Hello Freinds and Guide
I am doing experiment of production of biogas using vegetablefood waste+ lignocellulosic waste. I wanted to know which additional nutrients/ supplements should to added in order to increase yield of methane production? Also since i want to scale up for home based biogas production, what are the source for it
for e.g. if i need to magnesium, i dont want to add magensium salt but any natural source of magnesium.
ThanK you
A lot of plants use manure. It enhances process stability due to high buffer capacity and contains anorganic nutrients.
Another natural source of Mg might be wood ash.
Hi Mustafa,
Two type of methane enhancement, firstly methane content, secondly methane production rate. If you wan to get this higher yield, so many factors can influence the biogas yield such as, COD, BOD, TSS, VS, OLR, HRT etc. Also pH, temperature, digester design etc.
If you want to add Mg, this mean not enough to support the whole process. Mg is mineral for microorganism. You can find others mineral or replace Mg such as Ca. Ca(OH)2 is cheaper and easy to get it. What I have experienced, this can reduce the H2S gas content in the produce biogas a lot, sometimes less than 20 ppm, not as 2000 ppm as a common biogas production. You can try it.
For me, in pilot scale biodigester, don''t add others component, this can reflect later in the cost of production in large scale later. You try to find natural material or waste product to enhance the process. Others thing, don''t forget, enzyme is also key role in biogas production. Please visit the website Zorg enzyme, how this enzyme can enhance the biogas production faster and higher yield.
The fermentation can be operated without any extra nutrients. Certainly, some supplements maybe improve the performance. Considering your object, I think you can increase the ratio of vegetable food waste in the substrate, or introduce other kitchen wastes, even the excrement.
Although anaerobic degradation of vegetable or food waste requires no external supplements yet urea works well in the multiplication of anaerobic microflora and hence helps in methane enhancement
If you are using food waste, it will contain all the nutrients required for biogas production. Anyhow if you still need some literature about media for biomethane potential experiments check these two:
Development of membrane inlet mass spectrometry for examination of fermentation processes
http://www.sciencedirect.com/science/article/pii/S0039914010007484
Assessment of the anaerobic biodegradability of macropollutants
http://link.springer.com/article/10.1007%2Fs11157-004-2502-3
Supplements for to improve the alcalinity of the system, because food are easily biodegradable matter and tend to acidification.
- Badges
- Science topic
- Similar topics
- Physical Sciences
- Energy
- Energy-Generating Resources
- Renewable Energy