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Illness, referred to as BRI are two types of indoor environment on the health
effects. Whether it is Sick Building Syndrome or Building Related Illness, we can
improve indoor air quality by improving the living environment, thereby reducing
the incidence of these symptoms.
Only take reasonable measures to develop science-based prevention programs
and countermeasures on the basis of the sources of pollutants can we ensure good
indoor air quality. Enhancing interior ventilation to ensure the ventilation and fresh
air in a certain period of time is the most important measures [7]. Of course indoor
air quality assessment must have the appropriate standards, and the implementa-
tion of our ‘‘indoor air quality standards’’ have been since March 1, 2003, which is
the basis of the indoor air quality evaluation. With the development of science andtechnology and the emergence of new research, we must revise the existing
standards and supplement in order to meet the current requirements. Biological
pollution is one of the main types of indoor air pollution, mainly referring to the
pollution caused by bacteria, viruses, mold, dust mites, pollen, spores, and cock-
roaches. The quality of biological pollution levels for indoor air quality is more
important evaluation index, and the attention in this regard is not enough.
This article selects the number of bacteria and composition of the important
indicators of indoor pollution as the object of comparative study of air quality of
naturally ventilated rooms and air-conditioned rooms in hotels.
52.3 Research Methods and Findings
52.3.1 The Objects of Study
Select Xingjia Hotel in Wuxing as the study sites, 5 air-conditioning rooms and
5 tural ventilation rooms, and their areas are 25 m2
(5 * 5 m), volume is 72.5 m3
;
their internal facilities are basically the same.
52.3.2 Research Methods
In each room, select the appropriate test points, and the detection point is set based
on room construction area in the middle between 0.9 and 1.3 m. Total number of
bacteria is determined in accordance with the commonly used methods of bacterial
detection, by the use of ordinary plate storm drain sedimentation method and the
prepared ordinary agar medium was placed in the detection point, storm drain
4–5 min, then in accordance with the requirements, finish the research and bring it
back to calculate the total number of bacteria in the laboratory, and cultured for
48 h at 37 C.
In per cubic meter, the total number of bacteria is N
3:14r2 100 5
t
100
3 ; N is Petri
dish of bacteria landing number; 3.14 r
2
is plate area, t is the exposure time
(minutes). In two detections, one is detection when cleaning, and another is
detection after cleaning.
52.3.3 The Detection Time
Noted the time of the hotel guests to get up, to ensure that does not affect the
guests to rest and to get true test data, which is scheduled in the time between 8:00
and 10:00 am.52.3.4 The Test Results
Detect when the temperature and humidity inside the hotel room was measured
according to the detection and calculation the total number of bacteria of natural
ventilation and air conditioning room at different times, which are shown in
Tables 52.1 and 52.2.
52.4 Results Analysis
52.4.1 Preliminary Analysis
According to test results it is clear that bacteria of the air-conditioned room
number are higher than naturally ventilated rooms. Figures 52.1 and 52.2 are
excessive bacteria control curves in air-conditioned and natural ventilation rooms
before and after cleaning.
After analysis, the bacteria number in the room will change as time changes,
whether it is air-conditioned room or naturally ventilated rooms, and the excessive