Ecological bed for pretreating coking wastewater

Abstract

The invention discloses an ecological bed for pretreating coking wastewater. The ecological bed is cylindrical; the cylindrical ecological bed is provided with an annular water inlet, a first-stage magnetic field generator, a second-stage magnetic field generator and an iron-carbon filler filling the space between the first-stage magnetic field generator and the second-stage magnetic field generator; and a plurality of water inlets are uniformly distributed in the lower part of the first-stage magnetic field generator. Water passes through the iron-carbon filler, then flows across the second-stage magnetic field generator, and is discharged out of the ecological bed from a water outlet, wherein the first-stage magnetic field generator and the second-stage magnetic field generator are connected in series through a wire and then are connected with an external power supply. According to the ecological bed, the magnetic field generators are additionally arranged to two sides of the iron-carbon filler, and after a magnetic field is added to the iron-carbon filler, the iron-carbon filler generates micro-vibration under the action of the alternating magnetic field, so that the situation of material hardening and blocking is effectively avoided. In addition, the magnetic field can enable adhesion of a polymer on a biological film surface on the filler to be better, meanwhile, activityof enzymes is improved, and treatment efficiency of the filler is further improved.

Description

technical field [0001] The invention relates to an ecological bed for pretreatment of coking wastewater, belonging to the technical field of sewage and wastewater treatment. Background technique [0002] Coking wastewater is produced during high-temperature carbonization of coal, gas purification, and refining of chemical products. It mainly contains phenol, cyanide, ammonia nitrogen, sulfide, and many refractory organic compounds. It has high biological toxicity and serious environmental pollution. At the same time, its suspended solids and chroma are also high, high concentration, poor biodegradability, and it is a kind of wastewater that is difficult to treat. [0003] In response to such problems, iron-carbon micro-electrolytic fillers, as a mature electrochemical process, can improve the biodegradability of sewage and wastewater, and have been widely used in the treatment of refractory sewage and wastewater. In the iron-carbon micro-electrolytic filler, iron filings ar...

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Problems solved by technology

[0005] Purpose of the invention: The technical problem to be solved by the present invention is to provide an ecological bed for pretreatment of coking wastewater. The ecological bed is provided with a magnetic field generator on both sides of the iron-carbon filler. After adding a magnetic field to the iron-carbon filler, , under the action of an alternating magnetic field, the iron-carbon filler produces micro-vibrations, which effectively prevents the material from clogging and clogging; in addition, the magnetic field can make the polymer on the surface of the biofilm on the filler better adherent, and at the same time increase the activity of the enzyme. Thereby improving the processing efficiency of the filler

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