CN-117776387-B - Integrated autotrophic denitrification device and method

CN117776387BCN 117776387 BCN117776387 BCN 117776387BCN-117776387-B

Abstract

The invention relates to the technical field of high ammonia nitrogen wastewater treatment, in particular to an integrated autotrophic nitrogen removal device and an integrated autotrophic nitrogen removal method, wherein the integrated autotrophic nitrogen removal device comprises a pretreatment component, a short-range nitrification component, an anaerobic ammonia oxidation component, a sludge collection and discharge component, a process isolation component, a recognition monitoring component and a recognition determination component, wherein the recognition determination component analyzes according to an acquired real-time image of anaerobic ammonia oxidation bacteria distribution and sends out a corresponding adjusting signal, or an alarm signal correspondingly adjusts, so that the operation parameters of all components of the device are determined. The invention provides a mode of combining partial short-cut nitrification and anaerobic ammonia oxidation, which can solve the problem of accumulation of anaerobic ammonia oxidation bacteria while realizing partial short-cut nitrification, can provide anaerobic ammonia oxidation bacteria for a short-cut nitrification system, improves denitrification efficiency, and can automatically regulate and control the device, thereby enhancing the operation stability of the device and enabling the device to operate stably for a long time.

Inventors

ZHAO SHUGUANG
FAN XIAOLEI
ZHANG ZHENGQUAN
XU JIANFEI
FU CHAO
YANG CHUANZHONG
ZHANG YONG
Yan Xiangfei
JI HONGTAO
Teng tao
ZHANG LIN
YANG WEIDONG

Assignees

华夏碧水环保科技股份有限公司

Dates

Publication Date: 20260505
Application Date: 20231221

Claims (9)

1. An integrated autotrophic nitrogen removal device is characterized by comprising, The pretreatment component is used for pretreating the wastewater in advance and comprises an adsorption sedimentation tank, a water inlet pump and a pretreatment partition board, wherein the water inlet pump is used for sucking the wastewater adsorbed and consumed by the adsorption sedimentation tank into a device reaction bin, the device reaction bin is divided into different reaction bins according to different wastewater reaction types, and the pretreatment component comprises a first reaction bin and a second reaction bin, an aeration head is arranged between the first reaction bin and the second reaction bin, and the second reaction bin is used for providing a reaction place for anaerobic ammoxidation reaction of the wastewater; a short-cut nitrification component for performing primary treatment of the wastewater; an anaerobic ammonia oxidation assembly for performing a secondary treatment of the wastewater after the primary treatment, the anaerobic ammonia oxidation assembly comprising the second reaction bin and a volcanic biofilter; A collecting and discharging assembly for discharging the sludge which is not separated after the secondary treatment, and collecting and discharging the obtained reclaimed water; a process isolation assembly for separating suspended matter and solid particles in the pretreated wastewater; Identifying a monitoring component comprising an image collector and a timing module; the image collector is arranged in the anaerobic ammonia oxidation assembly and used for monitoring the reaction state in the anaerobic ammonia oxidation assembly in real time; the timing module is used for timing the attached film hanging time of the anaerobic ammonia oxidation bacteria; The identification and determination assembly comprises a fan, an aeration head, a central control analysis module and an adjustment module; the fan is used for controlling the concentration of dissolved oxygen in the volcanic biological filter; The aeration head is used for generating enough mixing effect in the aeration zone and enabling waste water to circularly flow; The central control analysis module is respectively connected with the identification monitoring assembly, the fan and the aeration head, the image collector is used for acquiring a real-time image of the anaerobic ammonia oxidation bacteria distribution, and the central control analysis module analyzes according to the real-time image and sends out a corresponding adjusting signal or an alarm signal; The adjusting module is used for correspondingly adjusting according to various adjusting signals sent by the central control analysis module, and determining the opening number of air holes of the aeration head, the placing position of the aeration head in the aeration zone and the actual rotating speed of the fan; the central control analysis module is internally provided with a monitoring period, standard dispersity and a dispersity evaluation value; the image collector acquires real-time initial images of the red biological film in the second reaction bin at different monitoring moments according to the monitoring period; The central control analysis module can determine the initial dispersity of the anaerobic ammonium oxidation bacteria according to the real-time initial image, and determine whether the attached film state of the anaerobic ammonium oxidation bacteria meets the requirement according to the first difference absolute value and the dispersity evaluation value; Wherein the first absolute value of the difference is the absolute value of the difference between the initial dispersity and the standard dispersity.
2. The integrated autotrophic nitrogen-removing device according to claim 1, wherein, The adsorption sedimentation tank is a pretreatment reaction tank for absorbing and consuming organic matters in the wastewater in advance; the pretreatment partition board is used for carrying out pretreatment separation on suspended matters and solid particles in the wastewater sucked into the reaction bin of the device; The short-cut nitrification component comprises the first reaction bin, a biological film structure and a fixed water distributor, The first reaction bin is used for providing a reaction place for short-range nitration reaction of the wastewater; The fixed water distributor is used for uniformly distributing water flow; the biological film structure is used for adsorbing and decomposing pollutants in suspended, colloid and dissolved states in the wastewater; wherein, the filler in the first reaction bin adopts polyethylene.
3. An integrated autotrophic nitrogen-removal apparatus as defined in claim 2, wherein, The volcanic biofilter is used for intercepting anaerobic ammonia oxidizing bacteria, reducing the loss of the anaerobic ammonia oxidizing bacteria, providing an anaerobic ammonia oxidizing bacteria attached growth and anaerobic environment and playing a role in filtering and adsorbing; wherein, the filler in the volcanic biological filter adopts volcanic; The collecting and sludge discharging assembly comprises a sedimentation tank, a sludge discharging pump and a water outlet pipe; the sedimentation tank is used for collecting wastewater treated by the short-cut nitrification component and the anaerobic ammonia oxidation component; the sludge pump is used for discharging the sludge which is not separated; The water outlet pipe is used for discharging and collecting the reclaimed water obtained after treatment; the process isolation assembly includes a first separator, a second separator, and a pebble layer; the first partition board is used for separating suspended matters and solid particles in the wastewater after the short-cut nitrification treatment; the second partition board is used for separating suspended matters and solid particles in the wastewater after the anaerobic ammonia oxidation treatment; The pebble layer is used for carrying out preliminary filtration on larger suspended matters and solid particles in the wastewater.
4. The integrated autotrophic anammox apparatus of claim 3, wherein, Based on the condition that the attached hanging film state of the anaerobic ammonium oxidation bacteria does not meet the requirement, the central control analysis module can determine to send out a first adjusting signal or send out a second adjusting signal according to the size relation between the initial dispersity and the standard dispersity; The adjusting module can determine the opening number of the air holes of the aeration head according to the first adjusting signal, and can determine the placing position of the aeration head in the aeration zone according to the second adjusting signal.
5. The integrated autotrophic nitrogen-removing device according to claim 4, wherein, Starting the timing module based on the determined opening number of the air holes or the placement position of the aeration head; the image collector acquires a first actual image in the second reaction bin when the timing duration of the timing module reaches the monitoring period; The central control analysis module can determine the actual dispersity of the anaerobic ammonia oxidation bacteria according to the first actual image, and determine the first rotating speed of the fan according to the second difference absolute value and the dispersity evaluation value; Wherein the second absolute value of the difference is the absolute value of the difference between the actual dispersity and the standard dispersity.
6. The integrated autotrophic nitrogen-removing device according to claim 5, wherein, The central control analysis module can acquire real-time distribution areas of the anaerobic ammonia oxidation bacteria at each monitoring moment according to the image collector and the monitoring period, and can calculate the distribution area change rate of each monitoring period according to the real-time distribution areas of adjacent monitoring moments; the central control analysis module can determine the blocking condition of the first partition board according to the distribution area change rate and the maximum rate evaluation value set in the central control analysis module.
7. The integrated autotrophic nitrogen-removing device according to claim 6, wherein, A partition board blockage evaluation interval is arranged in the central control analysis module, wherein a minimum rate evaluation value and a maximum rate evaluation value are respectively the boundary values of the partition board blockage evaluation interval; The central control analysis module can determine the blocking grade of the first partition plate according to the distribution area change rate and the partition plate blocking evaluation value, and determine the second rotating speed of the fan for different blocking grades, or replace the first partition plate.
8. The integrated autotrophic anammox apparatus of claim 7, wherein, The central control analysis module can generate a rate change curve according to the obtained distribution area change rate, and determine the actual fluctuation amplitude according to the rate change curve; the central control analysis module can determine that the running state of the integrated autotrophic nitrogen removal device is good or poor according to the third difference absolute value and the set running stability evaluation value; And the third absolute value of the difference value is the absolute value of the difference value between the actual fluctuation amplitude value and the standard fluctuation amplitude value set by the central control analysis module.
9. A method for integrated autotrophic nitrogen removal, based on the device of any one of claim 1-8, comprising, Step S1, preprocessing the wastewater so as to adsorb and consume organic matters in the wastewater; s2, treating the pretreated wastewater sequentially through a short-cut nitrification stage and an anaerobic ammonia oxidation stage, and carrying part of anaerobic ammonia oxidation bacteria into the short-cut nitrification stage to form a biological film with the AOB bacteria according to the water flow mixing driven by an aeration head; S3, acquiring a real-time image of anaerobic ammonia oxidation bacteria distribution in the second reaction bin, so as to determine the opening number of air holes of the aeration head, the placing position of the aeration head in the aeration zone and the actual rotating speed of the fan; And S4, operating the device with the determined operation parameters to realize high-efficiency denitrification.

Description

Integrated autotrophic denitrification device and method Technical Field The invention relates to the technical field of high ammonia nitrogen wastewater treatment, in particular to an integrated autotrophic nitrogen removal device and method. Background Compared with the traditional nitrification/denitrification process, the short-cut nitrification anaerobic ammonia oxidation can save energy consumption and reduce additional organic matter addition, and is currently widely applied as represented by a partial nitrosation/anaerobic ammonia oxidation (ANAMMOX) process (PN/A) and a whole-process autotrophic denitrification process (short-cut nitrification). However, as the ANAMMOX bacteria are sensitive to environmental factors such as temperature, DO, alkalinity, organic matters and the like, and the generation time is long, the autotrophic denitrification process is poor in stability, and the autotrophic denitrification process is currently used for internationally treating high ammonia nitrogen and low carbon nitrogen ratio wastewater such as landfill leachate, culture wastewater and sludge digestive juice. Aiming at reducing carbon emission in the future, the trend and the requirement of reaching a carbon peak are met, and the energy input is saved in the field of sewage treatment. The greatest difficulty in the engineering application of the anaerobic ammonia oxidation process is that: (1) Because the generation period of the anaerobic ammonia oxidation bacteria is long, how to rapidly and continuously culture and enrich the anaerobic ammonia oxidation bacteria, so that the anaerobic ammonia oxidation bacteria can continuously generate benefit in a large scale is a great difficulty. (2) Because the anaerobic ammonia oxidation bacteria belong to autotrophic bacteria, the existence of organic matters in sewage can promote the proliferation of heterotrophic bacteria, and the organic environment can inhibit the proliferation of the anaerobic ammonia oxidation bacteria, so that the living space of the anaerobic ammonia oxidation is compressed, and the anaerobic ammonia oxidation system is continuously deteriorated and is difficult to keep for a long time. (3) The control difficulty of stable shortcut nitrification is high. CN114105299a discloses a device and a method for strengthening urban sewage carbon source sludge capture and autotrophic and heterotrophic denitrification, belonging to the field of sewage treatment. The urban sewage firstly enters a carbon source capturing reactor, colloid state and partial dissolved state organic matters in the sewage are transferred into sludge through biological adsorption in a short-time low-oxygen aeration process, partial carbon-rich sludge is discharged to a sludge storage tank, then the microbial adsorption capacity is recovered through high-oxygen aeration, supernatant fluid after precipitation enters an autotrophic and heterotrophic denitrification reactor after being regulated by an intermediate water tank, the autotrophic and heterotrophic denitrification reactor adopts an aerobic-anoxic operation mode, partial short-distance nitrification is carried out in an aerobic section with low dissolved oxygen, part of ammonia nitrogen is converted into nitrite, anoxic stirring is carried out, ammonia nitrogen and nitrite are removed through anaerobic ammonia oxidation, and residual nitrite and generated nitrate are reduced into nitrogen by utilizing volatile fatty acid generated by in-situ fermentation of the sludge. The current denitrification device has low denitrification efficiency, does not solve the accumulation problem of anaerobic ammonia oxidation bacteria, and also fails to provide anaerobic ammonia oxidation bacteria for a short-cut nitrification system. Disclosure of Invention Therefore, the invention aims to provide an integrated autotrophic nitrogen removal device and method, which are used for overcoming the problems that the existing nitrogen removal device is low in nitrogen removal efficiency, and the accumulation of anaerobic ammonia oxidation bacteria is not solved, and the anaerobic ammonia oxidation bacteria cannot be provided for a short-cut nitrification system. In order to achieve the above object, the present invention provides an integrated autotrophic nitrogen removal device, comprising, A pretreatment component for pretreating the wastewater in advance; a short-cut nitrification component for performing primary treatment of the wastewater; an anaerobic ammonia oxidation component for performing secondary treatment on the wastewater after the primary treatment; A collecting and discharging assembly for discharging the sludge which is not separated after the secondary treatment, and collecting and discharging the obtained reclaimed water; a process isolation assembly for separating suspended matter and solid particles in the pretreated wastewater; Identifying a monitoring component comprising an image collector and a timing module; the image c