SAO PAULO, Sept 11 (Reuters) - Brazil's total beef exports in August rose by 34 percent year-on-year both by volume and in revenue terms, industry group Abiec said on Monday, indicating the worst of a food safety scandal that rocked Brazil's protein industry may be over. Abiec said Brazil shipped 145,822 tonnes of fresh and processed beef in the period, generating revenues of $607 million, the highest...