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.

As the demand for power increases, installing small‐scale wind turbines can be an alternative solution. However, the main challenge for their implementation is the aerodynamic noise. With a view to minimizing noise, this study focuses on the performance investigation of a small‐scale horizontal‐axis wind turbine with NACA 4412 blades inspired by humpback whale flippers (trailing‐edge tubercles and inward dimples). Wind turbines with conventional NACA 4412 blades and modified biomimetic NACA 4412 blades were tested in six angles of attack (AOAs) between wind speeds of 4 and 11 m/s. The cut in speed was less for the modified bladed wind turbine and delivered higher rotational speed than the conventional one. The wind turbine equipped with the modified blade produced a power output of 14.98 W at a wind speed of 8.8 m/s, surpassing the 13.72 W, generated by the conventional bladed turbine. At 30° AOA, the power coefficient of the modified bladed turbine was 56.43% higher, and the sound pressure level was 2.99% lower. Hence, the redesigned biomimetic NACA 4412 bladed design improves wind turbine efficiency and results in noise reduction, potentially enabling more sustainable wind energy options.