Mud film intergrowth combined type membrane bioreactor and method for treating and recycling sewage thereof
A membrane bioreactor and membrane biological reaction technology, which is applied in aerobic and anaerobic process treatment and other directions, can solve the problems of membrane bioreactor easy membrane fouling, poor biological phosphorus removal effect, and high volume load, and achieve easy formation of mud. Membrane symbiosis system, improving effluent quality and reducing energy consumption
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Embodiment 1
[0048] Depend on Figure 1 to Figure 5 It can be seen that a mud film symbiotic composite membrane bioreactor includes anaerobic baffle unit (1), anoxic unit (2), contact oxidation unit (3) and membrane bioreaction unit (4);
[0049] The top of the side wall of the anaerobic baffle unit (1) is provided with a water inlet pipe (5); the anaerobic baffle unit (1) communicates with the anoxic unit (2) through the first water hole (12), wherein The first water hole (12) is set on the side wall shared by the anaerobic baffle unit (1) and the anoxic unit (2);
[0050] The anoxic unit (2) has a suspended filler I (13) inside, and a submerged aeration and stirring machine (14) is installed floating in the middle; the anoxic unit (2) contacts with the The oxidation unit (3) is connected, wherein the second water passage hole (15) is set on the side wall shared by the anoxic unit (2) and the contact oxidation unit (3); the side wall of the anoxic unit (2) is close to the second water pa...
Embodiment 2
[0058] Sewage and wastewater after front-end pretreatment (such as domestic sewage treated by grille, sand settling, etc.) enters the anaerobic baffle unit, and the water flows vertically downward, then bypasses the baffle plate, and then vertically upwards, passing through each grid one by one. Reactive, with good hydraulic flow. The anaerobic baffle unit mainly completes the hydrolysis and acidification reaction of refractory organic matter, improves the biodegradability of sewage, and at the same time completes the anaerobic phosphorus release reaction.
[0059] The anoxic unit contains suspended filler I (columnar suspended filler). The liquid surface of the anoxic unit is floating and equipped with a submerged aeration and agitation machine. Can be aerated. Anoxic unit, anaerobic baffle unit, contact oxidation unit and membrane bioreaction unit are provided with water holes on the partition walls, and screens are vertically installed at the water holes, and the screens p...
Embodiment 3
[0063] A kind of mud film symbiosis composite membrane bioreactor of embodiment 1 is carried out the method for sewage treatment and reuse to process domestic sewage, concrete steps are:
[0064] (1) The sewage enters the anaerobic baffle unit through the water inlet pipe to complete the hydrolysis and acidification reaction, and at the same time complete the anaerobic phosphorus release reaction, and control the dissolved oxygen in the anaerobic baffle unit to ≤0.2mg / L;
[0065] (2) The effluent from the anaerobic baffle unit enters the anoxic unit to react, and the dissolved oxygen in the anoxic unit is controlled to be ≤0.5mg / L; part of the effluent (mixed liquid) from the anoxic unit is returned to the anaerobic baffle unit, and the reflux ratio is controlled to 25%- 100%, the other part enters the contact oxidation unit, and the dissolved oxygen in the contact oxidation unit is controlled to 2mg / L -6mg / L; the organic matter in the sewage water is oxidized and degraded by m...
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