High efficient multifunctional wastewater treatment system

Abstract

The invention belongs to the technical field of sewage treatment, and in particular relates to a high efficient multifunctional wastewater treatment system used for hardly-degradable organic wastewater. In the invention, the system comprises a DAT (Demand Aeration Tank)A tank, a DAT (Demand Aeration Tank) O tank and an IAT (Intermittent Aeration Tank) connected with each other in series, and thus a DATA-DATO-IATn process is formed, wherein the DATA tank is a preaeration section with functions of preaeration, hydrolysis acidification, biological selection and the like; the DATO tank is an aerobic aeration section in which the wastewater is continuously aerated to impel pollutants to be continuously degraded and transformed under an aerobic effect; and the IATn tank treatment section is a group of reaction tanks which are connected with each other in parallel and have the same functions, and the wastewater alternately enters each tank according to a certain time sequence to respectively finish processes of aeration, sedimentation, water drainage, idling and the like so as to remove the pollutants. The wastewater treatment system has the advantages of increasing the applicability to the biochemical treatment of various wastewaters, reducing the influence of high concentration wastewater on biological bacterium or biological reaction and assuring the normal and stable operation of the whole wastewater treatment system.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to an efficient and multifunctional waste water treatment system for refractory organic waste water. Background technique [0002] In the field of environmental engineering, the process of treating municipal sewage and industrial wastewater with biochemical methods is widely used, and its notable features are low operating costs and no secondary pollution. [0003] However, for high-concentration refractory organic wastewater, if the general traditional A / O method, A 2 / O method, SBR method and its modified oxidation ditch method, etc., all have some disadvantages and cannot achieve the desired effect. For example, the A / O process is the abbreviation of anoxic / aerobic process. Usually, before the conventional aerobic activated sludge treatment system, an anoxic or anaerobic biological treatment process is added to remove BOD at the same time. 5 and ammonia nit...

AI Technical Summary

Problems solved by technology

[0003] However, for high-concentration refractory organic wastewater, if the general traditional A / O method, A 2 / O method, SBR method and its modified oxidation ditch method, etc., all have some disadvantages and cannot achieve the desired effect.

For example, the A / O process is the abbreviation of the anoxic / aerobic process. Usually, an anoxic or anaerobic biological treatment process is added before the conventional aerobic activated sludge treatment system to remove BOD at the same time. 5 and ammonia nitrogen, for the treatment of high concentration ammonia nitrogen wastewater (NH 3 -N≥200mg / L) but it is difficult to operate normally

Another example is A 2 The / O method process is to add an anaerobic section before the A / O method, and the wastewater is continuously or repeatedly carried out through anaerobic-anoxic-aerobic, which improves the removal ability of refractory wastewater and also strengthens the removal of nitrogen and nitrogen. The effect of phosphorus, the disadvantage is that the effect of phosphorus removal is not very ideal due to the limitation of sludge age, dissolved oxygen and nitrate nitrogen in the return sludge

SBR method is the English abbreviation of intermittent aeration activated sludge method. Its main feature is composed of a reaction tank. The wastewater enters the reaction tank in sequence according to a certain sequence, and completes the processes of water intake, aeration, sedimentation, drainage and idleness respectively. , so that the wastewater is in different states of anaerobic, anoxic, and aerobic to achieve the purpose of purification. This process has a strong effect of nitrogen and phosphorus removal, but the removal rate of high-concentration pollutants with poor biodegradability is poor. At the same time, due to The SBR method adopts one pool operation, which cannot fully realize continuous and stable operation, and the effluent water quality also fluctuates to a certain extent

Images