Saturday, 21 September 2019

Engineering Journal: May 2019

Engineering Journal: published its volume-5, Issue-5, May 2019 with AD Publications

Characterization of Biogas Production from Anaerobic Digestion of Animal & Plant Wastes

Abstract— The negative impact of the increased use of fossil fuels for energy generation and consumption has reached a global dimension and can no longer be over looked. All efforts are now being geared towards an alternative source of energy, renewable in nature and more environmental friendly in use. This study investigates the production of biogas – a renewable energy from the anaerobic digestion of three different types of biodegradable wastes (Cassava peelings and poultry droppings, Beans waste and poultry droppings, Cassava peelings and beans wastes) as an alternative to fossil fuels for energy consumption. The study was carried out using a 0.1m3 capacity biogas digester constructed to investigate the anaerobic digestion in generating biogas. The experiment was batch operated and daily gas yield from the plant was monitored for 24 days. During this period, many operation factors were monitored to determine the effect each of them has on the biogas generation. These factors monitored are temperature changes, Pressure changes, pH changes, changes in alkality, Cassava peelings and poultry dropping generated the highest maximum biogas of 0.035m2/kg/day at a PH value of 7.35 on the 19th day. This was followed by poultry droppings and beans mixture. Cassava peelings and beans waste had the least volume of biogas. This treatise assets that biogas is not only a renewable energy source but has a dual function of waste management in the course of its production.

Keywords Biogas, Renewable energy, Anaerobic Digestion, Waste, Fossil.

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FMEA Methodology Capabilities in Environmental Risk Management

Abstract The paper asserts convincingly the appropriateness of the Failure Mode and Effects Analysis (FMEA) methodology for risk identification and minimization activities based on the analysis of potential process inconsistencies disclosed through a quantitative analysis of cause-and-effect discrepancies. Advanced in the paper is also an in-depth analysis of FMEA methodology applicability for the development of new projects and technologies, for production process and product quality planning analyses and takes a closer look of FMEA methodology capabilities in environmental risk management.

Keywords FMEA, methodology, analysis, process, environmental risk.

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Motion of A Rocket in Three-Dimension with Constant Thrust Over A Spherical Rotating Earth Holding Constant Heading and Constant Path Inclination

Abstract In this paper we have determined the velocity and altitude of a spacecraft and then equation of its trajectory with constant thrust, constant heading and constant path-inclination by regulating the bank angle and angle of attack.

Keywords Path inclination, constant, relative, rotating, spherical, Bessel's equation, angular velocity, thrust, rocket.

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Study of association between pre-test knowledge and selected demographic variables of Primary School Teachers regarding selected emotional and behavioural disorders of children.

Abstract The early years of a child’s life are very important for his or her health and development. Healthy development means that children of all abilities, including those with special health care needs, are able to grow up where their social, emotional and educational needs are met. Having a safe and loving home and spending time with family―playing, singing, reading, and talking―are very important. Proper nutrition, exercise, and sleep also can make a big difference.

Children's emotional and behavioural disorders are disorders that affect not only children’s behaviour, emotions, moods, or thoughts, but can also affect the entire family as well. The established pattern of emotional or behavioral responses might adversely affect educational or developmental performance including intrapersonal, academic, vocational or social skills.

Keywords— children early age growth, children behavior, health care of children.

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