A method of improving municipal sludge dewatering performance under low temperature conditions
A technology of municipal sludge and dewatering performance, applied in sludge treatment, biological sludge treatment, dewatering/drying/concentrating sludge treatment, etc., can solve problems such as poor biological treatment effect of sludge, and achieve stable low temperature resistance performance. , the effect of improving dehydration performance
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Embodiment 1
[0033] A method for improving municipal sludge dewatering performance under low temperature conditions, the steps are as follows:
[0034] (1) Inoculate Thiobacillus ferrooxidans into the liquid 9K medium according to the amount of 10% of the medium, and carry out low-temperature acclimation culture at 10-15°C. When the pH of the bacterial solution drops to 1.5-2.0, use this bacterial solution as the bacteria 10% inoculum was inoculated into the liquid 9K medium, and the low-temperature acclimation culture was carried out again at 10-15°C; the above-mentioned inoculation-cultivation operation was repeated 7 times to obtain low-temperature-resistant Thiobacillus ferrooxidans;
[0035] (2) Inoculate Thiobacillus thiooxidans into the liquid Waksman medium according to the inoculum amount of 7% of the medium, and carry out low-temperature acclimatization culture at 10-15°C; when the pH of the bacteria solution drops to 1-1.5, use the bacteria solution as the bacteria species, inoc...
Embodiment 2
[0047] Step (1)-step (6) are the same as in Example 1. In step (7), acclimate and cultivate for 10 days.
[0048] (8) Inoculate the inoculum of composite bacteria into the 10 reaction pools of the dynamic reaction system. Each reaction pool is filled with sludge to be treated with a water content adjusted to 96.5%. The sludge is taken from A sewage treatment plant in Jinshui District, Zhengzhou City, has a solid content of 18% and an organic matter content (relative to the amount of dry sludge) of 47%. The inoculation amount is 8% of the sludge volume; add 9g / L of compound nutrients, and continuously aerate, the aeration amount per cubic meter of sludge is 4 Nm 3 / h; at a temperature of 10-15°C, biological treatment for 3 days.
[0049] The composition of the compound nutrient is as follows: S element content is 136 g / kg, dipotassium hydrogen phosphate content is 85 g / kg, humus soil content is 80 g / kg, ammonium citrate 50 g / kg, ferrous sulfate heptahydrate The content is 48...
Embodiment 3
[0054] Step (1)-step (6) are the same as in Example 1. In step (7), acclimate and cultivate for 14 days.
[0055] (8) Inoculate the inoculum of composite bacteria into the 10 reaction pools of the dynamic reaction system. Each reaction pool is filled with sludge to be treated with a water content adjusted to 98%. The sludge is taken from A sewage treatment plant in an industrial park in Hebi City has a solid content of 21% and an organic matter content (relative to the amount of dry sludge) of 45%. The inoculation amount is 8% of the sludge volume; add 6g / L of compound nutrients, and continuously aerate, the aeration amount per cubic meter of sludge is 2.5 Nm 3 / h; at a temperature of 10-15°C, biological treatment for 5 days.
[0056] The composition of the compound nutrient is as follows: S element content is 150 g / kg, dipotassium hydrogen phosphate content is 100 g / kg, humus soil content is 80 g / kg, ammonium citrate 40 g / kg, ferrous sulfate heptahydrate The content is 470...
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