Study Shows That Electronic Air-Cleaning Technology Can Generate Unintended Pollutants

2021 ◽  
Vol 51 (16) ◽  
pp. 121-123
Keyword(s):  
Air Cleaning ◽  
Cleaning Technology

Airborne pathogenic microorganisms and air cleaning technology development: A review

2021 ◽  
pp. 127429
Author(s):  
Lu Song ◽  
Jianfeng Zhou ◽  
Can Wang ◽  
Ge Meng ◽  
Yunfei Li ◽  
...  
Keyword(s):  
Technology Development ◽  
Pathogenic Microorganisms ◽  
Air Cleaning ◽  
Cleaning Technology

scholarly journals Electrostatic Precipitators as an Indoor Air Cleaner—A Literature Review

2020 ◽  
Vol 12 (21) ◽  
pp. 8774
Author(s):  
Alireza Afshari ◽  
Lars Ekberg ◽  
Luboš Forejt ◽  
Jinhan Mo ◽  
Siamak Rahimi ◽  
...  
Keyword(s):  
Indoor Air ◽  
Indoor Environment ◽  
Indoor Environmental Quality ◽  
Air Filtration ◽  
Pressure Drops ◽  
Air Cleaning ◽  
Air Cleaner ◽  
Air Cleaners ◽  
Electrostatic Precipitators ◽  
Cleaning Technology

Many people spend most of their time in an indoor environment. A positive relationship exists between indoor environmental quality and the health, wellbeing, and productivity of occupants in buildings. The indoor environment is affected by pollutants, such as gases and particles. Pollutants can be removed from the indoor environment in various ways. Air-cleaning devices are commonly marketed as benefiting the removal of air pollutants and, consequently, improving indoor air quality. Depending on the type of cleaning technology, air cleaners may generate undesired and toxic byproducts. Different air filtration technologies, such as electrostatic precipitators (ESPs) have been introduced to the market. The ESP has been used in buildings because it can remove particles while only causing low pressure drops. Moreover, ESPs can be either in-duct or standalone units. This review aims to provide an overview of ESP use, methods for testing this product, the performance of existing ESPs concerning removing pollutants and their byproducts, and the existing market for ESPs.

scholarly journals EFFECT OF MULTILEVEL AIR CLEANING FOR PATIENTS WITH SEASONAL ALLERGIC RHINITIS AND ASTHMA

2012 ◽  
Vol 9 (5) ◽  
pp. 60-68
Author(s):  
A V Averyanov ◽  
O G Elisyutma ◽  
E S Fedenko ◽  
S I Sokurenko ◽  
T V Borisova ◽  
...  
Keyword(s):  
Allergic Rhinitis ◽  
Lung Function ◽  
Clinical Improvement ◽  
Seasonal Allergic Rhinitis ◽  
Pollen Grains ◽  
Controlled Study ◽  
Comprehensive Treatment ◽  
Air Cleaning ◽  
Air Space ◽  
Cleaning Technology

A randomized placebo-controlled study to evaluate the effectiveness of the air cleaning technology with device IQAir HealthPro Series Model 250 (Switzerland) for comprehensive treatment of patients with seasonal allergic rhinitis and bronchial asthma was carried out. The significant reduction in the number of pollen grains in the air space and the clinical improvement was demonstrated, but no effect on lung function, blood and nasal mucus eosinophilia was revealed.

scholarly journals Analysis of Air Purification Methods in Operating Rooms of Chinese Hospitals

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Bingli Zhang ◽  
Liuyi Li ◽  
Xi Yao ◽  
Yuxiu Gong ◽  
Yu Zhang ◽  
...  
Keyword(s):  
Operating Rooms ◽  
Air Purification ◽  
Eastern Region ◽  
Urgent Problem ◽  
General Hospitals ◽  
Air Cleaning ◽  
Tertiary Hospitals ◽  
Grade Ii ◽  
Purification Methods ◽  
Cleaning Technology

This research demonstrates the current use of air purification methods in the operating rooms (ORs) in China. 154 hospitals from 6 provinces were included in this survey to reflect the air purification methods of ORs in 2017. Air cleaning technology (ACT) is used in 124 (80.52%) hospitals. We find that the rates of using grade I, III, or IV clean operating room (COR) in tertiary hospitals are all higher than in lower level hospitals; the rate of using ACT in the ORs is higher, too. In addition, general hospitals have higher rate in using ACT in the ORs than specialized hospitals. The highest rate of using ACT in the ORs is in the eastern region of China. The number of hospitals using ACT, ultraviolet light disinfection, and air sterilizers (such as circulating air UV sterilizer) increased yearly. All grades of CORs can be maintained as required by more than 90% hospitals except grade II COR. In this research, we found air purification methods, especially the ACT, are widely used in hospitals’ ORs. However, finding the way to select and use different air purification methods correctly is an urgent problem to be solved next.

scholarly journals REMOVAL OF SO2 FROM CONTAMINATED AIR USING A PEAT BIOFILTER / SO2 ŠALINIMAS IŠ UŽTERŠTO ORO NAUDOJANT BIOFILTRĄ SU DURPIŲ ĮKROVA

2013 ◽  
Vol 5 (4) ◽  
pp. 382-387
Author(s):  
Kristina Skemundrytė ◽  
Rasa Vaiškūnaitė
Keyword(s):  
Sulfur Dioxide ◽  
Flow Rate ◽  
Air Flow ◽  
Ambient Air ◽  
Sulfur Compounds ◽  
Air Flow Rate ◽  
Cleaning Efficiency ◽  
Air Cleaning ◽  
Peat Biofilter ◽  
Cleaning Technology

About 64 thousand tons of contaminated air is annually released into ambient air. More than 30% of such pollution includes toxic sulfur compounds. The article discusses the properties of biofiltration - biological air cleaning technology. Research was performed using a biofilter produced in the laboratory at Vilnius Gediminas Technical University. During testing, ambient air contaminated with sulfur dioxide was pulled through biomedia with a division of Thiobacillus microorganisms, and calculations of cleaning efficiency were performed. Besides, the efficiency of the charged peat biofilter (changing technical characteristics of the air flow rate, number of layers and value of pollutant concentration), depending on the nature of the investigated sulfur compounds and their concentrations, was determined. The biofilter improves the efficiency of air cleaning when the air flow rate reduces from 0,1 to 0,02 m/s (e.g. when sulfur dioxide is used for treating the air flow rate under the initial concentration C = 15 mg/m³, the efficiency of the filter is equal to E = 96,3%). Santrauka Didžiausia šiais laikais išsivysčiusių ir besivystančių šalių problema yra greitai besiplečiančių pramonės ir energetikos sektorių į aplinkos orą išmetami cheminiai junginiai (apie 64 tūkst. tonų per metus), iš kurių apie 30 % – žmogui nuodingi ir aplinkai neigiamą poveikį darantys sieros junginiai. Trumpai aptariama biologinio oro valymo privalumai, pagrindinės pasirinktõs durpių bioįkrovos charakteristikos, pateikiama taikyta metodika bei sieros dioksido valymo iš oro eksperimentų rezultatai, aprašomas biofiltracijos procesas. Biofiltro oro valymo efektyvumas didėja mažinant valomo oro srauto greitį nuo 0,1 iki 0,02 m/s (valant sieros dioksidu užterštą orą, kai pradinė teršalo koncentracija C = 15 mg/m³), filtro efektyvumas yra E = 96,3 %.

Decontamination of Ventilation Systems Using Photocatalytic Air Cleaning Technology

2003 ◽  
Vol 125 (3) ◽  
pp. 359-365 ◽  
Author(s):  
D. Yogi Goswami
Keyword(s):  
Fiber Optics ◽  
Indoor Air ◽  
Photocatalytic Oxidation ◽  
Indoor Air Pollution ◽  
Theoretical Background ◽  
Air Contamination ◽  
Air Cleaning ◽  
Volatile Organic Chemicals ◽  
Uv Photons ◽  
Cleaning Technology

Indoor air pollution is caused by particulate matter and chemical and microbial contamination. Conventional technologies, including filteration, do not adequately provide complete answers to these problems. Photocatalytic oxidation combined with filteration provides one of the most viable solutions to the problem of indoor air contamination by microorganisms and volatile organic chemicals (VOCs). It can also provide a defense against bioterrorism. This paper describes the theoretical background of the technology and results of its effectiveness against VOCs, bacteria, spores, and dust mite allergens. Although the technology uses UV photons from blacklight, it can be designed to use sunlight with the help of fiber optics.

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