Muhammad Masud Aslam - Academia.edu (original) (raw)

Books by Muhammad Masud Aslam

Research paper thumbnail of Refinery Wastewater Treatment Using Constructed Wetlands

Papers by Muhammad Masud Aslam

Research paper thumbnail of Textile Wastewater Characterization and Reduction of Its Cod & Bod by Oxidation

The main goal of this study was characterization and the COD & BOD reduction of the textile indus... more The main goal of this study was characterization and the COD & BOD reduction of the textile industry processing wastewater. Field analysis has been carried out for the characterization of effluent from textile industry for the evaluation of treatment options. Analysis of four-textile industries effluent was carried out. For COD & BOD reduction three oxidizers were used to compare their treatment efficiency. Using three different oxidants namely Hydrogen peroxide, Sodium Hypochlorite, Calcium hypochlorite, Potassium dichromate and Calcium dichromate at temperatures 25oC, 50oC and 100oC oxidation of high COD textile industry processing wastewater was done. It was found that of these three oxidants calcium hypochlorite proved a suitable oxidant as it reduced COD up to 69% and maximum COD removal occurred at 100oC and at retention time of 1440min. Complete reduction of COD could not be achieved despite varying experimental conditions, i.e. temperature and oxidation duration. Investigations of wastewater after treatment showed a remarkable increase in susceptibility to COD reduction.

Research paper thumbnail of Treatment performances of compost-based and gravel-based vertical flow wetlands operated identically for refinery wastewater treatment in Pakistan

Ecological Engineering, 2007

Refinery wastewater treatment COD removal Gravel Compost a b s t r a c t This paper describes a c... more Refinery wastewater treatment COD removal Gravel Compost a b s t r a c t This paper describes a constructed wetland treatment system designed to treat wastewater from oil refinery. In 2003, to promote the practical development of constructed wetlands (CWs) used for industrial wastewater treatment in Pakistan, a series of investigations was conducted to evaluate the feasibility of using constructed treatment wetlands to remove pollutants from refinery wastewater. The main objective of the research was to quantify the effect of different filter media on the treatment performance of vertical flow wetlands in the prevailing climate of Pakistan. Wastewater produced from the oil refinery contains high concentrations of organic and inorganic pollutants; therefore it cannot be discharged directly into river without any treatment. Phragmites karka were planted in both containers as a vertical flow wetland to evaluate their efficiencies in the purification of wastewater and their growth in wetlands fed with oil refinery wastewater. The results from a 1-year treatment showed that the purifying efficiency of constructed wetlands for oil-refined wastewater was low at the beginning but it improved gradually with the growth of plants and biofilm. Thus, a gravel-filled wetland and organic compost filled wetland were operated identically with primarily treated refinery wastewater at a hydraulic loading rate of 0.100 m d −1 , intermittently. According to the results, the removal efficiencies for the compost and gravel wetland cells varied as follows during the experimental period of 1 year: total suspended solids (TSS) (51-73% and 39-56%), chemical oxygen demand (COD) (45-78% and 33-61%), biological oxygen demand (BOD) (35-83% and 35-69%) and significant removal of heavy metals, i.e. Fe 2+ , Cu 2+ and Zn 2+ , was observed. The treatment performances of the compost-filled wetland were better than that of the gravel-filled wetland in terms of removal of COD and BOD.

Research paper thumbnail of Textile Wastewater Characterization and Reduction of Its Cod & Bod by Oxidation

The main goal of this study was characterization and the COD & BOD reduction of the textile indus... more The main goal of this study was characterization and the COD & BOD reduction of the textile industry processing wastewater. Field analysis has been carried out for the characterization of effluent from textile industry for the evaluation of treatment options. Analysis of four-textile industries effluent was carried out. For COD & BOD reduction three oxidizers were used to compare their treatment efficiency. Using three different oxidants namely Hydrogen peroxide, Sodium Hypochlorite, Calcium hypochlorite, Potassium dichromate and Calcium dichromate at temperatures 25oC, 50oC and 100oC oxidation of high COD textile industry processing wastewater was done. It was found that of these three oxidants calcium hypochlorite proved a suitable oxidant as it reduced COD up to 69% and maximum COD removal occurred at 100oC and at retention time of 1440min. Complete reduction of COD could not be achieved despite varying experimental conditions, i.e. temperature and oxidation duration. Investigations of wastewater after treatment showed a remarkable increase in susceptibility to COD reduction.

Research paper thumbnail of Treatment performances of compost-based and gravel-based vertical flow wetlands operated identically for refinery wastewater treatment in Pakistan

Ecological Engineering, 2007

Refinery wastewater treatment COD removal Gravel Compost a b s t r a c t This paper describes a c... more Refinery wastewater treatment COD removal Gravel Compost a b s t r a c t This paper describes a constructed wetland treatment system designed to treat wastewater from oil refinery. In 2003, to promote the practical development of constructed wetlands (CWs) used for industrial wastewater treatment in Pakistan, a series of investigations was conducted to evaluate the feasibility of using constructed treatment wetlands to remove pollutants from refinery wastewater. The main objective of the research was to quantify the effect of different filter media on the treatment performance of vertical flow wetlands in the prevailing climate of Pakistan. Wastewater produced from the oil refinery contains high concentrations of organic and inorganic pollutants; therefore it cannot be discharged directly into river without any treatment. Phragmites karka were planted in both containers as a vertical flow wetland to evaluate their efficiencies in the purification of wastewater and their growth in wetlands fed with oil refinery wastewater. The results from a 1-year treatment showed that the purifying efficiency of constructed wetlands for oil-refined wastewater was low at the beginning but it improved gradually with the growth of plants and biofilm. Thus, a gravel-filled wetland and organic compost filled wetland were operated identically with primarily treated refinery wastewater at a hydraulic loading rate of 0.100 m d −1 , intermittently. According to the results, the removal efficiencies for the compost and gravel wetland cells varied as follows during the experimental period of 1 year: total suspended solids (TSS) (51-73% and 39-56%), chemical oxygen demand (COD) (45-78% and 33-61%), biological oxygen demand (BOD) (35-83% and 35-69%) and significant removal of heavy metals, i.e. Fe 2+ , Cu 2+ and Zn 2+ , was observed. The treatment performances of the compost-filled wetland were better than that of the gravel-filled wetland in terms of removal of COD and BOD.