The Influence of Acid and Cooking Methods on The Quality of Fish Meal Processed from by-products of Catfish Fillet Processing oleh Theresia Dwi Suryaningrum, Ellya Ellya, Fateha Fateha, Natalia Prodiana Setiawati, Indri Mardiyana, Agus Supriyanto, Nurhayati Nurhayati, Giyatmi Giyatmi