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A kind of enhanced biological phosphorus removal method

A biological phosphorus removal and water inflow technology, applied in chemical instruments and methods, biological water/sewage treatment, water pollutants, etc., can solve the problem that the effect and operating costs cannot be balanced, and achieve the effect of saving carbon sources

Active Publication Date: 2020-04-21
青岛锦龙弘业环保有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[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

Method used

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  • A kind of enhanced biological phosphorus removal method
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Examples

Experimental program
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Effect test

Embodiment 1

[0046] 1) Reactor construction, using SBR reactor, the reactor is cylindrical, with a bottom diameter of 400cm, a height of 1200cm, and an effective volume of 125L. It operates in the order of water intake, dark stirring, light stirring, light aeration, precipitation, drainage, and idle ;Idle time is 0-0.5h, set according to need;

[0047] 2) Inoculate sludge and inoculate activated sludge in the aeration tank of A2 / O process. 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 stage of photosynthetic acclimation, 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; follow the steps 1) Sequential operation, each cycle is 8 hours, including 3 hours of stirring in the dark, 2 hours of light stirring, 2 hours of light aeration, 45 minutes o...

Embodiment 2

[0052] Steps 1)-4) are the same as in 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, the influent COD / TP=20>6, the influent alkalinity is 100mg / L, and the influent alkalinity / TP=2.5>2; adopt SBR reactor, run in the order of water intake, dark stirring, light stirring, sedimentation, drainage, idle, no aeration; dark stirring time 1h; light stirring, the illuminance is 3000lux / m 2 ;The sludge age of the control system is 10d; Stir with light until TP<0.1mg / L in the system, stop stirring, drain water after 30 minutes of sedimentation, enter the next cycle after idle, repeat this mode of operation; after 5 days, the light stirring time starts from the beginning The 4h is reduced to 2h, and then the fixed light and stirring time is 2h (the cycle time is 3h). The maximum concentration of TP in the system during the dark stirring stage was 24mg / L, which was 2.4 times of the initial TP concentra...

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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 in particular relates to an enhanced biological phosphorus removal method. Background technique [0002] Phosphorus removal is one of the important topics of sewage treatment. In addition to biological phosphorus removal and chemical phosphorus removal methods, there is also an emerging microalgae phosphorus removal method. 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 natural phosphate rock reserves have reached the warning line and are facing depletion. Sewage needs to be removed. Phosphorus is recycled and reused to realize a healthy cycle of phosphorus. [0003] Biological phosphorus removal mainly uses phosphorus accumulating bacteria PAOs to release phosphorus under anaerobic conditions, absorb phosphorus excessively under aerobic conditions, and r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/32C02F3/30C02F101/10
CPCC02F3/308C02F3/325C02F2101/105
Inventor 吴迪王金龙杜强强
Owner 青岛锦龙弘业环保有限公司
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