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Two-stage biological treatment equipment for high COD and high NH3-N coal chemical sewage

A biological treatment equipment and biological treatment technology, applied in the field of two-stage biological treatment equipment, can solve the problems of accelerated oxidation and decomposition of organic matter, weak impact resistance, poor operation stability, etc., and achieve good sewage treatment effect and strong impact resistance , to ensure the effect of effective operation

Active Publication Date: 2013-11-27
SINOPEC NINGBO ENG +3
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Problems solved by technology

Among them, high concentrations of organic pollutants (COD) and ammonia nitrogen (NH3-N) in sewage are difficult to be biodegraded, and the existence of a large number of refractory substances leads to large changes in water quality and quantity, and poor biodegradability. The treatment of COD and high ammonia nitrogen coal chemical wastewater has always been a difficult problem in the field of pollutant treatment
In order to solve this problem, some new coal chemical wastewater treatment methods have appeared in recent years, such as PACT method, anaerobic biological method, anaerobic-aerobic biological method, etc. The PACT method utilizes the adsorption of organic matter and dissolved oxygen by activated carbon It provides food for the growth of microorganisms, thereby accelerating the oxidative decomposition of organic matter. This treatment method has a poor removal effect when the concentration of organic pollutants (COD) and ammonia nitrogen (NH3-N) is high, and it is difficult to achieve the desired effect. Purification effect; while the simple anaerobic biological method and anaerobic-aerobic biological method treatment equipment have disadvantages such as poor operation stability and weak impact resistance, which affect the normal and stable operation of the sewage plant

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  • Two-stage biological treatment equipment for high COD and high NH3-N coal chemical sewage

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Embodiment 1

[0013] Embodiment 1: as figure 1 As shown, a two-stage biological treatment equipment for coal chemical wastewater containing high COD and high ammonia nitrogen includes a first-stage biological treatment device I, a second-stage biological treatment device II and a control device III.

[0014] The first section of biological treatment device I includes a section of biochemical system, an intermediate sedimentation tank 4 and a section of sludge return and discharge system, wherein the section of biochemical system can include a section of biochemical anaerobic zone 1 and a section of biochemical anoxic zone 2 according to the quality of incoming water. 1. All or part of a section of biochemical aerobic zone 3; a section of sludge return and discharge system includes a section of sludge return and discharge control valve 9, a section of sludge return channel 12 and a section of sludge discharge channel 13.

[0015] The above-mentioned second-stage biological treatment device I...

Embodiment 2

[0024] Embodiment 2: adopt figure 1 The shown two-stage biological treatment equipment for coal chemical wastewater containing high COD and high ammonia nitrogen, the main influent water quality is COD=700mg / L, BOD5=450mg / L, SS=50mg / l, ammonia nitrogen=270mg / l Coal chemical sewage is treated biologically. The first biochemical system adopts the first biochemical aerobic zone 3, the hydraulic retention time is 12h, the sludge concentration is 4000mg / L, the intermediate sedimentation tank 4 adopts radial flow sedimentation tank, and the second biochemical system adopts the second stage The biochemical anoxic zone 6 and the second-stage biochemical aerobic zone 7, the hydraulic retention time is 50h, the sludge concentration is 6000mg / l, the terminal mud-water separation zone 8 adopts submerged ultrafiltration membrane to filter the water, and the whole process is controlled by the control system 18 according to the Water quality, operation monitoring instruments and set operatio...

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Abstract

The invention discloses two-stage biological treatment equipment for high COD and high NH3-N coal chemical sewage. The equipment is characterized in that: it comprises a first-stage biological treatment device, a second-stage biological treatment device and a control device. The equipment employs a technology combining a first-stage biological treatment and a second-stage biological treatment, and makes use of the first-stage biological treatment device to degrade toxic, harmful and biologically inhibitory substances in inflow water in advance, thus reducing the load of following second-stage biological treatment of organic pollutants, and achieving a better sewage treatment effect. In addition, as the first-stage biological treatment device and the second-stage biological treatment device can realize independent operation and control, the effective operation of each biochemical treatment section is ensured. Thus, the treatment equipment can operate flexibly and stronger impact resistance.

Description

technical field [0001] The invention relates to the field of coal chemical sewage treatment equipment, in particular to a two-stage biological treatment equipment for coal chemical sewage containing high COD and high ammonia nitrogen. Background technique [0002] Coal chemical enterprises will discharge a large amount of sewage during the production process. The sewage generally contains a large amount of suspended solids, phenol, cyanide, oil, ammonia nitrogen and other toxic and harmful substances. Among them, high concentrations of organic pollutants (COD) and ammonia nitrogen (NH3-N) in sewage are difficult to be biodegraded, and the existence of a large number of refractory substances leads to large changes in water quality and quantity, and poor biodegradability. The treatment of COD and high ammonia nitrogen coal chemical wastewater has always been a difficult problem in the field of pollutant treatment. In order to solve this problem, some new coal chemical wastewa...

Claims

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Application Information

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IPC IPC(8): C02F3/30
Inventor 陈鑫李力褚小华李明波夏兰生
Owner SINOPEC NINGBO ENG
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