Page 44 - BUKU PROGRAM_ iMAACs

International MAAC Symposium 2019
Politeknik Sultan Mizan Zainal Abidin, Terengganu, Malaysia. 25-26 September 2019

[ID PB1011]

Development of Rectifier Education Aid

Wahidah Binti Abd Manap and Tengku Suzi Mas Ayu Binti Tengku Amri 2,b
1,a
1, Jabatan Kejuruteraan Elektrik, Politeknik Sultan Mizan Zainal Abidin, Dungun, Terengganu, Malaysia
E-mail : wida_manap@psmza.edu.my, tengku.suzi@psmza.edu.my,
b
a

Abstract. Rectifier is an electrical device which converts an alternating current into a direct one by
allowing a current to movement through it in one direction only. Half wave, full wave and bridge rectifier
are the circuit using the diode applications. This education aid consists the application as a rectifier for
the DEE20023 Semiconductor Devices's students indulgent. It shows the relation between the
theoretical and practically the rectifier application to the students. The half wave, full wave and bridge
rectifier circuit on the printed circuit board attach straightforwardly to the external interface. It has the
combination of the half wave, full wave and bridge rectifier circuit on the same PCB. It operates either a
type of rectifier or all type of rectifier. The input of rectifier such as the power supply and the output of
rectifier such as the oscilloscope are certainly connecting to this education aid. The portable
characteristics of this learning aids made is more the excessive product. This education aid gives more
understanding to the Semiconductor Devices' students which is difficult to comprehend. This education
aid will assistance the Semiconductor Devices' students develop the best grade compared to the
previous students.

Keywords: Rectifier, half wave, full wave, bridge rectifier.

[ID PB1006]

Potential Use of Moringa Oleifera In Water Turbidity Treatment For Aquaculture

Nuraini Khalil
1,a
1 Jabatan Agroteknologi Dan Bio-Industri, Politeknik Jeli Kelantan
Jalanraya Timur-Barat, 17600 Jeli, Kelantan
Email: nuraini@pjk.edu.my
a

Abstract. Water is a very important physical support in aquaculture. Water turbidity is caused by soil,
mud, organic matter, algae and other microscopic organisms. High water turbidity can cause a variety
of problems including gill injury, lower egg growth rate and fish larvae, reduce food growth and increase
ammonia levels in ponds. This study is conducted to test the effectiveness of using Moringa oleifera
seeds in reducing turbidity of fish cement pond water. 8 samples of cement pond water at Politeknik Jeli
Kelantan were taken with 300ml volume for each sample. Each sample of water was tested with crushed
Moringa oleifera seeds weighing 0.5g, 1g, 1.5g, 2g, 2.5g, 3g, 3.5g, 4g with one control. Using
quantitative methods, water turbidity readings were taken before and after treatment using Colorimeter
LaMotte Smart 3. Based on the results obtained, treatment using 1g of Moringga oleifera seeds resulted
in significant less turbidity than other water samples with 87% reduction in turbidity. The seeds of the
Moringa oleifera have the ability to act as cationic coagulants of natural water in reducing water turbidity.
The active carbon contained in the seed coating and the protein in the Moringa oleifera seeds contribute
to the aggregation process and thus reduce the turbidity of the water sample. Therefore, the use of
Moringa oleifera seend can be considered as one of the alternative methods in the treatment of natural
water turbidity thus reducing the dependence on existing chemicals.

Keywords: Water quality, turbidity, Moringa oleifera

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