http://nopr.niscair.res.in/handle/123456789/4767 Search the Channel search http://nopr.niscair.res.in/simple-search http://nopr.niscair.res.in/handle/123456789/4824 Title: Leachate removal rate and the effect of leachate on the hydraulic conductivity of natural (undisturbed) clay <br/> <br/>Authors: Ozcoban, M S; Tufekci, N; Tutus, S; Sahin, U; Celik, S O <br/> <br/>Abstract: <smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="City"><smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="place"> Hydraulic conductivity (HC) is perhaps the most important unique parameter determined in the laboratory for predicting mobility of leachates through clay liners. Typically, HC must be < or = 1x10^-9 m/s for soil liners and covers used to contain hazardous waste, industrial waste, and municipal solid waste (MSW). Soil samples used in this study were obtained from the Kemerburgaz landfill in Istanbul. The study presents change in clay HC brought about by the chemical reactions between clay and a permeant. Any change induced by such a reaction in the microstructure (microfabric) of the clay was studied by scanning electron microscope. In order to determine the removal capability of the natural clay, COD, SS, VSS, Total P, TKN, Cu, Mn, Fe are also measured in the influent and effluent of the lab-scale reactor. </smarttagtype></smarttagtype> <br/> <br/>Page(s): 264-269 http://nopr.niscair.res.in/handle/123456789/4823 Title: Removal of indigocarmine from industrial effluents using low cost adsorbent <br/> <br/>Authors: Jain, Rajeev; Mathur, Megha; Sikarwar, Shalini <br/> <br/>Abstract: In the present paper, adsorption technique was employed for removal of indigocarmine and the technique was found to be very useful and cost effective for a better removal of dye. The operating variables such as adsorbent dose, adsorbate concentration, particle size, pH, contact time and temperature were optimized. <br/> <br/>Page(s): 258-263 http://nopr.niscair.res.in/handle/123456789/4822 Title: <smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="City"><smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="place"> Benzene and toluene profiles in ambient air of Delhi as determined by active sampling and GC analysis </smarttagtype></smarttagtype> <br/> <br/>Authors: Kumar, Anuj; Tyagi, S K <br/> <br/>Abstract: <smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="country-region"><smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="City"><smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="place"> Present study aims to standardise methodology for the measurement of benzene and toluene using active sampling onto sorbent tubes and to investigate their existing profile in the urban environment of Delhi, India. Samples were collected by active sampling onto preconditioned stainless steel standard adsorbent tubes packed with Tenax TA adsorbent using a portable constant low flow volume sampler. Sampling flow rate ranged 20-25 ml min^-1 and sampling duration 1.30-2.30 h. Samples were analysed by thermal desorption followed by gas chromatography coupled with automated thermal desorber. The desorption system was provided with a cryogenic trap filled with Tenax TA adsorbent. External calibration was performed using five concentration levels of standards solutions in carbon disulfide (CS₂). Linear fit in all cases were found good with R² > 0.99. Benzene concentration ranged 33.69-174.62 µg m^-3 whereas toluene ranged 45.18-228.83µg m^-3 in the vicinity of petrol pump along with heavy traffic roadside at Preet Vihar location. Average benzene and toluene concentration of ambient air at ITO (near a busy traffic intersection) ranged 13.03-33.06 µg m^-3 and 19.71-57.64 µg m^-3 respectively. While at East Arjun Nagar (a residential cum institutional area), levels were 17.69 µg m^-3 and 22.81 µg m^-3 for benzene and toluene, respectively. Present study indicated that the concentration of benzene at all the sites was higher than the limit values prescribed in the UK (16 µg m^-3, running annual average) and European Commission (5 µg m^-3, annual average). Average toluene and benzene ratio ranged between 1.29 µg m^-3 in residential cum institutional area to 1.74 µg m^-3 at busy traffic intersection. </smarttagtype></smarttagtype></smarttagtype> <br/> <br/>Page(s): 252-257 http://nopr.niscair.res.in/handle/123456789/4821 Title: Treatment of brewery wastewater by pilot scale upflow anaerobic sludge blanket reactor in mesophilic temperature <br/> <br/>Authors: Oktem, Yalcın; Tufekci, Nese <br/> <br/>Abstract: In this study, treatment of brewery wastewater by pilot scale upflow anaerobic sludge blanket (UASB) reactor in mesophilic phase was investigated. UASB reactor was achieved with brewery wastewater to an organic loading rate (OLR) of 7 kg COD/m³-d at 12 m/d upflow velocity with a hydraulic retention time (HRT) of 3.5 day, and chemical oxygen demand (COD) removal efficiency of 95% with a methane yield of 0.30 m³ CH₄/kg COD _removed. At an OLR 0.20 kg COD/m³-d, sludge concentration was increased and reached even 70000 mg/l at the end of 6 ^th month. At the end of experiment, a granular sludge with good settling properties was produced. <br/> <br/>Page(s): 248-251