One-step temperature-rising starting method for high-temperature anaerobic digestion reaction of sludge
A high-temperature anaerobic and anaerobic digestion technology, applied in biological sludge treatment and other directions, can solve the problems of long time consumption and low treatment efficiency, and achieve the effect of shortening the start-up period, shortening the culture period and improving the start-up efficiency.
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Embodiment 1
[0024] Adjust the solid content of the raw mud to 20g / L, then transfer it to the anaerobic reactor and preheat it to 35°C, inoculate 8% (volume ratio) of the medium-temperature anaerobic digestion seed mud with a solid content of 20g / L, and mix uniform. Add an appropriate amount of bioaccelerator and buffer group and medicament to the mixed mud, specifically including: iron powder 1g / L with a particle size of 0.015mm; 600mg / LNaHCO 3 ; Biological carrier with a filling rate of 5%. After mixing evenly, seal the anaerobic reactor to keep the system in an anaerobic state. The temperature of the system was raised to a high temperature of 55°C by one-step heating start-up method and the temperature was kept relatively stable. After 32 days of digestion, the biogas production in the system was stable and the acid concentration was maintained at a low level, and the start-up process of high-temperature anaerobic digestion was completed.
Embodiment 2
[0026] Adjust the solid content of the raw mud to 35g / L, then transfer it to the anaerobic reactor and preheat it to 35°C, inoculate 10% (volume ratio) of the medium-temperature anaerobic digestion seed mud with a solid content of 30g / L, and mix uniform. Add an appropriate amount of bioaccelerator and buffer group and medicament to the mixed mud, specifically including: 5g / L of iron powder with a particle size of 0.045mm; 1000mg / LNaHCO 3 ; Biological carrier with a filling rate of 5%. After mixing evenly, seal the anaerobic reactor to keep the system in an anaerobic state. The temperature of the system was raised to a high temperature of 55°C by one-step heating start-up method and the temperature was kept relatively stable. After 28 days of digestion, the biogas production in the system was stable and the acid concentration was maintained at a low level, and the start-up process of high-temperature anaerobic digestion was completed.
Embodiment 3
[0028] Adjust the solid content of the raw mud to 35g / L, then transfer it to the anaerobic reactor and preheat it to 35°C, inoculate 12.5% (volume ratio) of the medium-temperature anaerobic digestion seed mud with a solid content of 30g / L, and mix uniform. Add an appropriate amount of bioaccelerator and buffer group and medicament to the mixed mud, specifically including: iron powder 10g / L with a particle size of 0.15mm; 1200mg / L NaHCO 3 ; Biological carrier with a filling rate of 10%. After mixing evenly, seal the anaerobic reactor to keep the system in an anaerobic state. The temperature of the system was raised to a high temperature of 55°C by one-step heating start-up method and the temperature was kept relatively stable. After 21 days of digestion, the biogas production in the system was stable and the acid concentration was maintained at a low level, and the start-up process of high-temperature anaerobic digestion was completed.
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