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Articles by S.R.S. Abdullah
Total Records ( 4 ) for S.R.S. Abdullah
  H.A. Hasan , S.R.S. Abdullah , N.T. Kofli and S.K. Kamaruddin
  Water is an important nutrition for living thing, such as humans, animals and plants. Nowdays, it has been polluted with inorganic contaminants which are discharged from industries. Manganese is one of the inorganics contaminant that causes low hemoglobin level, neurotoxicity, pipes clogging and bad taste if the concentrations in water exceed the regulated limit. A biological treatment process was investigated to treat the manganese through the biosorption mechanism by using Biological Aerated Filter (BAF) system. The microbes were taken from sewage activated sludge and isolated in agar media and identified by using Biolog Microstation System. These microbes included both Gram positive and Gram negative groups and the morphology were rod shape (Bacillus). The screening test has been done to select the highest manganese uptake by these strains and further studies under laboratory condition as a function of pH, biosorbent dosages and manganese toxicities were investigated comparison with biosorbent of sewage activated sludge. The biosorption isotherms were fitted with Langmuir to represent the equilibrium of the maximum manganese uptake by bacteria. The screening resulted that HAH1 has a higher manganese uptake capacity than others strain with 13.31 mg Mn2+/g biomass at pH 6 and biomass dosage of 0.1 g. The further studies resulted, manganese biosorption increased with rise in pH, biosorbent dosages and manganese toxicities. The Langmuir isotherm model revealed HAH1 was a better biosorbent of manganese than sewage activated sludge with the maximum biosorption capacity (qmax) of 55.56 mg Mn2+/g biomass and Kd value of 133.44.
  M.H. Muhamad , S.R.S. Abdullah , A.B. Mohamad , R.A. Rahman and A.A.H. Khadum
  Wastewater originating from recycled paper industry is known to be potentially toxic/inhibitory. Adsorbable Organic Halides (AOX) are among the toxic constituents generated from the recycled paper industry. The problems associated with AOX in the environment are their accumulation in the food chain and their persistence in nature. Hence, it is imperative to improve the effluent quality emanating from the recycled paper industry in order to meet the future discharge limits. One the plausible treatment technique is the use of the Sequencing Batch Biofilm Reactor (SBBR) with an option for Granular Activated Carbon (GAC) dosing. Pilot scale reactor based on combined physical-biological treatment of this GAC-SBBR system has been fabricated and evaluated for performance in the treatment of effluent from a recycled paper mill. The pilot GAC-SBBR was constructed in Muda Recycled Paper Mill located in Kajang, Selangor. It comprises of a High-density Polyethylene (HDPE) biofilm reactor with a diameter of 1.2 m, maximum water depth of 1.8 m and packed with 200 g L-1 of 2-3 mm granular activated carbon (coconut shells). The entire plant set-up was successfully commissioned. As a first step in the design procedure, a pilot test was run for a period of 2 months which include biomass acclimatization process for 1 month. Preliminary results showed that the GAC-SBBR could be an appropriate technology for the treatment of the wastewater. Based on reactor operation, the removal efficiencies of Pentachlorophenol (PCP) from the treated effluent was in the range between 82-100%, while the COD removal efficiency was between 39-81%. The initial results of pilot scale showed that the biofilm attached onto granular activated carbon can substantially remove the PCP recalcitrant in the wastewater. This research uses PCP as a model for AOX compound to study the adsorption and biodegradation of PCP in pilot plant biofilm reactor system.
  M.S. Takriff , N.L. Jaafar and S.R.S. Abdullah
  The palm oil industry is a vital economic backbone of Malaysia since it is one of the world’s largest producer and exporter of palm oil despite creating enormous environmental problems, one being the huge generation of Palm Oil Mill Effluent (POME) during the oil extraction process. This highly polluting wastewater contains high concentrations of Biological Oxygen Demand (BOD) and Chemical Oxygen Demand (COD). Due to the high organic content of POME, biological treatment method seems to be a preferable solution. Therefore, a series of treatment comprising of fermentation, algae, biofilm and membrane system is proposed as one of the possible option to treat POME. This paper also reviews few configurations and modes of operation of several biofilm treatment systems as well as focusing on the application of a Fluidized Bed Biofilm Reactor (FBBR) in treating POME further down the proposed treatment chain.
  A.F. Almansoory , M. Idris , S.R.S. Abdullah and N. Anuar
  In this study both plants Ludwigia ectovolvis and Scirpus mucronatus have been shown to phytoremediate by toxicity testing using various concentrations of gasoline. Plants grow in different ratios comprising of garden soil and sand before executing the toxicity tests. Soil mixture as garden soil to sand ratios (25:75, 50: 50, 75:25, 100% sand and 100% garden soil) to propagation the plants for 56 days. The results shown that L. ectovolvis could grow and survive in mixture of garden soil to sand ratio of 50:50, while for S. mucronatus the best favorable growth was using 75: 25 ratio of garden soil to sand. S. mucronatus survived the gasoline concentrations of 10, 20, 30, 40, 50, 60, 70, 90 and 100 g gasoline/kg in comparison to the control. However L. ectovolvis died after one day of exposure at similar concentrations, therefore the plants were tested for lower concentrations of 1, 2, 3, 5 and 7 g kg-1. During 14 days of exposure, S. mucronatus can only survive at concentrations of 10, 20, 30 and 40 g gasoline/kg. But L. ectovolvis withered under concentration of 1, 2, 3, 5 g gasoline/kg at the end of exposure period. As a conclusion, S. mucronatus has the potential to remediate hydrocarbon contaminated soil as compared to L. aectovolvis.
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