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Volume 54, Issue 267, March 2018

About the Cover

India depends on Thermal Power as its main source, thus increase in power requirement every year. Present scenario of our country shows 75 % of country’s total installed power generation is thermal of which coal-based generation is 90%. The coal reserves of the country are predominately of lower grades, non-cooking and as a result more than 110 MT coal ash is being generated every year. Use of coal brings huge amount of ash every year. Ash generation may likely reach to 200 MT by 2015. The current percentage of utilization of fly ash in India is very less as compared to the other countries like Germany, Netherlands etc. The need of fly ash utilization also arises out of the fact that good quality Natural River sand required in concrete and in the cement mortar, is depleting day by day and scarcity of good quality sand is felt by all metro and mega cities in India. Large scale exploitation of natural sand creates environmental impact on society. River sand is most commonly used fine aggregate in concrete but due to acute shortage in many areas, availability, cost & environmental impact are the major concern. To overcome from this crisis, partial replacement of sand with fly ash can be an economic alternative. Design mix of M20 grade concrete with replacement of 20%, 40% and 60% of fly ash have been considered for laboratory test i.e. slump test and compressive strength. As per M20 Mix Design in this project we have replaced fine aggregate with fly ash.

Table of Contents

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POLLUTION SCIENCE

Biodegradation potential of Bacillus lentus Lp32 isolated from a coal tar contaminated site

Oramadike CE

Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous soil contaminants and they of environmental concern because of their mutagenic effects. In this study, a bacterium capable of growing on Pyrene, a high molecular weight PAH as a sole carbon and energy source was isolated by enrichment technique from a coal tar contaminated soil.

Discovery, 2018, 54(267), 79-87

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GEOSCIENCE

Qualitative analysis of Bouguer gravity map of parts of southern Niger delta, Nigeria

Ofoha CC, Emujakporue G, Ekine AS

Using Bouguer (aerogravity) data, processing and interpretation of structural features covering Oloibiri and Degema was undertaken.

Discovery, 2018, 54(267), 88-101

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ENGINEERING

Use of fly ash as partial replacement of sand in concrete

Akshay Baxi, Deepesh Kumar Patel, Govardhan Bhatt

India depends on Thermal Power as its main source, thus increase in power requirement every year. Present scenario of our country shows 75 % of country’s total installed power generation is thermal of which coal-based generation is 90%.

Discovery, 2018, 54(267), 102-108

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NUTRITION & DIETETICS

Nutritional evaluation of some non-conventional oil seeds on different processing techniques

Jibrin H, Abdul-Aziz I, Edah Bernard

A trial was conducted to assess the nutritional composition of some nonconventional oil seed ingredients on different processing methods such as boiling, soaking, toasting and raw. The oil seed ingredients include calabash seed, pumpkin seed and cotton seed.

Discovery, 2018, 54(267), 109-118

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