Wastewater treatment method capable of realizing sulfur synergy denitrification simultaneous nitrogen and phosphorous removal
A technology for simultaneous denitrification and phosphorus removal, and wastewater treatment. It can be used in anaerobic digestion and other directions to solve problems such as increased treatment costs, accumulation of nitrite, and difficulty in controlling the production of elemental sulfur, resulting in low sludge yield and high treatment efficiency. Effect
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Embodiment 1
[0043] (1) Start the reaction device:
[0044] ①Start the first stage: Add 10L of anaerobic activated sludge mud-water mixture (collected from Hong Kong Shatin Sewage Treatment Plant) with an initial sludge concentration of 5.98g SS / L into the batch activated sludge reactor, and remove the upper After clear liquid 5L, enter 5L synthetic waste water (its component content is shown in Table 1) and carry out sludge domestication, improve its microbial activity simultaneously with the environment that domesticated microorganisms adapt to the presence of phosphate; Described synthetic waste water contains carbon source, sulfur source As well as the phosphorus source, the carbon source is provided by sodium acetate; the initial concentration of acetate in the synthetic wastewater is 150mg C / L; the sulfur source is provided by sodium sulfate, and the initial concentration of sulfate in the synthetic wastewater is 200mg S / L, the phosphorus source is provided by dipotassium hydrogen pho...
Embodiment 2
[0055] (1) The start-up of reaction device is with reference to embodiment 1;
[0056] (2) The strengthening of sulfur synergistic denitrification denitrification and phosphorus removal microorganisms refers to Example 1;
[0057] (3) Stable operation of wastewater treatment system:
[0058] Using artificially synthesized wastewater (Table 1) as the influent, the conditions for stable operation are: use mechanical agitation, the agitator is a standard four-leaf helical type, the agitation speed is maintained at 400rpm, the reaction temperature is 10°C, the pH of the influent water is 7, and the hydraulic retention is The time is 48 hours; among them, the period of anaerobic phosphorus release is 10 hours, and the period of anoxic phosphorus absorption is 14 hours. In the stage of anoxic phosphorus absorption, potassium nitrate is added, and the concentration of potassium nitrate in the reactor is maintained at 20mg N / L , After the whole process, the removal rate of acetate, n...
Embodiment 3
[0060] (1) The start-up of reaction device is with reference to embodiment 1;
[0061] (2) The strengthening of sulfur synergistic denitrification denitrification and phosphorus removal microorganisms refers to Example 1;
[0062] (3) Stable operation of wastewater treatment system:
[0063] Using artificially synthesized wastewater (Table 1), the conditions for stable operation are: using mechanical stirring, the stirring blade is a standard four-leaf helical type, the stirring speed is maintained at 400rpm, the reaction temperature is 20°C, the pH of the influent is 7, and the hydraulic retention time is 17h; Among them, the anaerobic phosphorus release stage time is 5h, the anoxic phosphorus uptake stage time is 3.5h, potassium nitrate is added in the anoxic phosphorus uptake stage, and the concentration of potassium nitrate in the reactor is maintained at 20mg N / L after the addition, the whole After the process, the removal rate of acetate and nitrate can reach 100%, and ...
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