Nazerry Rosmady Rahmat
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Preferred name
Nazerry Rosmady Rahmat
Official Name
Nazerry Rosmady, Rahmat
Alternative Name
Rahmat, Nazerry Rosmady
Rahmat, N. R.
Rahmat, Nazzery Rosmady
Main Affiliation
Scopus Author ID
56600476900
Researcher ID
FST-7364-2022

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Synergistic Effect Between Iron and Food/Microorganism (F/M) Ratio in Biological Wastewater Treatment

2022-01-01 , Subramaniam L.S. , Nabilah Aminah Lutpi , Wong Yee Shian , Ong Soon An , Nazerry Rosmady Rahmat , Siripatana C.

Biological wastewater treatment is mainly dependent on the actions of microorganisms that can be used to treat wastewater. Microorganisms will start to stick together when they degrade the organic matter in wastewater for food and flocculate to settle the pollutants. This study aimed to investigate the effect of food to microorganism (F/M) ratio and iron in a biological process using aerobic treatment. For this purpose, four aerobic tanks (A, B, C, D) were set up using activated sludge as the seed sludge, air pump as air diffuser to provide oxygen to the system, and three litres of synthetic medium as carbon source for each tank. A specific amount of iron (II) sulfate was added into tanks B, C, and D with the weight of 3 g, 6 g, and 9 g, respectively. Tank A act as a control, and no iron dosage was added. The F/M ratio for tanks A, B, C, and D were 0.8, 0.5, 0.4, and 0.3 mg BOD/mg MLVSS, respectively. The aerobic tanks were operated for 40 days in sequential batch mode and sampling was collected four times per week to observe the COD and MLVSS. This study has found that Tank D shows the best performance compared to all tanks with 84.71% COD removal efficiency and a fivefold increment of microorganism growth rate. These findings suggest that a relationship exists between the iron and F/M ratio to enhance the aerobic treatment process.

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Ozonation and advanced oxidation process of wastewater containing azo dye

2016 , Nazerry Rosmady Rahmat

Ozonation (O3) and AOP involving O3/H2O2 have been considered as an emerging technology for degradation of dyes in textile and dyestuffs industrial effluent. However, the comparative performance of these processes for dye removal is remains unclear. Therefore, the performance of O3 and O3/H2O2 processes for azo dye removal in industrial effluent was evaluated in this study. The specific objectives of the research are to compare the performance of O3 and O3/H2O2 processes for colour, COD and TOC removal, and to evaluate the effect of initial concentration and initial pH on the performance of O3 and O3/H2O2 processes. The dyes used were Reactive Black 5 (RB5), Remazol Brilliant Blue (RBB), Reactive Green 19 (RG19) and Reactive Red 120 (RR120). The experiments of O3 and O3/H2O2 processes were conducted in a semibatch reactor originated from cylindrical glass reactor. The result shows that the colour removal of RB5, RBB, RG19 and RR120 in O3/H2O2 treatment was slightly higher than O3 treatment for ozonation time less than 5 minutes and the comparison value approximately only 0.5 %. Moreover, complete colour removal was achieved for ozonation time more than 5 minutes in both processes. The significant removal efficiency of both O3 and O3/H2O2 processes showed that both processes are efficient for colour removal of reactive dyes.

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Electro-oxidation as Tertiary Treatment Techniques for Removal of Palm Oil Mill Effluent

2020-07-09 , Che Zulzikrami Azner Abidin , Fahmi Muhammad Ridwan , Abdul Haqi Ibrahim , Nazerry Rosmady Rahmat , Farah Mohamed Hussein N. , Razi Ahmad

The production of palm oil, though, results in the generation of huge quantities of polluted wastewater normally referred as palm oil mill effluent (POME). It gives adverse impacts to the environment, particularly if it is not properly treated. POME are known to have various types of liquids, residual oil and suspended solid as it has very high strength waste in its untreated form. Although conventional biological processes are normally efficient for the degradation of pollutants occurring in wastewater, most of these compounds are not effectively removed. As a result, further treatment is needed to meet more stringent discharge standards of Department of Environment (DOE), Malaysia. This research focused on treatment of POME by using electro-oxidation process (EO). It was done to identify the performance of EO process for colour, chemical oxygen demand (COD), suspended solids (SS), and Ammoniacal-nitrogen NH3-N) removal as well as the relative effects of different operational parameters such as pH, type of electrodes and contact time. The pH was varied between 3 and 11, using Ferum (Fe) and Aluminium (Al) electrode, and contact time from 0 to 120 min. The most suitable pH, contact time and type of electrode were pH 3, 120 min and Aluminium electrode, respectively. Therefore, EO process at specified level can be used as an efficient and effective post-treatment technology to meet the standard regulatory requirements.

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Removal of palm oil mill effluent by using electro-oxidation process

2020-06-10 , Che Zulzikrami Azner Abidin , Sabri S.N. , Fahmi Muhammad Ridwan , Bashir Mohammed J.K. , Abdul Haqi Ibrahim , Nazerry Rosmady Rahmat , Mohamed Hussein N.F. , Mahiran N.Q.

Wastewater includes the Palm Oil Mill Effluent (POME) that gives adverse impacts to the environment especially for water pollution when it is not treated properly. POME are known to have various types of liquids, residual oil and suspended solid as it has very high strength waste in its untreated form. Although conventional biological processes are normally efficient for the degradation of pollutants occurring in wastewater, most of these compounds are not effectively removed. As a result, further treatment is needed to meet more stringent discharge standards of Department of Environment (DOE). This research focused on treatment of POME by using electro-oxidation process (EO). It was done to identify the performance of EO process for colour, chemical oxygen demand (COD), suspended solids (SS), ammoniacal-nitrogen (NH3-N), and turbidity removal as well as the relative effects of different operational parameters such as pH, type of electrodes and contact time. The pH was varied from 3 to 11, the electrodes were aluminium and iron and the contact time was from 0 to 120 min. The most suitable pH, contact time and type of electrode were pH 3, 120 min and Al electrode.

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