Fermentation tank and dry anaerobic fermentation system and method including same for co-processing municipal solid waste and municipal sludge
An anaerobic fermentation and fermentation tank technology, applied in the field of fermentation engineering, can solve the problems of low gas production potential and gas production quality of the system, unreasonable nutritional structure of digestive flora, low volume load of the reactor, etc., so as to save construction. cost, increased gas production potential, and the effect of appropriate material selection
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Embodiment 1
[0162]1. The first round of fermentation
[0163] 1. System establishment:
[0164] At the beginning of the establishment of the system, with the goal of cultivating the digestive flora, the initial reaction materials are uniformly mixed in the mixing and feeding system and then poured into the fermenter for fermentation (the filling factor is about 30%).
[0165] The initial reaction material contains fresh cow dung, municipal sludge and mature straw; its mass ratio is 35:55:10, and its moisture content is 50% to 60%;
[0166] Wherein, the preparation method of the stalk after described ripening is:
[0167] After the corn stalks or corn miscellaneous are crushed, they are mixed with the decomposing bacteria agent. The mass ratio of the decomposing bacterial agent to the corn stalk or corn is 0.002-0.003:1;
[0168] The microbial agent is composed of a comprehensive bacterial group of thermophilic and heat-resistant bacteria, fungi and actinomycetes that can strongly decom...
Embodiment 2
[0189] Consistent with Example 1, the only difference is that in the fermentation cycle stage, the mature straw is added when the VFA rises in the acidification stage.
[0190] The mass ratio of the mature straw to the fermented material in the fermenter is 1: (3-5).
[0191] Adding the mature straw at this time is equivalent to the role of fermentation additives, mainly to adjust the structure of the flora and stabilize the carbon-nitrogen ratio (C / N) of the system; the digestive system is greatly affected by the concentration of ammonia nitrogen, when ammonia nitrogen (NH 3 + NH 4 + ) when the concentration reaches 3000mg / l~4000mg / l, it will inhibit methanogens and acetogens, accumulate propionic acid, increase the acidity of the environment, and eventually cause the system to stagnate. The introduction of additives optimizes the quantity and quality of the leading bacteria in the system, greatly improving the tolerance and stability of the leading bacteria and bacterial ...
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