A method for synchronous denitrification and dephosphorization of sewage based on moving bed sequencing batch reactor
A sequencing batch reactor and simultaneous nitrogen and phosphorus removal technology, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems affecting nitrification and phosphorus accumulation effects, total nitrogen Low removal rate and other problems, to achieve the effect of improving the nitrogen and phosphorus removal effect and system stability of sewage, eliminating the interference of biological phosphorus removal, and preventing accumulation
Active Publication Date: 2019-03-05
ANHUI UNIVERSITY
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Problems solved by technology
[0006] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a method for synchronous denitrification and dephosphorization of sewage based on moving bed sequence batch reactors to solve the problem of competition between nitrifying bacteria and phosphorus accumulating bacteria for electrons when they are aerobic in traditional MSBR. Acceptors, affecting the effect of nitrification and phosphorus accumulation, and technical problems such as low removal rate of total nitrogen
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Embodiment 1
[0022] 1. Experimental steps
[0023] (1) Inoculation wastewater:
[0024] The sludge was taken from the oxidation ditch of Wangtang Wastewater Treatment Plant in Hefei, and was acclimatized and inoculated in the MSBR reactor. The MLSS was controlled at 1g / L. Synthetic wastewater was used as influent, and the influent load was gradually increased according to the different stages I-III. The water quality components inoculated at each stage are shown in Table 1, and the pH was adjusted to about 7.0 with 1mol / L HCl and solid sodium bicarbonate.
[0025] Table 1: Synthetic wastewater quality
[0026]
[0027] (2) Phase I: Initial biofilm formation period (day 0-29):
[0028] This period operates in a typical cycle of MSBR, that is, in the operation cycle, the operation mode of the reaction stage is anaerobic-aerobic-anoxic, so as to enrich the nitrifying bacteria and phosphorus accumulating bacteria in the biofilm;
[0029] (3) Phase II: Enrichment period of denitrifying ph...
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The invention discloses a method for synchronous denitrification and phosphorus removal of sewage based on a moving bed sequence batch reactor. During the MSBR operation cycle during the enrichment period of phosphorus bacteria, nitrate nitrogen was added at the beginning of the anoxic period. The method for synchronous denitrification and phosphorus removal of sewage based on MSBR of the present invention can enrich nitrifying bacteria and denitrifying phosphorus-accumulating bacteria in a single reactor MSBR to form a simultaneous nitrification and denitrification phosphorus removal (SNDPR) reaction system, so that a carbon source can be used It is suitable for the two processes of denitrification and phosphorus removal, especially for the simultaneous denitrification and phosphorus removal of low-carbon / nitrogen sewage, which is conducive to improving the nitrogen and phosphorus removal effect and system stability of sewage; this method is flexible in operation, simple in structure, and impact-resistant The load is strong, and no backwashing is required, and the maintenance cost is low, ensuring a more stable MSBR reaction system.
Description
technical field [0001] The invention relates to a sewage treatment method, in particular to a method for synchronous denitrification and dephosphorization of sewage based on MSBR. Background technique [0002] There are more organic matter and nutrients such as nitrogen and phosphorus in municipal sewage, domestic sewage and some industrial wastewater. The discharge of wastewater containing nitrogen and phosphorus can cause eutrophication of water bodies and cause serious harm. Compared with physical and chemical methods, biological nitrogen and phosphorus removal has the advantages of high efficiency and economy. Nitrifying bacteria and denitrifying phosphorus accumulating bacteria are ubiquitous in sewage biological treatment systems and play an important role in the removal of nitrogen and phosphorus, respectively. However, the low proportion of carbon sources in sewage and the competition of various microorganisms restrict the improvement of the efficiency of tradition...
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IPC IPC(8): C02F3/30C02F3/34
CPCC02F3/301C02F3/302C02F3/34
Inventor 石先阳陶先超产丹丹汪博伟
Owner ANHUI UNIVERSITY