INTERNATIONAL JOURNAL OF CHEMICAL AND PHYSICAL SCIENCES

1-12

Authors: R. K. JADHAO

The objective of present study is to study impact of sludge retention time (SRT) and hydraulic retention time (HRT) on Soluble Microbial Products (SMP), Proteins and Carbohydrates for residential quarter wastewater. The experiments have been performed on laboratory-scale hollow fiber submerged membrane bioreactor (MBR) for two different seasons. The two seasons considered was dry season i.e. summer season and another is wet season i.e. rainy season. For residential quarter wastewater , the SMP is varied from 7.9 to 8.6 mg/l. Protein is varied from 4.0 to 5.8 mg/l. Carbohydrate is varied from 2.4 to 4.25mg/l and C/P ratio is varied from 0.47 to 1.20. It is observed that SMP and Carbohydrates are increase with increase in SRT and HRT and Proteins decrease.

21-25

Authors: RAMA DHANARIYA, DR. SARITA SHARMA, DR. ASHOK K. SHARMA, DR. SANJAY VERMA

The proper management of solid waste is the need of the time. The solid waste consists of various components, some of them are biodegradable where as other are non biodegradable. The waste from various biodegradable sources could be utilized as a feed material for the gas production. The objective of this study is food waste management through biogas production. Various parameters were studied during biogas production like total solid, pH, suspended solid, biological oxygen demand, and chemical oxygen demand. The present study is helpful to set up small scale biogas plant with locally available waste material.

32-38

Authors: N.D. CHAUDHARI, S. G. SONKAMBALE, P. V. PATIL

NixZn1-XFe2O4 ferrites with x = 0.28, 0.30, 0.32, 0.34, 0.36, 0.38, and 0.40 have been synthesized by oxalate precursor method. This paper describes the variation of real [μ΄] and imaginary [μ΄΄] part of permeability for the present ferrite system in the frequency range (20 Hz to 1 MHz) and from room temperature to Curie temperature Tc. The frequency variation of μ΄ and μ΄΄ clearly indicate the low frequency dispersion which may be attributed to domain wall movements. μ΄ and μ΄΄ do not exhibit much variation with temperature except near Tc where they fall sharply. The maximum of μ΄΄ near Tc has been attributed to the damping effect of domain wall motion. Variation of Relaxation time suggests that the respond of the material to the field slowed down.

45-54

Authors: P. DEIVANAYAGAM, S. RAJ KUMAR , S. SELVARAJ

In the present work, [1-(thiophen-2-yl] ethylidene] hydrazine and 4, 4’-(hydrazine-1,2- diylidenedimethylylidene)bis(N,N-dimethylaniline) were synthesized, it is condensation between 2-acetyl thiophene and hydrazine, p-dimethyl amino benzaldehyde with hydrazine hydrate. The structures of the synthesized compounds were characterized on the basis of IR and 1 HNMR spectral data. Among all synthesized compound I and II are screened for their CNS activity. Chlorpromazine is employed as a reference standard. From the results it is concluded that, compound II show more depressant activity than Compound I. The synthesized compound was subjected to analgesic studies with control saline as a reference standard and shows a significant increase in analgesic activity

60-67

Authors: INDU SAXENA, RIKKAM DEVI., RAHUL KUMAR.

A new technique of measuring the densities of solvents and solutions by using magnetic float densitometer has been given. The densitometer works on the electrostatic attraction of force developed by the passage of current through a solenoid. Using this technique, the densities(ρ’s) of N-methyiformamide (NMF)-t-butanol mixtures at 22,40, 60, 80,& 100% N-methylformamide in t-butanol (v/v) and those of solution (ρ’s) of some tetraalkylammonium iodide, namely Et4NI, Pe4NI, Bu4NI &Pen4NI in these solvent mixtures have been determined experimentally by magnetic float densitometer at 25c. The apparent volumes have been calculated from density data and plotted against √conc. The slopes of these curves show that in low dielectric constant medium (22%NMF, Є=46), all the four tetraalkylammonium salts have positive slope. But as the dielectric constant of the solvent medium is increased by adding N-methylformamide in t-butanol, each of the four electrolytes has negative slope. The data have been explained on the basis of dielectric constant of the solvent mixtures and size of the electrolyte ion.

75-82

Authors: B. R. SUDANI

We all know that water is our most important life survival factor, but due to urbanization our surface water bodies are being polluted day by day. In order to maintain the water quality of any surface water body it requires accessing the physiochemical and biochemical aspects of water periodically. This investigation is one of the most overlooked aspects of pond management system too. Present study highlights the preliminary investigation of physiochemical characteristics of four pond ecosystems viz. Halar Talav, Nanakwada Talav, Rakhodiya Talav and Segvi Talav. From each pond randomly 11 samples were collected and mixed to make four better representative samples. These samples have been assessed on the basis of various qualitative parameters like pH, temperature, turbidity, electrical conductivity (EC), total dissolved solids (TDS), total suspended solids (TSS), total hardness (TH), Total Alkalinity (TA), Chloride (Cl), dissolved oxygen (DO), chemical oxygen demand (COD), biological oxygen demand (BOD). The results obtained from the present work indicate that there are some diverse contaminations and pollution in these ecosystems. Therefore it is unsafe to use directly for human uses and hence needs more attention for its sustainability factor.

93-104

Authors: S. M. KANAWADE

Growing water scarcity in India is compelling people to use the treated wastewater at least for landscape irrigation and plantation to augment available water resources. In the present study, a laboratory scale electrocoagulation (EC) process was utilized to treat the raw wastewater in order to bring the quality up to the international wastewater reuse standards. Effect of various operating parameters such as operating time, current density and inter-electrode spacing was evaluated to achieve the maximum possible treatment efficiency. It was found that the application of 24.7 mA/cm2 current density with an interelectrode spacing of 5 cm may provide 91.8%, 77.2% and 68.5% removal in turbidity, COD and TSS within 30 minutes of EC treatment. The quality of treated wastewater was compared with various international standards/guidelines for wastewater reuse. It was found that the studied parameters such as BOD, COD, TDS, TSS, turbidity, NO3-N, NH3- N, chloride, Na+ , Ca2+, Mg2+, sulfate, total phosphorus, electrical conductivity Oil and Grease (O & G) and total coliform (TC) were within allowable limits. Electrical conductivity, TDS and Sodium Adsorption Ratio (SAR) are mainly used for the determination of wastewater suitability for safe irrigation. Their values do not exceed the international wastewater reuse standards. The study shows that the raw wastewater generated at the study site after EC treatment is safe for landscape irrigation and plantation.

115-120

Authors: SUNIL KUMAR SIKARWAR , V. R. CHOUREY AND A. A. ANSARI

Densities and viscosities of alcohols at different temperature (298.15, 303.15, 308.15, 313.15) have been measured from experimental data. The apparent molar volume, limiting apparent molar volume, Jones- doles A and B coefficients were calculated. The results show strong solute- solvent interaction that indicates all selecting alcohols are structure makers in aqueous solution.

128-136

Authors: SHITAL MUNDE, T. BHATTACHARJEE

The ever-increasing generation of distillery spent wash in one hand and stringent legislative regulations of its disposal on the other has stimulated the need for developing new technologies to process this effluent efficiently and economically.The distillery generates large volumes of dark brown coloured, acidic wastewater called spentwash, which is highly acidic in nature and having recalcitrant coloring compound as melanoidin.In the present paper, detailed studies on the in situ chemical oxidation of melanoidin using persulfate as oxidizing agent and activation of it by heat was investigated. The effect of various operating parameters such as oxidant dosage, initial concentration of melanoidin and pH of solution on the degradation of melanoidin have been studied and optimized.