Water pollution is one of the significant dangers to general wellbeing in Bangladesh. Drinking water quality is inadequately overseen and checked. Bangladesh positions at number 86 among 142 countries with respect to drinking water quality. Drinking water sources, both surface and groundwater are debased with coliforms, harmful metals and pesticides all through the nation. Different drinking water quality parameters set by WHO are every now and again damaged. Human exercises like uncalled for transfer of civil and mechanical effluents and aimless utilizations of agrochemicals in agribusiness are the principle factors adding to the crumbling of water quality. Microbial and substance contaminations are the primary elements mindful solely or in mix for different general medical issues. This paper presents a detailed layout of water quality in Bangladesh with unique accentuation on significant poisons, sources and causes of pollution. The information introduced in this paper are extracted from different surveys and reports distributed in national and global journals. Likewise reports discharged by the government and NGO associations are incorporated.BIBECHANA 15 (2018) 97-112

Purpose: Underdeveloped along with developing countries face enough crisis of human resources in high-tech industries. As a result, the amount of waste is higher along with less productivity. Highly qualified and smart employees are required as the term “Industry 4.0” introduces a lot of sophisticated and complex technologies that dominates productivity. But in those countries, to cope up with this terminology; neither the educational curriculum and method of teaching has been modified nor changed yet nor will be modified soon. So, the engineering students should be introduced with the aims and technologies of Industry 4.0 and its key technologies so that they can prepare themselves as highly skilled and qualified human resources besides academic courses.Design/methodology/approach: This article mainly depicts the causes of poor technical skills of the engineering students of Bangladesh and a new learning process has been proposed. The model proposed is basically inspired by Kaizen philosophy consisting of initiation, sharing and implementation cycles. The key aspects of human resource quality and the possibility of gaining innovative human resources for smart industries are given equal priority here. The prime factor to evaluate any learning outcome is quality and this research is a structured guideline to achieve sustainable quality education needed for “Industry 4.0” to engineering students.Findings: This paper provides statistical analysis on “Fitness of undergraduate engineering students for Industry 4.0”. After applying the proposed methodology on 130 students from different public engineering institutes of Bangladesh, the significant improvement of effectiveness in learning various topics of “Industry 4.0” besides academic studies has justified the method to be a successful one measuring by the criteria for fitness of human resource. This research aims to clarify the sustainable and work-based learning goals and methods for Science, Technology, Engineering and Management (STEM) students and professional courses.Research limitations/implications: This is a research where the proposed methodology was applied upon academically enrolled engineering students and the result was very satisfactory. A sustainable learning strategy for developing professional skills from academic life can result in better productivity at the beginning of a career. However, this methodology can be applied for job holders or professionals besides their office hours thus it is the future scope of this research methodology.Originality/value: This research represents the crucial factors related to technical education and skill development for the upcoming challenges and possible remedies needed for Industry 4.0. Therefore, students should become aware of their carrier challenges and the administration concerned for education to minimize the scarcity of skilled human resources needed for the Fourth Industrial revolution.

In this paper, a decentralized low-cost water treatment plant is designed using empirical equations. From the analysis of water quality of Bangladesh, it is seen that the standard level of water quality is not maintained in Bangladesh. First, the primary treatment plant is designed including septic tank and anaerobic pond design. But only primary plant is not enough for the removal of impurities, for this reason secondary treatment plant is designed considering facultative pond, wetland and sand filter. Wetland and facultative pond can remove almost 70% of N and 55–60% of P. The designed plant has an efficiency of 65% in both N and P removal and the effluent amount will be 8.1 mg/L and 1.5 mg/L respectively. The other parameters like arsenic and BOD are also discussed in this paper. Finally, a detailed feasibility analysis of the plant is discussed including environmental impact, technical analysis and installation and running cost. The installation cost of the plant is around 650–700 dollar, whereas a conventional water treatment plant of the same capacity costs 2000–3000 dollar approximately. The designed plant is very much compatible for a big family or two–three small families. Finally, some recommendations are provided which may be considered as future research work.

Leakage of Liquefied Petroleum Gas and Liquified Natural Gas (LPG/LNG) produces hazardous and toxic impact on humans and other living creatures. The authors developed a system to monitor and control the gas leakage concentration. MQ-6 gas sensor is used for sensing the level of gas concentration in a closed volume. To monitor the consequences of environmental changes an IoT platform hosted by “Thingspeak” platform has been introduced. Both robust and cloud-forwarded controls have been applied to prevent uncontrolled leakage of those gases and auto-ignition. This type of system can be directly applied to the engine chamber/ fuel chamber of the modern marine vessels using dual fuel power cycle with LPG/LNG as secondary fuel-flamer. The results from the experiments clearly indicate satisfactory actuation speed and accuracy. The trials performed by the authors showed about 99% efficiency of signal transmission and actuation.

Background: Auto rickshaws are compact, three-wheeled vehicles which are normally used altogether in numerous Asian nations (i.e.China, Japan, Bangladesh, India, Pakistan and so forth) for transportation of people and products. The vehicles are little and have simple transportability in occupied Asian cities. In Bangladesh, auto rickshaws/simple bicycles regularly offer their taxi services, as they are fantastically reasonable to work. Simultaneously, these three-wheelers running on fuel cause extreme air-pollution and create impressive measures of greenhouse gasses (i.e.Carbon dioxide).Objectives: This paper introduces a transportation system in view of auto rickshaws that work in an eco-accommodating way. Existing vehicles are to be substituted by a small scale-cross sort framework overhauled in a way which helps the productivity of the vehicle.Methods: A reviving foundation is suggested that will take into consideration the power-packs to be charged utilizing halfway energy, for example, solar energy. Necessary simulations had been done using MATLAB platform.Results: Results shows that the current vehicle and nature, in which it works, made a model of the vehicle and researched re-charging infrastructure prerequisites and plans. About 31% efficiency was observed.Conclusions: The objective of the research introduced in this paper is to build up a conservative, vigorous and feasible fuel utilization system and deplete auto-rickshaws. In this research, 23% of grid power savings has been found.