IOSR-JESTFT   Volume-13 ~ Issue-5 ~ May 2019

Abstract: The biochemical responses of antioxidant defense system in crucian carp (Carassius auratus) liver after exposed to municipal sewage treatment plant (MSTP) effluent were investigated. In this study, C. auratus was exposed to the increaseing concentrations (v/v, 0%, 5%, 10%, 20%, 30%, 40% and 50%) of MSTP effluents for 12 days, and the biochemical responses of antioxidant defense system in Carassius auratus livers were investigated, including malondialdehyde (MDA), superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx), glutathione (GSH), and acetylcholinesterase (AChE). Results indicated that MDA contents and GPx activities in C. auratus livers showed a universal increase trend (P<0.05), while GSH contents and AChE activities were decreased significantly (P<0.05) as......

Keywords: Biochemical response, Crucian carp, Effluent, Municipal sewage treatment plant

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Abstract: Iodine in Solanumnigrum, Amaranthaceaeand Cucurbitacucurbitaceawas pre-concentrated using new adsorbent of a powdered mixture of millet tassels (MT), maize cobs (MC) and beans husks (BH). Prior to its use, powdered MT, MC and BH were separately treated with thionylchloride (SOCl2) in dimethylformaldehyde (DMF), filtered then dried. The resulting solid was refluxed in ethylenediamine for 4 hours. The surface characteristics of the adsorbents were determined using fourier transform infrared. Batch sorption experiments were carried out to determine the optimum conditions of pH, concentration, dosage and time for the adsorption of iodine. Correlation coefficient obtains by modelling data to Langmuir and Freundlich isotherms were compared to determine the best model for adsorption. Sorption kinetics was studied using pseudo first order and pseudo second order.

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Abstract: The shelf stability of ready-to-consumekunun gyada powder samples were evaluated for 9 months by analyzing changes in water activity, colour, development of peroxides and rancidity, microbiological changes and consumer acceptability of the product stored at 24oC±2 and relative humidity of 41±2%. Results showed stability in the water activity (aw) with a range between 0.37and 0.61. The peroxide value (PV) range between 0.19-0.52 meq/kg, KGP5 had the lowest peroxide value 0.19 meq/kg. The thiobarbituric acid value (TBA) of the product was low during the 9 months storage period.Values range between 0.21-0.38 MAE/kg. The kunun gyada powder had no mold, yeast, bacteria and coliform growth during the storage period..........

Keywords: Kunun gyada, peroxide value, thiobarbituric acid value, consumer acceptability and microbiological changes

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Abstract: Wastewater generated in school and colleges have to take care as it may pollute the ground water if not treated properly. This paper focuses on the design of a STP unit in Bearys Institute of Technology (BIT), Mangalore for the treatment of boy's hostel wastewater of 160 students with 135 LPCD. Physical and chemical characteristics of the wastewater samples showed a low strength in pollutant concentrations. Treatment units were planned and designed based on the existing condition. Equalization tank was designed for flow balancing; however, flash mixer was designed to mix coagulants. Suspended particles can be removed with clariflocculator and generated floc can be sent to the sludge drying bed. Colloidal and finer particles can be removed in rapid gravity filter and disinfection unit was designed for destroying the pathogens and ensuring safe disposal of treated wastewater.

Keywords: Characteristics, Design, Dimension, Sewage, STP

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