Calcium carbide wastewater treatment method

Abstract

The invention discloses a calcium carbide wastewater treatment method. The calcium carbide wastewater treatment method is characterized in that calcium carbide clear liquid wastewater firstly enters a reaction tank (1); a ferrous sulfate solution is added into the reaction tank (1) to be reacted with calcium carbide clear liquid wastewater to obtain a mixture I; the mixture I enters a pump suction water slot (2) and enters a pipeline mixer (3) through a pipeline pump; a flocculating agent is added into the pipeline mixer (3) to be sufficiently mixed with the mixture I to obtain a mixture II; the mixture II enters a calcium carbide wastewater treatment device (4); outlet water enters a monitoring tank (5); dilute sulfuric acid with concentration being 5% is added into the monitoring tank (5) to regulate the pH value of the outlet water, so that the outlet water reaches primary discharge standard of national Integrated Wastewater Discharge Standard (GB8978-1996), and the outlet water, which does not reach the standard, is subjected to adsorption treatment in an activated carbon device (6) and then discharged after reaching the standard; and after being subjected to flocculation reaction, suspending clarification, inclined tube precipitation, filtration and sludge concentration in the calcium carbide wastewater treatment device (4), the outlet water enters the monitoring tank (5).

Description

technical field [0001] The invention relates to the treatment of calcium carbide wastewater, in particular to a method for treating calcium carbide wastewater capable of removing relatively high COD, SS and sulfide in the calcium carbide wastewater. Background technique [0002] The treatment of calcium carbide wastewater in the prior art is to set up pre-settling tanks, ten acid, ten aeration, ten lime, twelve sedimentation tanks, ten flocculation reaction, thirteen sedimentation tanks, ten filtration, ten activated carbon adsorption and ten monitoring tanks. Its disadvantages are as follows: First, the hydrogen sulfide diffused by adding acid aeration causes secondary pollution and stench, and the process of absorbing and treating hydrogen sulfide is complicated and the cost is high; The treatment can reach the standard, but the activated carbon is easy to be saturated; third, the treatment process is complicated, difficult to operate and control, high energy consumption, ...

AI Technical Summary

Problems solved by technology

Its disadvantages are: first, the hydrogen sulfide diffused by adding acid aeration causes secondary pollution and stench, and the process of absorbing and treating hydrogen sulfide is complicated and costly; The treatment can reach the standard, but the activated carbon is easy to be saturated; third, the treatment process is complex, difficult to operate and control, high energy consumption, high one-time investment cost