Increase of Silica Recovery by Lignocellulose-degrading Enzyme Complex from Cow Rumen Fluid in a Reactive Extraction of Oryza sativa L. Husk

Muhammad Rizki Fajar Ilhamy,Khairul Hadi Burhan,Robert Manurung

doi:10.5614/3bio.2020.2.2.4

Muhammad Rizki Fajar Ilhamy, Khairul Hadi Burhan + Show 1 more

Open Access

https://doi.org/10.5614/3bio.2020.2.2.4

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Abstract

Silica is one of the beneficial nutrients and has various essential roles to cope with stresses situation in the graminaceous plant. The availability of Si on earth is abundant however the form that can be readily uptake by the plant is limited, and without external addition, the silica content in the cultivated land would be depleted and decreasing plant growth, recycle Si from the decaying plant is a better alternative to protect from that situation. Rice husk is a leftover paddy by-product having significant Si content that can be reused. This study offered a biological way to treat the rice husk using rumen fluid as a better alternative to the high energy consuming thermal procedure. Rice husk was macerated in rumen fluid, the kinetic and model of lignocellulose degradation were evaluated. The study in Si release in liquid media i.e. 0.05 M hydrochloric acid, 0.1 citric acid and aquades, and Si extraction in alkaline solution 1 M KOH using the rumen-treated husk showed that this method could be a better alternative to develop high Si content of solid and liquid fertilizer, respectively.

Highlights

Silicon (Si) has various essential roles in graminaceous plants i.e. wheat, paddy, corn, etc
The experiments focused on husk lignocellulose degradation in variation of time, and the rumen-treated result was compared to the husk char with a certain amount of carbon content
2.2.1.Husk char synthesis The rice husk of 10 g in a lid covered chamber was placed in the furnace

Summary

Introduction

Silicon (Si) has various essential roles in graminaceous plants i.e. wheat, paddy, corn, etc. Its existence is found to relieve several forms of biotic and abiotic stresses. Studies reported that Si provides a mechanical barrier through the deposition in non-soft tissue as protection from insects and pathogens, and as a chemical inducer i.e. alters the presence level of herbivore-induced plant volatiles compound [1]. It increases the tolerance of salt concentration, protects from the oxidative stress damage, and reduce the inhibitory effect of Na+ [3]. The silicon soil amendment succeeds to increase the yield and supresses the diseases in paddy due to the thickening in the epidermal layer to reduce palatability and digestibility in the pests and stimulation of insects-resistance biochemical pathway [4]

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