Effect of Additional Sources of Carbon and Nitrogen in Liquid Waste of Dairy Cows on The Quality of Organic Soil Conditioner
Wahyu Suradi Pranata (a), Eulis Tanti Marlina (b), Yuli Astuti (b), Ellin Harlia (*b)

a) Postgraduate Study Program, Faculty of Animal Husbandry, Padjadjaran University, Sumedang, Indonesia
b) Faculty of Animal Husbandry, Padjadjaran University, Sumedang, Indonesia
*ellin.harlia[at]unpad.ac.id

Abstract

Studies on the processing of dairy farm wastewater have been carried out using samples from liquid waste storage ponds. The purpose of this study is to process liquid waste by fermentation to become a liquid organic soil conditioner in accordance with Ministerial Decree of Agriculture No. 261 of 2019 concerning Minimum Technical Requirements for Organic Fertilizers, Bio Fertilizers and Soil Conditioner. Organic soil conditioner can be used as soil fertilizer, by way of land application. Liquid organic soil conditioner can be obtained by fermenting liquid waste coupled with C-organic including milk sludge and silage fluid starter. The results of fermentation for 21-28 days showed that the content in C-organic liquid waste was close to 10, pH, heavy metal content, micronutrients, and negative E. coli and Salmonella bacteria had met the requirements of the standard of Ministerial Decree of Agriculture No. 261 of 2019.

Keywords: liquid waste, dairy cows, carbon sources, nitrogen sources, organic soil conditioner

Topic: Animal Waste and Environmental Technology