Developing solution wastewater treatment system

Abstract

The invention discloses a developing solution wastewater treatment system, the system mainly comprises a TMAH decomposition reaction tank and a membrane separation tank, a water distributor is arranged in the decomposition reaction tank, and the water distributor uniformly distributes reaction tank inlet water and membrane separation tank circulating reflux at the bottom of the tank; an immersed membrane component is mounted in the membrane separation tank, a perforated aeration pipe is arranged at the lower part of the membrane component, the aeration pipe is connected with an air pipeline outside the tank, membrane wires of the immersed membrane component are shaken through aeration, sludge is prevented from being deposited on the surfaces of the membrane wires, and the reaction tank and the membrane separation tank form a closed loop by the whole system through a connecting pipeline. The treatment system disclosed by the invention does not need to heat wastewater, and is simple to operate and relatively low in energy consumption; the treatment load of the reaction tank is improved, the effective volume of the reaction tank is reduced, and the occupied area of the system is saved; and moreover, the maximum concentration of TMAH (Tetramethyl Ammonium Hydroxide) tolerated by the whole system is 2000mg / L, and the removal rate of the TMAH can reach more than 80%.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a developer wastewater treatment system. Background technique [0002] High-concentration developer wastewater is produced during the production of LCD panels, and the main component of the wastewater is Tetramethylammonium hydroxide (TMAH). TMAH is an organic nitrogen compound with strong alkalinity, corrosiveness and biological toxicity. It is difficult to biodegrade. At high concentrations, it can inhibit the activity of aerobic microorganisms in the wastewater biochemical treatment system, making the total nitrogen of the biochemical system And the removal rate of ammonia nitrogen is reduced, which affects the discharge of treated effluent. [0003] In the invention patent CN111285547A, it is proposed to use anaerobic biochemical process to treat high-concentration developer wastewater, and degrade TMAH into ammonia nitrogen and biogas through anaerobic methanog...

AI Technical Summary

Problems solved by technology

However, this process has the following disadvantages: after the anaerobic biochemical treatment of the developer wastewater, most of the organic carbon in the TMAH is converted into methane and escapes from the water, while most of the organic nitrogen has been converted into ammonia nitrogen but still remains in the water, making the anaerobic The carbon-nitrogen ratio of the oxygen biochemical treatment effluent is greatly reduced

When the A / O biochemical process is used to further remove total nitrogen from the anaerobic effluent, it is necessary to add an external carbon source agent (such as glucose) to meet the demand for carbon source in the denitrification process, so that the operation of the wastewater treatment system cost increase

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