Professor Bhattacharya is a Professor of Mining Engineering, Indian Institute of Technology Kharagpur. Professor Bhattacharya started his research in the area of mining equipment reliability engineering. He also continued working on the environmental engineering and management aspects of mining. Professor Bhattacharya is a renowned scientist in the area of environmental technology and management. He and his team developed a chemo-bioreactor and a gravity filter, among a few others. His team made pioneering contribution to the development of CaO,Ca (OH)2 and CaS nanoparticles for rapid precipitation and adsorption of in-soluble compounds from wastewater streams. He and his team developed and established a novel spectro-photometric method to measure sulfate concentrations in acidic/mining wastewater without the interference of mainly arsenate and phosphate ions. A continuous theme within his research is to develop natural carbon-hydrogen-nitrogen dosage supplements to support sustainable bacterial populations in wastewater remediation treatment. His works are published in the premier journals of environmental and wastewater engineering. He now works on new materials required for environmental remediation, like silver nanoparticle reactants, biochar and metal-organic framework adsorbents, and photocatalysis.