Petronet LNG Ltd, India’s largest liquefied natural gas importer, on Monday reported a 9 per cent rise in the September quarter consolidated net profit as margins rose. It posted a consolidated net profit of Rs 855.74 crore, or Rs 5.70 per share, in July-September compared with Rs 785.73 crore, or Rs 5.24 a share, earning in the same period a year ago, according to a company’s stock exchange filing.