrReach urban wastewater treatment firm pollutant emission mark
Pseudo-first-order A standard (GB18918-2002).
Each substance removal rate and processing time in 1 embodiment 1 of table
Embodiment 2
Algae source screening in sewage, the determination of phycomycete dry weight, algae, bacterium dry weight ratio, aeration quantity, aeration interval in the present embodiment
The setting of time and experiment condition is same as Example 1, and sewage quality NH is added in each beaker4 +- N:20.4mg/L, TN:
29.3mg/L, TP:1.2 mg/L, CODCr: 138mg/L, pH:7.06, water temperature: 25 ± 5 DEG C.It is handled through 12h, additional NaHCO3
Concentration is the experimental group of 100 ~ 125mg/L, and treated simulates NH in sewage4 +-N、TN、TP、CODCrReach at town sewage
Factory's pollutant emission standard (GB18918-2002) the level-one A standard of managing.
Each substance removal rate and processing time in 2 embodiment 2 of table
By embodiment 1,2 as can be seen that compared to the additional organic carbon source sodium acetate in traditional handicraft, immobilized algal-bacteria symbiosis
In system, using additional inorganic carbon source NaHCO3Method can effectively improve town sewage Nitrogen/Phosphorus Removal, and avoid
The drawbacks of secondary pollution, and condition needed for sewage disposal process is simple, and engineer application exploitativeness is strong.
Embodiment 3
Algae source screening in sewage, the determination of phycomycete dry weight, algae, bacterium dry weight ratio, aeration quantity, aeration interval in the present embodiment
The setting of time and experiment condition is same as Example 1, and sewage quality NH is added in each beaker4 +-N: 19.1mg/L,TN:
26.6mg/L, TP:1.4mg/L, CODCr: 100mg/L, pH:7.06, water temperature: 25 ± 5 DEG C.Handled through 12h, filler with react dress
Setting volume ratio is the experimental group of 1:1 to NH4 +-N、TN、TP、CODCrRemoval effect be substantially better than other experimental groups.
Each substance removal rate and processing time in 3 embodiment 3 of table
Claims (3)
1. a kind of method for improving immobilized algal-bacteria syntaxial system denitrogenation dephosphorizing with inorganic carbon source, which is characterized in that institute is additional
Carbon source be sodium bicarbonate (NaHCO3).
2. the method according to claim 1, wherein NaHCO3Dosage be 100 ~ 125mg/L.
3. the method according to claim 1, wherein filler and reaction unit volume ratio are 1:1.
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