Composite high-efficiency flocculating agent and sewage treatment method and matched sewage treatment device

Abstract

The invention relates to a composite high-efficiency flocculating agent. The composite high-efficiency flocculating agent comprises an organic macromolecule emulsion breaker, an inorganic flocculating agent, an organic quick-acting coagulant aid and an inorganic micropowder oil absorption agent. A sewage treatment method comprises the steps: sufficiently stirring sewage and the composite high-efficiency flocculating agent in a flocculation reaction device, and performing the reaction; and press filtering a solution to be treated after the sufficient reaction by virtue of a plate-frame press filtering machine, delivering a press-filtered filter cake to a qualified institution to treat as a dangerous waste, oxidizing and sterilizing a filtrate by virtue of ozone, precisely filtering, filtering by virtue of activated carbon, and then discharging the filtrate after reaching the standard. The CODcr removal rate in the sewage after being treated by virtue of the sewage treatment process can reach more than 95 percent; and moreover, the emulsion breaking and flocculation process is completed by virtue of one-time chemical dispensing in the flocculation reaction device, and the reaction time only needs 30 minutes, so that high efficiency and rapidness are realized. The sewage with the chemicals is oxidized by ozone and filtered by the activated carbon, and the outlet water can be discharged after reaching the standard.

Description

technical field [0001] The invention belongs to the sewage treatment technology, and particularly provides a high-efficiency composite flocculant suitable for treating fluorescent wastewater, a sewage treatment method and supporting sewage treatment equipment. Background technique [0002] As a tracer, fluorescent penetrant is widely used in the detection of precision parts in the aviation industry. The waste water produced during cleaning of the parts after testing contains a large amount of paraffin oil, ethoxylated alcohol, tributoxyethyl phosphate, secondary alcohol ethoxylate, surface dispersant, fluorescent agent and various additives. complex. The sewage containing the above substances has a high content of petroleum, CODcr, etc., and it is not easy to carry out later sewage treatment, especially the problem of demulsification has become a major problem in the treatment of fluorescent wastewater. [0003] At present, the aircraft manufacturing in the aviation indust...

AI Technical Summary

Problems solved by technology

Due to the difficulty and high cost of fluorescent wastewater treatment, it is difficult to meet the discharge standards. Due to strict environmental protection supervision, sewage generating units can only entrust sewage treatment plants for centralized treatment

However, in the face of high-concentration wastewater, especially the sewage containing high petroleum and CODcr such as fluorescent agents, sewage treatment plants cannot effectively treat it, and some treatment plants even adopt the method of diluting discharge to evade supervision in order to discharge sewage to meet standards

The above behaviors are not only detrimental to the healthy development of enterprises, but more importantly, the damage to the environment is irreversible, especially the wanton discharge of high content of reducing organic matter

[0005] Therefore, fluorescent wastewater has become a major hidden danger of environmental pollution.

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