waste water sewage biogas scrubber 1. Appropriate fermentation temperature
The temperature conditions of the digester can be divided into:
waste water sewage biogas scrubber 2. The temperature range of room temperature fermentation (also known as low temperature fermentation) is between 10 ºC and 30 ºC. At this temperature, the gas production can reach 0.15-0.3m3/m3. D
waste water sewage biogas scrubber 3. The medium temperature fermentation temperature is between 30 ºC and 45 ºC. At this temperature, the gas production capacity of the tank can reach about 1m3 / m3. D.
waste water sewage biogas scrubber 4.High temperature fermentation temperature 45 ºC ~ 60 ºC. At this temperature, the gas production of gas storage tank can reach 2-2.5m3/m3.
The economic temperature of biogas fermentation is 35 ºC, i.e. medium temperature fermentation.
The second is the proper concentration of fermentation liquid
The concentration range of fermentation broth is 2-30%. The higher the concentration, the greater the gas production. When the concentration of fermentation liquid is more than 20%, it is called dry fermentation.
waste water sewage biogas scrubber 5. The proportion of carbon and nitrogen in fermentation materials is suitable (C: n)
Biogas fermentation microorganism needs the most carbon, followed by nitrogen. We call the ratio of carbon to nitrogen required by microorganisms as the ratio of carbon to nitrogen, which is expressed as the ratio of carbon to nitrogen. At present, 25:1 is generally used, but it is not very strict. 20:1, 25:1, 30:1 can be fermented normally.
waste water sewage biogas scrubber 6.Suitable pH value
The pH value of biogas fermentation is between 6.5 and 7.5, which affects enzyme activity and fermentation rate.
waste water sewage biogas scrubber 7. Enough strains
The quantity of bacteria in biogas fermentation directly affects the output and quality of biogas. Generally, the total amount of liquid in fermentation raw materials is required to be 10-30% to ensure the normal start-up and vigorous biogas production.
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waste water sewage biogas scrubber
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