Central India's Sarda Energy and Minerals Limited (SEML) has received consent to operate from Chhattisgarh Environment Conservation Board to enhance the production capacity of its iron ore pellet plant from existing 800,000 t to 900,000 t, the company reported in a BSE filing. SEML was among the pioneers in the nation to use Grate-Kiln technology to create pellets from iron ore fines.