1.
Comparitive Study Of Biogas Production From Wastewater Sludge Of Tehsil Municiple Administration (Tma) Ravi Town Drains In Lahore
by Hira Khalid (2014-VA-229) | Dr. Saif ur Rehman Kashif | Dr. Muhammad Nawaz.
Material type: ; Literary form:
not fiction
Publisher: 2016Dissertation note: Global expansion in energy demand has convinced energetic search for alternative energy
sources. Biogas is an energy-rich combination of mainly methane and carbon dioxide and can be
used for active purposes. It is a cheap way to meet energy crises. It is an odorless, colorless and
flammable gas with an energy content of 37.3 MJ/m3. It is produced by process of anaerobic
digestion comprising of three steps i.e. hydrolysis, acidogenesis/acetogenesis and
methanogenesis. Out of the 14 drains in Lahore, sludge samples were collected from Samanabad,
outfall and Gulshan-e-Ravi drains. These samples were analyzed for Electrical conductivity (HI
8633 EC meter), pH (HI 2210 pH meter), BOD5 (HI 9146 DO meter), Total carbon content,
Nitrogen (Kjeldhal’s method), Phosphorus (V-110 spectrophotometer), Potassium (Multichannel
Flame photometer-AFP 100) and Heavy metals (including Cr, Cu, Pb, Zn and Ni by
Polarized Zeeman Z-8230 Atomic Absorption Spectrophotometer).
pH went from 6.37 to 7.66 (from slightly acidic to basic in nature) inside the biogas digesters
while temperature inside the biogas digesters ranged from 26.1°C-32.2°C. Electrical conductivity
of sludge samples varied from 1.38 mS/cm to 2.23 mS/cm and TDS ranged from 883.2 mg/l to
1427.2 mg/l. Carbon content of wastewater sludge ranged from 1.3983 g to 2.3677 g while total
Kjeldhal’s nitrogen varied from 40.6 mg/l to 59.2 mg/l. Nutrients like Phosphorus varied from
15750 ppm to 17250 ppm and Potassium ranged from 602.5 ppm to 9775.5 ppm in sludge
samples. Concentration of heavy metals i.e. Lead (Pb) in sludge samples varied from 2.58 ppm
to 2.94 ppm, Copper (Cu) went from 0.05 ppm to 0.79 ppm, Zinc went from 5.13 ppm to 5.28
ppm, Nickel (Ni) ranged from 0.11 ppm to 0.35 ppm while Chromium (Cr) was not detected in
samples.
Summary
43
Variation in water concentration in the digesters of drain A made a difference of 900.800 ppm in
CH4 concentration, 0.016 % vol of CO2, 0.020 in pH and 1.090 °C in temperature. While
variation in water concentration in the digesters of drain B made a difference of 483.499 ppm in
CH4 concentration, 0.331 % vol of CO2, 0.019 in pH and 0.110 °C in temperature. And in that of
the digesters of drain C made a difference of 238.295 ppm in CH4 concentration, 0.187 % vol of
CO2, 0.015 in pH and 0.490 °C in temperature. Highest methane potential was found in Drain A,
followed by drain B and C. Absence of H2S shows that the biogas produced anaerobically from
the municipal wastewater sludge can be an environmentally friendly source of energy. Availability: Items available for loan: UVAS Library [Call number: 2756-T] (1).
2.
Microbial And Physicochemical Analysis Of Drinking Water Quality Of Government Installed Water Filtration Plants Of Lahore In Comparison With Tap Water
by Syed Mubeen-ur-Rehman (2014-VA-945) | Ms. Isbah Hammed | Dr. Saif-ur-Rehman Kashif | Dr. Muhammad Nawaz.
Material type: ; Literary form:
not fiction
Publisher: 2016Dissertation note: Water is an important constituent for survival after oxygen. Internationally, hazardous
drinking water passing through poor hygiene kills almost 1.6 million children below the age of
five annually. Various physical parameters that represent the quality of drinking water should be
in safe limit. Heavy metals such as lead (Pb), Arsenic (As), Nickel (Ni), copper (Cu) and
chromium (Cr) have adverse effects on humans. Drinking water should not contain any
pathogenic organism or any bacteria indicating bacterial contamination. Presence of coliforms in
water is considered as bacterial contamination. In this study three filtration plants were selected
randomly from each town three samples of tap water and filtered water were taken after 15 days
respectively. Overall 162 samples were collected for the study. Parameters that were used to
determine the physical characteristics of water were Color, total Hardness as CACO3, Total
Dissolved Solids (TDS) and pH. Chemical characteristics included detection of Arsenic,
Calcium, Chloride, Chromium, Copper. Toxic inorganics included Lead, Manganese, Nickel,
Selenium and Zinc were analyzed. Microbiological quality of water was examined in terms of
Escherichia coli (must not be detectable in any 100 ml sample) and total coliforms (Must not be
detectable in any 100 ml sample). The results observed are as follows: pH of tap water ranged
from 5.56 to 8.49 in tap water while that of filtered water ranged from 7.46 to 8.37, TDS in tap
water varied from 52 mg/L to 1025.3 mg/L while that in filtered water was 217.91 mg/L to
1098.6 mg/L, chlorides in tap water ranged from 47.5 meq/L to 592.8 meq/L while that in
filtered water were from 41.5 meq/L to 520.6 meq/L, Hardness of tap water samples varied from
20.1 mg/L to 260 mg/L while that of filtered water samples were from 40.4 mg/L to 290.9 mg/L,
calcium (Ca) in tap water ranged from 17.8 mg/L to 48.3 mg/L while that in filtered water was
Summary
41
14.7 mg/L to 51 mg/L, Manganese (Mn) in tap water ranged from 0.01 mg/L to 0.19 mg/L while
in filtered water it ranged from 0.01 mg/L to 0.13 mg/L, Zinc (Zn) in tap water samples varied
from 0.01 mg/L to 0.25 mg/L while in filtered water samples it went from 0.01 mg/L to 0.09
mg/L, Arsenic (As) ranged from 0 to 0.05 mg/L in tap water while in filtered water it went from
0 to 0.023 mg/L, Lead (Pb) in tap water ranged from 0 to 0.06 mg/L while in filtered water it
ranged from 0 to 0.01 mg/L, Chromium (Cr) in tap water varied from 0 to 0.6 mg/L while in
filtered water it went from 0 to 0.2 mg/L while Copper (Cu), Selenium (Se) and Nickel (Ni) were
not detected in tap water samples as well as in filtered water samples. 3.7% coliforms were
present in filtered water samples while tap water had 7.4% of total coliforms. 22.2 % E. coli were
present in filtered water samples while 40.7% E. coli were present in tap water samples. Availability: Items available for loan: UVAS Library [Call number: 2759-T] (1).
3.
Leachate Characterization Of Lakhodair Landfill And Coagulation/Flocculation Treatment
by Madeeha Saleem (2015-VA-08) | Ms. Isbah Hameed | Dr. Saif ur Rehman Kashif | Dr. Muhammad Nawaz.
Material type: ; Literary form:
not fiction
Publisher: 2017Dissertation note: Decomposition of solid waste in landfill site produces highly polluted leachate. In most of the landfill worldwide collection, handling, treatment and disposal are major issues associated with landfill operation. Open, untreated disposal of the landfill leachate poses serious threat to the receiving environment and public health. It also leaches and reaches groundwater polluting the aquifer. Since it is contains huge variety of pollutant or contaminant such as (organic matter, suspended and dissolved solids, heavy metals, persistent organic pollutants etc.), it required adequate treatment before disposal leachate treatment with municipal wastewater is neither required nor can produce efficient and economical results. Coagulation has be found to effectively reduce contaminant loading from leachate, alone and in combination with other method, as applied on leachate taken from different landfill in different studies. This study targeted characterizing the leachate from Lakhodair landfill site on the basis of the selected parameters (pH, EC, Turbidity, TDS, TSS, Hardness, BOD5, COD, Cl-1, Na, K, Ni, Cr, Pb, Mn, Zn, Cu and Fe). Leachate samples were collected from Lakhodair landfill site in plastic bottles, brought to laboratory, preserved and analyze for the above mentioned parameters. Lakhodair landfill site was inaugurated 18 April 2016. Since the leachate was young and the solid waste at Lakhodair landfill site had not undergone acidogenic phase of decomposition, the leachate was slightly alkaline (pH = 8.43) and quite high in organic loading (in term of COD and BOD5), Sodium, Potassium, and few heavy metals like Ni and Cr. High concentrations of some contaminants not studies in the literature (TDS, TSS, EC, Hardness, Turbidity, Chlorides). Other tested heavy metals (Pb, Mn, Cu, Zn, Fe) were found in low concentration due to low solubility at alkaline pH. Leachate samples were subjected to coagulation/flocculation with 0.8, 1.0, 1.2,
SUMMARY
53
1.4, 1.6 g/L of Alum, Ferric chloride and their mixer, and tested for same parameters after treatment. Treatment comprise 5 min rapid mixing, 30 min slow mixing and settling time of one hour. Heavymetals (Zn, Pb, Fe. Ni, Cr, Cu and Mn) have been detected in leachate through Hitachi Z-8230 atomic absorption spectrophotometer. Minerals (Na and K) have been detected by using flame photometer.pH, EC and Turbidity were measured by their respective meters. TSS and TDS were determined by gravimetric method. Titration was used for COD, Hardness and Chlorides. BOD readings were measured by BOD5 Incubator (SAYO MIR-153). Expect for TDS, Hardness, K and Cr the three coagulants responding different to all the tested pollutants, mixed coagulant perform the best giving as high as around 90-100 % removal for many of them. Post-treatment concentrations of all the parameters except TDS were significantly related to the coagulant dose. Since Ferric chloride and mixed coagulants had chlorides in them, they resulted in high post-treatment chloride concentration with increase in their doses while Alum its reduction. Alum and the mixed coagulant cause in increase in TDS while Ferric chloride cause an increase in TSS in the leachate at higher doses. Leachate TSS was maintaining constant at around 800 mg/L at all doses. The coagulant doses show positive correlation with Hardness and EC and negative correlation with pH, Turbidity, BOD5, COD, Na, K, Ni, Cr, Pb, and Mn. % removal from as low as 1.1 – 19.06 for BOD5 to as high as 32.59 – 92.7 % for Nickel was achieved as a result of coagulation. Comparison was made with standards for reuse of leachate in landscape irrigation (as prescribed by JS, 2002 in Annexure IV) and open disposal into inland water or sewage treatment plants (as prescribe in PEQS and given in (Annexure V). Stringent FEPA standard has also be included only for Pb. Comparison with standard shown that coagulation is good pre-treatment option as it has help lowering contaminant load from leachate and meeting PEQS standards for disposal into sewage treatment plant as set in PEQS, but it not sufficient to treat leachate to reuse for landfill irrigation. Availability: Items available for loan: UVAS Library [Call number: 2912-T] (1).
