A method for quick start-up of snad process in upflow micro-aerobic membrane bioreactor
A membrane bioreactor and rapid start-up technology, applied in chemical instruments and methods, aerobic and anaerobic process treatment, biological water/sewage treatment, etc., can solve problems such as instability and long start-up period of SNAD process, and achieve cost Low profile, small footprint, simple operation
Active Publication Date: 2021-05-04
国拓化能环境科技(北京)有限公司
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] Aiming at the problem of long and unstable start-up period of the SNAD process, the present invention provides a quick start-up method of the SNAD process in an upflow micro-aerobic membrane bioreactor, by controlling the concentration of dissolved oxygen, effluent NH 4 + -N and NO 2 - -N ratio and membrane module interception of sludge and other methods to realize the rapid start-up of the SNAD process
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0031] A method for quickly starting the SNAD process in an upflow type micro-aerobic membrane bioreactor, mainly comprising the following steps:
[0032] (1) Inoculation of activated sludge and equipment
[0033] like figure 1 As shown in , the upflow micro-oxygen membrane bioreactor SNAD process quick start device, reactor 1 is a cylinder with interlayer, inner diameter 0.07m, outer diameter 0.09m, height 1.2m, effective volume 4L. Reactor 1 is equipped with a polyvinylidene fluoride (PVDF) hollow fiber membrane 8 with a pore diameter of 0.3 μm and an effective membrane area of 0.3 m 2 .
[0034] The water inlet pipe connected to the bottom water inlet 4 of the reactor 1 is connected to the water inlet pump 2, the aeration pipe connected to the aeration port 5 at the bottom of the reactor 1 is connected to the air pump 3, and the aeration pipe connected to the aeration port 5 The head 7 is a cylindrical titanium aeration head with a pore size of 5 microns, and the sludg...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| height | aaaaa | aaaaa |
| pore size | aaaaa | aaaaa |
| area | aaaaa | aaaaa |
Login to View More
Abstract
The invention discloses a method for quickly starting the SNAD process in an upflow type microoxic membrane bioreactor. In the upflow type microoxic membrane bioreactor, waste water with a low C / N ratio is used as the influent water quality, and high sludge is used at the initial stage of startup The operation mode with a concentration of 16.0g / L and a low sludge load of 0.064kgCOD / kgSS.d mainly controls the ratio of effluent ammonia nitrogen to nitrite nitrogen within a certain range by adjusting DO, temperature, and alkalinity, and passes the Shorten the residence mode to increase the nitrogen load and carbon load, quickly start the SNAD process, and realize the coexistence of anammox particles and floc sludge. The system has efficient synchronous decarbonization and nitrogen removal effects, COD, NH 4 + The removal rates of ‑N and TN are 89%, 96% and 86% respectively, with small footprint, simple operation and low energy consumption.
Description
technical field [0001] The invention belongs to the technical field of sewage treatment, in particular to a method for quickly starting a short-cut nitrification-denitrification-anaerobic ammonium oxidation (SNAD) process in an upflow micro-aerobic membrane bioreactor, which can quickly start the short-cut nitrification-denitrification-anaerobic process The ammonia oxidation process is suitable for low C / N ratio wastewater treatment. Background technique [0002] The SNAD process refers to a new biological denitrification technology in which short-range nitrification, short-range denitrification and anammox occur simultaneously. It has the advantages of low energy consumption, small demand for carbon sources, low sludge output, small footprint, and efficient decarbonization and nitrogen removal. And other characteristics, suitable for industrial wastewater or municipal sewage with low C / N. However, due to the long generation cycle of anammox bacteria in the SNAD system and ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30
CPCC02F3/307C02F2209/08C02F2209/14C02F2209/16
Inventor 苏本生郭佳刘广青王雯张原洁
Owner 国拓化能环境科技(北京)有限公司