Domestic sewage treatment process and treatment system
A technology of domestic sewage and treatment process, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc. The denitrification and phosphorus removal effects cannot be optimal at the same time, so as to achieve the effect of good effect, high resource and energy recovery rate, and easy implementation.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0112] A domestic sewage treatment process, comprising the following steps:
[0113] (a) After the domestic sewage is removed by the pretreatment device to remove larger suspended solids and floating solids, the sewage is lifted to the phosphorus separation reaction tank through the lift pump, and the coagulant chlorine is removed by the water injector before entering the phosphorus separation reaction tank. Iron oxide is added to the pipeline, and mud-water separation is carried out in the phosphorus separation reaction tank to obtain sludge and the first supernatant, wherein the addition of coagulant is 20mg / L, and the hydraulic retention time in the phosphorus separation reaction tank (HRT) is 20min;
[0114] (b) After the sludge obtained in step (a) is pretreated with EDTA in the regulating tank, it enters the anaerobic fermentation reactor for anaerobic fermentation to produce acid and methane, and the biogas produced by anaerobic fermentation is collected and used as ene...
Embodiment 2
[0117] A kind of domestic sewage treatment process, different from embodiment 1 is:
[0118] In the present embodiment, the coagulant adopts polyferric chloride, the addition of coagulant is 25mg / L, and the hydraulic retention time (HRT) in the phosphorus separation reaction tank is 30min;
[0119] The dosage of EDTA is 80mg / L, the hydraulic retention time in the regulating tank is 15min, the stirring speed in the anaerobic fermentation reactor is 50rad / min, and the sludge retention time (SRT) in the anaerobic fermentation reactor is 10 sky;
[0120] All the other are identical with embodiment 1.
Embodiment 3
[0122] A kind of domestic sewage treatment process, different from embodiment 1 is:
[0123] In the present embodiment, coagulant adopts the mixture of ferric chloride and polyaluminum sulfate, and the add-on of coagulant is 30mg / L, and the hydraulic retention time (HRT) in the phosphorus separation reaction tank is 25min;
[0124] The regulator is EDTA salt, the dosage of EDTA salt is 150mg / L, the hydraulic retention time in the regulating tank is 12min, the stirring speed in the anaerobic fermentation reactor is 80rad / min, the sludge in the anaerobic fermentation reactor The residence time (SRT) is 12 days;
[0125] The dissolved oxygen (DO) concentration in the micro-oxygen denitrification reactor is controlled at 0.5mg / L;
[0126] All the other are identical with embodiment 1.
PUM
| Property | Measurement | Unit |
|---|---|---|
| pore size | aaaaa | aaaaa |
| pore size | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More