Short-cut nitrification method for denitrification of corn starch wastewater by sub-influent SBR process
A segmented water and cornstarch technology, applied in the direction of aerobic and anaerobic treatment, can solve the problems of complex and uneconomical operation control process, reduce the cost of alkali injection, facilitate upgrading, and reduce pH fluctuations Effect
Active Publication Date: 2021-07-23
CHANGCHUN INST OF TECH
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Obviously, this will not only complicate the operation control process, but also for cornstarch wastewater with high ammonia nitrogen, whether it is to use the internal carbon source with a slow denitrification rate for denitrification, or use the external carbon source to strengthen denitrification The nitrification process is very uneconomical
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[0117] ④ According to the change of wastewater quality every day, detect C 1 、C 2 and C N value, according to the test result, the formula (1) described in the previous technical solution is used to modify λ 1 value, and then according to the modified λ 1, adjust the ratio of the first concentration water and the second concentration water into the mixing water tank 3 in real time, so that the mixing water in the mixing water tank 3 has a stable C / N ratio to meet the needs of denitrification. The specific implementation is as follows:
[0118] See attached figure 2 , the detected water quality parameter C 1 、C 2 and C N The value is input to the data processor 41 through the parameter setting and the display terminal 43, and the λ is calculated by the formula (1) stored in the data processor 1 , and show λ on the display 1 value; the λ 1 After the value is confirmed, the first concentration water distribution pump relay 46, the first concentration water distribution...
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The invention discloses a method for denitrification of cornstarch wastewater by a short-range nitrification segmented water-inflow SBR process, which is suitable for the denitrification treatment of cornstarch wastewater and similar industrial wastewater. A treatment cycle of the segmented water-influent SBR process has a series of A / O periods, introducing an appropriate amount of high-COD concentration water to increase the C / N of the influent, and concentrating the influent at the beginning of each A period. The first time enters low C / N water, the 2nd~n-1 time enters mixed water with suitable C / N, and the nth time only enters an appropriate amount of high COD concentration water; the aerobic nitrification of each stage is controlled by pH and DO. pH controls denitrification at each stage; high ammonia, high temperature, high pH and low DO strategies are used to start short-cut nitrification, and then the long-term stable operation of short-cut nitrification of the system is maintained by rationally controlling DO with the help of the wastewater's own temperature and ammonia nitrogen concentration. The invention can improve the water quality of the effluent water, simplify the operation control conditions, and realize the purpose of raising standards, saving energy and reducing consumption while giving full play to the advantages of the segmented water-inlet SBR process.
Description
technical field [0001] The invention belongs to the technical field of biological treatment of sewage and waste water, and in particular relates to a method for denitrification of corn starch waste water in a short-range nitrification segmented water-inflow SBR process. SBR is the abbreviation for Sequencing Batch Reactor. Background technique [0002] my country is a big agricultural country with developed corn deep processing industry. Corn starch wastewater is a general term for the wastewater generated in each process in the process of producing starch from corn or starch sugar from starch. The production of corn starch and its products not only consumes a lot of water, but also has a large amount of sewage discharge, and its wastewater has the characteristics of "4 high and 1 low", that is, high chemical oxygen demand (COD), high suspended solids, high total nitrogen, The total phosphorus is high and the pH is low, so the terminal treatment is very difficult. [0003...
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IPC IPC(8): C02F3/30
Inventor 龙北生李红艳康华白蕾刘红波万立国林巧熊玲李宁
Owner CHANGCHUN INST OF TECH