scholarly journals EXPERIMENTAL REEARCH ON APPLYING LAVSAN IN THE AIR BIOFILTRATION PROCESS / LAVSANO TAIKYMO ORO BIOFILTRACIJOS PROCESE EKSPERIMENTINIAI TYRIMAI

2013 ◽  
Vol 5 (4) ◽  
pp. 376-381 ◽  
Author(s):  
Alvydas Zagorskis ◽  
Aleksandra Milaknytė
Keyword(s):  
Environmental Protection ◽  
Cleaning Efficiency ◽  
Initial Concentration ◽  
Air Cleaning ◽  
Air Volume ◽  
Air Stream ◽  
Cleaning Device ◽  
Rich Solution ◽  
Material Load ◽  
Air Biofiltration

Air cleaning efficiency tests on placing material load into the lavsan biofilter were carried out. Testing included butanol vapour-contaminated air stream pulled during the boot. The studies were conducted by the Department of Environmental Protection at VGTU that developed a biofilter – an experimental biological air cleaning device. Measurements were done using 60 l/min and 90 l/min air volume aspirators under the initial pollutant concentration making 180, 305, 350, 440 and 545 mg/m3. Before measuring the concentrations of butanol lavsan cartridge, loading was periodically irrigated with nutrient-rich solution. In order to evaluate the influence of microorganisms on genus Pseudomonas, cleaning efficiency tests were repeated – Boot was moistened with water only, which allowed measuring butanol vapour concentrations after the cartridge. At the concentration of 180±9 mg/m3, efficiency reached 41% at a speed of 0,07 m/s and 46 % at a speed of 0,10 m/s. Measuring the performance of the initial concentration of 545±67 mg/m3, efficiency was 54% at 0,07 m/s and 53 % at 0,10 m/s respectively. Article in Lithuanian. Santrauka Atlikti oro valymo efektyvumo tyrimai į lašelinį biofiltrą įkrovus lavsano medžiagos įkrovą. Bandymų metu pro įkrovą buvo traukiamas butanolio garais užterštas oro srautas. Tyrimai atliekami naudojant VGTU Aplinkos apsaugos katedroje sukurtą eksperimentinį biologinį oro valymo įrenginį – biofiltrą. Matavimai atlikti leidžiant 60 l/min. ir 90 l/min. oro kiekį aspiratoriumi. Pradinės teršalo koncentracijos – 180, 305, 350, 440, 545 mg/m3. Prieš matuojant butanolio koncentracijas panaudojant lavsano medžiagos kasetę, įkrova buvo periodiškai drėkinama maistinių medžiagų prisotintu tirpalu. Pseudomonas genties mikroorganizmų įtakai valymo efektyvumui įvertinti tyrimai buvo pakartoti – įkrovos sudrėkinamos tik vandeniu, leidžiami butanolio garai, ir matuojamos koncentracijos panaudojus lavsano medžiagos kasetę. Esant 180±89 mg/m3 koncentracijai biofiltro oro valymo efektyvumas siekė 41 %, kai per įkrovą leidžiamo dujų srauto greitis buvo 0,07 m/s, ir 46 %, kai greitis 0,10 m/s. Nustatyta valymo efektyvumas. Esant 545±55 mg/m3 pradinei koncentracijai jis siekė 54 % (0,07 m/s) ir 53 % (0,10 m/s).

scholarly journals PLASMA COATING FORMED TIO2 CATALYSTS USAGE IN CLEANING THE AIR FROM NITROGEN OXIDES AND CARBON MONOXIDE / PLAZMINIU PURŠKIMU SUFORMUOTŲ TIO2 KATALIZATORIŲ TAIKYMAS VALANT IŠ ORO AZOTO OKSIDUS IR ANGLIES MONOKSIDĄ

2015 ◽  
Vol 7 (4) ◽  
pp. 365-371
Author(s):  
Vitalij Kolodynskij ◽  
Pranas Baltrėnas
Keyword(s):  
Carbon Monoxide ◽  
Nitrogen Oxides ◽  
Plasma Coating ◽  
Air Purification ◽  
Average Flow Rate ◽  
Cleaning Efficiency ◽  
Average Flow ◽  
Air Cleaning ◽  
Air Stream ◽  
Cleaning Device

The present catalytic air purification device–air cleaning device is capable to reduce nitrogen oxide sand carbon monoxide concentrations in polluted air stream and to achieve high cleaning efficiency. The principle of operation of catalytic air cleaning device is based on plasma coating formed catalysts usage. At high temperatures and oxygen concentrations in the experimental device channel, catalysts become active and reactions of conversion of pollutants start. In this research, the efficiency of cleaning the air from nitrogen oxides and carbon monoxide, by using plasma coating formed titanium oxide and copper-chromium catalysts, is carried out. 50% propane – 50% butane gas mix was used to generate polluted air flow. The maximum cleaning efficiency, cleaning the air of nitrogen oxides and carbon monoxide, reached 86% and 77%, when the average flow rate of polluted air was 0.10 m/s, oxygen concentration in II section of device was 0.5–0.6% and in I section – 0.1–0.2%. Nagrinėjamas įrenginys – katalitinis oro valymo įrenginys, mažinantis azoto oksidų ir anglies monoksido koncentracijas užterštame oro sraute. Katalitinis oro valymo įrenginys veikia naudodamas plazminiu purškimu suformuotus katalizatorius. Esant aukštai temperatūrai ir optimaliai deguonies koncentracijai įrenginio eksperimentiniame kanale, katalizatorių paviršius tampa aktyvus, ir vyksta sudėtingos teršalų konversijos reakcijos. Atliktuose tyrimuose nagrinėtas suminis titano oksido ir vario-chromo oksido katalizatorių, kurie buvo pagaminti plazminio purškimo metodu, srauto, užteršto azoto oksidais ir anglies monoksidu, valymo efektyvumas. Užterštam oro srautui sugeneruoti buvo naudojamas 50 % propano – 50 % butano dujų mišinys. Didžiausias valymo efektyvumas, valant orą nuo azoto oksidų ir anglies monoksido, atitinkamai siekė 86 % ir 77 %, esant 0,10 m/s vidutiniam užteršto srauto greičiui, 0,5–0,6 % deguonies koncentracijai II-ojoje įrenginio sekcijoje ir 0,1–0,2 % deguonies koncentracijai I-ojoje įrenginio sekcijoje.

scholarly journals Analysis of the Sieve Unit Inclination Angle in the Cleaning Process of Oat Grain in a Rotary Cleaning Device

Processes ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 346
Author(s):  
Zbigniew Krzysiak ◽  
Waldemar Samociuk ◽  
Janusz Zarajczyk ◽  
Zdzisław Kaliniewicz ◽  
Daniel Pieniak ◽  
...  
Keyword(s):  
Inclination Angle ◽  
Mass Separation ◽  
Separation Coefficient ◽  
Cleaning Process ◽  
Cleaning Efficiency ◽  
Work Related ◽  
Multi Stage ◽  
Air Stream ◽  
Cereal Grain ◽  
Cleaning Device

The article presents some of the research on the wider work related to testing and improving a new rotary cleaning device. The new cereal grain cleaning and separation device can support the development of sustainable agriculture in terms of seed purity and quality. This device is especially useful for small and medium-sized farms. This device has the characteristics of a multi-stage screen aided by an air stream (i.e., by pneumoseparation). The prototype was constructed at the University of Life Sciences in Lublin. The research was conducted at a test stand, which allowed changes in the operating parameters of the cleaner and their measurement. The scope of the tests included determining the influence of the inclination angle of the sieve unit (α) on the effectiveness and efficiency of oat grain cleaning. The experiment was carried out using two rotational spindle speeds: 5 and 75 rpm. The quality of the separation and cleaning of oat grains was evaluated using six cleaning process parameters: plump grain mass separation coefficient (Spg), fine grain separation coefficient (Sfg), fine impurities separation coefficient (Sfi), chaff separation coefficient (Sch), total coefficient of cleaning effectiveness (E), plump grain cleaning efficiency (qpg). Results showed the significant effect of the sieve drum inclination angle on the efficiency and effectiveness of oat grain cleaning.

scholarly journals ANALYSIS OF EXPERIMENTAL RESEARCH ON CYCLONES WITH CYLINDRICAL AND SPIRAL SHELLS / CIKLONŲ SU CILINDRINIU IR SPIRALINIU KORPUSAIS EKSPERIMENTINIŲ TYRIMŲ ANALIZĖ

2012 ◽  
Vol 5 (4) ◽  
pp. 479-486 ◽  
Author(s):  
Aleksandras Chlebnikovas ◽  
Pranas Baltrėnas
Keyword(s):  
Experimental Research ◽  
Dynamic Pressure ◽  
Air Flow ◽  
Solid Particles ◽  
Maximum Efficiency ◽  
Particulate Matters ◽  
Cleaning Efficiency ◽  
Initial Concentration ◽  
Air Cleaning ◽  
Flow Parameters

The conducted investigation is aimed at providing information on air flow parameters in the cylindrical and spiral shell (devices are designed for separating solid particles from air flow having tangent flow inlet). Experimental research has employed multi-cyclones created by the Department of Environmental Protection at Vilnius Gediminas Technical University. The study is focused on investigating and comparing the distribution of the dynamic pressure of the airflow in six-channel cyclones inside the structures of devices. The paper establishes and estimates the efficiency of air cleaning changing air phase parameters using different particulate matters. The efficiency of the cyclone has been defined applying the weighted method based on LAND 28-98/M-08 methodology. The article presents the results of experimental research on the air cleaning efficiency of cylindrical and spiral shells using 20 µm glass and clay particulate matter under the initial concentration that may vary from 500 mg/m3 to 15 g/m3 using semi-rings with windows at different positions. The obtained results has shown that the maximum efficiency of the cylindrical shell increases up to 87,3 % while the initial concentration of glass makes 15 g/m3. Santrauka Nagrinėjami ir tarpusavyje lyginami oro srauto parametrai, jų kitimas ir valymo efektyvumas cilindriniame ir spiraliniame ciklone (įrenginiai skirti kietųjų dalelių iš oro srauto su tangentinio srauto įtekėjimu atskyrimui). Eksperimentinių tyrimų metu naudojami daugiakanaliai ciklonai, sukurti Vilniaus Gedimino technikos universiteto Aplinkos apsaugos katedroje. Tyrimais buvo siekiama išanalizuoti ir palyginti kanalinių ciklonų oro srauto dinaminių slėgių pasiskirstymą įrenginių konstrukcijos viduje, nustatyti ir palyginti oro valymo efektyvumą, kintant oro fazės parametrams, panaudojant skirtingas kietąsias daleles. Ciklonų efektyvumai nustatyti svoriniu metodu, remiantis LAND 28-98/M-08 metodika. Pateikiami cilindrinio ir spiralinio korpusų ciklonų stiklo ir molio 20 µm kietųjų dalelių atskyrimo tyrimų rezultatai, esant įleidžiamai užteršto oro koncentracijai 500 mg/m3 – 15 g/m3, keičiant skirtingos geometrijos kreivalinijinius pusžiedžius. Nustatyta, kad efektyviausiai atskiriamos yra kietosios stiklo dalelės, esant 15 g/m3 pradinei koncentracijai, maksimalus efektyvumas nustatytas cilindriniame ciklone, jis siekia 87,3 %.

scholarly journals Experimental investigation of a one-level eight-channel cyclone-separator incorporating quarter-rings

2021 ◽  
Vol 75 (4) ◽  
pp. 241-251
Author(s):  
Aleksandras Chlebnikovas
Keyword(s):  
Particulate Matter ◽  
Collection Efficiency ◽  
Cascade Impactor ◽  
Cyclone Separator ◽  
Cleaning Efficiency ◽  
Air Cleaning ◽  
Before And After ◽  
Cleaning Device ◽  
The One ◽  
Pm2.5 And Pm10

The main aim of this investigation was an experimental analysis of the air cleaning efficiency in a mock-up next-generation air cleaning device - one-level 8-channel industrial cyclone-separator with quarter-rings - while changing parameters of the inner structure and the assessment of the effects of dispersion of particulate matter. Therefore, the research was carried out in two stages: the first stage covered the analysis of the efficiency of the multi-channel cyclone with particulate matter of <20 and <50 ?m. During the second stage, a cascade impactor was used to measure the particle collection efficiency in the multi-channel cyclone by fractions: PM1, PM2.5 and PM10. Results of the tests with using the cascade impactor were compared to show changes in the PM composition before and after the multi-channel cyclone-separator. According to the obtained experimental data, the one-level 8-channel cyclone-separator collects 70 to 80 % of PM up to 10 ?m in size, 45 to 60 % of PM up to 2.5 ?m in size and 21 to 25 % of PM up to 1 ?m in size.

Effect of Sieve Unit Inclination Angle in a Rotary Cleaning Device for Barley Grain

2020 ◽  
Vol 63 (3) ◽  
pp. 609-618
Author(s):  
Zbigniew Krzysiak ◽  
Waldemar Samociuk ◽  
Janusz Zarajczyk ◽  
Karolina Beer-Lech ◽  
Grzegorz Bartnik ◽  
...  
Keyword(s):  
Inclination Angle ◽  
Barley Grain ◽  
Separation Coefficient ◽  
List Type ◽  
Technological Parameters ◽  
Cleaning Efficiency ◽  
Multi Stage ◽  
Cereal Grain ◽  
Cleaning Device

Highlights Cleaning cereal grain after harvest is very important for the quality of the product. Technological progress enables the design of new equipment for cleaning cereal grain. Grain segregation allows selecting the best grain to increase yields. The quality of segregation depends on the technological parameters of the device. Abstract. This article presents the results of laboratory tests of a new rotary cleaning device used for the separation and cleaning of barley grain. This device has the characteristics of a multi-stage screen assisted by an air stream (i.e., pneumo-separation). The prototype was constructed at the University of Life Sciences in Lublin, Poland. The tests were conducted on a test stand, which allowed changes in the operating parameters of the cleaning device and their measurement. The tests included determining the influence of the sieve drum inclination angle (a) on the effectiveness and efficiency of barley grain cleaning. The tests were carried out using two drum rotational speeds: 5 rpm and 75 rpm. The quality of the separation and cleaning of barley grain was evaluated using six cleaning process parameters: plump grain separation coefficient (Spg), fine grain separation coefficient (Sfg), fine impurities separation coefficient (Sfi), chaff separation coefficient (Sch), total coefficient of cleaning effectiveness (E), and plump grain cleaning efficiency (qpg). The results showed significant effects of the sieve drum inclination angle on the efficiency and effectiveness of barley grain cleaning. Keywords: Barley grain, Conical sieve, Grain separation, Rotary cleaning device.

Research and Analysis on the Mechanical Characteristics of Brush Shape Cleaning Element in Spiral Installation

2010 ◽  
Vol 97-101 ◽  
pp. 3565-3570
Author(s):  
Yan Mei Meng ◽  
Zhen Dong ◽  
Fu Ning Lu ◽  
Shang Ping Li ◽  
Kai Xu
Keyword(s):  
Maximum Stress ◽  
Working Process ◽  
Cleaning Efficiency ◽  
Element Analysis ◽  
Structural Forces ◽  
Air Resistance ◽  
Structural Force ◽  
Cleaning Device ◽  
Sugarcane Harvester ◽  
Spiral Angle

The cleaning element is not only the key part of the sugarcane harvester, but it is also the bottleneck of the development within the whole stalk of the sugarcane harvester. In this paper, it will theoretically elaborate on the structural forces that act on the spiraled and brushed shape cleaning elements during the process of the sugarcane cleaning. The paper also elaborates on the combined rigidity of elements in different arrangement installations and the maximum stress that acts on its roots. In addition to this，the FEA (Finite Element Analysis) software-ANSYS is used to analyze the structural force, the maximum stress, and the air resistance that is generated during the working process. The results of the analysis have been validated by experimentations. The experimental results indicate that, with the proper spiral angle cleaning element installed, it can both enhance the cleaning efficiency and reduce the maximum stress and the air resistance. Accordingly, it can improve the cleaning quality, prolong the working life of the cleaning element, and reduce the idling power waste of the cleaning device.

scholarly journals INVESTIGATION OF CLEANING EFFICIENCY OF BIOLOGICAL AIR‐TREATMENT DEVICE WITH ACTIVATED CHARGE OF DIFFERENT ORIGIN/BIOLOGINIO ORO VALYMO ĮRENGINIO SU AKTYVINTA SKIRTINGOS KILMĖS ĮKROVA VALYMO EFEKTYVUMO TYRIMAI/ ИССЛЕДОВАНИЕ ЭФФЕКТИВНОСТИ УСТАНОВКИ ДЛЯ БИОЛОГИЧЕСКОЙ ОЧИСТКИ ВОЗДУХА С АКТИВИРОВАННОЙ ЗАГРУЗКОЙ РАЗЛИЧНОГО ПРОИСХОЖДЕНИЯ

2008 ◽  
Vol 16 (3) ◽  
pp. 113-120 ◽  
Author(s):  
Pranas Baltrėnas ◽  
Alvydas Zagorskis
Keyword(s):  
Treatment Method ◽  
Wood Chips ◽  
Treatment Efficiency ◽  
Cleaning Efficiency ◽  
Air Treatment ◽  
Air Cleaning ◽  
Service Period ◽  
Treatment Technologies ◽  
A Charge ◽  
Different Origin

In order to carry out an experimental investigation a biological air‐treatment device was used, namely, a biofilter with a charge of a different origin composed of zeolite, foam and wood chips. When mixing foam and zeolite together with wood chips for air treatment from volatile organic compounds, not only a biological but also adsorptive air‐treatment method is used. Using complex treatment technologies the device efficiency and the charge service period are improved. The investigation has shown that microorganisms, being predominant in the bio‐treatment process, can breed in charges of on inorganic origin made of natural zeolite and foam. While cultivating spontaneous microorganism associations in the charge, biofilter treatment efficiency was determined to be dependent on the sort of the supplied pollutant, concentration and filtration period. The charge filtration function was most efficient at a velocity of 0,1 m/s when the device was supplied with acetone‐polluted air. Cleaning air from acetone, when the original concentration of the pollutant was 103 mg/m3, the filter treatment efficiency reached 95%. When the concentration of pollutants supplied into the biofilter is reduced and the filtration period is increased, the device treatment efficiency increases as well. Santrauka Eksperimentiniams tyrimams atlikti buvo naudotas biologinis oro valymo įrenginys – biofiltras užkrautas skirtingos kilmės įkrova, sudaryta iš ceolito, porolono ir medienos drožlių. Poroloną ir ceolitą maišant su medienos drožlėmis lakiesiems organiniams junginiams valyti iš oro taikomas ne tik biologinis, bet ir adsorbcinis oro valymo metodas. Kompleksiškai taikant skirtingas valymo technologijas pagerinamas įrenginio valymo efektyvumas ir įkrovos naudojimo laikas. Tyrimai parodė, kad biologinio valymo procese vyraujantys mikroorganizmai gali daugintis ir neorganinės kilmės įkrovose, sudarytose iš gamtinio ceolito bei porolono. Įkrovoje kultivuojant savaiminių mikroorganizmų asociacijas nustatytos biofiltro valymo efektyvumo priklausomybės nuo tiekiamo teršalo rūšies, koncentracijos, filtracijos laiko. Geriausiai įkrova filtravo 0,1 m/s greičiu į įrenginį tiekiamą acetonu užterštą orą. Valant iš oro acetoną, kai pradinė teršalo koncentracija yra 103 mg/m3 , filtro valymo efektyvumas siekė 95 %. Mažinant į biofiltrą tiekiamų teršalų koncentracijas ir didinant jų filtracijos laiką, įrenginio valymo efektyvumas didėja. Peзюме Для выполнения экспериментальных исследований использовалось биологическое устройство для очистки воздуха – биофильтр, загруженный загрузкой различной породы, состоящей из цеолита, поролона и древесины. При смешивании поролона, цеолита и древесины для очистки воздуха от летучих органических составов применялся не только биологический, но и aдсорбционный метод очистки воздуха. При совместном применении разных технологий очистки улучшается эффективность устройства и продлевается срок действия загрузки. Исследование показало, что микроорганизмы могут размножаться и на загрузках неорганического происхождения, состоящих из природного цеолита и поролона. При выращивании самопроизвольных ассоциаций микроорганизмов установлены зависимости эффективности очистки воздуха от вида поступающего загрязнителя, концентрации и периода фильтрации. Фильтрация была наилучшей, когда воздух, загрязненный ацетоном, подавался в биофильтр со скоростью 0,1 м/сек. Эффективность биофильтра при очищении воздуха от ацетона, первоначальная концентрация которого составляла 103 мг/м3 , достигала 95%. Эффективность очищения воздуха в устройстве увеличивается, когда концентрация поставляемых в биофильтр загрязнителей уменьшается, а период фильтрации продлевается.

Air Cleaning Device for Motor Vehicles Using a Low-Voltage Conductive Filter

1993 ◽  
Author(s):  
Hideo Yoshikawa ◽  
Takeshiro Komatsu ◽  
Takashi Ikeda ◽  
Fumio Miyamoto
Keyword(s):  
Low Voltage ◽  
Motor Vehicles ◽  
Air Cleaning ◽  
Cleaning Device

A Study on the Control of Bio-Aerosol for Prevention of Indoor Aerial Infection Using Antimicrobial Air Filter

2013 ◽  
Vol 284-287 ◽  
pp. 1601-1605 ◽  
Author(s):  
Kyung Mi Lee ◽  
Byong Hyoek Lee ◽  
Chan Jung Park
Keyword(s):  
Antimicrobial Activities ◽  
Influenza Viruses ◽  
Human Influenza Virus ◽  
Air Filter ◽  
Air Cleaning ◽  
Biological Contaminants ◽  
Cleaning Device ◽  
Viral Survival ◽  
Antiviral Activities ◽  
Biological Protection

Some indoor bio-aerosols trigger allergic reactions, including hypersensitivity pneumonitis, allergic rhinitis, and various types of asthma. Moreover, human influenza virus is one of the bio-aerosols that causes significant morbidity and mortality every year worldwide. Although vaccination is the most effective way to address the risk of airborne infection, they are not always feasible, available and practiced. An air cleaning device is effective and efficient in removing indoor bio-aerosols and thereby controlling or eliminating these airborne biological contaminants. An antimicrobial filter is developed and its antimicrobial activities against influenza viruses are measured. An extract from Gingko Biloba L. and Sumac (Rhus Javanica L.) possesses antifungal, antibacterial, and antiviral activities thus this class of natural products is used as an antimicrobial agent in this study. An antimicrobial air filters were prepared by coating the natural agent on polypropylene filter media. The antimicrobial rates of the filter against new influenza (H1N1) virus and A/PuertoRico/8/34 (A/PR/8) virus were greater than 99.9999%. The antimicrobial filters were effective in controlling the bio-aerosols by inhibiting bacterial and viral survival on the filter, thereby preventing secondary contamination of filter from breeding of bio-aerosols. An air cleaning device equipped with the antimicrobial air filter was tested for the inhibition effect on viruses and no virus was detected at the outlet of the purifier. Although the antimicrobial filters are developed and tested only for the inactivation of virus in this study, the filter could be also effective in removing other types of bio-aerosols, such as bacteria, fungi, and allergens. The antimicrobial filter appears to be promising application in air cleaning and biological protection fields.

scholarly journals INVESTIGATION AND ANALYSIS OF AIR-CLEANING BIOFILTER HYBRID BIOCHARGE QUANTITATIVE AND QUALITATIVE PARAMETERS / ORO VALYMO BIOFILTRO MIŠRIOS ĮKROVOS KIEKYBINIŲ IR KOKYBINIŲ MIKROBIOLOGINIŲ PARAMETRŲ TYRIMAI / ИССЛЕДОВАНИЕ КОЛИЧЕСТВЕННЫХ ИК А ЧЕСТВЕННЫХ МИКРОБИОЛОГИЧЕСКИХ ПАРАМЕТРОВВОЗДУХООЧИСТНОГО БИОФИЛЬТРА ПРИ СМЕШАННОЙ ЗАГРУЗКЕ

2011 ◽  
Vol 19 (1) ◽  
pp. 81-88 ◽  
Author(s):  
Aušra Zigmontienė ◽  
Lukas Žarnauskas
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Saline Solution ◽  
Hydrogen Ions ◽  
Alcohol Group ◽  
Mould Fungus ◽  
Air Cleaning ◽  
Wood Shavings ◽  
Volatile Organic ◽  
Cleaning Device

Investigation of microorganism quantitative and qualitative parameters in the hybrid load of the biofilter allows improving the parameters of one of the most effective and cheapest air cleaning technologies of volatile organic compounds (VOCs)—biofiltration process. The point of biofiltering is the partitioning of volatile organic compounds during the metabolism of microorganisms. In pursuance to assure the best conditions for their growth, the biofilter is loaded with biocharge mixture made of zeolite, foam and wood shavings. The device is filled with VOCs mixture consisting of: acetone of ketone group; butanol of alcohol group and xylene of aromatic carbohydrate group. The optimal temperature of 30 °C is sustained in the air-cleaning device as well as neutral concentration of hydrogen ions (pH 6.9–7.1), biocharge mixture is irrigated with mineral saline solution. The investigation results show that the biofilter is operating most effectively 8 weeks after the end of its activation. The most propitious conditions for growing in the first biofilter cassette is when mould fungus and bacteria cultures have grown, the distribution percentage of which is respectively 5.3% and 94.7% in regard to all grown colonies. The most acceptable for mould is the faction of zeolite granules and activated synthetic foam cubes for bacteria. Santrauka Mikroorganizmų biofiltro mišrios įkrovos kiekybinių ir kokybinių parametrų tyrimai leidžia tikslingiau įvertinti vienos iš efektyviausių ir pigiausių LOJ (lakiųjų organinių junginių) valymo iš oro technologijų – biofiltracijos proceso parametrus. Biofiltracijos proceso esmė – LOJ skaidymas vykstant mikroorganizmų metabolizmui. Siekiant užtikrinti palankiausias sąlygas jiems augti, kaip biofiltro bioįkrova panaudota ceolito, porolono ir medienos drožlių mišinys. Į įrenginį buvo leidžiamas LOJ mišinys, į kurio sudėtį įėjo: ketonų grupei priklausantis acetonas; alkoholių grupei – butanolis ir aromatinių angliavandenilių grupei – ksilenas. Oro valymo įrenginyje buvo palaikoma optimali 30 °C temperatūra, neutralivandenilio jonų koncentracija (pH 6,9–7,1), bioįkrovos mišinys drėkintas mineralinių druskų tirpalu. Tyrimų rezultatairodo, kad biofiltras efektyviausiai veikia praėjus 8 savaitėms nuo jo aktyvinimo. Užaugus pelėsinių grybų ir bakterijų kultūroms (jų procentinis pasiskirstymas įrenginyje yra 5,3 % ir 94,7 % visų užaugusių kolonijų atžvilgiu) nustatyta, kad palankiausios sąlygos augti pirmoje biofiltro kasetėje. Pelėsiams tinkamiausia ceolito granulių frakcija, o bakterijoms – suaktyvinti sintetiniai porolono kubeliai. Резюме Исследование количественных и качественных параметров микроорганизмов при смешанной загрузке биофильтра позволяет совершенствовать параметры одной из самых эффективных и дешевых технологий по очисткевоздуха от летучих органических соединений (ЛОС) – процесса биофильтрации. Суть процесса биофильтрациизаключается в расщеплении ЛОС в процессе метаболизма микроорганизмов. В целях обеспечения самых благоприятных условий для их роста биофильтр загружался биологической смесью из цеолита, поролона и древеснойстружки. В устройство вводилась смесь ЛОС, в состав которой входил ацетон (группа кетонов), бутанол (группа спиртов) и ксилен (группа углеводородов). В воздухоочистном устройстве поддерживалась оптимальная температура (30 oC), нейтральная концентрация ионов водорода (pH 6,9–7,1), биологическая загрузочная смесь смачивалась раствором минеральных солей. Полученные результаты свидетельствовали о том, что наиболее эффективнобиофильтр работает спустя 8 недель после окончания его активизации. После того, как культуры грибков плесении бактерий, процентное распределение которых в устройстве соответственно было равно 5,3% и 94,7% относительно всех выращенных колоний, выросли, наиболее благоприятными для роста оказались условия в первой кассете биофильтра. Для плесени наиболее приемлемой оказалась фракция гранул цеолита, а для бактерий –активизированные кубики синтетического поролона.

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