CN-121990679-A - Constructed wetland pollution and carbon reduction synergistic effect analysis system and method

CN121990679ACN 121990679 ACN121990679 ACN 121990679ACN-121990679-A

Abstract

The invention discloses a constructed wetland pollution and carbon reduction synergistic effect analysis system and a constructed wetland pollution and carbon reduction synergistic effect analysis method, and relates to the technical field of water pollution control and greenhouse gas emission reduction. The system comprises a simulated wetland reaction unit, a multi-parameter monitoring module, an operation regulation and control module, a microorganism analysis module and a synergistic effect evaluation module. The simulation wetland reaction unit is filled with FeC composite matrixes to realize subsurface flow constructed wetland environment simulation, the multi-parameter monitoring module is used for acquiring water quality and greenhouse gas emission data in real time, the operation regulation and control module is used for realizing accurate regulation and control of water inlet parameters, the microbial analysis module is used for analyzing microbial community and functional gene information, the synergistic effect evaluation module is used for integrating multi-module data to construct a correlation model, calculating a synergistic effect index and outputting optimized parameters. The evaluation and optimization of the pollution and carbon reduction synergistic effect of the constructed wetland is realized through five stages of matrix optimization, operation regulation and control, microorganism mechanism disclosure, cooperative evaluation optimization and feedback application, and a scientific basis is provided for the engineering design and operation of the actual constructed wetland.

Inventors

ZHANG YAN
LI XINHUA
LIU HONGYUAN
DONG HONGYUN
LU HAN
QI GAOXIANG

Assignees

山东省农业科学院

Dates

Publication Date: 20260508
Application Date: 20260122

Claims (10)

1. The utility model provides a constructed wetland falls dirty carbon reduction synergistic effect analytic system which characterized in that: Comprising the following steps: the simulated wetland reaction unit is used for simulating the subsurface flow constructed wetland environment, and FeC composite matrixes are filled in the simulated wetland reaction unit, and the FeC composite matrixes are formed by mixing iron-based materials, biomass charcoal and natural matrixes such as zeolite or sand stone according to a preset volume ratio; The multi-parameter monitoring module is connected with the simulated wetland reaction unit and is used for monitoring the water quality parameters of the inlet water, the water quality parameters of the outlet water and the discharge flux of CH 4 and N 2 O gas generated in the simulated wetland reaction unit in real time; The operation regulation and control module is connected with the water inlet end of the simulated wetland reaction unit and used for regulating and controlling the pollution load, the hydraulic retention time, the aeration condition and the water inlet carbon nitrogen ratio of the inlet water according to a preset strategy or a feedback signal; The microbial analysis module is used for carrying out DNA extraction, high-throughput sequencing and bioinformatics analysis on samples collected from the FeC composite matrix to obtain the microbial community structure, the diversity and the predicted abundance information of the functional genes related to the greenhouse gas emission; The input end of the synergistic effect evaluation module is connected with the multi-parameter monitoring module and the microorganism analysis module, and the output end of the synergistic effect evaluation module is connected with the operation regulation and control module, wherein the synergistic effect evaluation module is used for: a. calculating pollutant removal efficiency based on the water quality parameter; b. Calculating a global warming potential based on the gas discharge flux; c. Constructing a pollution-reducing and carbon-reducing synergistic effect correlation model by combining pollutant removal efficiency, global warming potential and microorganism functional gene information; d. based on the correlation model, calculating a synergistic effect index, generating an optimized operation parameter suggestion, and feeding back to an operation regulation and control module.
2. The constructed wetland pollution and carbon reduction synergistic effect analysis system and method according to claim 1 are characterized in that: In the FeC composite matrix, the mixture of the iron-based material and the biomass charcoal accounts for 10% -40% of the total volume, the natural matrix such as zeolite or sand stone accounts for 60% -90% of the total volume, and the mass ratio of the iron-based material to the biomass charcoal is 1:1-5:1; the iron-based material is one or more of scrap iron, pyrite or zero-valent iron; The biomass charcoal is one of bamboo charcoal, straw charcoal or wood dust charcoal.
3. The constructed wetland pollution and carbon reduction synergistic effect analysis system and method according to claim 1 are characterized in that: the multi-parameter monitoring module comprises an online water quality sensor and a greenhouse gas static box-chromatograph combined acquisition and analysis device.
4. The constructed wetland pollution and carbon reduction synergistic effect analysis system and method according to claim 1 are characterized in that: the operation regulation and control module comprises a proportional pump, a flow controller, an aeration pump and a carbon source/nitrogen source adding device.
5. The constructed wetland pollution and carbon reduction synergistic effect analysis system and method according to claim 1 are characterized in that: The association model constructed by the synergistic effect evaluation module is a multiple regression model, a machine learning model or a structural equation model, and the Synergistic Effect Index (SEI) is calculated by one of the following formulas or variants thereof: Sei= (pollutant removal integrated index)/(greenhouse gas emission integrated index); The comprehensive index of greenhouse gas emission in the formula is the normalized GWP value; or SEI = α x normalized removal- β x normalized GWP; In the formula, alpha and beta are weight coefficients.
6. An artificial wetland pollution and carbon reduction synergistic effect analysis method adopting the system as defined in any one of claims 1 to 5, which is characterized in that: The method comprises the following steps: s1, constructing and initializing a simulated wetland reaction unit with different FeC composite matrix proportions, and planting wetland plants; s2, analyzing and optimizing the matrix in the first stage, namely operating each simulated wetland reaction unit under standard operation conditions, acquiring pollutant removal rate and greenhouse gas emission data through a multi-parameter monitoring module, and comparing and determining the optimal ratio of FeC; S3, analyzing and controlling operation in a second stage, namely under the optimal proportioning, changing the water inlet load, the hydraulic retention time, the aeration intensity and the carbon nitrogen ratio through an operation control module system, monitoring response curves of decontamination and gas production under different operation scenes, and identifying an optimal operation parameter interval; S4, analyzing a third stage of analysis-microorganism mechanism reveal that a typical scene is selected in an optimal operation parameter interval, analyzing the abundance changes of a microorganism community structure, a key flora and functional genes related to CH 4 、N 2 O production/consumption under the corresponding scene through a microorganism analysis module, and establishing a causal chain of operation parameters, microorganism characteristics and environmental efficiency; s5, utilizing a synergistic effect evaluation module to integrate all data of the S2 to the S4, constructing a synergistic effect association model, calculating a synergistic effect index of each scene, and outputting a comprehensive evaluation report and a system optimization operation scheme; and S6, the feedback application, namely applying the optimal FeC ratio and the optimal operation scheme obtained in the step 5 to design, construction or operation transformation of the subsurface constructed wetland engineering for the actual scale livestock and poultry cultivation sewage treatment, and continuously monitoring and dynamically optimizing the engineering operation effect.
7. The method for analyzing the synergistic effect of pollution and carbon reduction of the constructed wetland according to claim 6 is characterized in that: in the step S1, one or more of reed, typha, flos lonicerae or calamus are selected as wetland plants, and the planting density is 20-30 plants/m 2 ; the effective volume of the simulated wetland reaction unit is 50-100L, and the hydraulic gradient is 1% -3%.
8. The method for analyzing the synergistic effect of pollution and carbon reduction of the constructed wetland according to claim 6 is characterized in that: In the step S2, the standard operation condition is to simulate the average water quality of the livestock and poultry raising sewage, the average water quality is COD 300-800mg/L, NH 4 + -N50-150 mg/L, TP 5-20mg/L, the hydraulic retention time is 3-7 days, and the anaerobic or anoxic state is adopted.
9. The method for analyzing the synergistic effect of pollution and carbon reduction of the constructed wetland according to claim 6 is characterized in that: In the step S3, the water inflow load regulation and control range is 0.5-2.0kg COD/(m 3 .d), the hydraulic retention time regulation and control range is 2-10 days, the aeration intensity regulation and control range is 0.1-0.5m 3 /(m 2 .h), and the carbon nitrogen ratio regulation and control range is 3:1-15:1.
10. The method for analyzing the synergistic effect of pollution and carbon reduction of the constructed wetland according to claim 6 is characterized in that: In the step S4, the key flora comprises methanogenic archaea, methane-oxidizing bacteria, ammonia-oxidizing bacteria, denitrifying bacteria and iron-reducing bacteria; And in the step S5, when the association model is constructed, the predicted abundance of the functional genes of the microorganisms is taken as an explanatory variable, the pollutant removal rate and the greenhouse gas emission flux are taken as response variables, and the multivariate statistical analysis is carried out.

Description

Constructed wetland pollution and carbon reduction synergistic effect analysis system and method Technical Field The invention relates to the technical field of water pollution control and greenhouse gas emission reduction, in particular to a constructed wetland pollution and carbon reduction synergistic effect analysis system and method. Background The constructed wetland is used as a low-cost and ecological-friendly sewage treatment technology and is widely applied to the treatment of low-concentration to medium-concentration sewage such as livestock and poultry cultivation sewage, domestic sewage and the like. The method realizes the removal of pollutants through the synergistic effects of matrix interception, plant absorption, microorganism metabolism and the like, but strong greenhouse gases such as CH 4、N2 O and the like are easy to generate in the operation process, so that the greenhouse effect is caused, and the full play of the 'ecological friendly' advantage is restricted. Therefore, the cooperative optimization of the pollution reduction and the carbon reduction of the constructed wetland is realized, and the method becomes a research hot spot and a technical difficulty in the current field. In the prior art, researches on the constructed wetland are focused on improving the single pollutant removal efficiency or independently carrying out monitoring on the emission characteristics of greenhouse gases, and system analysis on the synergistic effect of the two is lacking. Meanwhile, the operation effect of the constructed wetland is comprehensively influenced by matrix proportion, operation parameters (such as water inflow load, hydraulic retention time and the like) and microbial community structures, the quantitative association between matrix-operation parameters-microorganism-synergistic efficiency is difficult to establish in the prior art, so that an optimal operation scheme cannot be accurately screened, and the design and operation transformation of actual engineering are difficult to effectively guide. The FeC composite matrix formed by compositing the Fe-based material and the biomass charcoal has good adsorption performance, electron transfer capability and microorganism carrier function, so that the pollutant removal is enhanced, the microorganism metabolic process is hopefully regulated, and the emission of greenhouse gases is reduced. However, the influence rules of different FeC ratios and operation parameters on the pollution and carbon reduction synergistic effect are not clear, and the lack of a corresponding system analysis method and an evaluation system limits the efficient application of the FeC composite matrix in the constructed wetland. Based on this, there is a need to develop a system and a method capable of systematically analyzing the synergistic effect of pollution and carbon reduction of the constructed wetland, by integrating water quality monitoring, greenhouse gas monitoring, microorganism analysis and collaborative evaluation, quantitative association between multifactor and collaborative efficiency is established, and optimal matrix proportion and operation parameters are screened, so that scientific basis is provided for the optimization design and operation regulation of the actual constructed wetland engineering. Disclosure of Invention Aiming at the problems of lack of cooperative analysis of pollution reduction and carbon reduction of the constructed wetland, undefined multi-factor association, insufficient pertinence of an optimization scheme and the like in the prior art, the invention provides a cooperative effect analysis system and method for pollution reduction and carbon reduction of the constructed wetland, which realize system monitoring, quantitative evaluation and accurate optimization of cooperative effect of pollution reduction and carbon reduction of the constructed wetland and fill the blank of the prior art. The technical scheme adopted for solving the technical problems is as follows: The invention provides an artificial wetland pollution and carbon reduction synergistic effect analysis system, which comprises the following steps: the simulated wetland reaction unit is used for simulating the subsurface flow constructed wetland environment, and FeC composite matrixes are filled in the simulated wetland reaction unit, and the FeC composite matrixes are formed by mixing iron-based materials, biomass charcoal and natural matrixes such as zeolite or sand stone according to a preset volume ratio; The multi-parameter monitoring module is connected with the simulated wetland reaction unit and is used for monitoring the water quality parameters of the inlet water, the water quality parameters of the outlet water and the discharge flux of CH 4 and N 2 O gas generated in the simulated wetland reaction unit in real time; The operation regulation and control module is connected with the water inlet end of the simulated wetland reaction unit and used fo