In this research, the biodiesel from WCO is used in order to reduce the exhaust emission and to investigate the
community perception regarding to the human health. Biodiesel production is conducted using trans-esterification
process with holding time of 2 hours, temperature of 60 oC and conventional frequency of 20 kHz and then followed
by washing process with holding time of 1 hours, temperature of 50 oC and the frequency of 5 kHz. Biodiesel can
reduce exhaust emission of NOx up to 55%, NO gas up to 57%, increase CO gas up to 25% and increase CO2 gas up
to 43.18% as compared to diesel fuel. In addition, biodiesel is achieve good responds from 35 respondents about the
biodiesel importance.
Indoor Air Quality (IAQ) is a subset of Indoor Environmental Quality (IEQ), where IAQ is about what we
breath. Poor indoor air quality (IAQ) can cause health problems to the residents. Air conditions in the shelter must
be preserved, in order to ensure the safety and health of the residents. Certain indoor plants can filter out toxin found
in the air. Other than that, indoor plants can help clean the air. In this study, seven types of indoor plants that can live
in equatorial climate like Malaysian environment will be selected. At the initial stage, planting of all types of indoor
plants will be done, from sowing seed until all plants grow up. In the next stage, all plants will be tested to determine
their effectiveness to improve indoor air quality. The comparison of data before and after installation of indoor plants
is made. To gain the benefits of indoor plants, detailed study should be done in terms of response and monitoring of
indoor air. The reason of this study is to provide benefits to building occupants. Besides, having the interior plants as
part of decoration items may improve workers’ productivity and reduce stress.
An awareness of possible risk factor in pesticides, by changing attitude towards the correct technique during spraying and
changing behavior can increase safety of workers safety as well as performance. However, there is a limited study and not highlighted
deeply in knowledge, attitude and practices of workers in palm oil plantation issue. Therefore , the objective of this paper is to identify
the relationship between knowledge, attitude and practices of pesticides among the plantation workers. The quantitative method were
used in this paper whereby 132 respondents as pesticide sprayer which represent 90% of the population of palm oil workers in Johor.
The result of spearman correlation indicates that there is significant relationship between knowledge and practices. It shows the
common pattern of high knowledge resulting high practices of the workers during spraying the pesticides at plantation. There is no
relationship between knowledge and attitude and between attitude and practice of the workers at the workplace. This paper shows that
knowledge need to be strengthen in agricultural communities of Johor in order to reduce health problem and sosial issue statistic and
prevent for any future accident. Human exposure to pesticides is an important health and sosial issue as it usually results in serious
health problems such as stroke, epilepsy, respiratory disorders and cancer. Death has been known to occur in some places as a result
of exposures to pesticides. Therefore, more impact knowledge-focused programs need to be arranged and implemented to inculcate
the better awareness of pesticides among palm oil workers, as without knowledge, people may become less careful and therefore are
exposed to pesticide poisoning and other long term exposure illness in the future.
Local Exhaust Ventilation (LEV) is required to absorbed the chemical and at the same time to maintain the air quality. This
study is purposed to create new design of LEV system that believe can remove air contaminants in the chemical store buildings. This
research was conducted using two (2) types of LEV system which are 4 air-inlets LEV (type 1) and 3 air-inlets LEV (type 2). That LEV
has been simulated using ANSYS FLUENT software for their air flow performances. LEV material and the cost of production were
considered parameter for fabricating and effectiveness of LEV system. Results show that air velocity in LEV type 1 was gradually
uniform throughout its ducting network but it increased at the 90º bend section with a maximum air velocity of 31.054 m/s. In the LEV
type 2, the air flow simulations depicted uniformity velocity values of 8.12 m/s, 8.58 m/s and 7.69 m/s at every inlet respectively. The
finding suggests that LEV type 2 was more efficient compared to LEV type 1 due to increasing streamline air velocity.
The indoor air contaminations in the buildings are normally contributed by causes from humans, animals and air
borne fungi. These factors greatly cause the problem of sick building syndrome and indoor air pollutant. This study
was undertaken to discover the potential efficiency of biocide potassium sorbate to remediate the indoor air fungal
especially on wood material. Samples of fungal were collected according to NIOSH Method (NMAM 0800). The total
amount of fungi and bacteria were enumerated at 806 cfu/m3 and 280 cfu/m3, respectively in a lecturer’s room. The
study also revealed that the growth of fungi was at the minimum when incorporated with a biocide treatment according
to ASTM D559000 standard. This biocide has been proven to be effective and able to reduce the growth rate of indoor
fungi. Overall results showed that this type of biocide is effective to overcome the fungal problem on wood material
in the buildings.
This study has been conducted in a new constructed building of NIOSH Malaysia located at Bandar Baru Bangi, Selangor. The goal of the case study is focusing on the level of Indoor Air Contaminants (IAC) including chemical contaminants within three consequent stages which are before furniture install, after furniture install and during one month occupancy. This study was divided the sampling area into two main facilities which are training and office setting. The contaminants has been measured consist of sixparameters such as Carbon Dioxide (CO2), Carbon Monoxide (CO), Total Volatile Organic Compounds (TVOC), Formaldehyde, Respirable Particulates (PM10) and Ozone. The result of Carbon Monoxide (CO), Total Volatile Organic Compound (TVOC), Respirable Particulates (PM10) and Ozone show an increasing trend across the three sampling stages. The Formaldehyde show an increasing trend in the first and second stages but were reduced significantly the last stage of sampling. These finding indicates that furniture and fittings installed might be a potential sources of indoor air contaminants. The management should be aware to their indoor air status to protect the occupant from the risk of unwanted exposure especially during the early stage of building occupancy.