CN116119799A - Treatment system and method for removing total nitrogen from slaughter wastewater - Google Patents
Treatment system and method for removing total nitrogen from slaughter wastewater Download PDFInfo
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- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Abstract
The invention discloses a treatment system and a method for removing total nitrogen from slaughter wastewater, wherein a collection end collects parameters to establish a comparison coefficient, a treatment end compares the comparison coefficient with a plurality of thresholds, and judges whether the system treats the wastewater according to the result; the wastewater is subjected to nitrification treatment, wherein in the nitrification treatment process, a nitrification coefficient is established by acquisition parameters, the treatment end compares the nitrification coefficient with a first efficiency threshold value, the wastewater is subjected to denitrification treatment, a denitrification coefficient is established by the acquisition parameters, the treatment end compares the denitrification coefficient with a second efficiency threshold value, and corresponding adjustment is made according to a comparison result; according to the invention, the environmental coefficient is established by collecting the parameters before the wastewater is treated, and whether the treatment system can operate is judged by comparing the environmental coefficient with the environmental threshold value, so that the treatment system can treat the wastewater in an optimal operation state, the treatment effect of the treatment system is improved, the treatment efficiency of the system is monitored in real time in the wastewater treatment process, and the stable treatment of the wastewater is ensured.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to a treatment system and a method for removing total nitrogen from slaughter wastewater.
Background
Slaughter wastewater is formed by flushing, leaching, slaughtering and flushing other factory floor, scalding, cutting, processing by staple food, animal residues, blood and the like, excrement remained in the animal body and blood generated in the slaughter process are very high in ammonia nitrogen content, if the ammonia nitrogen content is not treated, the ammonia nitrogen content is permeated into the ground or flows into a river, water which human beings depend on living is naturally damaged, blue algae breeding is caused, and fish and shrimp in the water die in a large area.
The Chinese patent with the bulletin number of CN113387482B discloses a high ammonia nitrogen wastewater treatment system and a process, which belong to the technical field of ammonia nitrogen wastewater treatment, and comprise a heavy metal sedimentation tank, a plate-and-frame filter press, a slat type aeration tower, a folding point chlorination device and a residual chlorine treatment tank which are sequentially connected, wherein waste gas outlets of the slat type aeration tower, the folding point chlorination device and the residual chlorine treatment tank are all connected with an absorption tower, and a first electrode ammonia nitrogen on-line monitor is arranged between the slat type aeration tower and the folding point chlorination device.
The prior art has the following defects:
1. the existing treatment system adopts a biological method to remove total nitrogen from slaughter wastewater, and when the waste water is treated by the biological method, the total nitrogen in the waste water is mainly removed by the cooperation of nitrifying bacteria and denitrifying bacteria, however, when the slaughter wastewater is treated by the existing treatment system, the treatment environment of the waste water is not detected in advance, so that the activity of nitrifying bacteria and denitrifying bacteria can not reach the requirement in the slaughter wastewater treatment process, and the total nitrogen removal effect of the slaughter wastewater is reduced;
2. as nitrifying bacteria are good itch bacteria and denitrifying bacteria are anaerobic bacteria, the two have different demands on the dissolved oxygen in the wastewater, and the existing treatment system can not regulate the content of the dissolved oxygen in the wastewater well during the treatment of the wastewater, thereby leading to low wastewater treatment efficiency.
Disclosure of Invention
The invention aims to provide a treatment system and a method for removing total nitrogen from slaughter wastewater, which are used for solving the defects in the background technology.
In order to achieve the above object, the present invention provides the following technical solutions: a method of treating slaughter wastewater to remove total nitrogen, the method comprising the steps of:
s1: the acquisition end acquires parameters to establish comparison coefficients, the processing end compares the comparison coefficients with a plurality of thresholds, and whether the system processes wastewater is judged according to the results;
s2: after the wastewater is determined to be treated, the wastewater enters a pretreatment mechanism to adjust the temperature and the pH value once;
s3: the wastewater is subjected to nitrification treatment, in the nitrification treatment process, a nitrification coefficient is established by collecting parameters, the nitrification coefficient is compared with a first efficiency threshold value by a treatment end, and corresponding adjustment is made according to a comparison result;
s4: returning the wastewater to the pretreatment mechanism for secondary temperature adjustment and pH value adjustment after the wastewater is nitrified;
s5: performing denitrification treatment on the wastewater, establishing a denitrification coefficient by collecting parameters, comparing the denitrification coefficient with a second efficiency threshold value by a treatment end, and correspondingly adjusting according to a comparison result;
s6: gaseous nitrogen generated by the wastewater after denitrification treatment is recovered through a nitrogen recovery system, the wastewater is returned to be reprocessed after reaching the detection standard, and the wastewater is discharged through a drainage pipeline after reaching the detection standard.
Preferably, in step S1, the comparison between the comparison coefficient and the plurality of thresholds is established, and whether the system processes the wastewater is judged according to the result, which specifically includes the following steps:
s1.1: the method comprises the steps that an acquisition end acquires initial wastewater temperature, initial wastewater pH value, wastewater flow, pipeline air density, equipment aging rate and equipment crack rate;
s1.2: the initial temperature of the wastewater, the initial pH value of the wastewater and the wastewater flow are respectively calibrated to Cswd, cpHz, fsli;
s1.3: carrying out dimensionless calculation on the initial temperature of the wastewater, the initial pH value of the wastewater and the wastewater flow, and establishing a first environment coefficient Yxs, wherein the expression is as follows:
Yxs＝a 1 Cswd+a 2 CpHz+a 3 Fsli
wherein a is 1 、a 2 、a 3 The ratio coefficients of the initial temperature of the wastewater, the initial pH value of the wastewater and the wastewater flow are respectively a 1 、a 2 、a 3 Are all greater than 0, and a 1 >a 2 >a 3 。
Preferably, step S1 further comprises S1.4: the air density of the pipeline, the equipment aging rate and the equipment cracking rate are respectively calibrated to be Qmd, lhl, lfl;
s1.5: carrying out dimensionless calculation on the air density of the pipeline, the equipment aging rate and the equipment cracking rate, and establishing a second environment coefficient Rxs, wherein the expression is as follows:
in the formula e 1 、e 2 、e 3 The air density of the pipeline, the equipment aging rate and the equipment cracking rate are respectively proportional coefficients, e 1 、e 2 、e 3 Are all greater than 0, and a 1 >a 3 >a 2 ；
S1.6: comparing the first environmental coefficient Yxs to an environmental threshold, the environmental threshold comprising a threshold M and a threshold N, and N < M, when N < Yxs < M, the wastewater is treated by the treatment system;
s1.7: and comparing the second environmental coefficient Rxs with a health threshold G, and when Rxs is more than or equal to G, treating the wastewater by the treatment system.
Preferably, the step S2 specifically includes the following steps:
s2.1: collecting single wastewater inlet amount, single wastewater treatment amount and equipment heat loss rate;
s2.2: the single wastewater inlet amount, the single wastewater treatment amount and the equipment heat loss rate are respectively calibrated to be Hdl, cli, rsl;
s2.3: establishing a nitrification coefficient Xhxs by normalizing the single wastewater inlet amount, the single wastewater treatment amount and the equipment heat loss rate, wherein the expression is as follows:
in the formula g 1 、g 2 、g 3 Respectively single wastewater inlet amount and single wastewater treatment amountAnd the proportionality coefficient of the heat loss rate of the equipment, C is an error correction factor and is a constant larger than 0, g 1 、g 2 、g 3 Are all greater than 0 and g 1 >g 2 >g 3 ；
S2.4: if the nitrification coefficient Xhxs is smaller than the first efficiency threshold, the investment of nitrifying bacteria is required to be increased, the heat preservation performance of the equipment is improved, and the nitrification treatment efficiency of the wastewater is ensured.
Preferably, the step S5 specifically includes the following steps:
s5.1: collecting the denitrification temperature of the wastewater and the content of trace elements in the wastewater, and respectively calibrating the denitrification temperature and the content of trace elements in the wastewater as Xhwd and Wlys;
s5.2: establishing a denitrification coefficient Fhxs by normalizing the denitrification temperature of the wastewater and the content of trace elements of the wastewater, wherein the expression is as follows:
wherein y is 1 、y 2 The denitrification temperature of the wastewater and the proportion coefficient of the trace element content of the wastewater are respectively, y 1 、y 2 Are all greater than 0, and y 1 <y 2 ；
S5.3: if the denitrification coefficient Fhxs is lower than the second efficiency threshold, cooling treatment is needed to be carried out on the wastewater, and trace elements are added into the wastewater to ensure the activity of denitrifying bacteria.
The invention also provides a treatment system for removing total nitrogen from slaughter wastewater, which comprises a pretreatment mechanism, wherein the water outlet end of the pretreatment mechanism is provided with a nitrification reaction tower and a denitrification reaction tower, the nitrification reaction tower is communicated with the water inlet end of the pretreatment mechanism through a water suction pump, the water outlet end of the nitrification reaction tower is respectively communicated with the water outlet end of the pretreatment mechanism and the water inlet end of the denitrification reaction tower through a three-way valve, the water outlet end of the denitrification reaction tower is provided with a wastewater detector, the water outlet end of the wastewater detector is respectively communicated with a water drain pipeline and the water inlet end of the pretreatment mechanism through a three-way valve, wastewater after primary treatment of the pretreatment mechanism enters the nitrification reaction tower for nitrification treatment, the wastewater after the nitrification treatment returns to the pretreatment mechanism for secondary treatment and is discharged into the denitrification reaction tower for denitrification treatment, and after detection through the wastewater detector, the wastewater returns to the pretreatment mechanism or is discharged through the water drain pipeline.
Preferably, an aeration tank and a filter press are also sequentially communicated between the pretreatment mechanism and the nitration reaction tower, the aeration tank is used for increasing the oxygen content of the wastewater, and the filter press is used for filtering the particulate impurities in the wastewater;
the aeration assembly, the motor and the connecting pipe are arranged on the aeration tank, the connecting pipe penetrates through the inner wall of the aeration tank, the aeration assembly is rotationally connected with the connecting pipe, the motor is fixed on one side, far away from the connecting pipe, of the aeration tank, and the aeration assembly is in transmission connection with the motor;
the aeration machine through pipe connecting pipe supplies oxygen for the aeration component, the motor drives the aeration component to rotate, and after the oxygen is discharged from the aeration component, the oxygen is mixed into the wastewater by the rotating aeration component.
Preferably, the aeration assembly comprises a sleeve, a plurality of convex pipes and a plurality of aeration pipes, wherein the plurality of convex pipes are arranged, the plurality of aeration pipes are arranged in groups, the sleeve is sleeved outside the end part of the connecting pipe through a sealing bearing, the plurality of convex pipes are communicated with the sleeve and are distributed in a central symmetry mode relative to the sleeve, the aeration pipes are fixedly communicated and arranged on one side of the convex pipes, each group of aeration pipes are arranged in a plurality of groups, and the plurality of aeration pipes are distributed in an equidistant path array relative to the convex pipes;
the motor drives the sleeve to rotate, and the sleeve drives the aeration pipe to rotate through the convex pipe, so that the aeration assembly is enabled to dynamically supplement oxygen into the wastewater.
Preferably, the pretreatment mechanism comprises a temperature regulator and a pH value regulator, the temperature regulator is communicated with the pH value regulator, the temperature regulator is used for regulating the temperature of the wastewater, and the pH value regulator is used for regulating the pH value of the wastewater;
the denitrification reaction tower is also provided with a sludge discharge end, the sludge discharge end is communicated with a sludge dewatering device, and sludge in the wastewater is pumped into the sludge dewatering device through a sludge pump to be dewatered and then discharged.
Preferably, the treatment system treats wastewater comprising the steps of:
after the wastewater enters a temperature regulator and a pH value regulator to regulate the temperature and the pH value, when the wastewater is detected by a temperature sensor and a pH value detector to be in failure of the treatment standard of the nitration reaction tower, the wastewater returns to the water inlet end of the temperature regulator through a four-way valve to be circularly regulated, and after the wastewater reaches the treatment standard, the wastewater enters an aeration tank to be treated through the four-way valve;
the wastewater is returned to the water inlet end of the temperature regulator through a water suction pump after the nitration reaction of the nitration reaction tower, when the temperature and the pH value are regulated again and meet the treatment standard of the denitrification reaction tower, the wastewater directly enters the denitrification reaction tower for treatment through a four-way valve, gaseous nitrogen generated by treatment is recovered by a nitrogen recovery system, and sludge enters a sludge dewatering device for treatment;
when the wastewater treated by the denitrification reaction tower is detected by the wastewater detector to not reach the discharge standard, the wastewater returns to the water inlet end of the temperature regulator through the three-way valve and is circularly treated by the treatment system until the wastewater detected by the wastewater detector reaches the discharge standard, and the wastewater enters the drainage pipeline through the three-way valve to be discharged.
In the technical scheme, the invention has the technical effects and advantages that:
1. according to the invention, the environmental coefficient is established by collecting the parameters before the wastewater is treated, and whether the treatment system can operate is judged by comparing the environmental coefficient with the environmental threshold value, so that the treatment system can treat the wastewater in an optimal operation state, the treatment effect of the treatment system is improved, the treatment efficiency of the system is monitored in real time in the wastewater treatment process, and the stable treatment of the wastewater is ensured.
2. The invention establishes the first environmental coefficient and the second environmental coefficient by collecting the wastewater and a plurality of constants of equipment in the treatment system, and evaluates whether the treatment system can efficiently treat the wastewater and ensures the stable operation of the treatment system by comparing the first environmental coefficient and the second environmental coefficient with the threshold value.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.
Fig. 1 is a schematic diagram of a system structure according to the present invention.
Fig. 2 is a flow chart of the method of the present invention.
Fig. 3 is a longitudinal sectional view of the aeration tank of the present invention.
Fig. 4 is a schematic view of the structure of the aeration assembly of the present invention.
FIG. 5 is a flow chart of wastewater treatment according to the present invention.
Reference numerals illustrate:
1. a temperature regulator; 2. a pH adjustor; 3. an aeration tank; 31. an aeration assembly; 311. a sleeve; 312. a convex tube; 313. an aeration pipe; 32. a motor; 33. a connecting pipe; 331. a one-way valve; 4. a filter press; 5. a nitration reaction tower; 6. a denitrification reaction tower; 7. a sludge dewatering device; 8. a waste water detector.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Example 1
Referring to fig. 2, the treatment method for removing total nitrogen from slaughter wastewater according to the embodiment includes the following steps:
the method comprises the steps that a comparison coefficient is established by collecting parameters at a collecting end, the comparison coefficient is compared with a plurality of thresholds by a processing end, whether the system can treat wastewater or not is judged according to results, after the wastewater can be treated is confirmed, the wastewater enters a pretreatment mechanism for once adjusting temperature and pH value, after the wastewater is properly adjusted, the wastewater is subjected to nitrification treatment, the nitrification coefficient is established by the collecting parameters in the nitrification treatment process, the nitrification coefficient is compared with a first efficiency threshold by the processing end, corresponding adjustment is made according to comparison results, the wastewater is returned to a pretreatment mechanism for secondarily adjusting the temperature and the pH value after the nitrification treatment, denitrification is carried out on the wastewater after the denitrification is properly adjusted, the denitrification coefficient is established by the collecting parameters, the corresponding adjustment is made according to comparison results, gaseous nitrogen generated by the wastewater after the denitrification treatment is recycled through a nitrogen recovery system, the wastewater is detected to be not up to standard and returns to the pretreatment, and the wastewater is detected to be up to standard and is directly discharged.
The processing system establishes the environmental coefficient by collecting parameters before processing the wastewater, and judges whether the processing system can operate or not by comparing the environmental coefficient with the environmental threshold value, so that the processing system processes the wastewater in an optimal operation state, the processing effect of the processing system is improved, the processing efficiency of the system is monitored in real time in the process of processing the wastewater, and the stable processing of the wastewater is ensured.
The acquisition end acquires parameters to establish a comparison coefficient, the processing end compares the comparison coefficient with a plurality of thresholds, and judges whether the system can treat wastewater according to the result, wherein the method specifically comprises the following steps:
1) The method comprises the steps that an acquisition end acquires initial wastewater temperature, initial wastewater pH value, wastewater flow, pipeline air density, equipment aging rate and equipment crack rate;
2) The initial temperature of the wastewater, the initial pH value of the wastewater and the wastewater flow are respectively calibrated to Cswd, cpHz, fsli;
3) Carrying out dimensionless calculation on the initial temperature of the wastewater, the initial pH value of the wastewater and the wastewater flow, and establishing a first environment coefficient Yxs, wherein the expression is as follows:
Yxs＝a 1 Cswd+a 2 CpHz+a 3 Fsli
wherein a is 1 、a 2 、a 3 The ratio coefficients of the initial temperature of the wastewater, the initial pH value of the wastewater and the wastewater flow are respectively a 1 、a 2 、a 3 Are all greater than 0, and a 1 >a 2 >a 3 ；
4) The air density of the pipeline, the equipment aging rate and the equipment cracking rate are respectively calibrated to be Qmd, lhl, lfl;
5) Carrying out dimensionless calculation on the air density of the pipeline, the equipment aging rate and the equipment cracking rate, and establishing a second environment coefficient Rxs, wherein the expression is as follows:
in the formula e 1 、e 2 、e 3 The air density of the pipeline, the equipment aging rate and the equipment cracking rate are respectively proportional coefficients, e 1 、e 2 、e 3 Are all greater than 0, and a 1 >a 3 >a 2 ；
6) Comparing the first environmental coefficient Yxs to an environmental threshold, the environmental threshold comprising a threshold M and a threshold N, and N < M, when N < Yxs < M, the wastewater being treatable by the treatment system;
7) Comparing the second environmental factor Rxs to the health threshold G, when Rxs is greater than or equal to G, the treatment system can treat the wastewater.
In the step 1), the initial temperature of the wastewater is collected through a temperature sensor, the initial pH value of the wastewater is collected through a pH detector, and the flow rate of the wastewater is collected through a flowmeter, so that when M is less than or equal to Yxs, the nitrifying bacteria or denitrifying bacteria cannot survive in the wastewater, and when N is more than or equal to Yxs, the activity of the nitrifying bacteria or denitrifying bacteria in the wastewater is too low, and the treatment effect cannot be achieved.
In the step 1), the air density of the pipeline is acquired by an air pressure sensor, and the equipment aging rate is calculated by the formula: aging rate = total operating time of the device/time of the device being put into service, the crack rate of the device being detected by manual use of an ultrasonic detector, when the crack rate of the device is too high, indicating that the device is at risk of leakage, therefore, when Rxs < G, indicating that the sewage treatment device in the treatment system does not meet the use standard.
If M is less than or equal to Yxs or N is more than or equal to Yxs, the wastewater needs to enter a pretreatment mechanism for cyclic treatment until N is less than Yxs and the treatment system starts to operate;
if Rxs < G conditions exist, the sewage treatment equipment of the treatment system needs to be comprehensively overhauled or maintained by overhaulers until Rxs is more than or equal to G, and the treatment system is put into use.
In this embodiment, the first environmental coefficient and the second environmental coefficient are established by collecting the wastewater and a plurality of constants of the equipment in the treatment system, and by comparing the first environmental coefficient and the second environmental coefficient with the threshold value, whether the treatment system can efficiently treat the wastewater is evaluated, and the stable operation of the treatment system is ensured.
Example 2
The wastewater is subjected to nitrification treatment, in the nitrification treatment process, the nitrification coefficient is established by collecting parameters, the nitrification coefficient is compared with a first efficiency threshold value by a treatment end, corresponding adjustment is made according to a comparison result, and the method specifically comprises the following steps:
8) Collecting single wastewater inlet amount, single wastewater treatment amount and equipment heat loss rate;
9) The single wastewater inlet amount, the single wastewater treatment amount and the equipment heat loss rate are respectively calibrated to be Hdl, cli, rsl;
10 Establishing a nitrification coefficient Xhxs by normalizing the single wastewater inlet amount, the single wastewater treatment amount and the equipment heat loss rate, wherein the expression is as follows:
in the formula g 1 、g 2 、g 3 The ratio coefficients of single wastewater inlet amount, single wastewater treatment amount and equipment heat loss rate are respectively, C is an error correction factor and is a constant larger than 0, g 1 、g 2 、g 3 Are all greater than 0 and g 1 >g 2 >g 3 ；
11 If the nitrification coefficient Xhxs is smaller than the first efficiency threshold, the investment of nitrifying bacteria is required to be increased, the heat preservation performance of the equipment is improved, and the nitrification treatment efficiency of the wastewater is ensured.
The method specifically comprises the following steps of:
12 Collecting the denitrification temperature of the wastewater and the content of trace elements in the wastewater, and respectively calibrating the denitrification temperature and the content of trace elements in the wastewater as Xhwd and Wlys;
13 The denitrification temperature of the wastewater and the content of trace elements of the wastewater are normalized to establish a denitrification coefficient Fhxs, and the expression is as follows:
wherein y is 1 、y 2 The denitrification temperature of the wastewater and the proportion coefficient of the trace element content of the wastewater are respectively, y 1 、y 2 Are all greater than 0, and y 1 <y 2 ；
14 If the denitrification coefficient Fhxs is lower than the second efficiency threshold, cooling treatment is needed to be carried out on the wastewater, and microelements (potassium, iron, calcium, sulfur, magnesium and the like) are added into the wastewater to ensure the activity of denitrifying bacteria.
In step 14), since denitrifying bacteria are anaerobic bacteria, when the temperature of wastewater increases, the dissolved oxygen content in the wastewater increases, which reduces the reaction efficiency of denitrifying bacteria, and thus, by reducing the temperature of wastewater, the dissolved oxygen content is reduced.
Example 3
Referring to fig. 1, the treatment system for removing total nitrogen from slaughter wastewater in this embodiment includes a pretreatment mechanism, unlike the prior art, in which, a water outlet end of the pretreatment mechanism is provided with a nitrification reaction tower 5 and a denitrification reaction tower 6, the nitrification reaction tower 5 is communicated with a water inlet end of the pretreatment mechanism by a water suction pump, a water outlet end of the nitrification reaction tower 5 is respectively communicated with a water outlet end of the pretreatment mechanism and a water inlet end of the denitrification reaction tower 6 by a three-way valve, a water outlet end of the denitrification reaction tower 6 is provided with a wastewater detector 8, a water outlet end of the wastewater detector 8 is respectively communicated with a water inlet end of the pretreatment mechanism by a three-way valve, wastewater after primary treatment of the pretreatment mechanism enters the nitrification reaction tower 5, the wastewater after the nitrification treatment returns to the denitrification reaction tower 6 for secondary treatment, and after detection by the wastewater detector 8, the wastewater returns to the pretreatment mechanism or is discharged by the water outlet pipe.
Wherein, waste water detector 8 detects waste water and does not reach standard, and waste water returns pretreatment mechanism cyclic treatment, and waste water detector 8 detects waste water and reaches standard, and waste water passes through the drainage pipe and discharges.
An aeration tank 3 and a filter press 4 are also sequentially communicated between the pretreatment mechanism and the nitration reaction tower 5, the aeration tank 3 is used for increasing the oxygen content of the wastewater, and the filter press 4 is used for filtering particulate impurities in the wastewater.
Referring to fig. 3 and 4, an aeration assembly 31, a motor 32 and a connecting tube 33 are disposed on the aeration tank 3, the connecting tube 33 penetrates through the inner wall of the aeration tank 3, the aeration assembly 31 is rotatably connected with the connecting tube 33, the motor 32 is fixed on one side of the aeration tank 3 away from the connecting tube 33, and the aeration assembly 31 is in transmission connection with the motor 32;
during aeration treatment, the aeration machine through pipe connecting pipe 33 supplies oxygen to the aeration assembly 31, the motor 32 drives the aeration assembly 31 to rotate, and after the oxygen is discharged from the aeration assembly 31, the oxygen is mixed into the wastewater by stirring of the rotating aeration assembly 31, so that the dissolved oxygen of the wastewater is improved, and the activity of nitrifying bacteria can be further improved after the dissolved oxygen of the wastewater is increased because nitrifying bacteria are aerobic bacteria.
The end part of the connecting pipe 33 is fixedly provided with a one-way valve 331, and the one-way valve 331 is used for preventing waste water from entering the connecting pipe 33;
the aeration assembly 31 comprises a sleeve 311, a plurality of convex pipes 312 and aeration pipes 313, wherein the plurality of convex pipes 312 are arranged, the plurality of aeration pipes 313 are arranged in a plurality of groups, the sleeve 311 is sleeved outside the end part of the connecting pipe 33 through a sealing bearing, the plurality of convex pipes 312 are communicated with the sleeve 311, the convex pipes 312 are distributed in a central symmetry manner with respect to the sleeve 311, the aeration pipes 313 are fixedly communicated and arranged on one side of the convex pipes 312, each group of aeration pipes 313 is arranged in a plurality of groups, and the plurality of aeration pipes 313 are distributed in an equidistant path array with respect to the convex pipes 312;
when in use, the motor 32 drives the sleeve 311 to rotate, the sleeve 311 drives the aeration pipe 313 to rotate through the convex pipe 312, so that the aeration component 31 is enabled to dynamically supplement oxygen into the wastewater, and the efficiency is high and the effect is good.
The pretreatment mechanism comprises a temperature regulator 1 and a pH value regulator 2, wherein the temperature regulator 1 is communicated with the pH value regulator 2, the temperature regulator 1 is used for regulating the temperature of wastewater, and the pH value regulator 2 is used for regulating the pH value of wastewater.
The denitrification reaction tower 6 is also provided with a sludge discharge end, the sludge discharge end is communicated with a sludge dewatering device 7, and sludge in the wastewater is pumped into the sludge dewatering device 7 through a sludge pump to be dewatered and then discharged.
Referring to fig. 1 and 5, the treatment system treats wastewater in several operating states:
(1) After the wastewater enters the temperature regulator 1 and the pH value regulator 2 to regulate the temperature and the pH value, when the wastewater is detected by the temperature sensor and the pH value detector to be in failure of the treatment standard of the nitration reaction tower, the wastewater returns to the water inlet end of the temperature regulator 1 through the four-way valve to be circularly regulated, and after the wastewater reaches the treatment standard, the wastewater enters the aeration tank 3 through the four-way valve to be treated;
(2) After the wastewater is subjected to nitration reaction in the nitration reaction tower 5, the wastewater returns to the water inlet end of the temperature regulator 1 through a water suction pump, when the temperature and the pH value are regulated again and meet the treatment standard of the denitrification reaction tower 6, the wastewater directly enters the denitrification reaction tower 6 for treatment through a four-way valve, gaseous nitrogen generated by treatment is recovered by a nitrogen recovery system, and sludge enters a sludge dewatering device 7 for treatment;
(3) When the wastewater treated by the denitrification reaction tower 6 is detected by the wastewater detector 8 to not reach the discharge standard, the wastewater returns to the water inlet end of the temperature regulator 1 through the three-way valve and is circularly treated by the treatment system until the wastewater detector 8 detects that the wastewater reaches the discharge standard, and the wastewater enters the drainage pipeline through the three-way valve to be discharged.
The above embodiments may be implemented in whole or in part by software, hardware, firmware, or any other combination. When implemented in software, the above-described embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer instructions or computer programs. When the computer instructions or computer program are loaded or executed on a computer, the processes or functions described in accordance with the embodiments of the present application are all or partially produced. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website site, computer, server, or data center to another website site, computer, server, or data center by wired (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains one or more sets of available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. The semiconductor medium may be a solid state disk.
It should be understood that the term "and/or" is merely an association relationship describing the associated object, and means that three relationships may exist, for example, a and/or B may mean: there are three cases, a alone, a and B together, and B alone, wherein a, B may be singular or plural. In addition, the character "/" herein generally indicates that the associated object is an "or" relationship, but may also indicate an "and/or" relationship, and may be understood by referring to the context.
In the present application, "at least one" means one or more, and "a plurality" means two or more. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b, or c may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or plural.
It should be understood that, in various embodiments of the present application, the sequence numbers of the foregoing processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic thereof, and should not constitute any limitation on the implementation process of the embodiments of the present application.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.
In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a read-only memory (ROM), a random access memory (random access memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A treatment method for removing total nitrogen from slaughter wastewater is characterized by comprising the following steps: the processing method comprises the following steps:
s1: the acquisition end acquires parameters to establish comparison coefficients, the processing end compares the comparison coefficients with a plurality of thresholds, and whether the system processes wastewater is judged according to the results;
s2: after the wastewater is determined to be treated, the wastewater enters a pretreatment mechanism to adjust the temperature and the pH value once;
s3: the wastewater is subjected to nitrification treatment, in the nitrification treatment process, a nitrification coefficient is established by collecting parameters, the nitrification coefficient is compared with a first efficiency threshold value by a treatment end, and corresponding adjustment is made according to a comparison result;
s4: returning the wastewater to the pretreatment mechanism for secondary temperature adjustment and pH value adjustment after the wastewater is nitrified;
s5: performing denitrification treatment on the wastewater, establishing a denitrification coefficient by collecting parameters, comparing the denitrification coefficient with a second efficiency threshold value by a treatment end, and correspondingly adjusting according to a comparison result;
s6: gaseous nitrogen generated by the wastewater after denitrification treatment is recovered through a nitrogen recovery system, the wastewater is returned to be reprocessed after reaching the detection standard, and the wastewater is discharged through a drainage pipeline after reaching the detection standard.
2. The method for treating slaughter wastewater to remove total nitrogen according to claim 1, wherein: in step S1, the comparison between the comparison coefficient and the plurality of thresholds is established, and whether the system processes the wastewater is judged according to the result, specifically including the following steps:
s1.1: the method comprises the steps that an acquisition end acquires initial wastewater temperature, initial wastewater pH value, wastewater flow, pipeline air density, equipment aging rate and equipment crack rate;
s1.2: the initial temperature of the wastewater, the initial pH value of the wastewater and the wastewater flow are respectively calibrated to Cswd, cpHz, fsli;
s1.3: carrying out dimensionless calculation on the initial temperature of the wastewater, the initial pH value of the wastewater and the wastewater flow, and establishing a first environment coefficient Yxs, wherein the expression is as follows:
Yxs＝a 1 Cswd+a 2 CpHz+a 3 Fsli
wherein a is 1 、a 2 、a 3 The ratio coefficients of the initial temperature of the wastewater, the initial pH value of the wastewater and the wastewater flow are respectively a 1 、a 2 、a 3 Are all greater than 0, and a 1 >a 2 >a 3 。
3. A method for treating slaughter wastewater to remove total nitrogen according to claim 2, wherein: step S1 further comprises S1.4: the air density of the pipeline, the equipment aging rate and the equipment cracking rate are respectively calibrated to be Qmd, lhl, lfl;
s1.5: carrying out dimensionless calculation on the air density of the pipeline, the equipment aging rate and the equipment cracking rate, and establishing a second environment coefficient Rxs, wherein the expression is as follows:
in the formula e 1 、e 2 、e 3 The air density of the pipeline, the equipment aging rate and the equipment cracking rate are respectively proportional coefficients, e 1 、e 2 、e 3 Are all greater than 0, and a 1 >a 3 >a 2 ；
S1.6: comparing the first environmental coefficient Yxs to an environmental threshold, the environmental threshold comprising a threshold M and a threshold N, and N < M, when N < Yxs < M, the wastewater is treated by the treatment system;
s1.7: and comparing the second environmental coefficient Rxs with a health threshold G, and when Rxs is more than or equal to G, treating the wastewater by the treatment system.
4. The method for treating slaughter wastewater to remove total nitrogen according to claim 1, wherein: the step S2 specifically comprises the following steps:
s2.1: collecting single wastewater inlet amount, single wastewater treatment amount and equipment heat loss rate;
s2.2: the single wastewater inlet amount, the single wastewater treatment amount and the equipment heat loss rate are respectively calibrated to be Hdl, cli, rsl;
s2.3: establishing a nitrification coefficient Xhxs by normalizing the single wastewater inlet amount, the single wastewater treatment amount and the equipment heat loss rate, wherein the expression is as follows:
in the formula g 1 、g 2 、g 3 The ratio coefficients of single wastewater inlet amount, single wastewater treatment amount and equipment heat loss rate are respectively, C is an error correction factor and is more than 0Constant g of (2) 1 、g 2 、g 3 Are all greater than 0 and g 1 >g 2 >g 3 ；
S2.4: if the nitrification coefficient Xhxs is smaller than the first efficiency threshold, the investment of nitrifying bacteria is required to be increased, the heat preservation performance of the equipment is improved, and the nitrification treatment efficiency of the wastewater is ensured.
5. The method for treating slaughter wastewater to remove total nitrogen according to claim 1, wherein: the step S5 specifically comprises the following steps:
s5.1: collecting the denitrification temperature of the wastewater and the content of trace elements in the wastewater, and respectively calibrating the denitrification temperature and the content of trace elements in the wastewater as Xhwd and Wlys;
s5.2: establishing a denitrification coefficient Fhxs by normalizing the denitrification temperature of the wastewater and the content of trace elements of the wastewater, wherein the expression is as follows:
wherein y is 1 、y 2 The denitrification temperature of the wastewater and the proportion coefficient of the trace element content of the wastewater are respectively, y 1 、y 2 Are all greater than 0, and y 1 <y 2 ；
S5.3: if the denitrification coefficient Fhxs is lower than the second efficiency threshold, cooling treatment is needed to be carried out on the wastewater, and trace elements are added into the wastewater to ensure the activity of denitrifying bacteria.
6. A slaughter wastewater total nitrogen removal treatment system for implementing the treatment method according to any one of claims 1 to 5, comprising a pretreatment mechanism, characterized in that: the water outlet end of the pretreatment mechanism is provided with a nitrification reaction tower (5) and a denitrification reaction tower (6), the nitrification reaction tower (5) is communicated with the water inlet end of the pretreatment mechanism through a water suction pump, the water outlet end of the nitrification reaction tower (5) is respectively communicated with the water outlet end of the pretreatment mechanism and the water inlet end of the denitrification reaction tower (6) through a three-way valve, the water outlet end of the denitrification reaction tower (6) is provided with a wastewater detector (8), the water outlet end of the wastewater detector (8) is respectively communicated with a drainage pipeline and the water inlet end of the pretreatment mechanism through a three-way valve, wastewater after primary treatment of the pretreatment mechanism enters the nitrification reaction tower (5) for nitrification treatment, and after secondary treatment of the pretreatment mechanism, the wastewater after the nitrification treatment is returned to the denitrification reaction tower (6) for denitrification treatment, and after detection by the wastewater detector (8), the wastewater returns to the pretreatment mechanism or is discharged through the drainage pipeline.
7. A slaughter wastewater total nitrogen removal treatment system according to claim 6, wherein: an aeration tank (3) and a filter press (4) are sequentially communicated between the pretreatment mechanism and the nitration reaction tower (5), the aeration tank (3) is used for increasing the oxygen content of the wastewater, and the filter press (4) is used for filtering particle impurities in the wastewater;
an aeration assembly (31), a motor (32) and a connecting pipe (33) are arranged on the aeration tank (3), the connecting pipe (33) penetrates through the inner wall of the aeration tank (3), the aeration assembly (31) is rotationally connected with the connecting pipe (33), the motor (32) is fixed on one side, far away from the connecting pipe (33), of the aeration tank (3), and the aeration assembly (31) is in transmission connection with the motor (32);
the aeration machine through pipe connecting pipe (33) supplies oxygen for the aeration component (31), the motor (32) drives the aeration component (31) to rotate, and after the oxygen is discharged from the aeration component (31), the oxygen is stirred and mixed into the wastewater by the rotating aeration component (31).
8. A slaughter wastewater total nitrogen removal treatment system according to claim 7, wherein: the aeration assembly (31) comprises a sleeve (311), a plurality of convex pipes (312) and aeration pipes (313), wherein the plurality of convex pipes (312) are arranged, the plurality of aeration pipes (313) are arranged in a plurality of groups, the sleeve (311) is sleeved outside the end part of the connecting pipe (33) through a sealing bearing, the plurality of convex pipes (312) are communicated with the sleeve (311), the convex pipes (312) are distributed in a central symmetry mode relative to the sleeve (311), the aeration pipes (313) are fixedly communicated and arranged on one side of the convex pipes (312), each group of aeration pipes (313) is arranged in a plurality of groups, and the plurality of aeration pipes (313) are distributed in an equidistant path array relative to the convex pipes (312);
the motor (32) drives the sleeve (311) to rotate, and the sleeve (311) drives the aeration pipe (313) to rotate through the convex pipe (312), so that the aeration assembly (31) is enabled to dynamically supplement oxygen into the wastewater.
9. A slaughter wastewater total nitrogen removal treatment system according to claim 8, wherein: the pretreatment mechanism comprises a temperature regulator (1) and a pH value regulator (2), wherein the temperature regulator (1) is communicated with the pH value regulator (2), the temperature regulator (1) is used for regulating the temperature of wastewater, and the pH value regulator (2) is used for regulating the pH value of the wastewater;
the denitrification reaction tower (6) is also provided with a sludge discharge end, the sludge discharge end is communicated with a sludge dewatering device (7), and sludge in the wastewater is pumped into the sludge dewatering device (7) through a sludge pump to be dewatered and then discharged.
10. A slaughter wastewater total nitrogen removal treatment system according to claim 9, wherein: the treatment system for treating wastewater comprises the steps of:
after the wastewater enters a temperature regulator (1) and a pH value regulator (2) to regulate the temperature and the pH value, when the wastewater is detected by a temperature sensor and a pH value detector to be in failure of meeting the treatment standard of a nitration reaction tower, the wastewater returns to the water inlet end of the temperature regulator (1) through a four-way valve to be circularly regulated, and after the wastewater reaches the treatment standard, the wastewater enters an aeration tank (3) through the four-way valve to be treated;
the wastewater is returned to the water inlet end of the temperature regulator (1) through a water suction pump after the nitration reaction in the nitration reaction tower (5), when the temperature and the pH value are regulated again and meet the treatment standard of the denitrification reaction tower (6), the wastewater directly enters the denitrification reaction tower (6) for treatment through a four-way valve, gaseous nitrogen generated by treatment is recovered by a nitrogen recovery system, and sludge enters a sludge dewatering device (7) for treatment;
when the wastewater treated by the denitrification reaction tower (6) is detected by the wastewater detector (8) to not reach the discharge standard, the wastewater returns to the water inlet end of the temperature regulator (1) through the three-way valve and is circularly treated by the treatment system until the wastewater detected by the wastewater detector (8) reaches the discharge standard, and then the wastewater enters the drainage pipeline through the three-way valve to be discharged.
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