MADRID - Spanish engineering and renewable energy company Abengoa posted on Friday a 5 percent rise in first-half net profit to 72 million euros ($80 million). Class B shares in Abengoa - which has biofuel and solar thermal plants in the United States - have dropped 16 percent since July 23 on concerns over its liquidity. The company is expected to provide more information at a conference call at 1600 GMT. ($1 = 0.9055 euros)