50 results about "Dissolved organic carbon" patented technology

The invention discloses a river organic carbon flux inversion method based on multi-source data and related equipment. The method comprises the following steps: acquiring multi-source data of a river basin range in a target research area; obtaining a normalized difference index based on remote sensing image conversion; river parameters of the target research area are obtained based on the normalized difference water body indexes and multi-source data processing, and river runoff is obtained through conversion of a hydraulic geometrical relationship; on the basis of the remote sensing image, the normalized difference chlorophyll index and the normalized difference turbidity index, the particle organic carbon concentration is obtained through inversion by means of a first inversion model; based on the population number and the rainfall capacity, a second inversion model is used for inversion to obtain the concentration of dissolved organic carbon; and converting the river runoff, the particle organic carbon concentration and the dissolved organic carbon concentration to obtain the river organic carbon flux. The method can significantly improve the accuracy and reliability of monitoring on a high-dynamic river, accurately realizes the inversion of the organic carbon flux of the river, and can be widely applied to the technical field of data processing.

The invention discloses a method for promoting bacillus soil microorganisms to actively absorb oxygen to degrade long-chain alkanes, which comprises the following steps: preparing a catalyst: uniformly mixing oil-containing soil, a carbon source, citric acid, ferric salt, hydrogen peroxide and distilled water, filtering, concentrating clear liquid to obtain a concentrated crystal substance, centrifugally cleaning the crystal substance, and drying to obtain the catalyst; the method comprises the following steps: mixing a catalyst with oil-containing soil, hydrogen peroxide and distilled water, and oscillating on a shaking table for Fenton pre-oxidation; after pre-oxidation, intermittent oscillation oxygenation is carried out, bioremediation is carried out on the petroleum-contaminated soil at normal temperature, and the three petroleum bacteria in the soil are activated. Through pre-oxidation treatment, consumption of soluble organic carbon by microorganisms in soil is stimulated, the active oxygen uptake process of the microorganisms is accelerated, and the carbon metabolism process is accelerated. Finally, the bacillus-like microorganisms capable of degrading the petroleum are activated, so that the aim of degrading the petroleum hydrocarbon in the soil for a long time is fulfilled.

The invention provides a method for reducing CH4 emission of a constructed wetland, the constructed wetland and a construction method of the constructed wetland, and particularly relates to the technical field of environmental protection. The method for reducing the CH4 emission of the constructed wetland comprises the following steps: doping biochar-loaded nano zero-valent iron into an upper-layer matrix of the constructed wetland; the doping amount of the charcoal-loaded nano zero-valent iron is 0.5-2% of the mass of the upper-layer substrate. According to the method, the concentration of soluble organic carbon (DOC) in the constructed wetland is improved by controlling the content of the biochar-loaded nano zero-valent iron, so that the diversity of CH4 oxidizing bacteria and the relative abundance of Guangmethylotrophicus are improved, the CH4 oxidation reaction is promoted, and finally the emission reduction of CH4 is realized. According to the data of the embodiment, the average discharge flux of CH4 of the constructed wetland prepared by the invention is 0.22-0.35 mg.C / m < 2 > / h, and is reduced by 35.6-59.8% compared with the contrast.

The invention discloses a water body pollution tracing method. The method comprises the following steps: collecting water samples of a plurality of water bodies in a target area and a plurality of pollution source samples around the water bodies; carrying out pretreatment on the water sample and the pollution source sample; adjusting the volumes of the water sample and the pollution source sample to enable the dissolved organic carbon content of each sample to be consistent, extracting organic matters in each sample, and preparing a to-be-detected solution; collecting high-resolution mass spectrum data of the to-be-detected liquid and performing pretreatment; carrying out peak extraction and peak alignment on the high-resolution mass spectrum data, then calculating the similarity between the water body sample and each pollution source sample, and quantitatively calculating the contribution rate of each pollution source to the water body; judging primary and secondary pollution sources of the water body; and identifying the characteristic mass spectrum peaks of the pollution sources, and determining the positions of the main pollution sources according to the spatial distribution rule of the characteristic mass spectrum peaks in the water environment of the target area. According to the method, the pollution characteristics of the target area are comprehensively reflected by using the overall organic matter mass spectrum information, so that the water pollution traceability is more accurate.

The invention discloses a preparation method of modified salicornia biochar, and belongs to the technical field of environmental protection. The preparation method comprises the following steps: washing, drying and crushing salicornia europaea serving as a raw material, mixing the salicornia europaea with a nitrogen source modifier according to a certain mass ratio, adding water, uniformly stirring, dipping and drying; the nitrogen source modifier is one or more of urea, melamine or thiourea; then carrying out pyrolysis and carbonization, grinding, washing and drying the obtained carbon material, and finally preparing the modified salicornia biochar. The prepared modified salicornia biochar is used for adsorbing organic matters in sewage or wastewater, can effectively remove dissolved organic carbon (DOC, 86.34%), UV254 (89.33%) and chromaticity (CN, 94.74%) in an adsorption experiment of livestock and poultry biogas slurry, and shows excellent adsorption performance. The method follows the principle of treating waste with waste, the salicornia europaea waste is effectively treated, the obtained biochar has good application potential in the aspect of sewage and wastewater treatment, and high-value utilization of the waste is achieved.

Provided are an aerobic denitrification actinomycete strain and a use thereof. The strain is named Streptomyces venezuelae D18, and the aerobic denitrification actinomycete strain can be used for water body remediation. The aerobic denitrification actinomycete strain has a dissolved organic carbon removal rate of 93.34%, a nitrate removal rate of 99.79%, and a total nitrogen removal rate of 98.44%, and the strain has good denitrification performance, and provides a new insight for developing diversified efficient aerobic denitrification biological resources. When the strain is used for water body remediation, the total nitrogen removal rate can reach 89.16%, and the permanganate removal rate can reach 91.44%. The strain can efficiently realize remediation of lightly polluted water bodies.

The invention provides a method for establishing a soil organic carbon decomposition model based on a microbial process, which comprises the following steps: collecting soil and model parameters, and defining a model dry and wet region carbon library and microbial physiological state activity conditions; calculating the conversion speed of the carbon library between the dry and wet areas caused by the change of the water content in the soil; calculating the speed of forming DOC by enzyme catalytic decomposition of POC in the dry and wet regions and the speed of absorbing DOC by active microorganisms in the wet regions; calculating the speed of extracellular enzyme production, growth, respiration and death of the microorganisms and the MAOC density of the wet region during balance; establishing a mass balance equation of an enzyme carbon library ENZ and soil particle organic carbon POC; establishing a mass balance equation of dissolved organic carbon (DOC) and mineral bound organic carbon (MAOC); and establishing a dry and wet region microbial biomass MBC carbon library mass balance equation. According to the invention, the simulation capability of the model on organic carbon decomposed by soil microorganisms, especially pulse type soil respiration change caused by dry-wet change, is improved.

The invention discloses a method for determining carbon isotopes of low-concentration soluble organic carbon in a water body, and belongs to the technical field of organic carbon detection. The determination method comprises the following steps: combining a TOC analyzer and a stable isotope mass spectrometer, and converting DOC in a water body into CO2 gas by adopting the TOC analyzer; cO2 gas generated by the TOC analyzer is enriched for the first time through the cold trap T1; the CO2 gas frozen by the cold trap T1 is enriched for the second time through a cold trap T2; introducing the CO2 subjected to secondary enrichment into a stable isotope mass spectrometer, and determining the carbon isotope composition of the CO2. Aiming at a low-concentration DOC water body, the carbon isotope composition of DOC in the water body is determined on the basis of combination of a wet oxidation technology and stable isotope mass spectrometry detection, a wet oxidation method is used for increasing the volume of a water sample to generate more CO2 for stable isotope mass spectrometry determination, so that more accurate carbon isotope composition is obtained, and the method is efficient, time-saving, labor-saving and accurate.

The application discloses a kind of unmanned aerial vehicle low disturbance water sample sampling device and method for coastal wetland, device includes unmanned aerial vehicle aircraft, sampling unit and recovery unit;Surface sampler is the container bottle of top opening, two sides are connected first float ball and metal ball respectively, after entering water, rely on buoyancy and gravity coupling to keep bottle mouth inclination posture, surface water is naturally flowed into with hydrostatic pressure difference mode;Bottom sampler is the container bottle of airtight, top is equipped with exhaust hole, bottom side is equipped with water inlet, water inlet is hinged with the sealing baffle of with counterweight and guide stress plate, when entering water, water pressure moment overcomes counterweight damping moment to make baffle open smoothly, water enters in laminar flow mode;When rising, counterweight gravity makes baffle automatic reset seal.The application realizes the low physical disturbance of sampling link, can collect surface and bottom water sample once, to obtain water sample for testing dissolved oxygen, solubility greenhouse gas concentration, dissolved organic carbon, particulate carbon, nutrient salt, dissolved organic matter molecular composition.

The invention discloses a preparation method of modified apocynum venetum charcoal. The preparation method comprises the following steps: flushing apocynum venetum, drying, crushing and sieving; adding water, uniformly mixing the apocynum venetum powder with a composite modifier, and drying, wherein the composite modifier comprises a urea, sodium carbonate and ferric salt ternary system; and then carrying out pyrolysis. The obtained modified apocynum venetum charcoal is applied to adsorption of organic matters in sewage or wastewater treatment. Adsorption experiments are carried out on livestock and poultry biogas slurry, after 48 hours, the removal rate of the modified apocynum venetum charcoal adsorbent on soluble organic carbon in biogas slurry wastewater is 57.42%, the removal rate of UV254 is 75.90%, the removal rate of chromaticity is 78.64%, and the modified apocynum venetum charcoal adsorbent shows excellent adsorption performance and can be used as a good adsorbent for removing organic pollutants in water treatment. According to the method, circular economy and the idea of treating waste with waste are taken as basic principles, so that the apocynum venetum waste is treated, and the obtained apocynum venetum biochar can effectively treat organic matters in wastewater and meet the treatment requirements of various types of wastewater.

There is described a system and method for measuring properties of water, such as surface water at site. That site may be in an agricultural setting. The properties of water, such as surface water may include nitrates and / or dissolved organic carbons. An example system may comprise a light source configured to emit a broadband source signal comprising a particular bandwidth for use in measuring a range of particular properties of water as well as an optical device configure to split the source signal into a measurement signal, and a corresponding reference signal. The system may also comprise a sensor unit configured to communicate a measurement signal through water at the sensor unit (e.g., when located in a stream), and a spectrometer configured to receive both a measurement signal having been communicated through water at the sensor unit and a reference signal from the optical device. Such a spectrometer may be configured to separate received measurement signals and reference signals into common component wavelengths, those common component wavelengths being associated with expected properties of water; and the system may be further configured to use respective component wavelengths of a measurement signal together with those of a reference signal to determine one or more particular properties of measured water.

The present invention discloses a method for reducing the risk of composite pollutants in sewage, belonging to the technical field of sewage treatment. The method comprises the following steps: S1 measuring the concentration of dissolved organic carbon and the total concentration of composite pollutants in the sewage; S2 measuring the proportion P of the dissolved organic matter molecules with a modified aromaticity index ≥ 0.5 in the sewage; S3 selecting a corresponding filling scheme for the dual-media adsorption column based on the ratio of the concentration of dissolved organic carbon to the total concentration of composite pollutants and P. The method provided by the present invention can in-situ upgrade the existing activated carbon adsorption process, effectively reduce the risk of composite pollutants in sewage, and effectively ensure the safety of the effluent from the sewage treatment plant.

The invention discloses a method for improving the property of dry farmland soil by using low-concentration hypochlorous acid, which comprises the following steps: after the soil is turned over to be fluffy, uniformly spraying persulfate solutions with different concentrations on the surface, and controlling the water-soil ratio to be 1: 2; the invention further discloses application of the method in the process of improving basic physicochemical properties of farmland soil. The pypocholoride with different concentrations is added into the dry land soil, so that the quality of the dry land soil is improved. By applying a low dosage of sodium hypochlorite oxidizing agent to the long-term cultivated dry land soil, the soil quality can be improved, for example, the content of soil dissolved organic carbon (DOC) and bio-available iron, manganese, zinc and the like is increased, the number of harmful fungi is reduced, the structure of a soil microbial community is improved, the recovery speed of the soil microbial community is increased, and the soil productivity is rapidly improved.

The application discloses a kind of closed-loop ecological marine system based on multi-species coupling and surface layer circulation, belong to closed-loop ecological marine technical field, it includes: biological coupling processing area, hydrodynamic circulation system;Biological coupling processing area.In the application, through the synergy of multi-nutrient level biological coupling and closed-loop hydrodynamic circulation, efficient self-cleaning and ecological stability to the breeding or simulated seawater body are realized, the flow generator near the water surface can accurately promote the breaking of water surface tension, increase the dissolved oxygen content and the overall ecological biochemical reaction speed and dissolved organic matter, then inorganic nitrogen and phosphorus are rapidly absorbed by feather algae, grape algae and the like, the salt plant root system provides a microbial degradation platform, the salt plant adjusts salinity and absorbs excess nutrients, coral and symbiotic algae form a stable microecological structure, the entire processing chain does not need any chemical agent addition, and the ammonia nitrogen, nitrate and phosphate concentration can be significantly reduced, and dissolved organic carbon is continuously and efficiently removed, which fundamentally avoids the high energy consumption and chemical secondary pollution problems of traditional mechanical filtration.

The invention provides comamonas and application thereof in removing soluble organic carbon, and relates to the technical field of sewage treatment. The Comamonas sp. WN2 strain disclosed by the invention is preserved in the Guangdong Microbial Culture Collection Center (GDMCC), and the preservation number is GDMCC NO. 64336. The Comamonas sp. WN2 strain disclosed by the invention has the advantages that the Comamonas sp. The comamonas strain WN2 provided by the invention has efficient organic carbon degradation capability, and can significantly reduce the total organic carbon and chemical oxygen demand level of a water body. The biological membrane generated on the basis of the comamonas strain WN2 is used for sewage treatment, so that the technical effects of improving the sewage treatment efficiency and effectively reducing the operation cost are achieved.

This invention relates to an electrochemical sensor for rapid, sensitive detection of manganese ions (Mn2+) in water. The sensor features a screen-printed carbon electrode (SPCE) substrate coated with an electrochemically deposited composite of molybdenum disulfide (MoS2), a transition metal dichalcogenide (TMD), and chitosan, a biopolymer. The deposition process utilizes optimized potentials (+0.7 to +1.1 V) and times (30 to 900 s), ensuring uniform, stable coatings. Sensor sensitivity is maximized using a 0.2 M acetate buffer solution (pH 4.5), significantly reducing interference from competing ions and dissolved organic carbon. Detection employs square wave adsorptive cathodic stripping voltammetry (SWAdCSV), reliably quantifying trace Mn2+ concentrations below regulatory limits. Minimal interference from common ions except ferrous iron (Fe2+) and simplified calibration procedures for various water sources enable on-site, real-time Mn2+ monitoring. The invention offers a cost-effective, practical solution for environmental and potable water testing.

The present invention provides a system and a method for generating water-based super vapor or gas by extracting dissolved organic carbon, DOC from liquid sources. The method involves introducing a liquid containing DOC into a cavitation chamber and applying a piezoelectric effect to induce micro-cavitation through ultrasonic waves. The method creates alternating high-pressure and low-pressure cycles that form and collapse micro-cavitation bubbles, releasing localized energy that breaks down DOC into smaller molecules and gases. Environmental air may be introduced to aid in bubble rupture and gas release. The present system comprises a piezoelectric transducer, wave generator, cavitation chamber, and control unit. The present invention provides an efficient, cost-effective solution for DOC extraction and conversion, enhancing waste management and resource recovery.

The invention provides a medium and small river water dissolved organic carbon into-sea flux remote sensing evaluation method and system.The method comprises the steps that firstly, a high-resolution remote sensing image of a target drainage basin and actual measurement data of permanganate index sampling points are obtained, and dissolved organic carbon concentration accurate actual measurement data corresponding to the permanganate index actual measurement data are calculated according to the linear regression relation; secondly, the remote sensing data of the sampling points are matched with the quasi-measured data of the dissolved organic carbon concentration, an XGBoost model is trained, and a dissolved organic carbon concentration prediction model is obtained; finally, acquiring a remote sensing image and sea inflow data of the target drainage basin on the same day, and determining a pixel corresponding to a sea inflow measurement section in the remote sensing image; utilizing the dissolved organic carbon concentration prediction model to obtain dissolved organic carbon concentration prediction data corresponding to pixels in the remote sensing image; and calculating the dissolved organic carbon into-sea flux of the target drainage basin according to the dissolved organic carbon concentration prediction data and the into-sea flow data, and calculating the dissolved organic carbon into-sea flux in combination with the into-sea flow data.

This invention relates to the field of wetland ecological environment monitoring and greenhouse gas emission reduction technology, specifically to a method for assessing the impact of microplastics on methane emissions from wetland soils based on soil carbon composition. This invention assesses the degree of change in methane emissions from wetland soils after the addition of microplastics by measuring changes in the content of organic carbon components in the soil. Results show that, without relying on the detection of functional genes such as methanogens and methanogens, changes in the content of only two key carbon components—dissolved organic carbon and mineral-bound organic carbon—can accurately and quickly assess the direction and intensity of the impact of microplastics on methane emissions from wetland soils. This demonstrates the feasibility, scientific validity, and practicality of the method, providing a simple, efficient, and easily scalable new approach for assessing methane emissions from greenhouse gases under microplastic pollution stress in ecosystems.

The invention belongs to the technical field of soil sample treatment equipment, and particularly relates to a soil sample inorganic carbon removal device which comprises an outer machine body and a control unit, the outer machine body is divided into an upper cavity and a lower cavity through an isolation layer, a pickling assembly is installed in the upper cavity, and a flushing assembly is installed in the lower cavity; the pickling assembly comprises a reaction unit and an adding unit, the reaction unit comprises a base platform, a clamping platform is installed on the base platform, a washing barrel is slidably clamped on the clamping platform, a cup opening corresponds to the washing barrel after the material cup rotates and topples over, a second air cylinder is installed in the base platform, a connecting rod is installed on a driving rod of the second air cylinder, and a transfer barrel is installed on the connecting rod; the upper end of the transfer cylinder is matched with the cover ring, the flushing assembly is used for adding UP water into the flushing cylinder, and the problems that the number of steps is large, time is long when a soil sample is treated at present, meanwhile, small soil particles and soluble organic carbon are likely to be eluted in the operation process through manual operation, and the subsequent detection result is affected are solved.

A known method for producing an algae lysis water concentration mixture for dosing into raw water to obtain test water for testing a water treatment plant, whereby an organic load of a natural body of water is simulated, comprises the following steps: a) Formation of an algae-water concentration mixture from Chlorella vulgaris algae contained in water, b) Lysis of Chlorella vulgaris algae using ultrasound. The following feature takes into account high reproducibility with simple manufacturing: c) The lysis of the Chlorella vulgaris algae is carried out for a lysis period until the value of dissolved organic carbon, hereinafter referred to as DOC (dissolved organic carbon) value, has reached its maximum. It should be added: The algae are Chlorella Vulgaris from sterile and fermentative cultivation of high cell density. Furthermore, the algae lysis water concentrate can also be used to produce the test water after deep freezing.

This invention relates to the fields of ecological science and soil carbon sequestration technology, specifically to a method for promoting soil carbon sequestration using calcium ions and biochar. The method comprises the following steps: pre-culturing soil under sealed, light-protected conditions for 6-10 days; adding biochar and a calcium source to the pre-cultured soil; mixing thoroughly; and then formally culturing under the same conditions as the pre-culture for 50-70 days. This invention introduces calcium ions into biochar. Calcium ions, through cation bridging and inorganic cementation, significantly promote the formation of large soil aggregates and substantially increase the saturated adsorption capacity and affinity of biochar for dissolved organic carbon, thereby effectively reducing the risk of mineralization loss of organic carbon in the soil. This method is simple to operate and low in cost, providing effective technical support for overcoming the bottleneck of soil carbon sequestration using biochar and improving the application benefits of biochar.

The invention provides a soil mineral binding state organic carbon calculation method based on an adsorption function. The method comprises the following steps: collecting soil parameters; modifying a Langmuir adsorption function, and describing a relationship between the concentration of dissolved organic carbon (DOC) in an unsaturated soil solution and the density of MAOC capable of generating an adsorption / desorption process; establishing a differential equation of the DOC concentration of the soil solution and the MAOC density of the soil in the adsorption / desorption process along with time; establishing a numerical difference equation of solution DOC in unit volume of soil and MAOC differential equations in the adsorption / desorption process; carrying out simultaneous solution on the differential equation set; and calculating the DOC concentration of the soil solution, the MAOC density of the soil in the adsorption / desorption process and the total MAOC density. The method can ensure the mass balance of the organic carbon in the calculation time step length, can be used for a soil organic carbon numerical model, and further improves the simulation capability of the model on the decomposition speed of the soil organic carbon and the size of a carbon library.

According to the technology for changing wastes into the nutrient source for growth of the algae and bacteria, the nutrient source outside the euphotic layer can be applied to the euphotic layer at low cost, so that wastes are changed into valuables; the wastes are naturally degraded by microorganisms to release a nutrient source containing carbon, nitrogen, phosphorus, sulfur, silicon and dissolved organic carbon to provide basic substances for photosynthesis of algae and growth of bacteria, so that photosynthesis of the algae by utilizing carbon dioxide is promoted, secondary production of the bacteria by utilizing the dissolved organic carbon is promoted, marine organisms in the whole food web can be increased, and the quality of the whole food web is improved. A new bait field for migratory fishes is formed, the productivity of the ocean is improved, more natural fishes are produced, natural circulation of carbon and nitrogen required by human beings can be fully met, the safety guarantee supply problem of human food sources is thoroughly solved, meanwhile, a large amount of carbon dioxide is sealed for a long time, and permanent natural circulation and economic circulation of resources are achieved.

The invention is applicable to the technical field of soil improvement, and provides a soil improvement effect analysis method and application, and the method comprises the following steps: after soil improvement is completed, collecting layered soil samples, determining the content of soil dissolved organic carbon, the relative molecular weight, aromaticity and maximum fluorescence intensity of soil dissolved organic matters, and identifying all organic components; constructing a partial least square path model of different soil depths, biochar addition proportions and biogas slurry retention and leaching loss of soluble organic matters; according to an operation result of the partial least square path model, explaining a regulation and control process and an improvement effect of the biochar addition proportion and biogas slurry replacement chemical fertilizer dressing on each component of the soil soluble organic matter. The method can systematically reveal an influence mechanism of improvement measures on soil carbon library stability, nutrient circulation and environmental risks, breaks through the limitation of traditional single index analysis, provides a data-driven decision model for optimizing a soil improvement scheme, and has important significance for improving soil quality and realizing agricultural green development.

Method for producing an algae lysis water concentration mixture for dosing into raw water to obtain test water for testing a water treatment plant, simulating the organic load of a natural body of water, comprising the following steps: a) Formation of an algae-water concentration mixture from Chlorella vulgaris algae contained in water, b) Lysis of Chlorella vulgaris algae using ultrasound, characterized by the fact that c) the formation of an algae-water concentration mixture from Chlorella vulgaris algae contained in water is carried out in such a way that Chlorella vulgaris algae cultivated in fermenters with a cell density of higher than 2*10^9 cell / ml are used, d) the lysis of the Chlorella vulgaris algae is carried out for such a long lysis period that the value of dissolved organic carbon reaches its maximum, e) that the lysis time is determined by preliminary tests.

The invention provides a dynamic simulation method for a seaweed culture water environment in an open sea area, which comprises the following steps of: arranging a plurality of space observation points at a seaweed culture bay, and acquiring seawater salinity, actually measured concentration of dissolved organic carbon and geographical location information of each observation point; based on two-end-member mixed analysis of a fresh water end member and a seawater end member, constructing a hydrological background correction model, and calculating the conservative mixed concentration of dissolved organic carbon at each observation point; constructing a two-dimensional hydrodynamic exchange model, simulating a bay water body flow and exchange process, and outputting water body half-exchange time and daily average water body exchange flow of each observation point; coupling the hydrological background correction model and the hydrodynamic force exchange model, and calculating the net flux of the dissolved organic carbon of the algae source at each observation point in combination with the actually measured concentration of the dissolved organic carbon at each observation point; constructing a coupling model of algae growth and dissolved organic carbon release based on the net flux of algae source dissolved organic carbon at different culture time; the simulation and prediction of the net flux of the dissolved organic carbon of the gulf algae source along with the culture time change are realized.

The disclosure relates to a method (200) of producing a liquid food product (LP), the method (200) comprising mixing (201) water (W) and a food material (F) to provide a mixture (M), heat treating (202) the mixture (M) for deactivating harmful microorganisms, evaporating (203) water from the mixture (M), to provide a stream of water vapor (WV), and a stream of liquid that forms the liquid food product (LP), condensing (204) the water vapour (WV) to form a condensate (WC), measuring (205) a dissolved organic carbon (DOC) content (C-r1) and / or a 10 conductivity in at least one of the mixture (M), the condensate (WC) and the liquid food product (LP), determining (206) a DOC content value (C-r2) and / or a conductivity value that represents the respective measured DOC content (C-r1) and conductivity, and determining (207) whether the DOC content value (C-r2) and / or the conductivity value exceeds a respective threshold (ΔC-n) that is based on a respective nominal DOC content value (C-n) and a respective nominal conductivity value. The disclosure also relates to a system.

The application discloses a new reclaimed soil exogenous carbon precise application method based on fluorescence spectrum technology, relates to the technical field of soil improvement, and specifically comprises the following steps: (1) soil background carbon activity diagnosis: collecting a new reclaimed farmland soil sample, extracting DOM in the soil, obtaining the fluorescence integral area of five characteristic peak regions through three-dimensional fluorescence spectrum scanning, calculating fluorescence parameters FI, BIX and HIX according to the proportion, and evaluating the soil carbon stability and activity short board through the fluorescence parameters; (2) exogenous carbon material screening model construction: establishing a mapping relationship between fluorescence characteristic parameters and carbon function demand; and (3) precise addition and effect verification: dynamically adjusting the types and proportions of exogenous carbon according to the diagnosis result. The application determines the soil dissolved organic carbon components through fluorescence spectrum measurement, reflects the soil carbon pool difference between the new reclaimed farmland and the mature farmland through fluorescence component analysis, selects appropriate organic material addition, and achieves the purpose of rapid composting of the new reclaimed farmland.

The invention relates to a coastal crab, shrimp and shellfish polyculture pond carbon footprint accounting method based on a culture period, and the method comprises the following steps: 1, determining a system boundary based on a culture period and a non-culture period, and the system boundary comprises a first-stage boundary and a second-stage boundary; the first-level boundary is a pond native ecosystem and covers greenhouse gas exchange flux of a water-gas interface and a soil-gas interface, stable carbon burial in sediments, carbon transfer of cultured organism biomass and form transformation and fate of inert dissolved organic carbon and dissolved inorganic carbon in a water body. According to the method, the whole-year net carbon footprint of the breeding system is accurately and completely evaluated by constructing the boundary of the whole-carbon library system, distinguishing the breeding period from the non-breeding period and integrating direct flux measurement, life cycle indirect emission accounting and quantification of various carbon sink mechanisms.