Integrated infrastructure wastewater treatment system

Abstract

This application discloses an integrated infrastructure wastewater treatment system, including an intelligent monitoring unit for controlling wastewater flow and collecting wastewater parameters at different locations, and a classification collection unit comprising collection mechanism A, collection mechanism B, wastewater tank A, wastewater tank, and collection mechanism C for separately collecting mud wastewater, cleaning wastewater, domestic wastewater, chemical wastewater, and surface mixed wastewater generated in the infrastructure construction area; a pretreatment unit, a core treatment unit, an advanced treatment unit, and a reuse and discharge unit. This invention classifies and collects different types of wastewater and sewage, then processes them through pretreatment, core treatment, and advanced treatment units to treat pollutants in different categories step by step. In particular, it innovatively uses feedforward dynamic compensation and dynamic pH monitoring to perform real-time chemical dosing, avoiding problems such as low chemical utilization leading to waste or insufficient chemical addition resulting in poor treatment effects.

Description

Technical Field

[0001] This invention relates to the field of water conservancy infrastructure construction technology, and more particularly to the field of on-site harmless treatment technology for construction wastewater generated by water conservancy infrastructure, specifically to an integrated infrastructure wastewater treatment system. Background Technology

[0002] Construction wastewater is characterized by its complex origins, involving wall-mounting slurry, equipment cleaning, concrete curing, and a variety of pollutants, such as high-turbidity suspended solids, oil, heavy metals, and recalcitrant organic matter. Treatment technologies must balance quality-based classification with efficient synergistic effects. Existing technologies are mostly based on physicochemical treatment and biochemical degradation. Current systems generally employ simple diversion, lacking precise identification of wastewater characteristics. For example, when oily wastewater is mixed with high-turbidity slurry wastewater, the oil film encapsulates suspended solids, leading to a 30%-50% increase in subsequent flocculant dosage. Pretreatment units primarily use a "bar screen + equalization tank," lacking targeted measures for sudden pH changes, such as concrete curing wastewater with a pH of 11-12, and emulsified oil, thus only removing 20%-30% of COD, further increasing the treatment load.

[0003] See Chinese Patent Document 1: CN102557335A discloses a wastewater treatment and reuse process for large-scale engineering construction, particularly suitable for the treatment and reuse of domestic wastewater and industrial sewage generated during the construction phase of large-scale engineering projects. The steps include: wastewater pretreatment; centralized biochemical treatment of wastewater; and advanced treatment and reuse of wastewater. The process involved in this invention is simple, operates stably, has a low cost per ton of water treated, and the treated effluent can be used for toilet flushing, landscaping, concrete mixing, and curing, minimizing water intake and sewage discharge during the construction phase. While this invention addresses similar problems, it is less specific in terms of the types of wastewater it treats. The main wastewater is domestic sewage generated at the construction site, and there is no effective treatment solution for construction-related wastewater with high alkalinity, high heavy metal content, and high chemical residues.

[0004] In view of this, the present invention provides an integrated construction wastewater treatment system specifically designed for construction wastewater treatment, aiming to achieve recycling and harmless discharge through system treatment. Summary of the Invention

[0005] To address the problem that existing infrastructure construction sites generate various types of wastewater and sewage that are difficult to treat and cause varying degrees of environmental pollution after construction, this application provides an integrated infrastructure wastewater treatment system. This system is used to treat various types of sewage and wastewater generated during infrastructure construction in a harmless manner, achieving the goal of reusing and harmlessly discharging the wastewater generated during construction.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0007] An integrated infrastructure wastewater treatment system includes an intelligent monitoring unit for controlling wastewater flow in the system and collecting wastewater parameters at different locations, as well as...

[0008] The classification and collection unit includes collection mechanism A, collection mechanism B, sewage tank A, sewage tank, and collection mechanism C for separately collecting mud wastewater, cleaning wastewater, domestic wastewater, chemical wastewater, and surface mixed wastewater generated in the infrastructure construction area;

[0009] The pretreatment unit includes a bar screen filter for mixing and filtering wastewater from collection mechanism A, collection mechanism B and wastewater tank A, an air flotation oil removal device for mixing and separating oil from wastewater from the wastewater tank and collection mechanism C, and a neutralization reaction tank for temporarily storing the mixed wastewater discharged after treatment by the bar screen filter and air flotation oil removal device.

[0010] The core processing unit includes a high-efficiency flocculation sedimentation tank, a biochemical reaction tank, and an electrochemical oxidation tank connected in sequence, with the neutralization reaction tank connected to the high-efficiency flocculation sedimentation tank.

[0011] The deep treatment unit includes an ultrafiltration reverse osmosis membrane tank, an activated carbon adsorption tower, and an ultraviolet disinfection tank connected in sequence, and the electrochemical oxidation tank is connected to the ultrafiltration reverse osmosis membrane tank.

[0012] The reuse and discharge unit includes an intelligent diversion mechanism and a clean water reuse tank connected to the electrochemical oxidation tank.

[0013] Preferably, the collection mechanism A includes a slurry flocculation device for collecting and temporarily storing formation return mud and a solid-liquid separation device for pressure filtration of the return mud; the collection mechanism B includes a collection tank arranged around the equipment cleaning discharge port and set in a sunken manner to collect cleaning wastewater, the collection tank having a lowest position with a connecting guide pipe, the outlet end of the guide pipe being connected to a rotating screen for dynamic filtration; the rotating screen includes an inclined and rotating screen, the screen having radially arranged spiral baffles inside, and the screen diameter gradually decreasing from top to bottom.

[0014] Preferably, the bar filter device includes a tank for storing mixed wastewater, with an inlet at the top center of the tank and outlets on both sides of the tank, and at least one filter screen vertically installed inside the tank near any outlet.

[0015] Preferably, the neutralization reaction tank is equipped with a pH sensor electrically connected to the intelligent monitoring unit, and the intelligent monitoring unit is also communicatively connected to a dosing mechanism for adding pH adjusting agents to the neutralization reaction tank. The intelligent monitoring unit adjusts the pH value based on the real-time pH value collected by the pH sensor. actual pH value of the system presetset The difference between the values ​​sends a drug delivery signal to the dosing mechanism, and the actual drug delivery amount u(t) of the dosing mechanism is realized through the following dynamic control algorithm.

[0016]

[0017] Where e(t) = pH set -pH actual (t) represents the real-time pH difference; K p K i K d These represent the proportional, integral, and derivative coefficients of the PID control, respectively; α represents the feedforward compensation coefficient, which is determined based on the wastewater flow rate Q and the pollutant concentration C. waste Calculation; Q represents the instantaneous flow rate of wastewater, which is obtained in real time through a flow meter; C waste This represents the initial acid-base equivalent concentration of the wastewater, obtained through experimental calibration or online detection.

[0018] Preferably, the intelligent monitoring unit further includes a dynamic calibration module, which stores a program for dynamically adjusting the proportional, integral, and derivative coefficients of the PID control based on real-time pH difference and rate of change, specifically including the proportional coefficient K. p

[0019] K p =K p0 ·(1+β·|e(t)|

[0020] Among them, K p0 K represents the basic proportionality coefficient, ranging from 0.5 to 2.0; β represents the sensitivity factor, the larger the deviation, the higher the sensitivity factor. p The faster the increase, the faster the response;

[0021] Integral coefficient K i

[0022]

[0023] Among them, K i0 This represents the basic integral coefficient, with a value ranging from 0.5 to 2.0.

[0024] Differential coefficient K d

[0025]

[0026] Among them, K d0 γ represents the fundamental differential coefficient, with a value ranging from 0.1 to 0.5; γ represents the damping factor, which suppresses drastic fluctuations caused by sudden changes.

[0027] More preferably, the intelligent monitoring unit further includes a feedforward compensation optimization module for optimizing the feedforward compensation coefficient α. The feedforward compensation optimization module stores an executable program for determining the feedforward compensation coefficient α. Specifically...

[0028]

[0029] Among them, C target Represents the target neutralization equivalent; C chemical The concentration of the active ingredient in the drug; η represents the reaction efficiency of the drug under actual conditions.

[0030] To improve the flocculation effect of mixed wastewater, reduce the amount of flocculant added, and minimize flocculant residue and waste, preferably, the high-efficiency flocculation sedimentation tank is equipped with a flocculant dispensing mechanism controlled by the intelligent monitoring unit. The flocculant dispensed by the flocculant dispensing mechanism consists of, by weight percentage: 50%-60% polyaluminum chloride, 20%-30% polyferric sulfate, 5%-8% anionic polyacrylamide, 3%-5% amphoteric polyacrylamide, 1%-2% modified nano-silica, 0.5%-1% graphene oxide, 0.5%-1% sodium citrate, and 1%-2% polydimethyldiallylammonium chloride.

[0031] To further enhance the biochemical treatment effect, preferably, multiple Φ25×50mm composite porous conductive biological packing materials are suspended in the biochemical reaction tank by stainless steel mesh cages. The biological packing materials include a skeleton layer made of high-density polyethylene three-dimensional mesh, a porous matrix layer composed of polyurethane foam and activated carbon powder wrapped around the skeleton layer, a bioaffinity layer composed of polyvinyl alcohol gel outside the porous matrix layer, and a conductive functional layer disposed outside the bioaffinity layer to promote electron transfer and accelerate denitrification and anaerobic ammonia oxidation. The conductive functional layer is formed by spraying carbon nanotubes and graphene dispersion in a 1:1 ratio and thermally reducing it at 80°C for 2 hours.

[0032] Beneficial effects:

[0033] 1. This invention collects different types of wastewater and sewage by classification, and then treats the pollutants in different types of wastewater through pretreatment, core treatment and deep treatment units. In particular, it creatively uses feedforward dynamic compensation and dynamic pH monitoring to dosing of agents in real time, so that the wastewater can always be kept near the preset pH value in a short period of time, avoiding the problems of low agent utilization leading to waste of agents or insufficient agent addition leading to poor treatment effect.

[0034] 2. The rotary screen provided by this invention adopts a cone-shaped design. Wastewater containing solids or flocculents enters the screen through the larger diameter end. Under the action of the radial spiral baffle, the wastewater cannot flow quickly along the axial direction of the screen. In addition, the slow rotation of the screen significantly increases the residence time of the wastewater inside the screen, which is beneficial for thorough filtration. Furthermore, the rotation of the screen provides centrifugal force to the wastewater, which can accelerate the filtration of the wastewater and ultimately achieve a better solid-liquid separation effect.

[0035] 3. This invention provides a novel biological filler that uses nano-SiO2 and GO through physical adsorption and chemical bonding (such as Al-O-Si, Fe-OC) to form a "skeleton structure" inside the floc, making the floc denser and increasing the settling speed by 30%-40%. AmPAM maintains its efficient bridging effect under pH fluctuations or high-salt environments, further solving the problem that traditional APAM is prone to failure at pH<6.

[0036] 4. The cationic properties of polydimethyl diallyl ammonium chloride (PDADMAC) protect the flocs from breakage during pumping or stirring, resulting in 50% higher floc strength compared to existing flocculants. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a system framework diagram of the present invention.

[0039] Figure 2 This is a schematic diagram of the hierarchical flow of the system of the present invention.

[0040] Figure 3 This is a schematic diagram of a bar screen filter device. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0042] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0043] Example 1:

[0044] This embodiment provides an integrated infrastructure wastewater treatment system. The system framework and working hierarchy are shown in the diagram below. Figures 1-2 As shown, it includes an intelligent monitoring unit for controlling wastewater flow in the system and collecting wastewater parameters at different locations, and

[0045] The wastewater classification and collection unit includes collection mechanism A, collection mechanism B, wastewater tank A, wastewater tank, and collection mechanism C for separately collecting mud wastewater, cleaning wastewater, domestic wastewater, chemical wastewater, and mixed surface wastewater generated in the construction area. The function of the classification and collection unit is to collect wastewater according to its properties (suspended solids, oil, pH, toxicity) to avoid cross-contamination. See also Figure 2 As shown, different types of wastewater are collected using targeted devices, and then, based on the characteristics of the collected wastewater, they are sent to the pretreatment unit for differentiated pretreatment.

[0046] The pretreatment unit includes a bar screen filter for mixing and filtering wastewater from collection unit A, collection unit B, and wastewater tank A; an air flotation oil removal device for mixing and separating oil from wastewater from the wastewater tank and collection unit C; and a neutralization reaction tank for temporarily storing the mixed wastewater discharged after treatment by the bar screen filter and air flotation oil removal device. The pretreatment unit's function is to perform preliminary treatment based on the characteristics of different wastewaters, reducing the load on the core unit. At the same time, it enables the subsequent core treatment unit to be more targeted to different wastewaters or harmful substances contained in the wastewater, avoiding the generation of new pollutants or new obstacles to wastewater treatment during the treatment process.

[0047] The core treatment unit comprises a high-efficiency flocculation sedimentation tank, a biochemical reaction tank, and an electrochemical oxidation tank connected in sequence. The neutralization reaction tank is connected to the high-efficiency flocculation sedimentation tank. The purpose of the core treatment unit is to remove pollutants such as suspended solids, organic matter, and heavy metals. The core treatment unit features a revolutionary innovation in wastewater flocculation within the high-efficiency flocculation sedimentation tank. By adaptively adding a self-developed flocculant, it is optimized for the high viscosity characteristics of sludge wastewater compared to existing flocculants, increasing the settling velocity by 30%. Furthermore, porous packing material is filled into the A / O tank to enhance microbial adhesion and improve treatment efficiency.

[0048] The deep treatment unit includes an ultrafiltration reverse osmosis membrane tank, an activated carbon adsorption tower, and an ultraviolet disinfection tank connected in sequence, and the electrochemical oxidation tank is connected to the ultrafiltration reverse osmosis membrane tank.

[0049] The reuse and discharge unit includes an intelligent diversion mechanism and a clean water reuse tank connected to the electrochemical oxidation tank.

[0050] Example 2:

[0051] This embodiment further optimizes the structure of the classification and collection unit based on Embodiment 1. The collection mechanism A includes a slurry flocculation device for collecting and temporarily storing formation return mud and a solid-liquid separation device for pressure filtration of the return mud. The collection mechanism B includes a collection tank arranged around the equipment cleaning discharge port and set in a sunken manner to collect cleaning wastewater. The collection tank has a lowest position with a connecting guide pipe. The outlet end of the guide pipe is connected to a rotating screen for dynamic filtration. The rotating screen includes an inclined and rotating screen with radially arranged spiral baffles inside. The diameter of the screen gradually decreases from top to bottom.

[0052] In this embodiment, the bar screen filter includes a tank for storing mixed wastewater. An inlet is located at the top center of the tank, and outlets are located on both sides of the tank. At least one filter screen is vertically installed inside the tank near any outlet. It is worth noting that although the structure of the bar screen filter provided in this embodiment is relatively simple, it represents a departure from the outdated concepts of existing technologies. See also... Figure 3 As shown, when the mixed wastewater enters the tank from the top inlet, the denser solids naturally settle to the bottom of the tank, and these solid impurities do not create resistance to the filter screen; the mixed wastewater flows out slowly from both sides. Due to the flow of the crossbeams, the water flow inside the tank is very slow, which further reduces the obstruction pressure on the filter screen and extends the cleaning cycle of the filter screen. Compared with existing filtration devices, the bar filter device provided in this embodiment completes the natural sedimentation of solids before filtration, achieving adaptive density solid-liquid separation, and then filters impurities suspended and floating in the wastewater.

[0053] Example 3:

[0054] This embodiment further controls the dynamic neutralization reaction based on any of the above embodiments, aiming to improve the neutralization efficiency of wastewater and reduce reagent waste. In this embodiment, a pH sensor electrically connected to the intelligent monitoring unit is installed in the neutralization reaction tank. The intelligent monitoring unit is also communicatively connected to a dosing mechanism for adding pH adjusting reagent to the neutralization reaction tank. The intelligent monitoring unit adjusts the pH value according to the real-time pH value collected by the pH sensor. actual pH value of the system presetset The difference between the values ​​sends a drug delivery signal to the dosing mechanism, and the actual drug delivery amount u(t) of the dosing mechanism is realized through the following dynamic control algorithm.

[0055]

[0056] Where e(t) = pH set -pH actual (t) represents the real-time pH difference; K p K i K d These represent the proportional, integral, and derivative coefficients of the PID control, respectively; α represents the feedforward compensation coefficient, which is determined based on the wastewater flow rate Q and the pollutant concentration C. waste Calculation; Q represents the instantaneous flow rate of wastewater, which is obtained in real time through a flow meter; C waste This represents the initial acid-base equivalent concentration of the wastewater, obtained through experimental calibration or online detection.

[0057] In this embodiment, the intelligent monitoring unit further includes a dynamic calibration module. This module stores a program that dynamically adjusts the proportional, integral, and derivative coefficients of the PID control based on real-time pH difference and rate of change. Specifically, this includes the proportional coefficient K. p

[0058] K p =K p0 ·(1+β·|e(t)|

[0059] Among them, K p0 K represents the basic proportionality coefficient, ranging from 0.5 to 2.0; β represents the sensitivity factor, the larger the deviation, the higher the sensitivity factor. p The faster the increase, the faster the response;

[0060] Integral coefficient K i

[0061]

[0062] Among them, K i0 This represents the basic integral coefficient, with a value ranging from 0.5 to 2.0.

[0063] Differential coefficient K d

[0064]

[0065] Among them, K d0 γ represents the fundamental differential coefficient, with a value ranging from 0.1 to 0.5; γ represents the damping factor, which suppresses drastic fluctuations caused by sudden changes.

[0066] In this embodiment, the intelligent monitoring unit further includes a feedforward compensation optimization module for optimizing the feedforward compensation coefficient α. The feedforward compensation optimization module stores an executable program for determining the feedforward compensation coefficient α. Specifically...

[0067]

[0068] Among them, C target Represents the target neutralization equivalent; C chemical The concentration of the active ingredient in the drug; η represents the reaction efficiency of the drug under actual conditions.

[0069] The optimized system described above achieves a pH control accuracy of ±0.3 through dynamic control of reagent dosing, superior to traditional PID (±0.5-1.0). This avoids problems such as reagent waste due to overdosing or reduced treatment effectiveness or extended treatment time due to insufficient neutralization. Through feedforward compensation and dynamic PID, reagent waste is reduced by 20%-40%. More importantly, as a key technical improvement of this invention, the optimized feedforward compensation coefficient α module enhances the system's anti-interference capability. For example, when a sudden increase in surface runoff due to heavy rain causes a change in flow rate, the response time is shortened by 50%, improving system stability. Furthermore, when the system receives large amounts of wastewater from concrete curing or slurry equipment washing, the pH value may increase sharply. The entire system, combined with existing PLC or DCS systems, enables unattended operation, reducing human error. It is worth noting that the control systems involving PLCs or DCSs are existing technologies and are not part of the technical improvements of this invention; therefore, they will not be elaborated upon here.

[0070] Example 4:

[0071] To improve the flocculation effect of mixed wastewater, reduce the amount of flocculant added, and minimize flocculant residue and waste, this embodiment, based on any of the above embodiments, includes a flocculant dispensing mechanism controlled by the intelligent monitoring unit on the high-efficiency flocculation sedimentation tank. The flocculant dispensed by the flocculant dispensing mechanism consists of, by weight percentage: 50%-60% polyaluminum chloride, 20%-30% polyferric sulfate, 5%-8% anionic polyacrylamide, 3%-5% amphoteric polyacrylamide, 1%-2% modified nano-silica, 0.5%-1% graphene oxide, 0.5%-1% sodium citrate, and 1%-2% polydimethyldiallylammonium chloride.

[0072] The preparation method of the above-mentioned flocculant is briefly described as follows:

[0073] Premixed inorganic phase: PAC and PFS are dry-mixed in proportion to avoid hydrolysis and precipitation caused by direct mixing of solutions.

[0074] Nanomaterial dispersion: Modified nano-SiO2 and GO were ultrasonically dispersed in deionized water (30 min, 40 kHz), and sodium citrate was added for stabilization.

[0075] Organic phase dissolution: Prepare 0.1% dilute solutions of APAM and AmPAM separately, and stir slowly to avoid breaking the molecular chains.

[0076] Composite blending: Inorganic phase, nano-dispersion and organic phase are mixed in sequence, and finally PDADMAC is added and stirred and matured for 2 hours.

[0077] The technical advantages of this embodiment compared to the prior art are as follows:

[0078] Synergistic effect of nanomaterials: Nano-SiO2 and GO form a "skeleton structure" inside the flocs through physical adsorption and chemical bonding (such as Al-O-Si, Fe-OC), making the flocs denser and increasing the settling velocity by 30% to 40%. The lamellar structure of GO disrupts the network viscosity structure of the mud, significantly reducing the apparent viscosity (measured viscosity reduction rate ≥25%). Compatibility of zwitterionic polymers: AmPAM maintains efficient bridging effect under pH fluctuations or high salinity environments, while traditional APAM is prone to failure at pH <6. Shear stability: The cationic properties of PDADMAC protect the flocs from breakage during pumping or stirring. The technical indicators of the agent provided in this embodiment compared with existing flocculants are shown in Table 1 below:

[0079] index Traditional PAC+APAM This compound formula Increase Settlement velocity (m / h) 1.2 1.8 +50％ Turbidity of supernatant (NTU) 50～80 ≤15 Reduced by 70% Sludge moisture content (%) 85～90 78～82 Decrease of 8% to 10% Chemical cost (RMB / ton of water) 3.5 4.2 +20％*

[0080] Table 1 Comparison of indicators between the present invention and existing flocculants

[0081] The formulation provided in this embodiment overcomes the challenge of treating high-viscosity mud wastewater through a three-level synergistic approach of inorganic-organic-nano technology, and features rapid sedimentation, sludge reduction, and broad-spectrum adaptability.

[0082] Example 5:

[0083] To further improve the biochemical treatment effect, this embodiment, based on any of the above embodiments, includes multiple Φ25×50mm composite porous conductive biological packing materials suspended in the biochemical reaction tank via stainless steel mesh cages. The biological packing material includes a skeleton layer made of high-density polyethylene three-dimensional mesh, a porous matrix layer composed of polyurethane foam and activated carbon powder wrapped around the skeleton layer, a bioaffinity layer composed of polyvinyl alcohol gel outside the porous matrix layer, and a conductive functional layer disposed outside the bioaffinity layer to promote electron transfer and accelerate denitrification and anaerobic ammonia oxidation. The conductive functional layer is formed by spraying carbon nanotubes and graphene dispersion at a 1:1 ratio and thermally reducing it at 80°C for 2 hours.

[0084] The structure of the composite porous conductive bio-filler provided in this embodiment is shown in Table 2 below.

[0085]

[0086] Table 2 shows the structural and functional table of the composite porous conductive biological packing material. The performance parameters of the composite porous conductive biological packing material provided in this embodiment are shown in Table 3 below.

[0087]

[0088] Table 3 Performance parameters of composite porous conductive biological packing material

[0089] This embodiment provides a composite porous conductive biological packing material with the following technical advantages: the conductive coating and Anammox work synergistically reduce carbon source dosage by 30%, enabling more efficient nitrogen removal; the porous structure buffers water quality fluctuations (maintaining stable operation even when COD ≤ 500 mg / L); furthermore, the DIET mechanism reduces aeration requirements, making the system more energy-efficient. Finally, the addition of an integrated biofilm thickness sensor allows for further linkage with the control system to adjust the aeration rate, achieving significantly better results than existing technologies.

[0090] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An integrated infrastructure wastewater treatment system, characterized in that: This includes an intelligent monitoring unit for controlling wastewater flow in the system and collecting wastewater parameters at different locations, as well as... The classification and collection unit includes collection mechanism A, collection mechanism B, sewage tank A, sewage tank, and collection mechanism C for separately collecting mud wastewater, cleaning wastewater, domestic wastewater, chemical wastewater, and surface mixed wastewater generated in the infrastructure construction area; The pretreatment unit includes a bar screen filter for mixing and filtering wastewater from collection mechanism A, collection mechanism B and wastewater tank A, an air flotation oil removal device for mixing and separating oil from wastewater from the wastewater tank and collection mechanism C, and a neutralization reaction tank for temporarily storing the mixed wastewater discharged after treatment by the bar screen filter and air flotation oil removal device. The core processing unit includes a high-efficiency flocculation sedimentation tank, a biochemical reaction tank, and an electrochemical oxidation tank connected in sequence, with the neutralization reaction tank connected to the high-efficiency flocculation sedimentation tank. The deep treatment unit includes an ultrafiltration reverse osmosis membrane tank, an activated carbon adsorption tower, and an ultraviolet disinfection tank connected in sequence, and the electrochemical oxidation tank is connected to the ultrafiltration reverse osmosis membrane tank. The wastewater recycling unit includes an intelligent diversion mechanism and a clean water recycling tank connected to the electrochemical oxidation tank; The neutralization reaction tank is equipped with a pH sensor electrically connected to the intelligent monitoring unit. The intelligent monitoring unit is also communicatively connected to a dosing mechanism for adding pH-adjusting agents to the neutralization reaction tank. The intelligent monitoring unit adjusts the pH value based on the real-time pH value collected by the pH sensor. With system preset pH value The difference between the two signals sends a drug delivery signal to the dosing unit, indicating the actual drug delivery amount by the dosing unit. This is achieved through the following dynamic control algorithm. ;in, = This represents the real-time pH difference; , , These represent the proportional, integral, and derivative coefficients of PID control, respectively. Represents the feedforward compensation coefficient, based on wastewater flow rate. and pollutant concentration calculate; This represents the instantaneous flow rate of wastewater, which is obtained in real time through a flow meter. This represents the initial acid-base equivalent concentration of the wastewater, obtained through experimental calibration or online detection.

2. The integrated infrastructure wastewater treatment system according to claim 1, characterized in that: The collection mechanism A includes a slurry flocculation device for collecting and temporarily storing formation return mud and a solid-liquid separation device for pressure filtration of the return mud; the collection mechanism B includes a collection tank arranged around the equipment cleaning discharge port and set in a sunken manner to collect cleaning wastewater. The collection tank has a lowest position with a connecting guide pipe. The outlet end of the guide pipe is connected to a rotating screen for dynamic filtration. The rotating screen includes an inclined and rotating screen with radially arranged spiral baffles inside. The diameter of the screen gradually decreases from top to bottom.

3. The integrated infrastructure wastewater treatment system according to claim 1, characterized in that: The bar screen filter includes a tank for storing mixed wastewater, with an inlet at the top center of the tank and outlets on both sides of the tank. At least one filter screen is vertically installed inside the tank near any outlet.

4. The integrated infrastructure wastewater treatment system according to claim 1, characterized in that: The intelligent monitoring unit also includes a dynamic calibration module, which stores a program that dynamically adjusts the proportional, integral, and derivative coefficients of the PID control based on real-time pH difference and rate of change. Specifically, this includes the proportional coefficient... , ,in, This represents the basic proportionality coefficient, with a value ranging from 0.5 to 2.

0. This represents the sensitivity factor; the larger the deviation, the lower the sensitivity factor. The faster the increase, the faster the response; integral coefficient , ;in, Represents the fundamental integral coefficient, ranging from 0.5 to 2.0; differential coefficients. , ;in, Represents the fundamental differential coefficient, with values ​​ranging from 0.1 to 0.5; This represents the damping factor, which suppresses drastic fluctuations caused by mutations.

5. The integrated infrastructure wastewater treatment system according to claim 1, characterized in that: The intelligent monitoring unit also includes a function for optimizing the feedforward compensation coefficient. The feedforward compensation optimization module stores executable feedforward compensation coefficients. The specific procedure for determining this. ;in, Represents the target neutralization equivalent; Concentration of the active ingredient in the drug; It represents the reaction efficiency of the agent in a real environment.

6. The integrated infrastructure wastewater treatment system according to claim 1, characterized in that: The high-efficiency flocculation sedimentation tank is equipped with a flocculant dispensing mechanism controlled by the intelligent monitoring unit. The flocculant dispensed by the flocculant dispensing mechanism consists of 50%-60% polyaluminum chloride, 20%-30% polyferric sulfate, 5%-8% anionic polyacrylamide, 3%-5% amphoteric polyacrylamide, 1%-2% modified nano silica, 0.5%-1% graphene oxide, 0.5%-1% sodium citrate, and 1%-2% polydimethyldiallylammonium chloride, by weight percentage.

7. The integrated infrastructure wastewater treatment system according to claim 1, characterized in that: The biochemical reaction tank is equipped with multiple Φ25×50mm composite porous conductive biological packing materials suspended by stainless steel mesh cages. The biological packing materials include a skeleton layer made of high-density polyethylene three-dimensional mesh, a porous matrix layer composed of polyurethane foam and activated carbon powder wrapped around the skeleton layer, a bioaffinity layer composed of polyvinyl alcohol gel outside the porous matrix layer, and a conductive functional layer placed outside the bioaffinity layer to promote electron transfer and accelerate denitrification and anaerobic ammonia oxidation. The conductive functional layer is formed by spraying carbon nanotubes and graphene dispersion in a 1:1 ratio and thermally reducing it at 80°C for 2 hours.

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