Megat Johari Megat Mohd Noor

Coagulation activity of spray dried salt extracted Moringa oleifera

Abstract A study on the effectiveness of salt extracted Moringa oleifera seeds as a coagulant for turbidity removal in water treatment process under different operational parameters (configurations) of spray drying, storage, and packaging conditions is presented. The operational parameters were inlet temperature, outlet temperature, and pumping rates. The coagulation activity was studied for the spray dried salt extracted M. oleifera which is stored under two different conditions, room temperature (29°C) and refrigerator (3°C), and two different packaging forms, closed container and vacuum packed. Eight configurations for operational parameters were used in this study. The results show that for inlet temperature below 115°C the spray drying process failed to produce dry powder. For the successful configurations, there was no significant difference in coagulation activity between different configurations stored at the same storage and packaging conditions. However, the comparison of the coagulation activit...

Effect of the packaging and storage conditions on the coagulation activity of spray-dried salt-extracted Moringa oleifera

Abstract Moringa oleifera is one of the natural coagulants considered as an alternative to synthetic coagulants. Several studies were carried out on the usage and extraction of this natural coagulant. In this study, the coagulation activity of spray-dried salt-extracted M. oleifera seeds powder was investigated under different storage conditions, packaging forms and storage duration. The spray-dried salt-extracted M. oleifera seeds powder was stored at room temperature (29°C) and refrigerator temperature (3°C); under different packaging forms; closed container and vacuum packed stored for 6u2009weeks. Optimization of spray-dried salt-extracted M. oleifera shows that the optimal dosage is half of the nonspray-dried salt-extracted M. oleifera. The results of residual turbidity of different packaging and storage conditions of salt-extracted M. oleifera show that there was no significant difference between them. The coagualtion activity decreased insiginficantly with the increase of storage duration during the study.

Application of salt extracted peanut seeds in the pretreatment of palm oil mill effluent (POME)

AbstractThis paper presents a study on the effectiveness of salt extracted peanut seeds after oil extraction as a novel coagulant for turbidity, total suspended solids (TSS) and chemical oxygen demand (COD) removal in palm oil mill effluent (POME) pretreatment process. The coagulation activity was investigated for the peanuts seeds after its oil extraction. The active coagulation component was extracted using three different concentrations of sodium chloride (NaCl), namely 0, 1 and 2u2009mol/l. The initial turbidity, TSS and COD of POME were found to be 11,684 NTU, 22,784 and 63,955u2009mg/l, respectively. The results show that extraction of coagulation active component from peanut seeds using NaCl improved the removal efficiency of the tested constituents. Accordingly, the higher NaCl concentration resulted in a low optimum dosage of peanut seeds and higher removal of turbidity, TSS and COD. Peanut seeds extracted with 2u2009mol/l reduced TSS to 1,218u2009mg/l (94.7% removal). On the other hand, peanut seeds extracted w...

Dual polyelectrolytes incorporating Moringa oleifera in the dewatering of sewage sludge

AbstractOne of the main costly problems at wastewater treatment plants is the treatment of sludge, which is responsible for about 50% of the total operating cost of the whole treatment system. Chemical conditioning of sludge before dewatering is often necessary to increase the process efficiency of dewatering devices. Moringa oleifera seeds were evaluated as an alternative natural conditioning material during dewatering; as a single conditioner and as a base conditioner in dual polyelectrolytes conditioning (using Zetag 8140) for sewage sludge dewatering. The sewage sludge used in the experiments was collected from a sludge holding tank of the treatment plant located in Taman Shamelin Perkasa, Kuala Lumpur, while the M. oleifera seeds were collected from Serdang, Selangor, and stored in a room temperature for not more than 3u2009d, and then the quality seeds were identified and used. The preparation of the stock solution will start with placing the seeds in the oven for 24u2009h at 50°C. After drying, the seeds w...