This study found that the occasions during the day
when malodor were detected can be divided into four
different period, i.e. morning (6 a.m. to 10 a.m.), noon (12
p.m. to 2 p.m.), afternoon (2 p.m. to 4 p.m.), night (8 p.m.
to 10 p.m.) and the whole day. The survey found that the
period when foul odor were frequently detected was at
night (31.1% of respondents) followed by afternoon
(21.6%), noon (11.6%) and morning (7.4%). Interestingly
54 (28.4%) of the respondents claimed the foul smell
were detected throughout the day. Overall 172 (90.5%) of
the respondents strongly opined that foul smell was the
biggest environmental problem that they were facing.
Four main scenarios on the frequency of odor
pollution were assessed. They are once a day, once a
week, once a month and during the whole day. The survey
found out that the smell will eventually disappear but the
rate of disappearance was uncertain and perceived by
41.0% of the respondent as dependent on the general
weather situation with 9.5% thought the direction of the
wind was the main determinant while 3.7% related it to
the heat. In response to the eventual foul smell
disappearance, 15.3% said it happened after more than 6
h followed by 1-2 h (17.4%) and 3-4 h (11.1%).
This study found that the occasions during the daywhen malodor were detected can be divided into fourdifferent period, i.e. morning (6 a.m. to 10 a.m.), noon (12p.m. to 2 p.m.), afternoon (2 p.m. to 4 p.m.), night (8 p.m.to 10 p.m.) and the whole day. The survey found that theperiod when foul odor were frequently detected was atnight (31.1% of respondents) followed by afternoon(21.6%), noon (11.6%) and morning (7.4%). Interestingly54 (28.4%) of the respondents claimed the foul smellwere detected throughout the day. Overall 172 (90.5%) ofthe respondents strongly opined that foul smell was thebiggest environmental problem that they were facing. Four main scenarios on the frequency of odorpollution were assessed. They are once a day, once aweek, once a month and during the whole day. The surveyfound out that the smell will eventually disappear but therate of disappearance was uncertain and perceived by41.0% of the respondent as dependent on the generalweather situation with 9.5% thought the direction of thewind was the main determinant while 3.7% related it tothe heat. In response to the eventual foul smelldisappearance, 15.3% said it happened after more than 6h followed by 1-2 h (17.4%) and 3-4 h (11.1%).
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