At the opening were Dr Ali Rabiei (Minister of Co-operation, Labor and Social Welfare), Dr Ali Roumi, managing director, of the parent Holding company, and the governor and executive directors of Lorestan province.
The plant has been built to create more than 30 new jobs and many more indirect jobs in Lorestan Province.
The company said the factory will receive 180 tonnes milk per day.
"I am proud of the important new investments we are making in Lorestan, Holding strategies are based on sustainable employment, along with admiration for respectable government policies," Dr Roumi said.
He added the company is going to open the Aligudarz animal husbandry complex with a capacity of 2,000 livestock units and a daily production of 80 tons of raw milk.
Pegah, which has 17 production facilities and five distribution companies throughout the country, makes a range of dairy products, including cheese, milk, doogh, yogurt, powder and cream.