Waste management is becoming one of the most challenging tasks for developing countries in order to ensure good human health, as well as a healthy environment. Rajshahi City Corporation (RCC) is one of the 12 city corporations in Bangladesh. Various environmental and human health problems have arisen due to a lack of proper knowledge of waste management. Thus, the aim of this work is to illustrate the present status of MSW generation and management in Rajshahi City Corporation, Bangladesh. Fifty households were selected throughout RCC for waste collection, which represent approximately all types of households in RCC. From the qualitative and quantitative analysis, it is estimated that the approximate MSW generation in RCC is 358.19 t/d (tons/day) at an approximate rate of 0.4214 kg/person/d. Calorific values of the wastes have also been determined using the ultimate analysis results of the MSW. A higher calorific value of the dry MSW has been calculated as 14.9 MJ/kg. Moisture content of the MSW has been found to be 48.28%. It is also estimated that the possible power generation (steam energy to electrical power) from MSW generated in RCC is 159.40 MWh/d. Lastly, future scopes of MSW management and different waste management measures that need to be taken are illustrated. Waste-to-energy (WTE) conversion has been given priority and anaerobic digestion (AD) has been found to be an interesting prospect in this sector. Techno-economic analysis of the AD has been conducted. Energy potential from the proposed plant has been calculated as 3.85 MW and the payback period has been found to be 4.9 years. It has been observed that employing AD on a large scale can not only reduce the waste, but also meet a large portion of the energy demand of this city.

A Zeonex based slotted core microstructure fiber is presented and numerically analyzed in this article for different chemical sensing using terahertz signal. The propagation characteristics of the reported chemical sensor is investigated by using Comsol Multiphysics software with perfectly matched layer boundary condition. The simulation outcomes confirm that this sensor offers very high relative sensitivity of 89.5%, 88.86% and 88.7% at 1.8 THz for benzene, ethanol and water respectively. Along with excellent sensitivity the offered photonic crystal fiber based chemical detector shows negligible absorption loss of 0.02 cm −1 and extremely low confinement loss in the order of 10 −9 dB/m at same operating frequency and geometric parameters. This chemical sensor is very easy to realize and can be effectively employed in various promising spectroscopic applications.