Method for increasing sludge anaerobic fermentation hydrogen yield by using calcium hypochlorite
A technology of sludge anaerobic fermentation and calcium hypochlorite, applied in fermentation, oxidation treatment of sludge, biological sludge treatment and other directions, can solve problems such as hindering large-scale application, slow hydrogen production rate, and low hydrogen production.
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Embodiment 1
[0029] (1) In a plexiglass reactor with a working volume of 1 L, add the excess sludge that has been filtered, settle at 4°C for 1 day, remove the supernatant, and obtain the raw material for anaerobic fermentation (that is, the concentrated sludge sample ).
[0030] (2) Add 0.2g / L calcium hypochlorite to the reactor, stir evenly to fully disperse and dissolve it. Thereafter, nitrogen was filled into the reactor for 3 minutes to create an oxygen-free environment, and after sealing, the reactor was placed in a constant temperature shaker to carry out anaerobic fermentation reaction. Under the action of various functional microorganisms in the sludge, the organic matter in it is converted into hydrogen. The entire anaerobic fermentation process lasted for 10 days, during which the temperature was controlled at 35±1°C, the stirring speed was 150rpm, and the cumulative hydrogen production was 2.65mL / g VSS.
Embodiment 2
[0032] (1) In a plexiglass reactor with a working volume of 1 L, add the excess sludge that has been filtered, settle at 4°C for 1 day, remove the supernatant, and obtain the raw material for anaerobic fermentation (that is, the concentrated sludge sample ).
[0033] (2) Add 0.4g / L calcium hypochlorite to the reactor, stir evenly to fully disperse and dissolve it. Thereafter, nitrogen was filled into the reactor for 3 minutes to create an oxygen-free environment, and after sealing, the reactor was placed in a constant temperature shaker to carry out anaerobic fermentation reaction. Under the action of various functional microorganisms in the sludge, the organic matter in it is converted into hydrogen. The entire anaerobic fermentation process lasted for 10 days, during which the temperature was controlled at 35±1°C, the stirring speed was 150rpm, and the cumulative hydrogen production was 5.13mL / g VSS.
Embodiment 3
[0035] (1) In a plexiglass reactor with a working volume of 1 L, add the excess sludge that has been filtered, settle at 4°C for 1 day, remove the supernatant, and obtain the raw material for anaerobic fermentation (that is, the concentrated sludge sample ).
[0036] (2) Add 0.6g / L calcium hypochlorite to the reactor, stir evenly to fully disperse and dissolve it. Thereafter, nitrogen was filled into the reactor for 3 minutes to create an oxygen-free environment, and after sealing, the reactor was placed in a constant temperature shaker to carry out anaerobic fermentation reaction. Under the action of various functional microorganisms in the sludge, the organic matter in it is converted into hydrogen. The entire anaerobic fermentation process lasted for 10 days, during which the temperature was controlled at 35±1°C, the stirring speed was 150rpm, and the cumulative hydrogen production was 7.47mL / g VSS.
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