CN112142192A - Membrane-carried biological deodorization reactor and deodorization method - Google Patents
Membrane-carried biological deodorization reactor and deodorization method Download PDFInfo
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- CN112142192A CN112142192A CN202010936933.7A CN202010936933A CN112142192A CN 112142192 A CN112142192 A CN 112142192A CN 202010936933 A CN202010936933 A CN 202010936933A CN 112142192 A CN112142192 A CN 112142192A
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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
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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
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- C02F2303/02—Odour removal or prevention of malodour
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Abstract
The invention provides a membrane-supported biological deodorization reactor and a deodorization method. The membrane-carried biological deodorization reactor comprises a reactor body, a plurality of membrane components, a plurality of back-washing aeration heads, a first air supply unit and a second air supply unit; the membrane module and the back washing aeration head are arranged in the reactor body; the first air supply unit is communicated with the membrane module, and the second air supply unit is communicated with the backwashing aeration head; the back washing aeration head is arranged towards the membrane module. The invention can realize the regulation of the thickness of the biomembrane, has high metabolic activity of high-efficiency degradation microorganisms, high removal efficiency of sulfur-containing malodorous organic pollutants and high utilization efficiency of oxygen.
Description
Technical Field
The invention belongs to the technical field of environmental protection, and particularly relates to a membrane-borne biological deodorization reactor and a deodorization method.
Background
Along with the development of industrial production, the odor pollution is gradually intensified, the living environment of surrounding residents is seriously influenced, and a great deal of complaints of the residents are caused. In the human industrial production process, such as petroleum smelting plants, pesticide plants, rubber plants, paper mills, chemical plants and the like, a large amount of sulfur-containing malodorous organic pollutants are released, some urban public facilities such as refuse landfills and sewage treatment plants also generate sulfur-containing malodorous organic pollutants, and investigation shows that a certain refuse landfill gas collecting well contains high-concentration methyl sulfide (36847-3) Methyl mercaptan (15136-3) Carbon disulfide (8757-9009. mu.g/m)3) And dimethyl disulfide (2945-4561. mu.g/m)3). The sulfur-containing malodorous organic pollutants have the properties of low odor threshold, high toxicity and high corrosion, contain acidic components, have strong corrosivity and reducibility, can corrode metals and poison petroleum products. Its existence is more direct to make people produce discomfort, endangers human health: the respiratory system is influenced, and the existence of the malodor causes unpleasant feeling and strongly stimulates the sense organ to hinder the normal breathing; the circulation system is obstructed, and along with the breathing process, part of malodorous substances can enter the circulation system, for example, hydrogen sulfide has strong toxicity, and can obstruct the transportation of oxygen after entering blood in the circulation process, thereby influencing the normal physiological function of a human body; the digestive system is damaged, and the nausea, vomiting, anorexia and other symptoms can be caused by frequent contact with malodorous substances, so that the digestive deterioration, the endocrine disturbance and the like are caused; affecting the nervous system and causing poisoning of nerves by prolonged exposure to malodour, e.g. CS2Has neurotoxicity and damage to the brain; the organic acid-base compound liquid can damage human organs, and can corrode organs such as eyes and skin of a human body after being contacted with acidic malodorous substances for a long time, so that the eyes are damaged, and the normal vision of the human is influenced; part of the organic malodorous substances may also cause poisoning, canceration and even death. Therefore, in order to enable residents to have healthier production and life, the treatment of sulfur-containing malodorous organic pollutants needs to be solved urgently.
The traditional stink removing method mainly comprises three aspects of physics, biology and chemistry, the physical process mainly comprises water absorption, physical adsorption, cooling and condensation, masking, dilution and the like, the stink gas is removed by adopting the physical method, the gas is not really removed, and only is transferred or masked, so that the stink can be removed by further subsequent treatment. The chemical process mainly comprises wet chemical absorption, chemical adsorption, chemical oxidation, catalytic oxidation and the like, and the problems of secondary pollution, high operation cost and the like exist when malodorous gas is removed by a chemical method. Biological deodorization has attracted extensive attention due to its advantages of high purification efficiency, low investment cost, no secondary pollution, etc. At present, research on removing sulfur-containing malodor by a biological method is mainly focused on a biological trickling filter, and the problems of easy blockage and low gas-liquid mass transfer efficiency exist.
Disclosure of Invention
In view of the above-mentioned disadvantages of the prior art, the present invention provides a membrane-supported biological deodorization reactor and a deodorization method, which can adjust the thickness of a biological membrane, and has high metabolic activity for efficiently degrading microorganisms, high removal efficiency of sulfur-containing malodorous organic pollutants, and high utilization efficiency of oxygen.
In order to achieve the above objects and other related objects, a first aspect of the present invention provides a membrane-supported biological deodorization reactor, including a reactor body, a plurality of membrane modules, a plurality of backwash aeration heads, a first air supply unit and a second air supply unit;
the membrane module and the back washing aeration head are arranged in the reactor body;
the first air supply unit is communicated with the membrane module, and the second air supply unit is communicated with the backwashing aeration head; the back washing aeration head is arranged towards the membrane module.
In a second aspect, the present invention provides a membrane-supported biological deodorization method, comprising the steps of:
1) introducing waste liquid and sludge to be treated into the membrane-carried biological deodorization reactor, and performing active sludge acclimation under the condition of oxygen supply pressure;
2) after the acclimation of the activated sludge is finished, continuously introducing the waste liquid to be treated, and performing membrane-carried biological deodorization under the conditions of oxygen supply pressure and aeration.
Preferably, in the step 1), VSS of the sludge is 10-20 g/L, such as 10-15 g/L or 15-20 g/L.
Preferably, in the step 1), the concentration of the sulfur-containing pollutants in the waste liquid to be treated is 2-5 mmol/L.
Preferably, in the step 1), the hydraulic retention time is 12-24 h.
Preferably, in the step 1), the oxygen gas supply pressure is 6-8 psi.
Preferably, in the step 1), the acclimation time is 3-4 days.
Preferably, in the step 2), the concentration of the sulfur-containing pollutants in the waste liquid to be treated is 0.1-100 mmol/L.
Preferably, in step 2), the supply pressure of the oxygen is 1-20 psi, such as 1-5 psi, 5-10 psi or 10-20 psi.
Preferably, in step 2), the oxygen supply pressure is dynamically adjusted according to the concentration of the sulfur-containing contaminants in the feed water. The dynamic adjustment can be performed according to the following method: setting the gas supply pressure of initial oxygen to be 5-10 psi, when the concentration of the sulfur-containing pollutants in the inlet water is 0.1-5 mmol/L, controlling the corresponding valve by the control unit to adjust the gas supply pressure of the oxygen to be 3-5 psi, and if the concentration of the sulfur-containing pollutants rises and is 5mmol/L higher per liter, controlling the corresponding valve by the control unit to increase the gas supply pressure of the oxygen by one psi and to 20psi at most.
Preferably, in the step 2), the oxygen supply pressure is dynamically fed back and adjusted by monitoring the concentration of the sulfur-containing pollutants in the effluent of the membrane-borne biological deodorization reactor. The dynamic feedback adjustment can be performed as follows: the concentration of sulfur-containing pollutants in the effluent is 10-4-10-3At mmol/L, the supply pressure of oxygen is not changed, and the concentration of sulfur-containing pollutants in the effluent is 10-3-10-2At mmol/L, the supply pressure of oxygen is increased by 2psi, and the concentration of sulfur-containing pollutants in the effluent is 10-2-10-1At mmol/L, the supply pressure of oxygen is increased by 4psi, and the concentration of sulfur-containing pollutants in the effluent is 10-1At-1 mmol/L, the oxygen feed pressure increased by 10 psi.
Preferably, in step 2), the membrane thickness is adjusted by periodic aeration.
Preferably, in the step 2), the hydraulic retention time is 30-240 min, such as 30-120 min or 120-240 min.
Preferably, in step 2), aeration is carried outThe scouring strength is 10 to 20L/(s.m)2) Such as 10 to 15L/(s.m)2) Or 15 to 20L/(s.m)2)。
Preferably, in the step 2), the aeration flushing time is 2-5 min.
The technical scheme has the following beneficial effects:
(1) the invention can realize the regulation of the thickness of the biomembrane and has high metabolic activity for efficiently degrading microorganisms.
(2) The invention can realize the cyclic utilization of the spray liquid, reduce the oxygen supply amount and has low operation cost.
(3) The invention has the advantages of compact device, small occupied area, simple and convenient operation, high automation degree, easy popularization and the like.
(4) The method can dynamically adjust the oxygen supply amount according to the water inlet concentration and the water outlet concentration of the sulfur-containing pollutants, improves the oxygen utilization efficiency while efficiently purifying, and can realize the removal efficiency of the sulfur-containing malodorous organic pollutants of more than or equal to 99.9 percent and the oxygen utilization efficiency of more than or equal to 99 percent at the highest.
Drawings
FIG. 1 is a schematic front view of a membrane-supported biological deodorization reactor according to the present invention.
FIG. 2 is a schematic top view of the membrane-supported biological deodorization reactor according to the present invention.
Reference numerals
1 reactor body
2 Membrane module
3 backwashing aeration head
4 first air supply unit
41 oxygen storage tank
42 first conduit
43 second conduit
44 first valve
45 second valve
5 second air supply Unit
51 blower
52 third conduit
53 third valve
6 water inlet
61 Water inlet valve
62 first contaminant detection unit
7 water inlet well
8 water inlet channel
9 water distribution hole
10 water outlet
11 water outlet well
12 gas phase discharge port
13 water-retaining skirt board
14 baffle
15 go out mud well
151 mud discharging hole
16 mud pipe
17 control unit
Detailed Description
The technical solution of the present invention is illustrated by specific examples below. It is to be understood that one or more method steps mentioned in the present invention do not exclude the presence of other method steps before or after the combination step or that other method steps may be inserted between the explicitly mentioned steps; it should also be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Moreover, unless otherwise indicated, the numbering of the various method steps is merely a convenient tool for identifying the various method steps, and is not intended to limit the order in which the method steps are arranged or the scope of the invention in which the invention may be practiced, and changes or modifications in the relative relationship may be made without substantially changing the technical content.
A membrane-carried biological deodorization reactor is shown in figure 1 and comprises a reactor body 1, a plurality of membrane modules 2, a plurality of back-washing aeration heads 3, a first air supply unit 4 and a second air supply unit 5;
the membrane module 2 and the back washing aeration head 3 are arranged in the reactor body 1;
the first air supply unit 4 is communicated with the membrane module 2, and the second air supply unit 5 is communicated with the backwashing aerator 3; the back washing aeration head 3 is arranged towards the membrane module 2.
In a preferred embodiment, as shown in fig. 2, the reactor body 1 is cylindrical, the membrane-supported biological deodorization reactor further includes a water inlet 6, a water inlet well 7, a water inlet channel 8 and a plurality of water distribution holes 9, the water inlet 6 is disposed on the reactor body 1, the water inlet 6 is communicated with the water inlet well 7, the water inlet channel 8 is disposed around the inner wall of the reactor body, and the water distribution holes 9 are disposed on the water inlet channel 8.
In a preferred embodiment, a horizontally arranged water retaining skirt board and a vertically arranged baffle board are arranged below the water inlet channel, one end of the water retaining skirt board is connected with the inner side wall of the reactor body, and a gap is arranged between the other end of the water retaining skirt board and the baffle board so as to form a water flowing channel. This design does benefit to the water and evenly gets into the reactor body in, does benefit to the subsidence of suspended solid.
In a preferred embodiment, the water inlet 6 is further provided with a water inlet valve 61 and/or a first contaminant detection unit 62.
In a preferred embodiment, the water distribution holes 9 are arranged from sparse to dense in the water flow direction, which is favorable for uniform water distribution.
In a preferred embodiment, the membrane-supported biological deodorization reactor further includes a water outlet 10 and a water outlet well 11, the water outlet well 11 is disposed in the reactor body 1, the water outlet 10 is disposed on the reactor body 1, and the water outlet 10 is communicated with the water outlet well 11.
In a preferred embodiment, the membrane-supported biological deodorization reactor further comprises a mud outlet well 15 and a mud discharge pipe 16, wherein the mud outlet well 15 is arranged below the water outlet well 11, a mud discharge hole 151 is formed in the mud outlet well 15, and the mud outlet well 15 is communicated with the mud discharge pipe 16.
In a preferred embodiment, a second pollutant detection unit is further disposed on the water outlet 10.
In a preferred embodiment, the reactor body 1 is cylindrical, and the membrane modules 2 are arranged in the reactor body 1 in an annular array.
The membrane module 2 discharges water from the periphery of the inlet water to the center along the radial direction from dense to sparse, which is beneficial to efficiently degrading pollutants.
In a preferred embodiment, the first gas supply unit 4 comprises an oxygen storage tank 41, a first pipeline 42 and a plurality of second pipelines 43, each second pipeline 43 is communicated with each membrane module 2, and the oxygen storage tank 41 is communicated with the plurality of second pipelines 43 through the first pipeline 42.
The first air supply unit 4 further comprises a first valve 44, and the first valve 44 is arranged on the first pipeline 42.
The first air supply unit 4 further comprises a plurality of second valves 45, and each second valve 45 is disposed on each second pipeline 43.
In a preferred embodiment, the second air supply unit 5 comprises a blower 51 and a third pipeline 52, and the blower 51 is communicated with the backwash aeration heads 3 through the third pipeline 52.
In a preferred embodiment, the second air supply unit 5 further comprises a third valve 53, the third valve 53 being provided on the third conduit 52.
In a preferred embodiment, the membrane-supported biological deodorization reactor further comprises a gas phase discharge port 12, and the gas phase discharge port 12 is arranged at the top of the reactor body 1.
In a preferred embodiment, the carrier membrane in the membrane module 2 is a non-porous hollow fiber membrane.
In a preferred embodiment, the membrane-borne biological deodorization reactor further comprises a control unit 17, wherein the control unit 17 is in signal connection with at least one selected from the group consisting of the water inlet valve 61, the first contaminant detection unit 62, the first valve 44, the third valve 53 and the second contaminant detection unit.
Example 1
The membrane-carried biological deodorization reactor used in the examples is shown in fig. 1 and 2, and specifically comprises the following steps:
(1) pumping waste liquid to be treated with the mercapto content of 5mmol/L and sludge of a secondary sedimentation tank of a sewage treatment plant with the VSS of 15g/L into a membrane-carried biological deodorization reactor for membrane hanging, wherein the hydraulic retention time is 24 hours, the oxygen aeration partial pressure is 8psi, and the domestication is completed after 3 d;
(2) pumping the waste liquid to be treated with the mercapto content of 5mmol/L into a membrane-borne biological deodorization reactor, controlling the oxygen pressure to be 10psi, dynamically adjusting the oxygen aeration amount according to the concentration of the water inlet pollutants, increasing the oxygen pressure by 5mmol/L per liter, and controlling a corresponding valve to adjust the air supply pressure of the oxygen to be increased by one psi by a control unit, wherein the air supply pressure is increased to 20psi at most;
(3) adjusting the hydraulic retention time to be 30 min;
(4) monitoring the concentration of pollutants in the effluent water of the membrane reactor, and feeding back and adjusting the oxygen aeration rate: the concentration of sulfur-containing pollutants in the effluent is 10-4-10-3At mmol/L, the supply pressure of oxygen is not changed, and the concentration of sulfur-containing pollutants in the effluent is 10-3-10-2At mmol/L, the supply pressure of oxygen is increased by 2psi, and the concentration of sulfur-containing pollutants in the effluent is 10-2-10-1At mmol/L, the supply pressure of oxygen is increased by 4psi, and the concentration of sulfur-containing pollutants in the effluent is 10-1At-1 mmol/L, the oxygen feed pressure increased by 10 psi.
(5) The flushing intensity of the air flow is controlled to be 20L/(s.m)2) The washing time is 5min, and the frequency is 1 time per month. The amount of pollutants treated by the device reaches 180mol S.m-3·d-1The efficiency of sulfur-containing malodorous organic pollutants is 95 percent, and the utilization efficiency of oxygen reaches 99 percent.
Example 2
The membrane-carried biological deodorization reactor used in the examples is shown in fig. 1 and 2, and specifically comprises the following steps:
(1) pumping waste liquid to be treated with the mercapto content of 5mmol/L and sludge of a secondary sedimentation tank of a sewage treatment plant with the VSS of 15g/L into a membrane-carried biological deodorization reactor for membrane hanging, wherein the hydraulic retention time is 12h, the oxygen aeration partial pressure is 6psi, and the domestication is completed after 4 d;
(2) pumping the waste liquid to be treated with the mercapto content of 5mmol/L into a membrane-borne biological deodorization reactor, controlling the initial oxygen pressure to be 10psi, adjusting the oxygen aeration amount according to the concentration of the water inlet pollutants, increasing the oxygen pressure by 5mmol/L per liter, and controlling the corresponding valve to adjust the air supply pressure of the oxygen by one psi under the control of a control unit, wherein the air supply pressure is increased to 20psi at most;
(3) adjusting the hydraulic retention time to 120 min;
(4) monitoring the concentration of pollutants in the effluent water of the membrane reactor, and feeding back and adjusting the oxygen aeration rate: the concentration of sulfur-containing pollutants in the effluent is 10-4-10-3At mmol/L, the supply pressure of oxygen is not changed, and the concentration of sulfur-containing pollutants in the effluent is 10-3-10-2At mmol/L, the supply pressure of oxygen is increased by 2psi, and the concentration of sulfur-containing pollutants in the effluent is 10-2-10-1At mmol/L, the supply pressure of oxygen is increased by 4psi, and the concentration of sulfur-containing pollutants in the effluent is 10-1At-1 mmol/L, the oxygen feed pressure increased by 10 psi.
(5) The flushing intensity of the air flow is controlled to be 20L/(s.m)2) The washing time is 5min, and the frequency is 1 time per month. The amount of pollutants treated by the device reaches 150mol S.m-3·d-1The efficiency of sulfur-containing malodorous organic pollutants is 98 percent, and the utilization efficiency of oxygen reaches 99 percent.
Example 3
The membrane-carried biological deodorization reactor used in the examples is shown in fig. 1 and 2, and specifically comprises the following steps:
(1) pumping waste liquid to be treated with the mercapto content of 5mmol/L and sludge of a secondary sedimentation tank of a sewage treatment plant with the VSS of 15g/L into a membrane-carried biological deodorization reactor for membrane hanging, wherein the hydraulic retention time is 12h, the oxygen aeration partial pressure is 6psi, and the domestication is completed after 4 d;
(2) pumping the waste liquid to be treated with the mercapto content of 5mmol/L into a membrane-borne biological deodorization reactor, controlling the initial oxygen pressure to be 10psi, dynamically adjusting the oxygen aeration amount according to the concentration of the water inlet pollutants, increasing the oxygen pressure by 5mmol/L per liter, and controlling a corresponding valve to adjust the air supply pressure of the oxygen by one psi under the control of a control unit, wherein the air supply pressure is increased to 20psi at most;
(3) adjusting the hydraulic retention time to 240 min;
(4) monitoring the concentration of pollutants in the effluent water of the membrane reactor, and feeding back and adjusting the oxygen aeration rate: the concentration of sulfur-containing pollutants in the effluent is 10-4-10-3At mmol/L, the supply pressure of oxygen is not changed, and the concentration of sulfur-containing pollutants in the effluent is 10-3-10-2At mmol/L, the supply pressure of oxygen is increased by 2psi, and the concentration of sulfur-containing pollutants in the effluent is 10-2-10-1At mmol/L, the supply pressure of oxygen is increased by 4psi, and the concentration of sulfur-containing pollutants in the effluent is 10-1At-1 mmol/L, the oxygen feed pressure increased by 10 psi.
(5) The flushing pressure of the air flow is controlled to be 20L/(s.m)2) The washing time is 5min, and the frequency is 1 time per month. The amount of pollutants treated by the device reaches 130mol S.m-3·d-1The efficiency of sulfur-containing malodorous organic pollutants is 99.9 percent, and the utilization efficiency of oxygen reaches 99 percent.
Example 4
The membrane-carried biological deodorization reactor used in the examples is shown in fig. 1 and 2, and specifically comprises the following steps:
(1) pumping waste liquid to be treated with the mercapto content of 5mmol/L and sludge of a secondary sedimentation tank of a sewage treatment plant with the VSS of 15g/L into a membrane-carried biological deodorization reactor for membrane hanging, wherein the hydraulic retention time is 12h, the oxygen aeration partial pressure is 6psi, and the domestication is completed after 4 d;
(2) pumping the waste liquid to be treated with the mercapto content of 5mmol/L into a membrane-borne biological deodorization reactor, controlling the initial oxygen pressure to be 5psi, dynamically adjusting the oxygen aeration amount according to the concentration of the water inlet pollutants, increasing the oxygen pressure by 5mmol/L per liter, and controlling a corresponding valve to adjust the air supply pressure of the oxygen by one psi under the control of a control unit, wherein the air supply pressure is increased to 20psi at most;
(3) adjusting the hydraulic retention time to 240 min;
(4) feedback regulation for monitoring pollutant concentration in effluent water of membrane reactorOxygen aeration rate: the concentration of sulfur-containing pollutants in the effluent is 10-4-10-3At mmol/L, the supply pressure of oxygen is not changed, and the concentration of sulfur-containing pollutants in the effluent is 10-3-10-2At mmol/L, the supply pressure of oxygen is increased by 2psi, and the concentration of sulfur-containing pollutants in the effluent is 10-2-10-1At mmol/L, the supply pressure of oxygen is increased by 4psi, and the concentration of sulfur-containing pollutants in the effluent is 10-1At-1 mmol/L, the oxygen feed pressure increased by 10 psi.
(5) The flushing pressure of the air flow is controlled to be 20L/(s.m)2) The washing time is 5min, and the frequency is 1 time per month. The amount of pollutants treated by the device reaches 120mol S.m-3·d-1The efficiency of sulfur-containing malodorous organic pollutants is 99 percent, and the utilization efficiency of oxygen is 99 percent.
Example 5
The membrane-carried biological deodorization reactor used in the examples is shown in fig. 1 and 2, and specifically comprises the following steps:
(1) pumping waste liquid to be treated with the mercapto content of 5mmol/L and sludge of a secondary sedimentation tank of a sewage treatment plant with the VSS of 15g/L into a membrane-carried biological deodorization reactor for membrane hanging, wherein the hydraulic retention time is 12h, the oxygen aeration partial pressure is 6psi, and the domestication is completed after 4 d;
(2) pumping the waste liquid to be treated with the mercapto content of 5mmol/L into a membrane-borne biological deodorization reactor, controlling the initial oxygen pressure to be 10psi, dynamically adjusting the oxygen aeration amount according to the concentration of the water inlet pollutants, increasing the oxygen pressure by 5mmol/L per liter, and controlling a corresponding valve to adjust the air supply pressure of the oxygen by one psi under the control of a control unit, wherein the air supply pressure is increased to 20psi at most;
(3) adjusting the hydraulic retention time to 240 min;
(4) monitoring the concentration of pollutants in the effluent water of the membrane reactor, and feeding back and adjusting the oxygen aeration rate: the concentration of sulfur-containing pollutants in the effluent is 10-4-10-3At mmol/L, the supply pressure of oxygen is not changed, and the concentration of sulfur-containing pollutants in the effluent is 10-3-10-2At mmol/L, the supply pressure of oxygen is increased by 2psi, and the concentration of sulfur-containing pollutants in the effluent is 10-2-10-1At mmol/L, the supply pressure of oxygen is increased by 4psi, and the effluent contains sulfur contaminantsThe concentration is 10-1At-1 mmol/L, the oxygen feed pressure increased by 10 psi.
(5) The flushing pressure of the air flow is controlled to be 10L/(s.m)2) The washing time is 5min, and the frequency is 1 time per month. The amount of pollutants treated by the device reaches 120mol S.m-3·d-1The efficiency of sulfur-containing malodorous organic pollutants is 99 percent, and the utilization efficiency of oxygen is 99 percent.
Example 6
The membrane-carried biological deodorization reactor used in the examples is shown in fig. 1 and 2, and specifically comprises the following steps:
(1) pumping waste liquid to be treated with the mercapto content of 5mmol/L and sludge of a secondary sedimentation tank of a sewage treatment plant with the VSS of 15g/L into a membrane-carried biological deodorization reactor for membrane hanging, wherein the hydraulic retention time is 12h, the oxygen aeration partial pressure is 6psi, and the domestication is completed after 4 d;
(2) pumping the waste liquid to be treated with the mercapto content of 5mmol/L into a membrane-borne biological deodorization reactor, controlling the initial oxygen pressure to be 10psi, dynamically adjusting the oxygen aeration amount according to the concentration of the water inlet pollutants, increasing the oxygen pressure by 5mmol/L per liter, and controlling a corresponding valve to adjust the air supply pressure of the oxygen by one psi under the control of a control unit, wherein the air supply pressure is increased to 20psi at most;
(3) adjusting the hydraulic retention time to 240 min;
(4) monitoring the concentration of pollutants in the effluent water of the membrane reactor, and feeding back and adjusting the oxygen aeration rate: the concentration of sulfur-containing pollutants in the effluent is 10-4-10-3At mmol/L, the supply pressure of oxygen is not changed, and the concentration of sulfur-containing pollutants in the effluent is 10-3-10-2At mmol/L, the supply pressure of oxygen is increased by 2psi, and the concentration of sulfur-containing pollutants in the effluent is 10-2-10-1At mmol/L, the supply pressure of oxygen is increased by 4psi, and the concentration of sulfur-containing pollutants in the effluent is 10-1At-1 mmol/L, the oxygen feed pressure increased by 10 psi.
(5) The flushing intensity of the air flow is controlled to be 15L/(s.m 2), the flushing time is 5min, and the frequency is 1 time per month. The amount of pollutants treated by the device reaches 125mol S.m-3·d-1The efficiency of sulfur-containing malodorous organic pollutants is 98 percent, and the utilization efficiency of oxygen reaches 99 percent.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. A membrane-carried biological deodorization reactor is characterized by comprising a reactor body (1), a plurality of membrane assemblies (2), a plurality of backwashing aeration heads (3), a first air supply unit (4) and a second air supply unit (5);
the membrane module (2) and the back washing aeration head (3) are arranged in the reactor body (1);
the first air supply unit (4) is communicated with the membrane module (2), and the second air supply unit (5) is communicated with the backwashing aeration head (3); the back washing aeration head (3) is arranged towards the membrane module (2).
2. The membrane-borne bioremediation reactor of claim 1, further comprising at least one of the following technical features:
1) the reactor body (1) is cylindrical, the membrane-supported biological deodorization reactor further comprises a water inlet (6), a water inlet well (7), a water inlet channel (8) and a plurality of water distribution holes (9), the water inlet (6) is arranged on the reactor body (1), the water inlet (6) is communicated with the water inlet well (7), the water inlet channel (8) is arranged on the inner wall of the reactor body in a surrounding mode, and the water distribution holes (9) are arranged on the water inlet channel (8);
2) the membrane-carried biological deodorization reactor further comprises a water outlet (10) and a water outlet well (11), wherein the water outlet well (11) is arranged in the reactor body (1), the water outlet (10) is arranged on the reactor body (1), and the water outlet (10) is communicated with the water outlet well (11);
3) the reactor body (1) is cylindrical, and the membrane modules (2) are arranged in the reactor body (1) in an annular array;
4) the first gas supply unit (4) comprises an oxygen storage tank (41), a first pipeline (42) and a plurality of second pipelines (43), each second pipeline (43) is communicated with each membrane module (2), and the oxygen storage tank (41) is communicated with the plurality of second pipelines (43) through the first pipeline (42);
5) the second air supply unit (5) comprises a blower (51) and a third pipeline (52), and the blower (51) is communicated with the backwashing aeration heads (3) through the third pipeline (52);
6) the membrane-loaded biological deodorization reactor also comprises a gas phase discharge port (12), and the gas phase discharge port (12) is arranged at the top of the reactor body (1);
7) the carrier membrane in the membrane component (2) is a non-porous hollow fiber membrane.
3. The membrane-supported biological deodorization reactor according to claim 2, characterized in that the characteristic 1) further comprises at least one of the following technical features:
1) a horizontally arranged water retaining skirt board (13) and a vertically arranged baffle board (14) are arranged below the water inlet channel (8), one end of the water retaining skirt board (13) is connected with the inner side wall of the reactor body, and a gap is arranged between the other end of the water retaining skirt board and the baffle board (14) so as to form a water flowing channel;
2) a water inlet valve (61) and/or a first pollutant detection unit (62) are/is further arranged on the water inlet (6);
3) the water distribution holes (9) are arranged in a dense mode from sparse to dense along the water flow direction.
4. The membrane-supported biological deodorization reactor according to claim 2, wherein the characteristics 2) further comprise at least one of the following technical characteristics:
1) the membrane-carried biological deodorization reactor further comprises a mud outlet well (15) and a mud discharge pipe (16), wherein the mud outlet well (15) is arranged below the water outlet well (11), a mud discharge hole (151) is formed in the mud outlet well (15), and the mud outlet well (15) is communicated with the mud discharge pipe (16);
2) and a second pollutant detection unit is also arranged on the water outlet (10).
5. The membrane-borne biological deodorization reactor as set forth in claim 2, wherein in the feature 3), the membrane modules (2) are arranged from dense to sparse in the radial direction from the periphery of the inlet water to the center of the outlet water.
6. The membrane-supported biological deodorization reactor according to claim 2, characterized in that in feature 4), at least one of the following technical features is further included:
1) the first air supply unit (4) further comprises a first valve (44), and the first valve (44) is arranged on the first pipeline (42);
2) the first air supply unit (4) further comprises a plurality of second valves (45), and each second valve (45) is arranged on each second pipeline (43).
7. The membrane-borne biological deodorization reactor according to claim 2, characterized in that in 5), the second air supply unit (5) further comprises a third valve (53), and the third valve (53) is disposed on the third pipe (52).
8. The membrane-borne bioremediation reactor of any one of claims 1 to 7, further comprising a control unit (17), wherein the control unit (17) is in signal connection with at least one selected from the group consisting of the water inlet valve (61), the first contaminant detection unit (62), the first valve (44), the third valve (53), and a second contaminant detection unit.
9. A membrane-supported biological deodorization method is characterized by comprising the following steps:
1) introducing waste liquid and sludge to be treated into the membrane-carried biological deodorization reactor of any one of claims 1 to 8, and performing active sludge acclimation under the condition of oxygen supply pressure;
2) after the acclimation of the activated sludge is finished, continuously introducing the waste liquid to be treated, and performing membrane-carried biological deodorization under the conditions of oxygen supply pressure and aeration.
10. The membrane-borne biological deodorization method according to claim 9, further comprising at least one of the following technical features:
1) in the step 1), VSS of the sludge is 10-20 g/L;
2) in the step 1), the concentration of sulfur-containing pollutants in the waste liquid to be treated is 2-5 mmol/L;
3) in the step 1), the hydraulic retention time is 12-24 h;
4) in the step 1), the oxygen supply pressure is 6-8 psi;
5) in the step 1), the domestication time is 3-4 days;
6) in the step 2), the concentration of sulfur-containing pollutants in the waste liquid to be treated is 0.1-100 mmol/L;
7) in the step 2), the supply pressure of the oxygen is 1-20 psi;
8) in the step 2), dynamically adjusting the oxygen supply pressure according to the concentration of the sulfur-containing pollutants in the inlet water;
9) in the step 2), the oxygen supply pressure is dynamically fed back and adjusted by monitoring the concentration of sulfur-containing pollutants in the effluent of the membrane-borne biological deodorization reactor;
10) in the step 2), the film thickness is adjusted by regular aeration;
11) in the step 2), the hydraulic retention time is 30-240 min;
12) in the step 2), the aeration scouring strength is 10-20L/(s.m)2)；
13) In the step 2), the aeration and washing time is 2-5 min.
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