Air Kelantan Sdn. Bhd.

Kota Bharu, Malaysia

Air Kelantan Sdn. Bhd.

Kota Bharu, Malaysia
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Chew C.M.,University of Malaya | Aroua M.K.,University of Malaya | Hussain M.A.,University of Malaya | Ismail W.M.Z.W.,Air Kelantan Sdn. Bhd.
Journal of the Taiwan Institute of Chemical Engineers | Year: 2015

Common design and operational issues to evaluate the performance of an ultrafiltration (UF) membrane water treatment plant are highlighted with a case study on an industrial-scale drinking water treatment plant located in Malaysia. This treatment plant has been in operation since February 2013 using dead-end polyethersulfone UF membrane filtration system to produce up to 14 million litres a day of drinking water to a small township. Literature solutions are compared with the practised solutions and elucidated with the case study. Gaps between literature solutions which are mainly based on lab-scale research and industry practices are identified. Reducing this gap will have vast implication to improve the design and operation of industrial-scale UF treatment system. © 2014 Taiwan Institute of Chemical Engineers.


Chew C.M.,University of Malaya | Aroua M.K.,University of Malaya | Hussain M.A.,University of Malaya | Ismail W.M.Z.W.,Air Kelantan Sdn. Bhd.
Journal of Cleaner Production | Year: 2016

Sustainable developments in water treatment systems are challenges in the 21st century. More industrial-scale drinking water treatment plants are using ultrafiltration (UF) membrane systems. Conventional media filtration is the mainstream treatment process for these plants especially in developing countries. Evaluations of both industrial-scale UF and conventional drinking water treatment systems have been carried out in this study. These treatment systems are evaluated based on 5 aspects which are capital expenditure, operational expenditure, maintenance cost, treated water quality and water losses. A case study water treatment plant in Malaysia which encompassed both the UF and conventional media filtration systems are used to elucidate this comparison study. River water source is fed as surface raw water to both systems. The UF system has exhibited consistent filtrate quality regardless of the fluctuation of raw water quality. Sludge discharged from the UF backwash remains the same characteristics as the feed water except with higher concentration of solids content. However, sludge from the conventional system contains high concentration of Aluminium residual originating from the coagulant. The UF system caused higher water losses compared to the conventional system. As for operation and maintenance expenditures, the conventional systems are more economical. Sensitivity analyses have been carried out on the capital expenditure and operational expenditure. Precaution measures have been taken to ensure all data collected are relevant and accurate. More than 12 months of treatment systems operational data are collected, compiled and analysed to substantiate the results. This study intends to highlight the commercial and environmental sustainability of both systems. The major contribution and novelty of this work is that it provides useful reference to the decision makers and stakeholders on the selection of treatment process for industrial-scale drinking water facilities to accommodate their current and future requirements. © 2015 Elsevier Ltd. All rights reserved.


Ismail W.M.Z.W.,Air Kelantan Sdn. Bhd. | Yusoff I.,University of Malaya | Rahim B.-E.E.A.,University of Malaya
Environmental Earth Sciences | Year: 2013

A proposed horizontal well or radial collector well installation in shallow aquifers to enhance water withdrawal rates in Pintu Geng well field in Kelantan, Malaysia was simulated using the Drainage Package of MODFLOW groundwater model. The modelling exercise aimed at identifying an optimum pumping rate that would safely achieve the desired drawdown of less than 2 m in an area of 300 m radius surrounding the Pintu Geng horizontal collector well. The model also would serve as a basis for the design of the horizontal well components. High degree of grid refinement for the well location is needed to simulate the real field installation. However, for the purpose of designing water withdrawal systems, it is important to obtain the correct production rate of these wells for a given drawdown. A transient groundwater flow model was calibrated and validated with few assumptions of the horizontal well hydraulic properties. The model demonstrates that under natural flow condition at -3 m depth, the six collectors (drains) tap a volume of 19,200-43,700 m3/day. A steady-state model was also developed to predict the capture zone delineation. Attention is also given to the impact of the well installation to the surrounding 300 m radius by inspecting the degree of the drawdown. © 2012 Springer-Verlag.


Chew C.M.,Techkem Water Sdn. Bhd | David Ng K.M.,Techkem Water Sdn. Bhd | Richard Ooi H.H.,Techkem Water Sdn. Bhd | Ismail W.M.Z.W.,Air Kelantan Sdn. Bhd
Water Practice and Technology | Year: 2015

This paper presents a case study of Wakaf Bunut water treatment plant (the ‘plant’) in Kelantan, Malaysia. The plant was successfully commissioned in February 2013 and started operating in March 2013. It is capable of sup-plying up to 14 million liters a day of potable water to Tok Bali. Feasibility studies were carried out on the combination of river bank filtration (RBF) and ultrafiltration (UF) to reduce operating costs while maintaining fil-trate quality. The plant is the largest municipal drinking water treatment plant in Malaysia using combined RBF and UF technologies. Actual operating data from the plant were collected and are discussed in this paper. © IWA Publishing 2015.

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