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A technology for biological phosphorus removal and water inflow, which is applied in chemical instruments and methods, biological water/sewage treatment, water pollutants, etc.
Active Publication Date: 2017-09-01
青岛锦龙弘业环保有限公司
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[0009] In view of the problems existing in the background technology, in order to solve the problem that the sewage phosphorus removal process in the prior art cannot take into account the effect and the operating cost, the present invention proposes an enhanced biological phosphorus removal method, which has the advantages of good treatment effect, low energy consumption, and surplus Strong fertilizer efficiency and other advantages
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Embodiment 1
[0046] 1) The reactor is built using SBR reactor. The reactor is cylindrical, with a bottom diameter of 400cm, a height of 1200cm, and an effective volume of 125L. It runs in the order of water intake, dark stirring, light stirring, light aeration, precipitation, drainage, and idleness. ; Idle time is 0-0.5h, set according to needs;
[0047] 2) Inoculate sludge, inoculate activated sludge in A2 / O process aeration tank, after sludge inoculation, when the SBR reactor is at the highest water level, the sludge concentration in the system is 4.95g / L;
[0048] 3) In the photosynthetic acclimation stage, use tap water to add sodium phosphate and sodium acetate to mix water so that the influent TP is 40mg / L, the influent volatile fatty acid is 420mg / L, and the influent volatile fatty acid / TP=10.05> 10; According to step 1) sequence operation, each cycle is 8h, including 3h dark stirring, light stirring 2h, light aeration 2h, sedimentation 45min, the rest of the time is water intake, drainag...
Embodiment 2
[0052] Step 1)-4) Same as Example 1;
[0053] 5) In the sewage treatment stage, domestic sewage is used, the influent TP is 10mg / L, the influent COD is 200mg / L, and the influent COD / TP=20> 6. Influent alkalinity is 100mg / L, influent alkalinity / TP=2.5> 2; Adopt SBR reactor, run in the order of water intake, dark stirring, light stirring, precipitation, drainage, and idle, without aeration; dark stirring time 1h; when light stirring, the illumination is 3000lux / m 2 ; The age of the sludge in the control system is 10d; the light is stirred until TP in the system <0.1mg / L, stop stirring, settling for 30min, drain water, enter the next cycle after being idle, repeat this mode of operation; after 5d, the light stirring time is reduced from 4h to 2h, and then the fixed light stirring time is 2h (cycle time Is 3h). The maximum TP concentration in the system during the dark stirring stage is 24mg / L, which is 2.4 times the initial TP concentration of the system, indicating a good anaerobic ...
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Abstract
The invention discloses an enhanced biological phosphorus removal method, and belongs to the field of sewage treatment. Through the biological phosphorus removal effect enhancing by microalgae, the method aims at solving the problem that the existing phosphorus removal process cannot simultaneously ensure the operation effect and the operation cost. The method has the technical scheme that the method comprises the stages of photosynthetic domestication, photosynthetic enhancing, sewage treatment and the like; active sludge in a sewage plant biochemical pool with the biological phosphorus removal function is used as the inoculated sludge; the starting success is achieved after 60d; the system TP removal load can reach 0.04 kgP/kgMLSS.d to the highest degree; the in-system sludge VSS/TSS is greater than 0.80. The process has the advantages that the total phosphorus is removed; the total phosphorus removal rate is high; the rest sludge fertilizer effect is high; the energy consumption and the chemical consumption are low; the reaction speed is high; the occupied area is reduced; the method is applicable to the treatment of various kinds of phosphorus-containing waste water; the enhanced biological phosphorus removal method is particularly applicable to phosphorus removal of carbon-source-insufficiency sewage and phosphorus removal purification of polluted natural water bodies.
Description
Technical field [0001] The invention belongs to the field of sewage treatment, and specifically relates to an enhanced biological phosphorus removal method. Background technique [0002] Phosphorus removal is one of the important issues in wastewater treatment. In addition to two major methods including biological removal of phosphorus and chemical removal of phosphorus, there are also emerging microalgae removal of phosphorus. Phosphorus removal faces two issues. On the one hand, TP needs to be removed from the water body to prevent eutrophication; on the other hand, phosphorus is a non-renewable resource, and the reserves of phosphate rock in nature have reached the warning line and are facing exhaustion. The sewage needs to be removed. Phosphorus is recycled and reused to realize a healthy phosphorus cycle. [0003] Biological phosphorus removal mainly uses phosphorus-accumulating bacteria PAOs to release phosphorus under anaerobic conditions, excessively absorb phosphorus unde...
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