Granular sludge preparation method and reactor
A granular sludge and reactor technology, applied in chemical instruments and methods, water/sludge/sewage treatment, water pollutants, etc., can solve the problem of slow growth of granular sludge, long formation period, difficult anaerobic granular sludge and aerobic granular sludge to efficiently remove nitrogen and phosphorus to achieve the effect of improving the preparation and formation efficiency, strengthening the flocculation ability, and shortening the formation cycle
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[0034] Such as figure 1 , 2 Shown are the structural schematic diagram of the reactor and the flow chart of the granular sludge preparation method provided by the embodiments of the present invention. The granular sludge preparation method can be applied to the field of environmental protection, especially in the wastewater treatment of farms. The preparation method of granular sludge in this embodiment includes the following steps:
[0035] S11: In the reactor (e.g. figure 1 The inlet 101 of the anaerobic zone 1 (providing a relatively closed and oxygen-free environment) of the reactor shown is added to the wastewater to be purified (such as pig farm wastewater), and the wastewater to be purified is filled in the entire anaerobic zone 1 Then, the stirring device 11 in the anaerobic zone 1 is started, and the waste water to be purified in the anaerobic zone 1 is stirred by the stirring device 11.
[0036] In the specific operation, the stirring speed of the stirring device 11 in th...
Embodiment 1
[0057] Can be used in this embodiment figure 1 The bioreactor shown is inoculated with fresh flocculent sludge and non-granular sludge from the secondary sedimentation tank of the domestic sewage treatment plant at the initial start-up.
[0058] The formation process of flocculation-enhanced granular sludge in this embodiment is as follows: First, a certain pig wastewater (COD of 9845mg / L, water temperature of 24°C, and water flow rate of 0.1m / h) in Henan is injected and filled with anaerobic zone 1. , And then start the stirring device 11 to make the stirring speed 60rpm, while stirring, add the mixture of chitosan flocculant and flocculent sludge, and make the chitosan flocculant and flocculant in the wastewater in the anaerobic zone 1 The mixed concentration of sludge is 2500mg / L. Then, gradually reduce the speed of the stirring device 11 within 10 minutes until it stops. After standing for 3 hours, start the stirring device 11 again to stir, and keep the stirring device 11 at...
Embodiment 2
[0063] The same can be used in this embodiment figure 1 The bioreactor shown is inoculated with fresh flocculent sludge and non-granular sludge from the secondary sedimentation tank of the domestic sewage treatment plant at the initial start-up. That is, the flocculant is a microbial flocculant.
[0064] The flocculation-enhanced granular sludge formation process in this example is as follows: First, the sewage (COD of 6325mg / L, water temperature of 22°C, and inlet water flow rate of 0.1m / h) from a chicken farm in Henan is injected and filled into the anaerobic zone 1. Then start the stirring device 11 to make the stirring speed 40rpm, while stirring, add the mixture of microbial flocculant (flocculant prepared by the product of microbial metabolism) and flocculent sludge, and make the anaerobic zone 1 The mixed concentration of microbial flocculant and flocculent sludge in wastewater is 3200mg / L. Then gradually reduce the speed of the stirring device 11 within 10 minutes until ...
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