Effectiveness Analysis of Anaerobic Digestion Method in Making Biogas from Animal Manure and Tofu Liquid Waste

Siswo Sumardiono,Abdullah Abdullah,Fahmi Arifan

doi:10.21776/ub.jitek.2021.016.02.2

Siswo Sumardiono, Abdullah Abdullah + Show 1 more

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https://doi.org/10.21776/ub.jitek.2021.016.02.2

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Abstract

Organic waste has high COD and BOD content, so it is dangerous if disposed of directly into the environment. Organic waste processing, such as waste from livestock manure and liquid tofu waste, requires a process that can reduce COD and BOD levels as well as produce valuable products. Anaerobic digestion method is the proper process to convert complex compounds in waste into simpler compounds with methanogenic bacteria into a renewable energy product, namely biogas. On the other hand, the anaerobic digestion process can reduce COD and BOD levels in the biogas formation process. This study uses raw materials such as cow manure and chicken manure, and liquid tofu waste. The variables that produced the largest biogas were those with a ratio of 70% cow dung, 15% chicken manure, and 15% tofu liquid waste with a total of 3,251.5 mL. Then, the COD and BOD levels decreased significantly with more than 98% COD removal, and more than 95% BOD removal in all variables at the end of the anaerobic digestion process.

Highlights

The energy crisis in this world requires us to innovate in creating renewable energy that is effective and environmentally friendly (Luz et al, 2017)
One type of raw material used for biogas production is tofu liquid waste which comes from the by-product of the tofu industrial production process
The starter prepared as much as 200 mL, the raw materials for tofu liquid waste and livestock manure are added, and variables are made as shown in table 1

Summary

Introduction

The energy crisis in this world requires us to innovate in creating renewable energy that is effective and environmentally friendly (Luz et al, 2017). Biogas production depends on raw material and the processing method used (Sanjaya, 2015). One type of raw material used for biogas production is tofu liquid waste which comes from the by-product of the tofu industrial production process. Tofu liquid waste is hazardous if disposed of directly into the environment because it contains high COD and BOD values (Budiyono and Syaichurrozi, 2020). Tofu liquid waste contains high organic and nutritional substances, making it suitable for processing into biogas using the anaerobic digestion method. If the tofu liquid waste is discharged directly to the water bodies, some problems will occur. Apart from tofu waste, another raw material that has been widely studied is waste from livestock manure (Sanjaya, 2015).

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