A method for controlling short-range nitrification using combined inhibitors
A technology of short-range nitrification and combined inhibition, which is applied in chemical instruments and methods, water/sludge/sewage treatment, biological water/sewage treatment, etc., can solve the instability of short-range nitrification, low reaction rate, and influence on the popularization and application of short-range nitrification, etc. question
Active Publication Date: 2021-09-10
SHENYANG NORMAL UNIV
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Problems solved by technology
At present, most of the methods used to realize short-range nitrification are to control parameters such as dissolved oxygen and pH. The reaction rate is low, and short-range nitrification is unstable, which affects the popularization and application of short-range nitrification.
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[0030] A method of controlling short-range nitrification using a combined inhibitor. In a stable SBR, dosing 0.25mL / L formic acid at the same time of the day, dosing 7.5mg / L hydrazine every other day, and dosing the next day 7.5mg / L hydrazine, repeated dosing, with a one-day interval between the two repetitions, and other conditions unchanged, when the stable operation of short-range nitrification was realized after the 8th day, the average nitrosation rate [NO 2 - -N / (NO 2 - -N+NO 3 - -N)] reaches more than 92%.
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The invention belongs to the technical field of sewage treatment methods, and specifically relates to a method for controlling short-range nitrification by using combined inhibitors. In a SBR or MBBR with stable operation, formic acid, hydrazine, and hydrazine are repeatedly added in the form of formic acid, hydrazine, and other conditions remain unchanged. , to achieve short-cut nitrification stably. The nitrosation rate of the method provided by the invention is above 92%, and the removal rate of ammonia nitrogen is above 98%.
Description
technical field [0001] The invention belongs to the technical field of sewage treatment methods, and in particular relates to a method for controlling short-range nitrification by using combined inhibitors. Background technique [0002] With the rapid development of my country's economy and technology, the shortage of water resources and the pollution of water environment have become increasingly prominent. The problem of water pollution has become one of the most important restrictive factors for my country's economic and social development, and the problem of ammonia nitrogen pollution is the top priority, which has attracted great attention from the national and local governments. [0003] Short-cut nitrification and denitrification denitrification process is a new type of biological denitrification technology that has just been developed in recent years. This technology has less sludge production, is compact and efficient, and saves energy consumption, and has been more ...
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IPC IPC(8): C02F3/12
CPCC02F3/1263C02F3/1268C02F2101/16Y02W10/10
Inventor 李娜胡筱敏李国德林星月武士威柳叶飞杨静瑜
Owner SHENYANG NORMAL UNIV