%A 1517011085 Yumainismar
%T BIODEGRADASI LIMBAH BULU AYAM OLEH KONSORSIUM 
BAKTERI ISOLAT LOKAL
%X Chiken feather waste has potential to be used as animal feed, because it?s a high 
protein content. Protein contained in chicken feather waste is keratin. The high 
stability and low degradation rate of keratin protein become obstacles in the 
utilization of chicken feather waste. Chicken feather waste is able to be 
decomposed by keratinolytic microorganism. The aimed of this research was to 
determine the ability of local isolate bacteria to degrade chicken feather waste and 
to measure the level of released amino acid after degradation process. The 
biodegradability test of chicken feather waste was carried out for 12 days. The 
determination of optimum pH for degradation was observed in variation pH 7.0, 
7.5, and 8.0. The released amino acid was measured from the filtrate after the 
degradation process. The largest percentage of degradation was shown by a 
bacterial consortium compared with the single isolate. At the optimum pH i.e. pH 
7.5, percent degradation of chicken feather waste was 70.04%, and 580.46 ppm of 
amino acids were released. 
 
Keywords: Biodegradation, Chicken Feather Waste, Keratin, Bacteria 
 Consortium, Amino Acid. 

Limbah bulu ayam berpotensi untuk dimanfaatkan sebagai pakan ternak, karena 
memiliki kandungan protein yang tinggi. Protein yang terkandung dalam limbah 
bulu ayam adalah keratin. Kestabilan yang tinggi dan tingkat degradasi yang 
rendah dari protein keratin, menjadi kendala dalam pemanfaatan limbah bulu 
ayam tersebut. Limbah bulu ayam dapat terurai dengan bantuan mikroorganisme 
keratinolitik. Tujuan penelitian ini adalah mengetahui kemampuan bakteri isolat 
lokal dalam mendegradasi limbah bulu ayam dan mengukur kadar asam amino 
yang dibebaskan setelah proses degradasi. Uji biodegradabilitas limbah bulu 
ayam dilakukan selama 12 hari. Penentuan pH optimum degradasi diamati pada 
variasi pH 7,0, 7,5, dan 8,0. Kadar asam amino yang dibebaskan diukur dari 
filtrat setelah proses degradasi. Presentase degradasi terbesar ditunjukkan oleh 
konsorsium bakteri dibandingkan dengan isolat tunggal. Pada pH optimum yaitu 
pH 7,5, persen degradasi limbah bulu ayam diperoleh sebesar 70,04%, dan 
sebanyak 580,46 ppm asam amino dibebaskan. 
Kata kunci: Biodegradasi, Limbah Bulu Ayam, Keratin, Konsorsium Bakteri, 
Asam Amino. 


%C UNIVERSITAS LAMPUNG
%D 2019
%I Fakultas Matematika dan Ilmu Pengetahuan Alam
%L eprints57187