Mitsui & Co Ltd on Wednesday said it will invest Rs 30 crore (USD 4.1 Million) in Punjab Renewable Energy Systems Pvt Ltd (PRESPL), one of the leading biomass supply-chain management companies in India. PRESPL is involved in the collection, storage and processing of agricultural residues. It produces biomass briquettes and pellets to meet the growing demand for biomass fuel from India's rapidly expanding bio-energy industry, a statement said. It also provides a range of operation and maintenance, and other technical services to the industry.