Method for strengthening anaerobic organism phosphorus removal of waste water

Abstract

The invention discloses a method for strengthening anaerobic organism phosphorus removal of waste water. The method comprises the following steps: adding exogenous medicaments such as Na2S2O5 and / or Na2SO3 into phosphorus-containing waste water, mixing uniformly, adjusting the pH value of the waste water to be 6.0 to 8.0, carrying out an anaerobic digestion reaction at the temperature of 15 to 45DEG C, releasing hydrogen phosphide from total phosphorus inside the waste water under the metabolism effect of anaerobic microorganisms so as to be removed from a water body, so that the load of thetotal phosphorus entering an aerobiotic stage in the waste water biochemical treatment system is obviously reduced. The method is simple and practicable, and is obvious in phosphorus removal effect.

Description

technical field

[0001] The invention relates to a method for anaerobic biological phosphorus removal of wastewater, in particular to a method for strengthening anaerobic biological phosphorus removal of wastewater by adding exogenous medicaments, and belongs to the technical field of wastewater biological treatment. Background technique

[0002] At present, eutrophication has caused serious negative impacts on natural water bodies, such as "algae blooms" in lakes and "red tides" in coastal waters, which occur from time to time and become more severe, which not only endangers agriculture, fishery, tourism and many other industries, but also affects the sanitation of drinking water. and food safety constitute a huge threat. Phosphorus is the main limiting substance that causes eutrophication in water. Only when the concentration of phosphorus in water is high, nitrogen is the limiting substance. It can be seen that the effective removal of phosphorus in wastewater is far more...

Examples

Embodiment 1

[0016] Put 1.5L of filtered domestic sewage into a biochemical reactor with an effective volume of 3L, and inoculate the anaerobic pool sludge of the urban sewage treatment plant. The concentration of the mixed liquid sludge in the reactor is 3120mg / L, and the total phosphorus content is 435mg / L; Two groups of parallel experiments were set up, one of which was dosed with exogenous agent Na 2 S 2 o 5 , the dosage is 0.7g / L, Na is added to the reactor at one time 2 S 2 o 5 Finally, stir and mix well, and adjust the pH value of the mixture to 7.0, feed nitrogen to make the dissolved oxygen content in the reactor 0.01mg / L, and then close the reactor; The pH value of the mixture was 7.0, and the dissolved oxygen content in the reactor was 0.01 mg / L after nitrogen gas was introduced for 3 minutes, and the reactor was closed; both sets of reactors were placed in a constant temperature water bath at 15°C for anaerobic digestion for 144 hours; the reactor was shaken, Take an appr...

Embodiment 2

[0018] Put 1.5L of filtered domestic sewage into a biochemical reactor with an effective volume of 3L, and inoculate the anaerobic pool sludge from the urban sewage treatment plant. The mixed liquid sludge concentration in the reactor is 14580mg / L, and the total phosphorus content is 2247mg / L; Two groups of parallel experiments were set up, one of which was dosed with exogenous agent Na 2 S 2 o 5 , the dosage is 1.3g / L, add in 2 times and mix well, adjust the pH value of the mixture to 8.0, and pass nitrogen gas to make the dissolved oxygen content in the reactor 0.05mg / L, and put it in a constant temperature water bath at 25°C Under the condition of anaerobic digestion for 120h, the rest of the operation process is the same as in Example 1; the blank control group does not add exogenous medicaments, and the environmental conditions such as digestion time and temperature are the same as those of the test group; the total phosphorus removal rate of the blank control group is ...

Embodiment 3

[0020] Put 1.5L of filtered domestic sewage into a biochemical reactor with an effective volume of 3L, and inoculate the anaerobic pool sludge of the urban sewage treatment plant. The concentration of the mixed liquid sludge in the reactor is 4330mg / L, and the total phosphorus content is 648mg / L; Two groups of parallel experiments were set up, one of which was dosed with exogenous agent Na 2 SO 3 , the dosage is 1.5g / L. After one-time dosing, adjust the pH value of the mixture to 8.0, and feed nitrogen to make the dissolved oxygen content in the reactor 0.1mg / L. Oxygen digestion was performed for 100 hours, and the rest of the operation process was the same as in Example 1; the blank control group did not add exogenous agents, and the environmental conditions such as digestion time and temperature were the same as those of the test group. The removal rate of total phosphorus in the blank control group was 0.3%, and the removal rate of total phosphorus in the test group added...

technical field

[0001] The invention relates to a method for anaerobic biological phosphorus removal of wastewater, in particular to a method for strengthening anaerobic biological phosphorus removal of wastewater by adding exogenous medicaments, and belongs to the technical field of wastewater biological treatment. Background technique

[0002] At present, eutrophication has caused serious negative impacts on natural water bodies, such as "algae blooms" in lakes and "red tides" in coastal waters, which occur from time to time and become more severe, which not only endangers agriculture, fishery, tourism and many other industries, but also affects the sanitation of drinking water. and food safety constitute a huge threat. Phosphorus is the main limiting substance that causes eutrophication in water. Only when the concentration of phosphorus in water is high, nitrogen is the limiting substance. It can be seen that the effective removal of phosphorus in wastewater is far more...

Examples

Embodiment 1

[0016] Put 1.5L of filtered domestic sewage into a biochemical reactor with an effective volume of 3L, and inoculate the anaerobic pool sludge of the urban sewage treatment plant. The concentration of the mixed liquid sludge in the reactor is 3120mg / L, and the total phosphorus content is 435mg / L; Two groups of parallel experiments were set up, one of which was dosed with exogenous agent Na 2 S 2 o 5 , the dosage is 0.7g / L, Na is added to the reactor at one time 2 S 2 o 5 Finally, stir and mix well, and adjust the pH value of the mixture to 7.0, feed nitrogen to make the dissolved oxygen content in the reactor 0.01mg / L, and then close the reactor; The pH value of the mixture was 7.0, and the dissolved oxygen content in the reactor was 0.01 mg / L after nitrogen gas was introduced for 3 minutes, and the reactor was closed; both sets of reactors were placed in a constant temperature water bath at 15°C for anaerobic digestion for 144 hours; the reactor was shaken, Take an appr...

Embodiment 2

[0018] Put 1.5L of filtered domestic sewage into a biochemical reactor with an effective volume of 3L, and inoculate the anaerobic pool sludge from the urban sewage treatment plant. The mixed liquid sludge concentration in the reactor is 14580mg / L, and the total phosphorus content is 2247mg / L; Two groups of parallel experiments were set up, one of which was dosed with exogenous agent Na 2 S 2 o 5 , the dosage is 1.3g / L, add in 2 times and mix well, adjust the pH value of the mixture to 8.0, and pass nitrogen gas to make the dissolved oxygen content in the reactor 0.05mg / L, and put it in a constant temperature water bath at 25°C Under the condition of anaerobic digestion for 120h, the rest of the operation process is the same as in Example 1; the blank control group does not add exogenous medicaments, and the environmental conditions such as digestion time and temperature are the same as those of the test group; the total phosphorus removal rate of the blank control group is ...

Embodiment 3

[0020] Put 1.5L of filtered domestic sewage into a biochemical reactor with an effective volume of 3L, and inoculate the anaerobic pool sludge of the urban sewage treatment plant. The concentration of the mixed liquid sludge in the reactor is 4330mg / L, and the total phosphorus content is 648mg / L; Two groups of parallel experiments were set up, one of which was dosed with exogenous agent Na 2 SO 3 , the dosage is 1.5g / L. After one-time dosing, adjust the pH value of the mixture to 8.0, and feed nitrogen to make the dissolved oxygen content in the reactor 0.1mg / L. Oxygen digestion was performed for 100 hours, and the rest of the operation process was the same as in Example 1; the blank control group did not add exogenous agents, and the environmental conditions such as digestion time and temperature were the same as those of the test group. The removal rate of total phosphorus in the blank control group was 0.3%, and the removal rate of total phosphorus in the test group added...