ORCID Profile
0000-0003-0877-1515
Current Organisation
University of Nottingham - Malaysia Campus
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Publisher: Informa UK Limited
Date: 18-08-2009
Publisher: IOP Publishing
Date: 12-2020
DOI: 10.1088/1755-1315/616/1/012060
Abstract: The adoption of the landfill method for chemical sludge management is an issue of concern as landfill leachates can cause negative impacts on the environment. Furthermore, the high moisture content in chemical sludge has resulted in higher disposal costs due to its heavyweight. This research study is conducted to determine the optimum thermal dewatering condition for chemical sludge through experimental testing and thereafter deduce a recommendation to retrofit an existing rotary drum for chemical sludge dewatering. The water removal rate from chemical sludge was evaluated through thermal dewatering experiments using a lab-scale furnace. Referring to results obtained, increased dewatering temperature and dewatering time, and decreased volume of chemical sludge has improved the water removal rate. The highest water removal rate is 82% when 1.0 cm³ chemical sludge s le is dewatered under a temperature of 250ºC for 90.0 min. Based on the economic evaluation between current chemical sludge handling and newly installed rotary drum dewatering methods, an estimate of one hundred and fifty-four thousand Malaysian Ringgit in annual net-saving is expected to be achieved through dewatering of chemical sludge in retrofitted equipment. The finding has justified the feasibility of retrofitting the current rotary drum for chemical sludge dewatering.
Publisher: Springer International Publishing
Date: 29-11-2019
Publisher: Elsevier BV
Date: 08-2021
Publisher: Elsevier BV
Date: 10-2008
Publisher: CRC Press
Date: 29-06-2023
Publisher: Informa UK Limited
Date: 11-09-2008
Publisher: CRC Press
Date: 29-06-2023
Publisher: CRC Press
Date: 29-06-2023
Publisher: MDPI AG
Date: 27-08-2021
Abstract: The management of insect pests and fungal diseases that cause damage to crops has become challenging due to the rise of pesticide and fungicide resistance. The recent developments in studies related to plant-derived essential oil products has led to the discovery of a range of phytochemicals with the potential to combat pesticide and fungicide resistance. This review paper summarizes and interprets the findings of experimental work based on plant-based essential oils in combination with existing pesticidal and fungicidal agents and novel bioactive natural and synthetic molecules against the insect pests and fungi responsible for the damage of crops. The insect mortality rate and fractional inhibitory concentration were used to evaluate the insecticidal and fungicidal activities of essential oil synergists against crop-associated pests. A number of studies have revealed that plant-derived essential oils are capable of enhancing the insect mortality rate and reducing the minimum inhibitory concentration of commercially available pesticides, fungicides and other bioactive molecules. Considering these facts, plant-derived essential oils represent a valuable and novel source of bioactive compounds with potent synergism to modulate crop-associated insect pests and phytopathogenic fungi.
Publisher: CRC Press
Date: 29-06-2023
Publisher: IOP Publishing
Date: 04-2020
DOI: 10.1088/1757-899X/778/1/012129
Abstract: The combined chemical and natural coagulant showed greater fluoride ion removal in synthetic hydrofluoric acid wastewater when compared to natural coagulant or chemical coagulant treatment alone. The impact of applying fibrous thin film on the coagulation activity was assessed in this study. In this study, a new chemical coagulant called Ecogent F-Loc was introduced. It can increase 40% of fluoride removal when combined with sodium aluminate. Combined chemical and natural coagulants gave the highest fluoride reduction using the Moringa Oleifera seed and eggshell with dosage of 100 ppm were 57% and 73%, respectively. When the chemical coagulant added with Moringa Oleifera seed, the fluoride removal efficiency increased from 50% to 77%. This showed that the combined chemical and natural coagulant showed similar coagulation effect as conventional chemical coagulant. In term of fibrous thin film, there is no significant effect on the coagulation activity of coagulant, but it helped to reduce the turbidity and coagulant residue in the synthetic wastewater and used to produce ionic solution for fluoride removal. In addition, the direct contact between particles and the impeller of Jar Test equipment can destroy the surface morphology of coagulant particles. With the support of the fibrous thin film, this challenge can be solved. In conclusion, the combined natural and chemical coagulant solutions can be used to substitute existing chemical treatment in fluoride wastewater treatment.
Publisher: CRC Press
Date: 29-06-2023
No related grants have been discovered for Chien Hwa Chong.