WO2008007421A1 - Appareil pour évaluer la biodégradabilité, appareil pour mesurer l'évolution de dioxyde de carbone et leur utilisation - Google Patents

Appareil pour évaluer la biodégradabilité, appareil pour mesurer l'évolution de dioxyde de carbone et leur utilisation Download PDF

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Publication number
WO2008007421A1
WO2008007421A1 PCT/JP2006/313695 JP2006313695W WO2008007421A1 WO 2008007421 A1 WO2008007421 A1 WO 2008007421A1 JP 2006313695 W JP2006313695 W JP 2006313695W WO 2008007421 A1 WO2008007421 A1 WO 2008007421A1
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Prior art keywords
carbon dioxide
oxygen
carbon
containing gas
amount
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PCT/JP2006/313695
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English (en)
Japanese (ja)
Inventor
Tadashi Yagi
Tadashi Asanuma
Takashi Tashiro
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Mitsui Chemical Analysis & Consulting Service Inc.
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Priority to JP2008524691A priority Critical patent/JP4825267B2/ja
Priority to PCT/JP2006/313695 priority patent/WO2008007421A1/fr
Publication of WO2008007421A1 publication Critical patent/WO2008007421A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
    • C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
    • C05F17/10—Addition or removal of substances other than water or air to or from the material during the treatment
    • C05F17/15—Addition or removal of substances other than water or air to or from the material during the treatment the material being gas
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
    • C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
    • C05F17/70—Controlling the treatment in response to process parameters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/141—Feedstock
    • Y02P20/145—Feedstock the feedstock being materials of biological origin
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse

Definitions

  • Biodegradability evaluation device carbon dioxide generation measurement device and its use
  • the present invention relates to a biodegradability evaluation apparatus and evaluation method suitable for evaluating biodegradability of synthetic polymers and the like according to IS014855 and the like.
  • Sarako relates to an apparatus for measuring the amount of generated carbon dioxide suitable for evaluation and its use.
  • IS014855 defines a method for evaluating biodegradability under accelerated conditions such as compost as a microbial source, and the corresponding Japanese Industrial Standard is also defined as JIS K6953.
  • the methods defined in these are relatively simple and time-consuming measurements, and it is expected that a method that can be easily measured, particularly an integrated device as an apparatus, can be provided.
  • the present inventor has intensively studied and provided composting with an apparatus that can accurately evaluate biodegradability under conditions that are simple and have different forces and an evaluation method using the same.
  • the present invention was completed by finding that the above problems can be solved by using a specific container capable of decomposing a carbon-containing compound under the conditions.
  • the present invention is an apparatus for decomposing a carbon-containing compound under composting conditions and evaluating its decomposability, a means for supplying a constant amount of oxygen-containing gas having a constant composition, and adjusting the oxygen-containing gas.
  • the present invention is also an apparatus for decomposing a carbon-containing compound under composting conditions and evaluating its decomposability, means for supplying a constant amount of oxygen-containing gas having a constant composition, and conditioning the oxygen-containing gas Decomposes carbon-containing compounds under composting conditions controlled at a constant temperature. Decomposes carbon-containing compounds, which are horizontally long and are provided with oxygen-containing gas inlets and exhaust ports at both ends.
  • the present invention also adsorbs a reaction part having an oxygen-containing gas inlet and a container filled with a carrier that adsorbs water and ammonia without adsorbing carbon dioxide connected to the reaction part and carbon dioxide.
  • Two or more sets of units in which containers connected with a carrier filled in series are switchable, a heating unit that can heat the adsorption unit, a weighing unit that measures the amount of gas adsorbed on each part of the adsorption unit, and
  • An apparatus for measuring the amount of carbon dioxide carbon generated, comprising a connecting part for connecting each part.
  • the present invention also introduces a microorganism that aerobically decomposes the carbon-containing compound and the carbon-containing compound into the reaction part using the above-described apparatus, and switches the unit at regular intervals to elapse time. This is a method for measuring the amount of diacid-carbon generated corresponding to the above.
  • FIG. 1 The results of Example 2 are shown, and the upper three curves show the integrated values of carbon dioxide produced by reaction in three containers mixed with cellulose powder. Yes, the vertical line shows the measured timing. In fact, the lower curve shows the integrated value of carbon dioxide that also generated a container force containing only the compost for comparison.
  • a means for supplying a constant amount of oxygen-containing gas having a constant composition is provided for transporting carbon dioxide generated by biodegradation.
  • an oxygen-containing gas with a constant composition By using an oxygen-containing gas with a constant composition, the composting condition can be changed to an aerobic condition, and the gas that generates force can be accurately measured.
  • the oxygen-containing gas having a constant composition for example, air is used for the above-mentioned test of IS014855. Therefore, air in a commercially available cylinder is preferably exemplified, and if a cylinder with a required capacity is used, it is continuously used during the measurement.
  • a gas having a constant composition is preferably supplied to the apparatus.
  • oxygen-containing gas can be supplied by pressurizing air with a pump, or by suction from a carbon dioxide trap. . In this case, since air in the atmosphere is used, countermeasures are required because fluctuations in the carbon dioxide content occur.
  • the apparatus and the evaluation method of the present invention have means for conditioning the oxygen-containing gas.
  • As a method for conditioning the humidity it is easy to use the oxygen-containing gas through water.
  • a commercially available gas absorption bottle can be used by introducing oxygen-containing gas into the water in a container containing water through a nozzle and collecting and using the oxygen-containing gas via the water.
  • This gas adsorption bottle can be installed inside the equipment that can be controlled to the following constant temperature, and it can be placed outside the equipment so that water absorption is performed at a temperature lower than the decomposition temperature.
  • the flow rate of the oxygen-containing gas is provided with control means such as a flow meter and a valve so that it can be controlled to a constant superficial linear velocity in a vessel in which a biodegradation reaction is performed as described later. Is preferred.
  • a means for decomposing a carbon-containing compound consisting of a vertically long container is provided.
  • the container used here is not particularly limited as long as the above-mentioned conditions are satisfied.
  • a preferable specific example is a container equipped with a lid fitted with a tube through which gas can pass at both ends of a cylindrical glass. . Only screwed lids that allow gas to pass through are commercially available and can be used. A screw with a glass tube lid fitted on both ends is also commercially available and can be used as is.
  • the container In the present invention, it is important to install the container horizontally in an environment where the container can be controlled at a constant temperature.
  • the container When the container is placed vertically, the compost is compressed by gravity and the reaction proceeds locally. In some cases, temperature control becomes difficult and correct measurement cannot be performed. In this measurement, since it is necessary to completely recover the generated carbon dioxide, it is a serious problem that the compost is compressed during the reaction since it cannot be stirred later once charged. is there.
  • the horizontal placement is not necessarily horizontal as long as there is no trouble such as compression or drift of oxygen-containing gas, but it is preferable that the inclination is 30 degrees or less. .
  • the sample is uniformly filled except in the vicinity of the introduction port and the exhaust port. Further, it is preferable that the oxygen-containing gas flows substantially uniformly throughout.
  • the flow rate of the oxygen-containing gas is 0.01 to 10 cmZmin, preferably 0.02 to 2 cmZmin, particularly 0.05 to 0.7 cmZmin, expressed in terms of the superficial linear velocity.
  • the container preferably has a LZD of 1 to 20, particularly 2 to L0. If the LZD is too small, air circulation is not possible. It may become uniform, and if it is too large, the container becomes long and the apparatus becomes undesirably large.
  • the cylinder may have an elliptical shape that does not necessarily have a circular cross section. In the case of an ellipse, L means the long axis.
  • a container capable of mounting a large number of containers of the present invention may be specially manufactured. May be used. Tests according to ISO may require a temperature control of ⁇ 2 ° C.
  • the present invention has means for collecting diacid carbon in the oxygen-containing gas from which the exhaust port force of the vertically long container is also discharged, and the diacid oxide in the discharged oxygen-containing gas is provided.
  • introduction into an alkaline aqueous solution is preferred.
  • ammonia gas is also generated from compost at the same time. First, only ammonia is absorbed with acidic water, and then the oxygen-containing gas is dried, and then the diacid and carbon are reacted with alkali to give the diacid by weight.
  • the dry method of measuring carbon may be a method in which both are absorbed simultaneously in an alkaline aqueous solution such as hydroxya natrim and measured by titration.
  • a sodium hydroxide solution that is a two-step reaction at the time of the titration is selected, and the titration point of the ammonium hydroxide solution is covered. It is important to calculate the titration volume from titration point 2 and titration point 3.
  • the biodegradation reaction container containing various composts can be freely replaced, and the temperature can be arbitrarily adjusted.
  • compost with a clear identity as a control and using the same object such as cellulose, the activity, curing degree, reactivity, etc. of the obtained compost can be evaluated.
  • the reaction part is a part that generates diacid carbon by some reaction.
  • a relatively small amount of carbon dioxide is used. It is the part that reacts to occur for a long time. Specifically, it is a part that reacts to decompose carbon-containing compounds and generate carbon dioxide by microorganisms.
  • a sealed container equipped with a device that can be agitated as necessary, introduced with an oxygen-containing gas such as air, and provided with a port through which the gas in the container can be discharged can be exemplified.
  • the adsorbing section is filled with a container filled with a carrier that adsorbs water and ammonia without adsorbing carbon dioxide and carbon dioxide linked to the reaction section, and a carrier that adsorbs carbon dioxide.
  • a container filled with the carrier is preferably in a shape that allows sufficient contact between the gas flowing in the container and the carrier.
  • a relatively large cylindrical pipe can be preferably used.
  • the carrier that does not adsorb carbon dioxide and adsorbs water and ammonia may be any carrier that has such properties, but specifically, zeolite that is known as a molecular sieve.
  • a system carrier can be preferably used, and a zeolite known as molecular sieve 3A is preferably exemplified.
  • the shape is not particularly limited, but preferred is a granular or powdery shape, which is preferred to have properties such as easy contact with gas, heating, and cooling. Any carrier capable of adsorbing carbon may be used as long as it has such properties.
  • a zeolite-type carrier known as a molecular sieve can be preferably used, and molecular sieve 4A.
  • Zeolite known as is preferably exemplified. Further, it may be one that reversibly reacts with carbon dioxide such as calcium carbonate obtained by calcining calcium carbonate at 900 ° C. or higher.
  • the filling amount of the carrier is known for each carrier depending on the amount of carbon dioxide generated and the measurement time, and may be determined with a margin based on the amount of adsorption.
  • the container filled with the carrier is connected to the reaction part, the container filled with the carrier that adsorbs water and ammonia without adsorbing carbon dioxide in the direction in which the gas is introduced, and then in series And a container filled with a carrier that adsorbs carbon dioxide. It is preferable that a valve that can be separated and branched is attached to the connecting portion. Two or more sets of these connected units are arranged for sequential use, and it is preferable that a valve is attached to the connecting part so that it is preferable to switch sequentially. [0028] These containers are provided with a heating section so that they can be heated.
  • the container filled with the carrier can be heated to a temperature at which the carrier can desorb carbon dioxide, heated to 900 ° C or higher for calcium oxide, and about 300 ° C when zeolite is used. It can be used as long as it has the ability to do so, and there is no particular restriction.
  • a device that generates hot air and a device that also serves as a tank covering the container, or a ribbon heater can be used, but the temperature is controlled. What added the function which can be performed is illustrated preferably.
  • any metering unit for metering the amount of gas adsorbed on each part of the adsorption unit can be used as long as it can measure the gas desorbed by heating or the like. It is okay.
  • the amount of desorbed gas can be known from the change in pressure. If the carrier that adsorbs carbon dioxide adsorbs anything other than carbon dioxide and carbon dioxide, it can be confirmed only by introducing the desorbed gas into the container and knowing the pressure change. You can know the amount of carbon dioxide. Also, by knowing the concentration of carbon dioxide in the gas of the metering unit by the detector, it is confirmed that the gas adsorbed by the adsorption unit is carbon dioxide, and further, the dead space of the adsorption unit The amount of unreacted oxygen-containing gas can be corrected.
  • the detection unit may be any unit capable of measuring the carbon dioxide concentration, such as gas chromatography or infrared absorption spectrum. Knowing the carbon dioxide concentration is a well-known technique, and it is possible to improve the accuracy and the like by further combining known techniques in addition to the above. In addition, it is no problem to measure dioxin carbon by reducing it and converting it to methane or measuring it as total carbon!
  • the measurement apparatus of the present invention combining the above-described parts can automatically perform all subsequent operations if a reaction is started by adding materials to the reaction part by combining the following well-known techniques. It can be a device that measures the data and outputs the result.
  • the heating unit is operated at a certain timing for desorption of the adsorbed gas, and a pressure gauge that can output a signal proportional to the pressure of the desorbed gas, a gas outlet matography that can output a carbon dioxide concentration, etc. Operation such as introducing the above equipment into a measuring unit, sending measurement results such as pressure and carbon dioxide concentration of the measuring unit to a computer, collecting data, calculating the amount of carbon dioxide generated, and outputting the result. It is well known.
  • the unit of the adsorption unit for which the measurement has been completed is regenerated by heating, degassing and cooling, and is used again at an appropriate timing by automatically operating the valve.
  • aerobically degrading microorganisms are used to decompose a carbon-containing compound to generate a diacid-carbon, and respond to the passage of time.
  • the amount of ammonia generated can be measured by desorbing the ammonia adsorbed on the former stage zeolite and measuring the amount.
  • the unit of the adsorption unit is cut off from the reaction unit and then connected to the measuring unit, and the system of the adsorption unit is evacuated without heating. If the unit is shut off and the unit of the adsorption unit is heated and measured, it is possible to devise measures such as not mixing gas in the dead space of the adsorption unit into the weighing unit!
  • the alkaline aqueous solution of each bubbler provided as a trap is made up to 300 mL with ion-exchanged water, extracted at 15 mL / distillation, and titrated to determine the amount of carbon dioxide and the theoretical generation of cellulose powder.
  • the biodegradation rate was continuously examined in comparison with the amount.
  • the test was completed on the 40th day after the start of the test because carbon dioxide dioxin, which also generated equipment with a compost mixed with paper after 30 days, exceeded 70% of the theoretical amount.
  • there were no abnormalities such as a sudden increase or decrease in the amount of carbon dioxide and carbon dioxide, and the observation of compost after the test was also local, particularly anaerobic. Such abnormalities were not observed.
  • the difference in the amount of carbon dioxide generated in 3 sets was less than 5% o
  • Example 2 Except that the air flow rate was 7.5 mLZmin, the same procedure as in Example 1 was carried out. The test was terminated because it exceeded. During the test, there was no abnormality such as a sudden increase or decrease in the amount of carbon dioxide generated, and the observation results of compost after the test were also abnormal, such as local reactions, especially anaerobic reactions. Was unobserved. The variation of the three sets of generated carbon dioxide was 10%.
  • the container was 71 mm in diameter and 250 mm in length, and the air flow rate was lOmLZmin.
  • the test was completed because the amount of carbon dioxide that generated the strike force exceeded 70% of the theoretical amount.
  • there was no abnormality such as a sudden increase or decrease in the amount of carbon dioxide, and the observations of compost after the test seemed to have a local reaction, especially an anaerobic reaction. No abnormalities were observed.
  • the noise of the three sets of generated carbon dioxide was 10%.
  • Example 3 A similar experiment was conducted except that the container used in Example 3 was placed vertically, and air was introduced downward from above. The test was completed because the amount of carbon dioxide produced exceeded 50% of the theoretical amount. During the test, abnormalities such as a sudden increase or decrease in the amount of carbon dioxide were observed. As for the compost observation after the test, abnormalities such as local reactions and anaerobic reactions were observed in the contrasting containers. The variation of the three sets of generated carbon dioxide was 20%, which was larger than that of the example. Air was introduced from above and extracted from below.
  • the flow rate of air was increased to 30mLZmin, and the same procedure as in Comparative Example 1 was performed, except that it was introduced from below and withdrawn from above.As a result, a device force containing compost mixed with cellulose powder was also generated after 30 days.
  • the test was terminated because the amount of carbon dioxide was over 40% of the theoretical amount. During the test, abnormalities such as a sudden increase or decrease in the amount of carbon dioxide were observed. The observation of compost after completion of the test showed no particular abnormality.
  • the variation of the three sets of generated diacid carbon was 20%, which was larger than that of the example.
  • Two external cylinders with an inner diameter of 10 mm and an internal volume of about 100 ml are connected to each other, and each column is packed with 100 g of 4 A powder and molecular sieve 3 A powder made by Sakai Kogyo Co., Ltd.
  • One set of adsorbing parts consisting of three sets of units is connected with air having a dew point of 40 ° C (51 mg / L) with carbon dioxide of 100 mg / L for 12 hours at lL / h. After 12 hours, the mixed air is introduced into another set, and the first set is disconnected from the system by operating the valve. Then connect to a vacuum pump and reduce pressure to 0. OlmmHg in 1 second. To do.
  • the tank is held at 20 ° C and its pressure is measured.
  • the amount of carbon dioxide adsorbed on the molecular sieve 4A can be calculated by a conventional method. The change is equivalent to 230mmHg. If this operation is continued 10 times, the average pressure is 229mmHg ⁇ 30mmHg, indicating that the amount of carbon dioxide adsorbed can be accurately measured. It can be understood that the amount of carbon dioxide generated can be measured continuously by connecting a reaction section to the column and introducing a sample that generates a small amount of carbon dioxide into the reaction section and then introducing air into the reaction section.
  • the pair to be separated (connected to a vacuum pump and depressurized to 0.01 mm Hg in 1 second) is then connected to a tank with an internal volume of 500 ml held in a vacuum. In this state, disconnect the column with the molecular sieve 3A and remove the column with the 4A. Heat and treat at 250 ° C for 1 hour, then disconnect the tank from the column force. The column is then connected to a vacuum pump and treated for a further 20 minutes at less than 0.OOlmmHg. The carbon dioxide generated in 10 hours when carbon dioxide is generated is 1 lmg / 10 hours from 85 mmHg of pressure change.
  • biodegradability can be evaluated efficiently and accurately, which is extremely useful for evaluating biodegradability of synthetic polymers.

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  • Chemical & Material Sciences (AREA)
  • Microbiology (AREA)
  • Molecular Biology (AREA)
  • Engineering & Computer Science (AREA)
  • Biochemistry (AREA)
  • Biotechnology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Processing Of Solid Wastes (AREA)
  • Fertilizers (AREA)
  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
  • Apparatus Associated With Microorganisms And Enzymes (AREA)
  • Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)

Abstract

La présente invention concerne un appareil de dégradation d'un polymère biodégradable dans des conditions de compostage permettant ainsi d'évaluer son aptitude à la dégradation comportant : un moyen pour fournir une quantité spécifique d'air ayant une composition définie ; un moyen pour contrôler le taux d'humidité de l'air ; un moyen pour contrôler la température à un niveau défini situé à côté duquel est prévu un récipient verticalement allongé pour dégrader un polymère biodégradable dans des conditions de compostage comprenant un orifice d'admission d'air déchargé depuis le récipient verticalement allongé, et dans lequel ces moyens sont interconnectés tout en interdisant une fuite d'air. L'invention concerne également un appareil pour mesurer l'évolution de dioxyde de carbone caractérisé en ce qu'il comporte : une partie de réaction ayant un orifice d'admission de gaz contenant de l'oxygène ; une partie d'adsorption qui est reliée à la partie de réaction et dans laquelle au moins deux unités comprenant chacune un récipient garni d'un support n'adsorbant pas de dioxyde de carbone mais adsorbant l'eau et l'ammoniac et un autre récipient adsorbant du dioxyde de carbone sont connectées en série de manière commutable ; une partie de chauffage grâce à laquelle la partie d'adsorption peut être chauffée ; une partie de mesure pour mesurer la quantité de gaz adsorbé par chaque élément dans la partie d'adsorption ; et des parties de raccordement grâce auxquelles les parties individuelles susmentionnées sont interconnectées.
PCT/JP2006/313695 2006-07-10 2006-07-10 Appareil pour évaluer la biodégradabilité, appareil pour mesurer l'évolution de dioxyde de carbone et leur utilisation WO2008007421A1 (fr)

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JP2008524691A JP4825267B2 (ja) 2006-07-10 2006-07-10 生分解性評価装置および評価方法
PCT/JP2006/313695 WO2008007421A1 (fr) 2006-07-10 2006-07-10 Appareil pour évaluer la biodégradabilité, appareil pour mesurer l'évolution de dioxyde de carbone et leur utilisation

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PCT/JP2006/313695 WO2008007421A1 (fr) 2006-07-10 2006-07-10 Appareil pour évaluer la biodégradabilité, appareil pour mesurer l'évolution de dioxyde de carbone et leur utilisation

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Cited By (4)

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Publication number Priority date Publication date Assignee Title
JP2011167151A (ja) * 2010-02-22 2011-09-01 National Institute For Materials Science 生分解性試験方法及びフラーレンファイバー含有医用材料
CZ303798B6 (cs) * 2011-12-15 2013-05-09 Ceská zemedelská univerzita v Praze, Technická fakulta Zarízení pro testování biodegradability papíru a obalových materiálu
CN113671100A (zh) * 2020-05-15 2021-11-19 中国科学院理化技术研究所 高分子材料在海洋环境中的降解性能检测装置
CN115197829A (zh) * 2022-09-19 2022-10-18 湖南碧臣环境能源有限公司 一种好氧生物降解性测试系统及方法

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011167151A (ja) * 2010-02-22 2011-09-01 National Institute For Materials Science 生分解性試験方法及びフラーレンファイバー含有医用材料
CZ303798B6 (cs) * 2011-12-15 2013-05-09 Ceská zemedelská univerzita v Praze, Technická fakulta Zarízení pro testování biodegradability papíru a obalových materiálu
CN113671100A (zh) * 2020-05-15 2021-11-19 中国科学院理化技术研究所 高分子材料在海洋环境中的降解性能检测装置
CN115197829A (zh) * 2022-09-19 2022-10-18 湖南碧臣环境能源有限公司 一种好氧生物降解性测试系统及方法
CN115197829B (zh) * 2022-09-19 2022-12-30 湖南碧臣环境能源有限公司 一种好氧生物降解性测试系统及方法

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