Method of treating traditional Chinese medicine wastewater by utilizing modified fly ashes and photocatalyst

Abstract

The invention relates to a method of treating traditional Chinese medicine wastewater by utilizing modified fly ashes and a photocatalyst. The method specifically comprises the following steps of: modifying fly ashes by utilizing an activator, roasting, and the like, wherein each modified fly ash is used for carrying out original fluid pre-treatment onto the traditional Chinese medicine wastewater in sequence; carrying out photocatalytic degradation onto the pre-treated traditional Chinese medicine wastewater under radiation of sunlight, wherein the used photocatalyst is obtained by loading TiO2 / Cu2O with the fly ashes; finally, carrying out flocculating settling onto the catalyzed water by a flocculating agent prepared by fly ashes. Fly ashes, waste scrap iron, industrial waste acid, and the like, are used as main materials, so that treatment cost of the traditional Chinese medicine wastewater can be effectively lowered, and secondary pollution can also be avoided; during treatment, the composite photocatalyst with efficient catalytic degradation ability in the sun is used, so that decomposition time of organic pollutants is effectively shortened, and the photocatalyst can be recycled for repeated catalysis by loading the photocatalyst with the fly ashes; wastewater treatment scale can be large and small, and ferric aluminum polysilicate can be prepared on the scene according to actually generated wastewater amount and characteristics of the wastewater.

Description

technical field [0001] The invention relates to a pharmaceutical wastewater treatment process, in particular to a method for treating traditional Chinese medicine wastewater by using modified fly ash and a photocatalyst. Background technique [0002] Traditional Chinese medicine wastewater mainly comes from production workshops, major Chinese medicine hospitals and traditional Chinese medicine dispensaries, and is produced in the process of washing and cooking medicinal materials, washing, preparations, etc. Traditional Chinese medicine wastewater includes raw drug washing water in the production process, raw drug juice residue, sewage generated in unit operations such as filtration, distillation, and extraction, production equipment washing, floor flushing water, steam condensate water, and ion exchange resin acid-base solution neutralized water, etc. [0003] Pollutants in traditional Chinese medicine wastewater can be roughly divided into two categories: one is water-sol...

AI Technical Summary

Problems solved by technology

When the above application is used for the treatment of traditional Chinese medicine wastewater, although this process can separate and dispose of pollutants and convert and decompose harmful substances, this process requires long-term exposure to the air for microbial decomposition, which occupies a large area and takes a long time , the efficiency of wastewater treatment is low, and a large amount of organic matter is exposed to the air for a long time, and even produces secondary pollution to the surrounding environment

Usually, in the processing of traditional Chinese medicine, the organic acid enters the wastewater, which will make the wastewater present an acidic buffer system, which is not conducive to the survival of the bacteria in the biodegradation, and even leads to the death of a large number of microorganisms, resulting in an unsatisfactory wastewater treatment effect.

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