Tepung bulu

Tepung bulu adalah produk sampingan dari pengolahan unggas; terbuat dari bulu unggas yang digiling sebagian di bawah panas dan tekanan tinggi, lalu digiling ulang dan dikeringkan. Meskipun kadar nitrogen total cukup tinggi (sampai 12%), bioavailabilitas nitrogen ini mungkin rendah. Tepung bulu digunakan dalam pakan ternak yang diformulasikan, dan pupuk organik .

Di seluruh dunia, sekitar 50 miliar ayam digunakan untuk konsumsi manusia pada tahun 2014. [1] Tepung bulu dibuat melalui proses yang disebut rendering. Kompor bertekanan uap dengan suhu lebih dari 140 °C (284 °F) digunakan untuk "memasak" dan mensterilkan bulu. Tahap ini menghidrolisis sebagian protein, menyebabkan denaturasinya. Kemudian mereka dikeringkan, didinginkan, dan digiling menjadi bubuk untuk digunakan sebagai sumber nitrogen untuk pakan ternak (kebanyakan ruminansia) atau sebagai bahan pembenah tanah organik.

Mengandung nitrogen hingga 12%, tepung bulu merupakan sumber pupuk organik lepas lambat dengan kandungan nitrogen tinggi untuk kebun organik. Tepung bulu tidak larut dalam air dan tidak bisa menjadi pupuk cair yang baik. Tepung bulu dapat digunakan untuk:

  • Meningkatkan pertumbuhan daun hijau
  • Mengaktifkan penguraian kompos
  • Memperbaiki struktur tanah

Saat menambahkannya ke kebun sebagai sumber nitrogen, ia harus dicampur ke dalam tanah untuk memulai penguraian agar senyawa nitrogen tersedia bagi tanaman. Sebagai pupuk organik, pupuk ini tidak berbahan dasar sintetis atau minyak bumi.

Masalah

Sebuah studi tahun 2012 menemukan bahwa penggunaan tepung bulu dapat berkontribusi terhadap paparan arsenik pada manusia. [2]

Referensi

  1. ^ "How many animals we eat each year". World Economic Forum. 8 Feb 2019. 
  2. ^ Nachman, K. E.; Raber, G.; Francesconi, K. A.; Navas-Acien, A.; Love, D. C. (2012-02-15). "Arsenic species in poultry feather meal". The Science of the Total Environment. 417-418: 183–188. Bibcode:2012ScTEn.417..183N. doi:10.1016/j.scitotenv.2011.12.022. ISSN 1879-1026. PMID 22244353. 

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