CN110950501A

CN110950501A - BOM production process

Info

Publication number: CN110950501A
Application number: CN201911336027.7A
Authority: CN
Inventors: 鹿学元; 苏斌; 魏广亮; 王教亮
Original assignee: Shandong Juxiang Environmental Engineering Co ltd
Current assignee: Shandong Juxiang Environmental Engineering Co ltd
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2020-04-03

Abstract

The invention provides a BOM production process, which belongs to the field of sewage treatment and comprises the following specific steps of preparing water inlet treatment, introducing sewage into a grid well for treatment, conducting water diversion treatment through a lift pump, conducting water to a biological contact oxidation pond for treatment, introducing oxidized water into a high polymer biological membrane pond for treatment, introducing the treated water into a clean water pond for treatment and conducting discharged water for treatment. The BOM production process is beneficial to interception, growth and reproduction of nitrobacteria with slow proliferation, and the nitrification efficiency of the system is improved; the membrane separation ensures that macromolecular refractory components in the sewage have enough residence time in a bioreactor with limited volume, thereby greatly improving the degradation efficiency of refractory organic matters; the reactor operates under high volume load, low sludge load and long sludge, and can realize the discharge of basically no residual sludge.

Description

BOM production process

Technical Field

The invention belongs to the technical field of sewage treatment, and particularly relates to a BOM production process.

Background

Sewage may be defined as a waste-laden liquid or water mixed with ground water, surface water, snow storms, etc. discharged from residential, institutional, commercial or industrial areas from the point of view of the source of the sewage. Sewage is classified into many categories, and there are many techniques and processes for reducing the environmental impact of sewage accordingly. Sewage can be classified into these four categories according to the source of the sewage.

The first type: industrial wastewater is derived from sewage from manufacturing mining and industrial production activities, including runoff leachate from industrial or commercial storage, processing, and other wastewater that is not domestic sewage.

The second type: domestic sewage is sewage from a house, an office building, an office or the like; sanitary sewage; sewage water, including industrial waste water mixed in domestic sewage water in a sewer system. Garbage, various atmospheric particulates, and the like, which enter the water environment through surface runoff, soil erosion, farmland drainage, and the like. The method has the characteristics of dispersity, concealment, randomness, latency, accumulation, ambiguity and the like, so that the method is difficult to monitor and quantify, and the difficulty of research, prevention and control is high. Water pollutants (Waterpollutant) are the substances that cause pollution when discharged into a body of water.

In the third category: commercial sewage comes from commercial facilities and some components exceed the non-toxic, harmless sewage of domestic sewage. Such as restaurant sewage. Laundry sewage, animal feeding sewage, sewage generated by a hair salon, and the like.

The fourth type: surface runoff comes from rain, snow, highway sewage, water from urban and industrial areas, etc., and surface runoff does not seep into the soil and enters groundwater along streets and lands.

The quartz sand filtration in the prior art is one of the most effective means for removing suspended matters in water, and is an important unit in sewage advanced treatment, sewage recycling and water supply treatment. The effect is to further remove flocculated pollutants in water, and the purpose of purifying water is achieved through the interception, sedimentation and adsorption effects of filter materials.

1. The system is used for industrial water, domestic water and municipal water supply systems which require that the effluent turbidity is less than or equal to 5mg/L and can meet the drinking water quality standard;

2. removing suspended matters and solid matters in the industrial sewage;

3. can be used as pretreatment equipment in an ion exchange softening and desalting system and coarse filtration equipment of industrial feed water with low requirement on water quality; and in swimming pool circulating treatment systems, cooling circulating water purification systems, and the like.

However, the existing sewage treatment process has the problems of poor treatment effect, incapability of degrading organic matters and unclean treatment of larger impurities.

Therefore, the BOM production process is very necessary.

Disclosure of Invention

In order to solve the technical problems, the invention provides a BOM production process, which aims to solve the problems that the existing sewage treatment process has poor treatment effect, can not degrade organic matters and cannot treat large impurities cleanly, and specifically comprises the following steps:

the method comprises the following steps: preparing water inlet treatment, collecting domestic sewage and production wastewater into a septic tank through a pipe network, wherein the domestic sewage contains a large amount of excrement, paper scraps, disease protozoa and suspended solid with the concentration of 100-350mg/L, the concentration of organic matter CODCr is between 100-400mg/L, and the concentration of suspended organic matter BOD5 is 50-200 mg/L; 50 to 60 percent of suspended matters can be removed by the sedimentation of the sewage in a reasonable range of the septic tank; decomposing the settled sludge by anaerobic fermentation for more than 3 months to decompose organic matters in the sludge into stable inorganic matters, and converting putrescible raw sludge into stable cooked sludge;

step two: introducing sewage into a grid well for treatment, removing impurities with the thickness of more than 20mm in the water through a grid, and then introducing the water into a water collecting tank; sundries blocked by the grating are automatically scraped and sent into the grating fence to be cleaned regularly;

step three: carrying out water diversion treatment by a lifting pump, lifting the treated sewage in the grille well by the lifting pump for biochemical treatment, and carrying out lifting operation by the lifting pump according to the speed in a reasonable range;

step four: leading water to a biological contact oxidation pond for treatment, and specifically comprising the following steps:

the first step is as follows: the sewage entering the contact oxidation tank from the grid channel has high content of ammonia nitrogen and organic matters, particularly organic nitrogen, when the organic matters are biodegraded, the organic nitrogen can be expressed in the form of ammonia nitrogen, the ammonia nitrogen is also an important pollution control index, the microorganism is in an anoxic state under the action of hydrolysis, at the moment, the microorganism is facultative microorganism, the microorganism converts the organic nitrogen in the sewage into the ammonia nitrogen, simultaneously, an organic carbon source is used as an electron donor, NO 2-N, NO 3-N is converted into N2, and part of the organic carbon source and the ammonia nitrogen are also utilized to synthesize new cell substances;

the second step is that: under the biochemical action of the contact oxidation tank, a certain amount of organic matters and higher ammonia nitrogen still exist in the sewage, so that the organic matters are further oxidized and decomposed, and under the condition that the carbonization action tends to be complete, the sewage in the BOM tank needs to flow back to complete the denitrification process; the method is realized by autotrophic bacteria (nitrifying bacteria), and the autotrophic bacteria utilize an inorganic carbon source generated by the decomposition of organic matters or carbon dioxide in the air as a nutrient source to convert ammonia nitrogen in the sewage into NO 2-N, NO 3-N; the contact oxidation biochemical pool is provided with a filler, and the whole biochemical treatment process is completed by depending on a plurality of microorganisms attached to the filler;

step five: introducing the oxidized water into a high polymer biological membrane pool for treatment, and the specific operation comprises the following steps:

the first step is as follows: removing biodegradable organic pollutants in water by activated sludge;

the second step is that: performing solid-liquid separation on the purified water and the activated sludge by adopting a biological membrane; the biological membrane can retain activated sludge and most suspended matters to obtain clear effluent;

the third step: continuously shaking the membrane by air with strength in a reasonable range below the biological membrane, refluxing the membrane to a biological contact oxidation pond through nitrification, performing secondary treatment, and discharging sludge;

step six: introducing the treated water into a clean water tank for treatment, and specifically, the method comprises the following steps:

the first step is as follows: injecting disinfectant into the clear water tank, stirring, and preparing to introduce treated clear water;

the second step is that: introducing the treated cleaning solution and the disinfectant for mixing, and mixing and stirring the cleaning solution and the disinfectant through a stirring rod to mix the disinfectant with clear water for disinfection treatment;

the third step: preparing for discharge treatment within a reasonable precipitation range;

step seven: treating the discharged water, storing the clear water treated by the BOM tank, and directly discharging the clear water after disinfection treatment; while storing clear water for the back flushing of the membrane.

Preferably, in the step one, the precipitation time is set to 12-24 h.

Preferably, in step three, the lifting speed is set to be 1-1.5 m/min.

Preferably, in the fourth step, an anoxic section is arranged inside the biological contact oxidation pond.

Preferably, in the fifth step, the biological membrane in the second step is a hollow fiber membrane.

Preferably, in step five, the biological membrane in the third step is a hollow fiber membrane, and the air intensity is controlled by an aeration pump.

Preferably, in the sixth step, chlorine liquid is used as the disinfection liquid in the first step.

Preferably, in the sixth step, the precipitation time in the third step is set to 30-45 min.

Compared with the prior art, the invention has the following beneficial effects: the BOM production process is widely applied to the technical field of sewage treatment. The BOM production process is beneficial to interception, growth and reproduction of nitrobacteria with slow proliferation, and the nitrification efficiency of the system is improved; the membrane separation ensures that macromolecular refractory components in the sewage have enough residence time in a bioreactor with limited volume, thereby greatly improving the degradation efficiency of refractory organic matters; the reactor operates under high volume load, low sludge load and long sludge, and can realize the discharge of basically no excess sludge; in order to ensure that the membrane can be continuously and stably used for a long time, the membrane is continuously shaken by air with certain strength below the hollow fiber membrane, so that the oxygen supply function for biological oxidation is realized, and the pollution of the membrane caused by the adhesion of activated sludge on the surface of the membrane is prevented; through the partial anoxic section that belongs to in the contact oxidation pond, not only have certain organic matter and get rid of the function, alleviate the organic load in follow-up contact oxidation pond to do benefit to the nitrification and go on, rely on the high concentration organic matter in the sewage moreover, accomplish the denitrification, finally eliminate the eutrophication pollution of nitrogen, in order to improve sewage treatment effect.

Drawings

FIG. 1 is a flow chart of a BOM production process.

FIG. 2 is a flow chart of the process of diverting water to a biological contact oxidation tank.

FIG. 3 is a flow chart of the process of introducing oxidized water into a high-polymerized biomembrane pond.

Fig. 4 is a flow chart of the process of introducing treated water into a clean water basin.

Detailed Description

The invention is further described below with reference to the accompanying drawings:

in the figure:

as shown in figure 1

The BOM production process specifically comprises the following steps:

s101: preparing water inlet treatment, collecting domestic sewage and production wastewater into a septic tank through a pipe network, wherein the domestic sewage contains a large amount of excrement, paper scraps, disease protozoa and suspended solid with the concentration of 100-350mg/L, the concentration of organic matter CODCr is between 100-400mg/L, and the concentration of suspended organic matter BOD5 is 50-200 mg/L; 50 to 60 percent of suspended matters can be removed by the sedimentation of the sewage in a reasonable range of the septic tank; decomposing the settled sludge by anaerobic fermentation for more than 3 months to decompose organic matters in the sludge into stable inorganic matters, and converting putrescible raw sludge into stable cooked sludge;

s102: introducing sewage into a grid well for treatment, removing impurities with the thickness of more than 20mm in the water through a grid, and then introducing the water into a water collecting tank; sundries blocked by the grating are automatically scraped and sent into the grating fence to be cleaned regularly;

s103: carrying out water diversion treatment by a lifting pump, lifting the treated sewage in the grille well by the lifting pump for biochemical treatment, and carrying out lifting operation by the lifting pump according to the speed in a reasonable range;

s104: introducing water to a biological contact oxidation pond for treatment, as shown in the attached figure 2, and specifically comprising the following steps:

s401: the sewage entering the contact oxidation tank from the grid channel has high content of ammonia nitrogen and organic matters, particularly organic nitrogen, when the organic matters are biodegraded, the organic nitrogen can be expressed in the form of ammonia nitrogen, the ammonia nitrogen is also an important pollution control index, the microorganism is in an anoxic state under the action of hydrolysis, at the moment, the microorganism is facultative microorganism, the microorganism converts the organic nitrogen in the sewage into the ammonia nitrogen, simultaneously, an organic carbon source is used as an electron donor, NO 2-N, NO 3-N is converted into N2, and part of the organic carbon source and the ammonia nitrogen are also utilized to synthesize new cell substances;

s402: under the biochemical action of the contact oxidation tank, a certain amount of organic matters and higher ammonia nitrogen still exist in the sewage, so that the organic matters are further oxidized and decomposed, and under the condition that the carbonization action tends to be complete, the sewage in the BOM tank needs to flow back to complete the denitrification process; the method is realized by autotrophic bacteria (nitrifying bacteria), and the autotrophic bacteria utilize an inorganic carbon source generated by the decomposition of organic matters or carbon dioxide in the air as a nutrient source to convert ammonia nitrogen in the sewage into NO 2-N, NO 3-N; the contact oxidation biochemical pool is provided with a filler, and the whole biochemical treatment process is completed by depending on a plurality of microorganisms attached to the filler;

s105: introducing the oxidized water into a high-polymer biological membrane pool for treatment, as shown in the attached figure 3, and specifically comprising the following steps:

s501: removing biodegradable organic pollutants in water by activated sludge;

s502: performing solid-liquid separation on the purified water and the activated sludge by adopting a biological membrane; the biological membrane can retain activated sludge and most suspended matters to obtain clear effluent;

s503: continuously shaking the membrane by air with strength in a reasonable range below the biological membrane, refluxing the membrane to a biological contact oxidation pond through nitrification, performing secondary treatment, and discharging sludge;

s106: introducing the treated water into a clean water tank for treatment, as shown in the attached figure 4, and specifically, the method comprises the following steps:

s601: injecting disinfectant into the clear water tank, stirring, and preparing to introduce treated clear water;

s602: introducing the treated cleaning solution and the disinfectant for mixing, and mixing and stirring the cleaning solution and the disinfectant through a stirring rod to mix the disinfectant with clear water for disinfection treatment;

s603: preparing for discharge treatment within a reasonable precipitation range;

s107: treating the discharged water, storing the clear water treated by the BOM tank, and directly discharging the clear water after disinfection treatment; while storing clear water for the back flushing of the membrane.

Preferably, in S101, the settling time is set to 12-24 h.

Preferably, in S103, the lifting speed is set to 1-1.5 m/min.

Preferably, in S104, an anoxic section is disposed inside the biological contact oxidation pond.

Preferably, in S105, the biological membrane in S502 is a hollow fiber membrane.

Preferably, in S105, the biological membrane in S503 is a hollow fiber membrane, and the air intensity is controlled by an aeration pump.

Preferably, in S106, the disinfecting liquid in S601 is chlorine liquid.

Preferably, in S106, the settling time in S603 is set to 30-45 min.

Detailed description of the preferred embodiment

1. Preparing water inlet treatment, collecting domestic sewage and production wastewater into a septic tank through a pipe network, wherein the domestic sewage contains a large amount of excrement, paper scraps, disease protozoa and suspended solid with the concentration of 100-350mg/L, the concentration of organic matter CODCr is between 100-400mg/L, and the concentration of suspended organic matter BOD5 is 50-200 mg/L; 50 to 60 percent of suspended matters can be removed by the sedimentation of the sewage in a reasonable range of the septic tank; decomposing the settled sludge by anaerobic fermentation for more than 3 months to decompose organic matters in the sludge into stable inorganic matters, and converting putrescible raw sludge into stable cooked sludge;

2. introducing sewage into a grid well for treatment, removing impurities with the thickness of more than 20mm in the water through a grid, and then introducing the water into a water collecting tank; sundries blocked by the grating are automatically scraped and sent into the grating fence to be cleaned regularly;

3. carrying out water diversion treatment by a lifting pump, lifting the treated sewage in the grille well by the lifting pump for biochemical treatment, and carrying out lifting operation by the lifting pump according to the speed in a reasonable range;

4. leading water to a biological contact oxidation pond for treatment, and specifically comprising the following steps:

5. introducing the oxidized water into a high polymer biological membrane pool for treatment, and the specific operation comprises the following steps:

6. introducing the treated water into a clean water tank for treatment, and specifically, the method comprises the following steps:

7. treating the discharged water, storing the clear water treated by the BOM tank, and directly discharging the clear water after disinfection treatment; while storing clear water for the back flushing of the membrane.

The BOM production process is beneficial to interception, growth and reproduction of nitrobacteria with slow proliferation, and the nitrification efficiency of the system is improved; the membrane separation ensures that macromolecular refractory components in the sewage have enough residence time in a bioreactor with limited volume, thereby greatly improving the degradation efficiency of refractory organic matters; the reactor operates under high volume load, low sludge load and long sludge, and can realize the discharge of basically no residual sludge.

The technical solutions of the present invention or similar technical solutions designed by those skilled in the art based on the teachings of the technical solutions of the present invention are all within the scope of the present invention.

Claims

The BOM production process is characterized by comprising the following steps:

the method comprises the following steps: preparing water inlet treatment, collecting domestic sewage and production wastewater into a septic tank through a pipe network, wherein the domestic sewage contains a large amount of excrement, paper scraps, disease protozoa and suspended solid with the concentration of 100-350mg/L, the concentration of organic matter CODCr is between 100-400mg/L, and the concentration of suspended organic matter BOD5 is 50-200 mg/L; 50 to 60 percent of suspended matters can be removed by the sedimentation of the sewage in a reasonable range of the septic tank; decomposing the settled sludge by anaerobic fermentation for more than 3 months to decompose organic matters in the sludge into stable inorganic matters, and converting putrescible raw sludge into stable cooked sludge;

step two: introducing sewage into a grid well for treatment, removing impurities with the thickness of more than 20mm in the water through a grid, and then introducing the water into a water collecting tank; sundries blocked by the grating are automatically scraped and sent into the grating fence to be cleaned regularly;

step three: carrying out water diversion treatment by a lifting pump, lifting the treated sewage in the grille well by the lifting pump for biochemical treatment, and carrying out lifting operation by the lifting pump according to the speed in a reasonable range;

step four: introducing water to a biological contact oxidation pond for treatment;

step five: introducing the oxidized water into a high polymer biological membrane pool for treatment;

step six: introducing the treated water into a clean water tank for treatment;

step seven: treating the discharged water, storing the clear water treated by the BOM tank, and directly discharging the clear water after disinfection treatment; while storing clear water for the back flushing of the membrane.
2. The BOM production process of claim 1, wherein in step four, the water is introduced into the biological contact oxidation pond for treatment, and the specific operation comprises the following steps:

the first step is as follows: the sewage entering the contact oxidation tank from the grid channel has high content of ammonia nitrogen and organic matters, particularly organic nitrogen, when the organic matters are biodegraded, the organic nitrogen can be expressed in the form of ammonia nitrogen, the ammonia nitrogen is also an important pollution control index, the microorganism is in an anoxic state under the action of hydrolysis, at the moment, the microorganism is facultative microorganism, the microorganism converts the organic nitrogen in the sewage into the ammonia nitrogen, simultaneously, an organic carbon source is used as an electron donor, NO 2-N, NO 3-N is converted into N2, and part of the organic carbon source and the ammonia nitrogen are also utilized to synthesize new cell substances;

the second step is that: under the biochemical action of the contact oxidation tank, a certain amount of organic matters and higher ammonia nitrogen still exist in the sewage, so that the organic matters are further oxidized and decomposed, and under the condition that the carbonization action tends to be complete, the sewage in the BOM tank needs to flow back to complete the denitrification process; the method is realized by autotrophic bacteria (nitrifying bacteria), and the autotrophic bacteria utilize an inorganic carbon source generated by the decomposition of organic matters or carbon dioxide in the air as a nutrient source to convert ammonia nitrogen in the sewage into NO 2-N, NO 3-N; the contact oxidation biochemical pool is provided with the filler, and the whole biochemical treatment process is completed by depending on a plurality of microorganisms attached to the filler.
3. The BOM production process of claim 1, wherein in step five, the step of introducing the oxidized water into a high polymer biological membrane tank for treatment comprises the following specific operations:

the first step is as follows: removing biodegradable organic pollutants in water by activated sludge;

the second step is that: performing solid-liquid separation on the purified water and the activated sludge by adopting a biological membrane; the biological membrane can retain activated sludge and most suspended matters to obtain clear effluent;

the third step: continuously shaking the membrane by air with strength in a reasonable range under the biological membrane, returning to a biological contact oxidation pond for secondary treatment by nitrification, and discharging sludge.
4. The BOM production process of claim 1, wherein in the sixth step, the step of introducing the treated water into a clean water tank for treatment comprises the following steps:

the first step is as follows: injecting disinfectant into the clear water tank, stirring, and preparing to introduce treated clear water;

the second step is that: introducing the treated cleaning solution and the disinfectant for mixing, and mixing and stirring the cleaning solution and the disinfectant through a stirring rod to mix the disinfectant with clear water for disinfection treatment;

the third step: and preparing for discharge treatment within a reasonable precipitation time range.
5. The BOM production process of claim 1, wherein in step one, the settling time is set to 12-24 hours.
6. The BOM production process of claim 1, wherein the lifting speed is set to 1-1.5m/min in step three.
7. The BOM production process of claim 1, wherein in step four, an anoxic section is disposed inside the biological contact oxidation tank.
8. The BOM production process of claim 3, wherein in step five, the biological membrane in the second step is a hollow fiber membrane.
9. The BOM production process of claim 3, wherein in step five, the biological membrane in the third step is a hollow fiber membrane, and the air intensity is controlled by an aeration pump.
10. The BOM production process of claim 1, wherein in step six, the sterilizing solution in the first step is chlorine solution.