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Articles by Abdullah Yasar
Total Records ( 3 ) for Abdullah Yasar
  Abdullah Yasar , Nasir Ahmad and Aamir Amanat Ali Khan
  Anaerobic treatment did not eliminate the enteric pathogens (total coliform, fecal coliform, fecal streptococci, Salmonella and E. coli) in effluent and requires post treatment. In this study, an attempt was made to treat Upflow Anaerobic Sludge Blanket (UASB) reactor treated effluent by ozone (O3) and conventional polishing processes (oxidation ponds, diffused aeration and sunlight). Ozonation at the rate of 300 mg h-1 resulted in optimal pathogen removal of 99% at 30 min ozonation time. The same removal efficiency was achieved at the ozonation time of 20 min when 2 ft effluent head was maintained, by reducing the diameter of reactor column, due to enhanced liquid-gas contact. As far as the conventional techniques were concerned, three parallel lab scale oxidation ponds were developed. Spectacular algal growth was achieved due to the presence of nitrogen and phosphorous in the treated effluent. Dissolved Oxygen (DO) content of water was increased to the saturation level due to photosynthesis. At retention time of 2 days, more than 99% removal of pathogens was achieved. Other conventional methods sunlight irradiation and diffused aeration failed to give any significant results.
  Abdullah Yasar , Nuzrat Yar Khan , Ammara Batool , Amtul Bari Tabinda , Rashid Mehmood and Akthar Iqbal
  This study is an attempt to investigate the quality of drinking water used by community and their perception towards water quality. Water samples were collected from hand pump, motor pump and tube well. Total 160 households were surveyed to check their perception against drinking water quality. The results showed the values of bacteriological parameter fecal coliform were above WHO guidelines which made water unfit for drinking purposes. The community was unaware of the quality of water they were drinking. Women with higher education had perception of smell (F = 3.51, p<0.01), taste (F = 3.10, p<0.05) and turbidity in water (F = 5.34, p<0.01). Incidence of water borne diseases especially in infants appeared to be common problem among the sampled households in the study region. Lack of proper water supply system, proper sanitation and drainage facility were the common and contributing to poor health of people.
  Farooq Ahmad , Amin U. Khan and Abdullah Yasar
  Eutrophication of water bodies is matter of concern for the last few decades because wastewater without treatment can cause serious health effects and disturb functioning of ecosystem. The objective of the current study was to utilize nutrient present in wastewater for algal growth and biodiesel production from harvested biomass of algae. Mixed algae culture (Microspora sp., Diatoms, Lyngbya sp., Cladophora sp., Spirogyra sp. and Rhizoclonium sp.) collected from Botanic Garden of Government College University Lahore was grown in artificial ponds of 13.5 L capacity. Algal growth was monitored for six days by measuring its fresh and dry weight which showed almost similar results of 3.34 g/day and 3 g/day respectively. Uptake of total Kjeldahl nitrogen (55%), total phosphorous (61%), nitrate (97%), phosphate (93%), sulphate (34%) and chloride (41%) was carried by mixed algae culture from wastewater. Seasonal variation in the absorption of nutrients in alternate months of the year showed higher uptake in March, September and November due to favorable conditions for algal growth. Yield of biodiesel produced by transesterification of dried algal biomass was calculated to be 15.13% on an average. Quality of biodiesel was analyzed for kinematic viscosity (4.5 mm2/s), flash point (167°C), specific gravity (0.895 g/ml), iodine value (80 mg/g), acid number (0.65 mg. KOH/g) and water contents (32 mg/kg). It was found that the quality of biodiesel was according to the ASTM standards for biodiesel.
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