Denitrification method for corn starch wastewater of step-feeding SBR technology for partial nitrification

A segmented water inflow and cornstarch technology, applied in the direction of aerobic and anaerobic process treatment, can solve the problems of complex and uneconomical operation control process, achieve the effect of simplifying operation control conditions and improving effluent water quality

Active Publication Date: 2019-06-14
CHANGCHUN INST OF TECH
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Problems solved by technology

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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  • Denitrification method for corn starch wastewater of step-feeding SBR technology for partial nitrification
  • Denitrification method for corn starch wastewater of step-feeding SBR technology for partial nitrification
  • Denitrification method for corn starch wastewater of step-feeding SBR technology for partial nitrification

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specific Embodiment approach

[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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Abstract

The invention discloses a denitrification method for corn starch wastewater of a step-feeding SBR technology for partial nitrification. The denitrification method is suitable for denitrification treatment of corn starch wastewater and similar industrial wastewater. One processing period of the step-feeding SBR technology has n(larger than or equal to 3) serially-connected A/O time frames; a properamount of high COD concentration water is introduced for increasing inflow C/N; water is centrally fed at the beginning of each A time frame; low C/N water is fed at the first time; mixed water withproper C/N is fed at the (2-n-1)th time; only a proper amount of high COD concentration water is fed at the nth time; aerobiotic nitration at each section is controlled by pH and DO and denitrification at each section is controlled by pH; a high-ammonia, high-temperature, high-pH and low-DO strategy is adopted for starting partial nitrification, and then partial nitrification and long-term stablerunning of a system can be maintained by reasonably controlling DO in virtue of self-temperature and ammonia nitrogen concentration of wastewater. According to the denitrification method, the advantages of the step-feeding SBR technology can be fully utilized, and meanwhile, effluent quality can be improved, a running control condition can be simplified, and the purposes of upgrading, saving energy and reducing consumption can be achieved.

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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
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
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