Device and method for distributing water-inlet carbon source of sewage treatment plant

Abstract

The invention discloses a device and a method for a sewage treatment plant to distribute an influent carbon source. The device is provide with a water storage tank, a pre-anoxic tank, a valve A and a valve B, an electric control valve, a controller and a on-line nitrate instrument, wherein the water storage tank is provided with a water outlet pipe, the on-line nitrate instrument is arranged in the aeration tank of the original sewage treatment equipment, the controller is connected with the on-line nitrate instrument through signal, and is controlled by and connected with the electric control valve. The device is matched with the original sewage treatment equipment; the method comprises setting the retention period of the water in the pre-anoxic tank, adjusting the water intake ratio between the pre-anoxic tank and the anaerobic tank, etc. The device and the method are applied to the matching application of the A<2> / O sewage treatment process, and the raw water carbon source is saved and reasonably used to ensure the sewage treatment effect to be better.

Description

technical field [0001] The invention belongs to a denitrification and dephosphorization sewage treatment technology of a sewage treatment plant, in particular to an auxiliary device and a method for rationally distributing carbon sources in the sewage and making the effect of denitrification and dephosphorization treatment of sewage better. Background technique [0002] At present, most of them use A 2 The nitrogen and phosphorus content of the effluent of the urban sewage treatment plant of the / O process cannot meet the standard at the same time. The main reason is that the limited carbon source in the inflow sewage cannot be reasonably allocated and utilized, resulting in the formation of vicious competition between denitrifying bacteria and phosphorus accumulating bacteria for substrates. , can not meet the needs of denitrification and phosphorus release at the same time. Usually, the addition of external carbon sources, such as methanol, acetic acid, etc., is used to i...

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Problems solved by technology

[0002] Most of the current use of A 2 The nitrogen and phosphorus content of the urban sewage treatment plant effluent of the / O process cannot reach the standard at the same time. The main reason is that the limited carbon source in the influent sewage cannot be rationally allocated and utilized, resulting in vicious competition between denitrifying bacteria and phosphorus accumulating bacteria for the substrate. , cannot meet the needs of denitrification and phosphorus release at the same time

Usually, external carbon sources, such as methanol, acetic acid, etc., are used to improve the effect of biological denitrification, or chemical agents, such as ferrous sulfate, polyaluminum chloride, etc., are used to improve the effect of phosphorus removal, although this method has A certain effect, but the cost of this method is very high, and at the same time, the more use of chemical drugs will easily increase the re-pollution of sewage, which will have an adverse impact on the environment

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