Enhancement of Biogas Production from Rice Husk by NaOH and Enzyme Pretreatment

Syafrudin Syafrudin,Budiyono Budiyono,Shandy Sarima Agnesia,Hashfi Hawali Abdul Matin,Winardi Dwi Nugraha,Hadiyanto Hadiyanto,Sudarno Sudarno,Maryono Maryono

doi:10.1051/e3sconf/20183102002

Abstract

Biogas is a renewable energy source that can be used as an alternative fuel to replace fossil fuel such as oil and natural gas. This research aims to analyze the impact of NaOH (Sodium hydroxide) and enzyme usage on the production of rice husk biogas using Solid State Anaerobic Digestion (SS-AD). Generally, SS-AD occurs at solid concentrations higher than 15%. The waste of rice husk are used as substrate with a C/N ratio of 25% and the total of solid that are used is 21%. Rice husk contains high lignin, therefore it is handled with chemical and biological treatment. The chemical preliminary treatment was using NaOH with various concentrations from 3%, 6% and 9% while the biological preliminary treatment was using enzyme with various concentration from 5%, 8%, and 11%. The biogas that is produced then measured every two days during 60 days of research with the biogas volume as a parameter observed. The result of the research shows that preliminary treatment with NaOH and enzyme can increase the production of biogas. The highest biogas production was obtained by the NaOH pretreatment using 6% NaOH which was 497 ml and by enzyme pretreatment using 11% enzyme which was 667,5 ml.

Highlights

Energy has become a principal needs to modern society nowadays The need of energy use is increasing along with population growth and the increasing consumption of society, as they use a wide range of tools and equipment to ease their life [1]
That policy highlights on the matter of energy source that can be renewable as an alternative to fossil fuel
Biogas is a renewable energy that is able to be used as an alternative fuel to replace fuels that are originated from fossil such as petrol and natural gas [4]

Summary

Introduction

Energy has become a principal needs to modern society nowadays The need of energy use is increasing along with population growth and the increasing consumption of society, as they use a wide range of tools and equipment to ease their life [1]. One of the ways to save oil fuel and other unrenewable energy is to find another alternative that can be renewable [3]. To lessen the dependency for oil fuel, the government has established the presidential decree of Republic of Indonesia number 5 year 2006 on the issue of developing an alternative energy source as a replacement of fuel oil, microbial consortium and pretreatment. That policy highlights on the matter of energy source that can be renewable as an alternative to fossil fuel. Biogas is a renewable energy that is able to be used as an alternative fuel to replace fuels that are originated from fossil such as petrol and natural gas [4]. Biogas is one of a bioenergy that could be define as a gas that is released when organic materials such as human waste, manure, straw, rice husk and leaves from sorted out vegetables that are fermented or under a process called methanisation [5]

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Conclusion