Optimalisasi Produksi Biogas Melalui Penambahan Trace metals (Mo dan Zn) dengan Pemanfaatan Kotoran Sapi, Eceng Gondok (Eichhornia Crassipes) dan Sampah Organik pada Digester Batch Reactor

Naufal Arhab; Mohamad  Mirwan; M. Abdus Salam Jawwad; Maroeto

Authors

Naufal Arhab Universitas Pembangunan Nasional Veteran Jawa Timur Author
Mohamad Mirwan Universitas Pembangunan Nasional Veteran Jawa Timur Author
M. Abdus Salam Jawwad Universitas Pembangunan Nasional Veteran Jawa Timur Author
Maroeto Universitas Pembangunan Nasional Veteran Jawa Timur Author

Keywords:

Biogas, trace metals, Molybdenum, seng, eceng gondok, kotoran sapi, Rasio C/N, CH4

Abstract

Biogas production is now a practical solution to deal with organic waste while providing an environmentally friendly alternative energy source. This study was conducted to optimize biogas production by adding trace metals, namely molybdenum (Mo) and zinc (Zn), to a mixture of water hyacinth, fruit waste, and cow dung. The anaerobic fermentation process took place in a batch reactor for 35 days with four treatments: control without metals, addition of Mo 5 mg/kg, Zn 5 mg/kg, and a combination of Mo+Zn at 2.5 mg/kg each. Various parameters were measured, such as biogas volume and pressure, methane content (CH₄), carbon to nitrogen ratio (C/N), pH, temperature, and flame duration.The results showed that the addition of trace metals, especially the combination of Mo and Zn, significantly increased the amount and quality of biogas produced. The highest biogas volume was obtained in the treatment with Zn, while the best methane content appeared in the Mo+Zn combination. In addition, these trace metals help maintain pH stability and accelerate the active phase of fermentation. An ideal C/N ratio also supports the efficiency of methane production. In other words, the addition of these micro-nutrients strengthens the work of methanogenic bacteria and accelerates the conversion of organic matter into renewable energy.

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