CN2649583Y

CN2649583Y - Aerobic-anaerobic two-purpose waste water treating apparatus

Info

Publication number: CN2649583Y
Application number: CNU032490631U
Authority: CN
Inventors: 吴静; 陆正禹
Original assignee: Tsinghua University
Current assignee: Tsinghua University
Priority date: 2003-09-26
Filing date: 2003-09-26
Publication date: 2004-10-20
Anticipated expiration: 2013-09-26

Abstract

The aerobic and anaerobic dual-purpose biological treatment system of wastewater includes an anaerobic up flow reactor. At the bottom of the reactor is an air-blast-head and air inlet pipe. The air-blast-head is connected with the gas compressor through the air inlet pipe. The compressor is respectively connected with the gas tank or a nitrogen tank that is full of air or oxygen through a valve and the air inlet pipe. The air outlet pipe at the top of the reactor is connected with the biogas mine. The biogas mine is connected with the compressor through the pipelines and the valve. The utility model can achieve aerobic and anaerobic operations under that condition that the structure of the reactor is not changed, which is not only flexible and steady during use and also has a small floor space and a fast start. The utility model can be applied to process wastewater of low, middle and high concentration, which is applied to the great variation of the wastewater quality and the water quantity out of the fast upgrade of products and yield fluctuation in China. The utility model improves the phenomenon that most of the environment protection device leave unused and eliminated.

Description

A kind of aerobic/the dual-purpose wastewater treatment equipment of anaerobism

Technical field

The utility model relates to a kind of organic waste water biological treating equipment, particularly the structure design of internal-circulation anaerobic reactor and internal circulating anaerobic expanded bed/fluidized-bed reactor.

Background technology

The processing of organic waste water is always based on biological treatment.Biological treatment can be divided into aerobe and handle and anaerobic biological treatment its characteristics and range of application such as table 1 separately.As shown in Table 1, it is good that aerobic biological treatment process has an effluent quality, when handling low-concentration organic waste water, and the advantage that processing costs is lower; Anaerobic treatment process can produce the methane recovery bioenergy, and when handling middle and high concentration organic waste water, processing cost is low.Anaerobic treatment respectively has multiple reactor types and different operation scheme with aerobic treatment.In the practice, usually according to the definite biological treatment mode that is suitable for of the practical situation of waste water.

Table 1. is aerobic, the comparison of anaerobic biological treatment technology

Technology	Aerobe is handled	Anaerobic biological treatment
Technology	Aerobe is handled	Anaerobic biological treatment	Aeration whether	Be	Not
Whether produce biogas	Not	Be	Aeration whether	Be	Not
Whether produce biogas	Not	Be	Effluent quality	Effluent COD concentration reaches below 60 mg/litre	Water outlet in COD concentration more than the hundreds of mg/litre
Working cost	It is following more cheap than anaerobic biological treatment to handle COD concentration 800-1000mg/l	It is above more cheap than the aerobe processing to handle COD concentration 800-1000mg/l	Effluent quality	Effluent COD concentration reaches below 60 mg/litre
Working cost			Applicable object	Low-concentration organic waste water	Middle and high concentration organic waste water

Bio-reactor has multiple structure formation at present, comprises upflow-type reactor, falls flow reactor and complete mixing reactor etc., and wherein upflow-type reactor is the main flow form of present high-efficient biological reactor.The anaerobism upflow-type reactor comprises flow lifting type anaerobic sludge layer reactor (being the UASB reactor), anaerobic fluidized bed reactor, CGSB, internal-circulation anaerobic reactor etc., and wherein the UASB reactor is present most widely used anaerobic reactor.

Internal-circulation anaerobic reactor is one of the highest anaerobic reactor of present usefulness, as shown in Figure 1.Internal-circulation anaerobic reactor utilizes two-layer triphase separator that reaction zone is divided into first reaction zone and second reaction zone, is removed at the most of organism of first reaction zone, and second reaction zone is the precision processing section, the operation stability of two reaction zones series connection enhancing reactor.Its internal circulation system comprises upspout and falls the stream pipe that utilize biogas that the segment fluid flow of first reaction zone is risen in the gas-liquid separator, after biogas was overflowed, fluid was got back to reactor bottom under action of gravity, formed the circulation of reactor inner fluid.It is for overcoming the internal-circulation anaerobic reactor complex structure, easily take place to stop up and the granule sludge subsidence rate is lower, the raising of the liquid phase upflow velocity that limited reaction zone that China's utility model patent (ZL02282323.9) discloses a kind of " internal circulating anaerobic expanded bed/fluidized-bed reactor " (shown in Figure 2), thereby influences the further raising of organic loading and the modified version reactor that proposes.Their common feature is to have first reaction zone and two reaction zones of second reaction zone, and first reaction zone is the place of most of organic matter degradation, and second reaction zone is the precision processing section, the operation stability of two reaction zones series connection enhancing reactor; Its internal circulation system comprises upspout and falls stream pipe (district), utilizes biogas that the segment fluid flow of first reaction zone is risen in the gas-liquid separator, and after biogas was overflowed, fluid was got back to reactor bottom under action of gravity, forms the circulation of reactor inner fluid.Internal recycle can be strengthened the mass transfer between organism and granule sludge; The dilution water inlet, the ability of raising reactor anti-shock loading; Backflow basicity reduces running cost.Above-mentioned two kinds of reacting appliances have following advantage: 1. efficient.The organic loading of this two reactor is about 4 times of UASB reactor when handling similar waste water, and during intermediate concentration organic waste waters such as brewery wastewater treatment, volumetric loading can reach 20kgCOD/ (m ³D) about.2. initial cost is economized, takes up an area of few.Required useful volume only is about 1/4 of a UASB reactor, adopts the tower reactor of tall and thin type more, and aspect ratio is 4-8, is particularly suitable for the enterprise of land used anxiety.3. capacity of resisting impact load is strong, good operation stability.

Above-mentioned two kinds of anaerobic reactors generally are fit to handle the organic waste water of middle and high concentration.When being used for low-concentration organic waste water and handling because the biogas amount that produces is less, internal recycle can not form or the internal recycle amount too small, reactor can not normally move.These two kinds of reactors because it is also lower to produce the biogas amount, also are subjected to the puzzlement of the problems referred to above between the starting period, cause the starting period longer." three simultaneously " policy of aspect environment protection, carrying out of China in addition; require enterprise when building production line, just to build Sewage treatment systems; but enterprise product renewal now is fast, harvest fluctuation is big; so the sewage quality that enterprise produces, water yield change are comparatively fast; and the general environmental protection facility scope of application is narrower; do not catch up with and produce variation, cause the water processing establishment fallback, vacancy rate and mortality are very high.

The utility model content

The purpose of this utility model is at the deficiencies in the prior art and defective, propose a kind of aerobic/the dual-purpose Waste Water Treatment of anaerobism, this system not only starts soon, and scope of application broad, the organic waste water that existing installation just goes for handling high, medium and low concentration need be do not changed, thereby the construction investment and the running cost of enterprise can be effectively reduced.

The technical solution of the utility model is as follows: a kind of aerobic/the dual-purpose Waste Water Treatment of anaerobism, comprise the anaerobism upflow-type reactor, it is characterized in that: be provided with aeration head and inlet pipe at described reactor bottom, aeration head links to each other with gas compressor by inlet pipe; Described compressor is connected with gas tank that air or oxygen is housed or nitrogen pot with inlet pipe by valve respectively; Described reactor head links to each other with the biogas cabinet by escape pipe, and this biogas cabinet links to each other with gas compressor with valve by pipeline.

Anaerobism upflow-type reactor described in the utility model can adopt flow lifting type anaerobic sludge layer (UASB) reactor, internal-circulation anaerobic reactor or internal circulating anaerobic expanded bed/fluidized-bed reactor.

The utlity model has following advantage and high-lighting effect: 1. under anaerobic, variation according to influent quality, by the size that starts aerating apparatus and regulate aeration rate, handle the organic waste water of basic, normal, high concentration efficiently, enlarged the scope of application of UASB reactor, internal-circulation anaerobic reactor and internal circulating anaerobic expanded bed/fluidized-bed reactor; 2. do not make under the situation of any change at structure of reactor, system can move by aerobic or anaerobic mode, and when waste water became low concentration wastewater by middle and high concentration, aerobic mode can make that this reactor can more economical effective operation.3. can adapt to wastewater discharge standard changes.Owing to after the conversion to the production of other goods, carry out different industry emission standards, transfer aerobic mode to by the anaerobism mode and move, effluent quality is good, reaches more strict emission control standards easily.Owing to have above-mentioned three characteristics, the dual-purpose Waste Water Treatment of aerobic/anaerobism can adapt to the present enterprise product of China and upgrade the national conditions fast, that change of production is big, go for the processing of basic, normal, high concentration organic waste water, thereby improve the idle and high situation of mortality of environmental protection facility.4. can control owing to the internal recycle situation, and can be by having carrier and DNAcarrier free mode to move, so internal-circulation anaerobic reactor and internal circulating anaerobic expanded bed/fluidized-bed reactor flexible operation start rapidly.5. the dual-purpose technology of aerobic/anaerobism is the main body reactor if adopt internal-circulation anaerobic reactor or internal circulating anaerobic expanded bed/fluidized-bed reactor, then technology has kept internal-circulation anaerobic reactor and internal circulating anaerobic expanded bed/fluidized-bed reactor efficient height, stable, advantages such as reduced investment, when intermediate concentration organic waste waters such as brewery wastewater treatment, volumetric loading can reach 20kgCOD/ (m ³D) about, during low-concentration organic waste waters such as processing hospital sewage, municipal effluent, volumetric loading can reach 6kgCOD/ (m ³D) about.

Description of drawings

Fig. 1 is the structural representation of the internal-circulation anaerobic reactor that uses in the prior art.

Fig. 2 is the structural representation of internal circulating anaerobic expanded bed/fluidized-bed reactor in the prior art.

What Fig. 3 provided for the utility model is the synoptic diagram of the embodiment of example with internal circulating anaerobic expanded bed/fluidized-bed reactor.

Among the figure: the 1-water inlet pipe; 2-first reaction zone; The 3-triphase separator; The 4-upspout; 5-gas-liquid separator (district); 6-second reaction zone; Stream pipe (district) falls in 7-; The 8-settling region; The 9-rising pipe; The 10-escape pipe; The 11-baffle plate; The 12-carrier adds inlet; The 13-aeration head; The 14-inlet pipe; The 15-gas compressor; The 16-valve; 17-biogas cabinet; The total escape pipe of 18-; The 19-valve; The 20-nitrogen pot; The 21-valve; 22-is equipped with the gas tank of air or oxygen; 23-is aerobic/the dual-purpose inner circulation reactor of anaerobism.

Embodiment

Further specify concrete structure of the present utility model, working process and preferred forms below in conjunction with accompanying drawing.

The structure of aerobic/dual-purpose biological treatment of waste water system of anaerobism that the utility model provides as shown in Figure 3, system mainly comprises the dual-purpose inner circulation reactor 23 of aerobic/anaerobism, the aeration head 13 that is arranged on reactor bottom, gas compressor 15, biogas cabinet 17, nitrogen pot 20 and air vessel or oxygen canister 22.The carrier of rising pipe 9, biogas pipe 10 and the first reaction zone middle and upper part that this reactor comprises first reaction zone 2, second reaction zone 6, upspout 4, fall stream district 7, settling region 8 and gas-liquid separation zone 5 and be arranged on water inlet pipe 1, the top of reactor bottom adds inlet 12.The described gas-liquid separation zone 5 and second reaction zone 6 are built jointly, and its top part is as gas-liquid separation zone 5; Be provided with baffle plate 11 between described second reaction zone 6 and the settling region 8, establish triphase separator 3 on first reaction zone, 2 tops, upspout 4 is established at the triphase separator top; The described stream district 7 of falling is made of the annular space between the first reaction zone outer wall and the reactor outer wall.Aeration head 13 links to each other with gas compressor 15 by inlet pipe 14; Described compressor 15 is connected by inlet pipe 14 and

valve

19,21 and nitrogen pot 20 or gas tank 22 that air or oxygen is housed respectively; The escape pipe 10 of described reactor head links to each other with biogas cabinet 17 by pipeline, and this biogas cabinet 17 links to each other with compressor 15 with valve 16 by pipeline 14.

The working process of aerobic/dual-purpose biological treatment of waste water system of anaerobism that the utility model provides is as follows:

When moving by the anaerobism mode: waste water is entered first reaction zone 2 and the abundant contact reacts of anaerobic sludge of the dual-purpose inner circulation reactor 23 of aerobic/anaerobism by the water inlet pipe 1 of the dual-purpose inner circulation reactor 23 of aerobic/anaerobism, most of organism is converted into biogas in the waste water, biogas is collected by triphase separator 3, enter gas-liquid separation zone 5 by upspout 4, when biogas rises the part waste water in first reaction zone 2 is brought in the gas-liquid separation zone 5, the biogas of effusion is discharged by biogas pipe 10.Another part waste water of second reaction zone 6 can be back to first reaction zone 2 along falling stream district 7 automatically, forms internal recycle.Second reaction zone, 6 part waste water enter settling region 8, after solid-liquid separation, are discharged by rising pipe 9.Reactor can be cultivated granule sludge, also can add inlet 12 from carrier and add the carrier operation.The biogas that produces enters biogas cabinet 17 by biogas pipe 10.When reactor start-up or in the reactor for treatment, during low-concentration organic waste water, inlet pipe 14 can feed by gas compressor 15 and squeeze into the biogas that nitrogen or reactor self produce, to guarantee that internal recycle forms and the internal recycle amount is enough big.Concrete mode is: adopt when squeezing into biogas, Open valve 16, valve-off 19 and 21, the biogas in the biogas cabinet 17 after gas compressor 15 pressurizations by the bottom of aeration head 13 injecting reactors 23; When nitrogen is squeezed in employing, Open valve 19, valve-off 16 and 21, nitrogen is by nitrogen pot 20 bottom by aeration head 13 injecting reactors 23 after gas compressor 15 pressurizations.

Process when moving by aerobic mode and anaerobism mode operational process are basic identical.The key distinction is: Open valve 21, and valve-off 16 and 19, air or oxygen is by gas tank 22 bottom by aeration head 13 injecting reactors 23 after gas compressor 15 pressurizations.When adopting aerobic mode to move, give vent to anger and can directly discharge, need not pass through the biogas cabinet.When adopting aerobic mode to move, the process of air inlet is carried out all the time, and when adopting the anaerobism mode to move, air inlet is only carried out when starting or handle organic wastewater with medium-low concentration.

Claims

1. the dual-purpose Waste Water Treatment of aerobic/anaerobism comprises anaerobism upflow-type reactor (23), it is characterized in that: be provided with aeration head (13) and inlet pipe (14) at described reactor bottom, aeration head (13) links to each other with gas compressor (15) by inlet pipe; Described compressor (15) is connected with gas tank that air or oxygen is housed (22) or nitrogen pot (20) with inlet pipe by valve (19,21) respectively; Described reactor head links to each other with biogas cabinet (17) by escape pipe (10), and this biogas cabinet links to each other with gas compressor (15) with valve by pipeline.

2. according to the described Waste Water Treatment of claim 1, it is characterized in that: described anaerobism upflow-type reactor adopts a kind of in flow lifting type anaerobic sludge layer reactor, internal-circulation anaerobic reactor or the internal circulating anaerobic expanded bed/fluidized-bed reactor.