Integrated processing technique for retting-hemp waste water and equipment thereof

Abstract

The invention discloses an integrated treatment process for ramie degumming wastewater and a device thereof. The process comprises a regulating pre-precipitation step, an iron-copper reduction step, an anaerobic treatment step, an aerobic treatment step, a deaeration treatment step and a clarification step. The device comprises a casing, wherein the casing is internally equipped with an anaerobic treatment device and an aerobic treatment device which are mutually communicated, two sides of the casing are provided with a water inlet pipe and a water outlet pipe, a deaeration water inlet device and a clarification device are sequentially communicated between the aerobic treatment device and the water outlet pipe, and the clarification device is communicated with the water outlet pipe. The anaerobic treatment device comprises an iron-copper reduction bed and a baffled anaerobic filter bed which are mutually communicated. The aerobic treatment device comprises an aeration tank, and the bottom portion of the aeration tank is provided with an aerator. The clarification device is internally provided with a macroporous packed bed which is filled with fillings. The integrated treatment process for ramie degumming wastewater and the device treat the discharged water which can meet national discharge standard of class I of integrated wastewater discharge standard, with perfect integration, and the device can be combined to be an integral device with low investment and operation costs and high treatment efficiency.

Description

technical field [0001] The invention relates to the field of production wastewater treatment produced in the hemp degumming process, in particular to an integrated treatment process and equipment for hemp degumming wastewater. Background technique [0002] At present, most of the hemp manufacturers in my country use chemical degumming. The chemical degumming method uses NaOH to cook the ramie under high temperature and certain pressure to remove the colloidal substance in the ramie fiber. After degumming, the ramie is processed into fine dry numb. Dry hemp can be used as fiber for spinning and weaving. [0003] Ramie chemical degumming wastewater has the characteristics of high concentration, high chroma, high alkalinity and high water temperature. Its composition is complex and contains a large amount of refractory organic matter. Degumming wastewater can be divided into three categories. The first category is boiling water with extremely high concentration. Its COD valu...

AI Technical Summary

Problems solved by technology

However, the wastewater treated by this method has not reached the first-level discharge standard of the "Integrated Wastewater Discharge Standard" (GB8978-1996), and cannot be discharged directly to the outside, and the equipment involved in this method is not highly integrated, and equipment production cannot be realized. efficiency is not high

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