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Leh Cheu Peng

  Leh Cheu Peng
  Ext: 2147 



I completed my PhD study in October 2002 on the Pulp and Paper Technology from Universiti Sains Malaysia. Immediately after that, I was awarded the Japan International Research Center for Agricultural Science (JIRCAS) fellowship and thus I had the opportunity to further pursue my research study on the environmentally friendly pulp bleaching processes in Japan for one year. Since I like to share my knowledge with others and also very enjoy in researching, I joined the School of Industrial Technology, Universiti Sains Malaysia as an academic staff in January 2004. I lecture courses on pulp bleaching, paper recycling, and pulp & paper properties and conduct practical lessons related to pulp and paper science and technology. Besides lecturing, I consider myself to be a well-motivated and enthusiastic individual in carrying research work in pulp and paper production from non-wood biomass especially from oil palm lignocellulosic residues by employing environmentally friendly processes including non-sulphur pulping and non-chlorine bleaching processes. My efforts in research studies have been recognized by being awarded Bronze and Gold medal during national innovation and invention expo in 2002 and 2004 respectively. Besides, I have supervised and graduated more than 10 master or PhD students.

Related SDGs

Leh Cheu Peng



Research interest:

  • Nonwood bioresources for pulp and paper production
  • Environmentally friendly pulping and bleaching development
  • Biomass for bioenergy production
On going grants :
  • The Mechanism of Acidic and Photo Pretreatments and Anthraquinone aided Hydrogen Peroxide Reinforced Oxygen Delignification on improving the bleaching Selectivity of Various Chemical Pulps, Minister of Higher Education Malaysia, RM 85,500, co-researcher: Wan Rosli Wan Daud, Poh Beng Teik, Mazlan Ibrahim, (May 2013- April 2016)
  • Production of Second Generation Bioethanol-Effect of Various Pre-treatments on non-wood Biomass towards Sugar Production, USM RU Grant, RM 161.9K, co-researcher, Lee Keat teong, Wan Nadiah Wan Abdullah, 3 years (Jul 2012 –Jun 2015)
Completed grants :
  • Fundamentals of delignification – Structural changes of residual lignin in various chemical pulps from oil palm empty fruit bunch (EFB) fibre (USM, RU Grant 2009-2011, RM 178,401.00 )
  • Production of high quality pulps and paper by using environmentally compatible chlorine-free bleaching sequences (MOSTI (Malaysia government) Science Fund 2006-2009, RM 207,233.00).
  • The characterization and utilisation of black liquor from oil palm EFB soda pulping and Production of the semichemical pulp from oil palm EFB fibre (Grant from private company).
  • Modification of palm oil fiber pulping process for economically feasible to establish small scale pulp mill complementary to palm oil mill (USM short term).




IWK 103 - Pulp Preparation and Paper Recycle (Part II)
This course is mainly divided into two PART I and PART II. In Part II, it contains TWO major topics - Pulp Bleaching and Paper Recycling. The first topic covers the fundamentals of pulp bleaching chemistry and technology. The principles of bleaching processes for different kind pulps (namely chemical pulps and mechanical pulps) will be discussed in details. The effectiveness of bleaching processes will also be discussed based on the resultant pulps properties measured.
The second topic described the development of recycled paper mill in general. It covers the collection system of waste paper for recycling and the effects of recycling on paper quality.

IWK 205 - Additives and Paper Properties (PART I)
This course consists of 5 chapters which include: 1. Fibre Properties; 2. Structure of Paper; 3. Physical Properties of Paper; 4. Mechanical/Strength Properties of Papaer; 5. Optical Properties of Paper.
Since the paper properties is influenced by it raw material- the fibre properties, thus the understanding on fibre properties is very essential before we go further in paper properties. The structure of paper is also very important and as the basic to us for further understand the factors that actually will affect the final paper properties. The theories and the techniques of paper properties measurement will also be disscussed in this course.


  1. To enhance students understanding towards fibre properties and their effects on paper properties
  2. To study the factors that affect paper physical, mechanical and optical properties
  3. To understanding the theories and teachniques of paper properties measurement




Graduated students


(As main supervisor)

1. KOAY WEE CHING – Graduated in March 2008

Title: Kesan Faktor-Faktor Pemulpaan Ke Atas Sifat-Sifat Pulpa Dan Kertas Semikimia Tandan Buah Kosong Kelapa Sawit.

2. KOAY LEY YEE (MSc.) – Graduated in August 2008

Title: Pembaikan Delignifikasi Oksigen dengan Pra-Rawatan Asidik bagi Pulpa Soda –AQ Gentian Tandan Kosong Kelapa Sawit

3. ANNIE NG SU NIE (MSc.) – Graduated in August 2008

Title: Characterization of Recovered Black Liquor and Isolated Lignin from Oil Palm Empty Fruit Bunch Soda Pulping for Semichemical and Chemical Pulps

4. ANG LIN SUAN Graduated in August 2010

Title: The Study of The Properties of Pulp and Paper Produced From Kenaf

5. MILLY LOO MEI LI (MSc.) – Graduated in March 2011

Title: Effect Of Different Pretreatments and Acetylation Conditions on Cellulose Acetate Synthesized from Recycled Paper Dust

6. NG SOO HUEY (MSc.)- Graduated in March 2011

Title: Improvement in Oxygen Delignification of Oil Palm Empty Fruit Bunches (EFB) Soda-AQ Pulp.

 7. OH SOH WEI (MSc.)- graduated in March 2013

Title: Effects of residual lignin structure and hexenuronic acid on oil palm empty fruit bunch chemical pulps’ delignification.

8. H’ng Yin ying (Msc) – Graduated in April 2014

Title: Comparison Study Between Enzymatic Hydrolysis & Acidolysis Lignins Isolated From Oil Palm Empty Fruit Bunch Pulps

9. Soo Mei Chong (Msc.) – Graduated in April 2014

Title: Production Of Braille Paper from Recycled Fiber Treated With Cellulose Acetate and Optimization by Response Surface Methodology (RSM)

10. TYE YING YING (Ph.D)-Graduated in November 2014

Title: Optimization of various pretreatments in the enzymatic hydrolysis of Kapok, oil palm empty fruit bunch and kenaf core fibres for the production of cellulosic alcohol.

(As co-supervisor)

11. KHO HIAW SAN Graduated in March 2009

Title: Intergration of Design of Experiment Techniques and Interlligent System for Modelling and Prediction)- Graduated in March 2011

12. Nurul Hasanah Kamuludin Graduated in August 2013

Title: Charaterization of alkaline peroxide pulp of oil palm empty fruit bunch and its potential for cellulose acetate production.

13. POOJA SINGHGraduated in November 2014

Title: Biopulping on Oil palm biomass.

Postgraduate Under supervision


(As main supervisor)


Title: Effect of Peroxy Acids Aided Photo Treatment Prior Oxygen Delignification on Various Chemical Pulps’ Peroperties.


Title: Bioethanol Production from Oil palm biomass by Cellulases Sourced From Mutagenically Improved Soil Fungal Isolates 


(As co-supervisor)

3. Junidah Lamiming (Ph.D)

Title: Production of Microcellulose from Oil Palm Biomass.



  1. Yin Hui Chong, Wan Rosli Wan Daud, Beng Teik Poh, Mazlan Ibrahim, and Cheu Peng LehApplication of Photo, Peracetic Acid, and Combination Pre-treatments in Improving Totally Chlorine-Free Bleaching Selectivity. Bioresources 10
  1. Ying Ying Tye, Keat Teong Lee, Wan Nadiah Wan Abdullah, Cheu Peng Leh (2015). Effects of process parameters of various pretreatments on enzymatic hydrolysability of Ceiba pentandra (L.) Gaertn. (Kapok) fibre: A response surface methodology study. Biomass and Bioenergy 75: 301-313.
  2. Ying Ying Tye, Keat Teong Lee, Wan Nadiah Wan Abdullah, Cheu Peng Leh (2014). The Effect of Various Pretreatment Methods on Oil Palm Empty Fruit Bunch (EFB) and Kenaf Core Fibers for Sugar Production. Procedia Environmental Sciences 20:328-335
  1. Ying Ying Tye, Keat Teong Lee, Wan Nadiah Wan Abdullah, Cheu Peng Leh (2013). Potential of Ceiba pentandra (L.) Gaertn. (kapok) fiber as a resource for second generation bioethanol: Parametric optimization and comparative study of various pretreatments prior enzymatic saccharification for sugar production, Bioresource Technology 140:10-14
  1. Yin Hui Chong, Soo Huey Ng and Cheu Peng Leh (2013). Improved oxygen delignification selectivity of oil palm (elaeis guineensis) EFB soda-aq pulp: Effect of photopretreatment and AQ-aided H2O2 reinforcement. Cellulose Chem. Technol., 47 (3-4), 277-283
  1. Singh P.*, Sulaiman, O., Hashim, R., Singh R.P. and C.P.Leh (2013). Evaluating Bio-Pulping as an alternative application on oil palm trunk using white rot fungi. International Biodeterioration & Biodegradation. 82 (2013) 96-103
  1. Chong Y. H., Wan Rosli W. D. and Leh C. P (2013) Effect of Hydrogen Peroxide and Anthraquinone on the Selectivity and Hexenuronic Acid Content of Mixed Tropical Hardwood Kraft Pulp during Oxygen Delignification, Bioresources, 8(2):2547-2557
  1. Cheu-Peng Leh, Ryohei Tanaka, Tsutomu Ikeda, Wan Rosli Wan Daud, Kengo Magara, Shuji Hosoya, Ley-Yee Koay, Soo-Huey Ng (2013). Effect of Various Pre-treatments on Enhancing the Selectivity of Oxygen Delignification upon Chemical Pulps Produced from Tropical Lignocellulosic Resources, JIRCAS Working Report , 80:26-33
  1. Singh P.*, Sulaiman, O., Hashim, R., C.P.Leh and Singh R.P. (2012). Using biomass residues from oil palm industry as a raw material for pulp and paper industry: potential benefits and threat to the environment. Environment, Development and Sustainability 9:1-17.
  1. Soo M. C., W.D. Wan Rosli and C.P.Leh (2012). Improvement of Recycled Paper's Properties for the Production of Braille Paper by Impregnation with Low Grade Cellulose Acetate: Optimization Using Response Surface Methodology (RSM) . Bioresources. 794): 5333-5345.
  1. Tye Y.Y., Lee K.T., W.A. Wan Nadiah and C.P.Leh (2012). Potential of Ceiba pentandra (L.) Gaertn. (kapok fiber) as a resource for second generation bioethanol: Effect of various simple pretreatment methods on sugar production. Bioresource Technology,116: 536-539.
  1. Milly Mei Li Loo, Rokiah Hashim, and Cheu PengLeh, (2012). Recycling of valueless paper dust to a low grade cellulose acetate: Effect of pretreatments on acetylation. Bioresources,7(1), 1068-1083
  1. Chan, H.-T., Fazilah, A., Bhat, R., Leh, C.-P., Karim, A.A. 2012. Effect of deproteinization on degree of oxidation of ozonated starch. Food Hydrocolloids, 26, 339-343.
  1. Ying Ying Tye, Keat Teong Lee, Wan Nadiah Wan Abdullah, Cheu Peng Leh, 2011. Second-generation bioethanol as a sustainable energy source in Malaysia transportation sector: Status, potential and future prospects. Renewable and Sustainable Energy Reviews, 15, 4521-4536.
  1. Chan, H.-T., Leh, C.P., Bhat, R., Senan, C., Williams, P.A., Karim, A.A. 2011. Molecular structure, rheological and thermal characteristics of ozone-oxidized starch. Food Chemistry 126( 3), 10191024.
  1. Soo Huey Ng, Arniza Ghazali and Cheu Peng Leh, 2011. Anthraquinone-aided hydrogen peroxide reinforced oxygen delignification of oil palm (Elaeis guineensis) EFB pulp: A two-level factorial designs. Cellulose Chemistry and Technology. 45(1-2), 77-87
  1. Lin S. Ang, Cheu P. Leh, and Chong C. Lee, 2010. Effects of alkaline pre-impregnation and pulping on malaysia cultivated kenaf (hibiscus cannabinus).       Bioresources, 5(3), 1446-1462.
  1. Pooja Singh, Othman Sulaiman, Rokiah Hashim, P. F. Rupani and Leh Cheu Peng, 2010, Biopulping of lignocellulosic material using different fungal species: A review. Rev Environ Sci Biotechnol, 9, 141-151.
  1. G. Muthuraman, Tjoon Tow Teng, Cheu Peng Leh, I. Norli, 2009. Use of bulk liquid membrane for the removal of chromium (VI) from aqueous acidic solution with tri-n-butyl phosphate as a carrier.Desalination. 248, 884-890.
  1. G. Muthuraman, Tjoon Tow Teng, Cheu Peng Leh, I. Norli (2009), Extraction and recovery of methylene blue from industrial wastewater using benzoic acid as an extractant. Journal of Hazardous Materials, 163, 363-369
  1. Leh C. P., W.D. Wan Rosli, Z. Zainuddin and R. Tanaka, (2008) , Optimisation of Oxygen Delignification in Production of Totally Chlorine Free Cellulose Pulps from Oil Palm Empty Fruit Bunch Fibre, Industrial Crops and Products. 28 260-267
  1. Ryohei Tanaka, Leh Cheu Peng, Wan Rosli Wan Daud (2004). Preparation of Various Types of Pulp From oil Palm Lignocellulosic residues. Journal of Tianjing University of Science & Technology, z2
  1. W.D.Wan Rosli, C.P. Leh, Z. Zainuddin and R. Tanaka, (2004). Effects of Prehydrolysis on the Production of Dissolving Pulp from Empty Fruit Bunches. Journal of Forest Product Technology 16(3): 343-349.
  1. W.D.Wan Rosli, C.P. Leh, Z. Zainuddin and R. Tanaka (2003). Optimisation of Soda Pulping Variables for Preparation of Dissolving Pulps from Oil Palm Fibre. Holzforschung 57(1) 106-114.3.

Community Activities

  • Paper making workshop
  • Paper recycling campaign

Important of Paper Recycling Awareness Workshop at Primary School

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Papermaking workshop during holiday Science Camp @ daycare center.

  Leh QQ1 resized         Leh QQ2 resized

Paper Recycling Awareness Workshop and Pulbic Sharing

Leh SQresized        Leh SQ2 resized


School of Industrial Technology, Building G07, Persiaran Sains, Universiti Sains Malaysia 11800 Pulau Pinang, Malaysia.
Tel: +604 653 2219 | Fax: +604-653 6375 | Email: dean_ind@usm.my

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