CN107162212B - Alanine wastewater treatment process - Google Patents
Alanine wastewater treatment process Download PDFInfo
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- CN107162212B CN107162212B CN201710412160.0A CN201710412160A CN107162212B CN 107162212 B CN107162212 B CN 107162212B CN 201710412160 A CN201710412160 A CN 201710412160A CN 107162212 B CN107162212 B CN 107162212B
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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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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- 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
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1278—Provisions for mixing or aeration of the mixed liquor
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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
- C02F2101/30—Organic compounds
- C02F2101/38—Organic compounds containing nitrogen
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/02—Temperature
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/10—Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/22—O2
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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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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Abstract
The invention discloses an alanine wastewater treatment process, which comprises the steps of treating alanine wastewater by a biological denitrification method, wherein an alanine wastewater treatment tank consists of a first aeration tank, a second aeration tank, a third aeration tank and a fourth aeration tank which are sequentially distributed in series and communicated pairwise, the concentration of the alanine wastewater is controlled to be 2000mg/L, the pH value is controlled to be 6.5-8, the temperature is controlled to be 30-38 ℃, and the concentration of sludge is controlled to be 5000 mg/L; starting the aeration blower, controlling the aeration valve to control the dissolved oxygen in the wastewater treatment tank to be 0.1-2.5mg/L, and adopting nitrifying bacteria as sludge filler. The method has the advantages of high alanine wastewater treatment efficiency, low capital investment and operation cost, convenient operation and management, wide application to various wastewater with high ammonia nitrogen content and strong impact resistance.
Description
Technical Field
The invention relates to the technical field of chemical sewage treatment, in particular to an alanine wastewater treatment process.
Background
With the rapid development of global industrialization and the continuous expansion of urban scale, the pollution of pollutants discharged in life and production processes to the water environment is becoming more and more serious, wherein nitrogen compounds from different sources have become one of the important pollutants of the water environment. A large amount of nitrogen compounds enter the water body environment, which causes the water body quality deterioration, affects the environmental quality of fishery, agriculture and cities and towns, and further affects the human health. The nitrogen in the sewage exists in the forms of ammonia nitrogen, organic nitrogen and nitrite nitrogen. Ammonia nitrogen in sewage is a product of microbial activity, and the amount of the ammonia nitrogen in the water is an index for measuring the degree of water pollution.
There are various methods for denitrogenating wastewater, such as stripping, neutralization, breakpoint chlorination, ion exchange, biochemical, etc. In practice, many biochemical methods are found to remove nitrogen, the removal rate of ammonia nitrogen can meet the requirement, but the wastewater generated by producing alanine by a fermentation method is high ammonia nitrogen wastewater, and the methods have strict treatment conditions for the high ammonia nitrogen wastewater, are complex to operate and require great capital investment. How to effectively treat high ammonia nitrogen alanine waste water, and not produce secondary pollution, can realize the comprehensive utilization of resources, is always the problem that technical personnel in the field need to solve urgently.
Disclosure of Invention
Aiming at the problems, the invention provides the alanine wastewater treatment process which has the advantages of low investment, good effect and simple and convenient operation in engineering application.
An alanine wastewater treatment process comprises the steps of treating alanine wastewater by a biological denitrification method, wherein an alanine wastewater treatment tank consists of a first aeration tank, a second aeration tank, a third aeration tank and a fourth aeration tank which are sequentially distributed in series and are communicated pairwise, the first aeration tank is provided with a water inlet and a sludge return port, and the fourth aeration tank is provided with a water outlet and a sludge discharge port; the aeration main pipeline is provided with four branch pipelines which respectively penetrate into the bottoms of the first aeration tank, the second aeration tank, the third aeration tank and the fourth aeration tank, and the aeration main pipeline is connected with an aeration blower; the concentration of the alanine wastewater is controlled to be 2000mg/L at 200-; starting the aeration blower, controlling an aeration valve to control the dissolved oxygen in the wastewater treatment tank to be 0.1-2.5mg/L, wherein the dissolved oxygen in the first aeration tank is controlled to be 0.1-0.5mg/L, the dissolved oxygen in the second aeration tank is controlled to be 0.5-1mg/L, the dissolved oxygen in the third aeration tank is controlled to be 1-1.7mg/L, and the dissolved oxygen in the fourth aeration tank is controlled to be 1.7-2.5 mg/L; the sludge filler adopts nitrobacteria.
Furthermore, the first aeration tank, the second aeration tank, the third aeration tank and the fourth aeration tank are communicated in an up-and-down staggered manner, the first aeration tank is communicated with the top of the second aeration tank, the second aeration tank is communicated with the bottom of the third aeration tank, and the third aeration tank is communicated with the bottom of the fourth aeration tank.
Further, the water inlet is arranged at the top of the first aeration tank, and the water outlet is arranged at the top of the fourth aeration tank.
Furthermore, the hydraulic retention time of the wastewater treatment pool is 50-70 hours.
Furthermore, the sludge discharge port is arranged at the bottom of the fourth aeration tank, and sludge is discharged by flocculation through a screw stacking machine.
Further, the sludge return port is arranged at the top of the first aeration tank and is flush with the water inlet, so that the sludge concentration of the aeration tank is kept within the range of 2000-5000mg/L, and the sludge is a nitrifying bacteria culture medium.
The invention has the beneficial effects that: the alanine wastewater treatment efficiency is high, the capital investment and the operating cost are saved, the operation management is convenient, the alanine wastewater treatment method can be widely applied to various wastewater with high ammonia nitrogen content, and the impact resistance is strong.
Drawings
FIG. 1 is a schematic view showing the structure of an alanine wastewater treatment tank in example 1.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
Example 1
An alanine wastewater treatment process comprises the steps of treating alanine wastewater by a biological denitrification method, wherein an alanine wastewater treatment tank consists of a first aeration tank, a second aeration tank, a third aeration tank and a fourth aeration tank which are sequentially distributed in series and are communicated pairwise, the first aeration tank 10 is provided with a water inlet 101 and a sludge return port, and the fourth aeration tank 40 is provided with a water outlet 401 and a sludge discharge port 402; the aeration main pipeline 50 is provided with four branch pipelines which respectively go deep into the bottoms of the first aeration tank, the second aeration tank, the third aeration tank and the fourth aeration tank, and the aeration main pipeline is connected with an aeration blower.
The first aeration tank, the second aeration tank, the third aeration tank and the fourth aeration tank are communicated in an up-and-down staggered manner, the first aeration tank 10 is communicated with the top of the second aeration tank 20, the second aeration tank 20 is communicated with the bottom of the third aeration tank 30, and the third aeration tank 30 is communicated with the bottom of the fourth aeration tank 40; correspondingly, the water inlet 101 and the sludge return port are arranged on the top of the first aeration tank 10 in a flush manner, and the water outlet 401 is arranged on the top of the fourth aeration tank 40; the sludge discharge port 402 is arranged at the bottom of the fourth aeration tank 40, and discharges sludge through flocculation by a spiral shell stacking machine.
The temperature is 32 ℃, the pH value is 7.1, the sludge concentration is 3300mg/L, the ammonia nitrogen concentration is 860mg/L alanine wastewater, the aeration blower is started, the aeration valve is controlled to control the dissolved oxygen in the wastewater treatment tank to be 0.1-2.5mg/L, wherein the dissolved oxygen in the first aeration tank 10 is controlled to be 0.2mg/L, the dissolved oxygen in the second aeration tank 20 is controlled to be 0.8mg/L, the dissolved oxygen in the third aeration tank 30 is controlled to be 1.5mg/L, and the dissolved oxygen in the fourth aeration tank 40 is controlled to be 2.2 mg/L; the sludge filler adopts nitrobacteria, and the hydraulic retention time is 50 hours.
Under the action of microorganisms under the anoxic condition, nitrite nitrogen is taken as an electron acceptor, ammonia nitrogen is taken as an electron donor, and the nitrite nitrogen and the ammonia nitrogen are simultaneously converted into N2The process of (1). First NO2 -Conversion to NH2OH, followed by H2OH as an electron acceptor to NH4 +Oxidation to hydrazine (N)2H4）；N2H4Conversion to N2And is N02 -Reduction to H2OH provides electrons.
Oxygen has an inhibitory effect, and microaerophilic conditions can completely inhibit, but the inhibitory effect is reversible; above 18% air saturation, the flora is not recoverable. The dissolved oxygen is most preferably in the range of 0.5-2 mg/L.
Through the treatment, the ammonia nitrogen in the alanine wastewater is reduced to 18mg/L from 860 mg/L.
Example 2
An alanine wastewater treatment process comprises the steps of treating alanine wastewater by a biological denitrification method, wherein an alanine wastewater treatment tank consists of a first aeration tank, a second aeration tank, a third aeration tank and a fourth aeration tank which are sequentially distributed in series and are communicated pairwise, the first aeration tank 10 is provided with a water inlet 101 and a sludge return port, and the fourth aeration tank 40 is provided with a water outlet 401 and a sludge discharge port 402; the aeration main pipeline 50 is provided with four branch pipelines which respectively go deep into the bottoms of the first aeration tank, the second aeration tank, the third aeration tank and the fourth aeration tank, and the aeration main pipeline is connected with an aeration blower.
The first aeration tank, the second aeration tank, the third aeration tank and the fourth aeration tank are communicated in an up-and-down staggered manner, the first aeration tank 10 is communicated with the top of the second aeration tank 20, the second aeration tank 20 is communicated with the bottom of the third aeration tank 30, and the third aeration tank 30 is communicated with the bottom of the fourth aeration tank 40; correspondingly, the water inlet 101 and the sludge return port are arranged on the top of the first aeration tank 10 in a flush manner, and the water outlet 401 is arranged on the top of the fourth aeration tank 40; the sludge discharge port 402 is arranged at the bottom of the fourth aeration tank 40, and discharges sludge through flocculation by a spiral shell stacking machine.
The temperature is 35 ℃, the pH value is 7.1, the sludge concentration is 3300mg/L, the ammonia nitrogen concentration is 1460mg/L alanine wastewater, the aeration blower is started, the aeration valve is controlled to control the dissolved oxygen in the wastewater treatment tank to be 0.1-2.5mg/L, wherein the dissolved oxygen in the first aeration tank 10 is controlled to be 0.3mg/L, the dissolved oxygen in the second aeration tank 20 is controlled to be 0.7mg/L, the dissolved oxygen in the third aeration tank 30 is controlled to be 1.5mg/L, and the dissolved oxygen in the fourth aeration tank 40 is controlled to be 2.4 mg/L; the sludge filler adopts nitrobacteria, and the hydraulic retention time is 60 hours.
Through the treatment, the ammonia nitrogen content in the alanine wastewater is reduced from 1460mg/L to 34 mg/L.
Finally, it should also be noted that the above list is only one specific embodiment of the invention. It is obvious that the invention is not limited to the above embodiments, but that many variations are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the present invention are to be considered within the scope of the invention.
Claims (1)
1. The alanine wastewater treatment process is characterized in that the alanine wastewater is treated by a biological denitrification method, and comprises the following steps: the alanine wastewater treatment tank consists of a first aeration tank, a second aeration tank, a third aeration tank and a fourth aeration tank which are sequentially distributed in series and communicated in pairs, wherein the first aeration tank is provided with a water inlet and a sludge return port, and the fourth aeration tank is provided with a water outlet and a sludge discharge port; the aeration main pipeline is provided with four branch pipelines which respectively penetrate into the bottoms of the first aeration tank, the second aeration tank, the third aeration tank and the fourth aeration tank, and the aeration main pipeline is connected with an aeration blower;
the concentration of the alanine wastewater is controlled to be 200-2000mg/L, the pH value is controlled to be 6.5-8, the temperature is controlled to be 30-38 ℃, and the sludge concentration is controlled to be 2000-5000 mg/L; starting the aeration blower, controlling an aeration valve to control the dissolved oxygen in the wastewater treatment tank to be 0.1-2.5mg/L, wherein the dissolved oxygen in the first aeration tank is controlled to be 0.1-0.5mg/L, the dissolved oxygen in the second aeration tank is controlled to be 0.5-1mg/L, the dissolved oxygen in the third aeration tank is controlled to be 1-1.7mg/L, and the dissolved oxygen in the fourth aeration tank is controlled to be 1.7-2.5 mg/L; the sludge filler adopts nitrobacteria;
the first aeration tank, the second aeration tank, the third aeration tank and the fourth aeration tank are communicated in a vertically staggered manner;
the first aeration tank is communicated with the top of the second aeration tank, the second aeration tank is communicated with the bottom of the third aeration tank, and the third aeration tank is communicated with the bottom of the fourth aeration tank;
the water inlet is arranged at the top of the first aeration tank, and the water outlet is arranged at the top of the fourth aeration tank;
the hydraulic retention time of the wastewater treatment pool is 50-70 hours;
the sludge discharge port is arranged at the bottom of the fourth aeration tank and discharges sludge through flocculation by a screw stacking machine;
the sludge return port is arranged at the top of the first aeration tank and is flush with the water inlet, so that the sludge concentration of the aeration tank is kept within the range of 2000-5000mg/L, and the sludge is a nitrobacteria culture medium;
under the action of microorganisms under the anoxic condition, nitrite nitrogen is taken as an electron acceptor, ammonia nitrogen is taken as an electron donor, and the nitrite nitrogen and the ammonia nitrogen are simultaneously converted into N2First of all NO2 -Conversion to NH2OH, followed by NH2OH as an electron acceptor to NH4 +Oxidation to hydrazine N2H4；N2H4Conversion to N2And is NO2 -Reduction to NH2OH provides electrons.
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| CN100457652C (en) * | 2005-12-26 | 2009-02-04 | 北京城市排水集团有限责任公司 | Five-factor wastewater treating apparatus |
| CN101195507A (en) * | 2007-12-13 | 2008-06-11 | 吴江市方霞企业信息咨询有限公司 | High ammonia nitrogen wastewater treatment |
| CN201330216Y (en) * | 2009-01-15 | 2009-10-21 | 彭永臻 | Apparatus for implementing sludge micro-swelling energy-saving method in biological denitrification technique |
| KR20130001066A (en) * | 2011-06-24 | 2013-01-03 | 주식회사 우일환경테크닉스 | Advanced wastewater treatment for biologically removing nitrogen and phosphorus using membrane atteched biofilms |
| CN202148221U (en) * | 2011-07-26 | 2012-02-22 | 成都市龙沣源环保科技有限责任公司 | Integrated A-O biological denitrification reactor with buffer zone |
| US9469558B2 (en) * | 2012-10-01 | 2016-10-18 | D.C. Water & Sewer Authority | Method and apparatus for maximizing nitrogen removal from wastewater |
| CN103880251B (en) * | 2014-03-27 | 2016-01-20 | 北京工业大学 | The A of a kind of short distance nitration coupling denitrification dephosphorization 2/ O-bio-contact oxidation method |
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