A method using white-rot fungus and carrier to process persistent wastewater

Abstract

The invention is a method using white-rot fungus and carrier to process persistent wastewater which belongs to the field of water treatment technology. It first uses the carrier to absorb COD in wastewater, then uses the carrier to provide cellulose stimulating substrate to the white-rot fungus for its enzyme production, processes the persistent substance adsorbed on the carrier, selects different natural products as the core materials of the carrier, and produces the carrier coat after NaOH treatment. When handling the waste water, it adjusts the initial wastewater pH, adds the carrier and white-rot fungi, and takes the water sample into the conical flask; places the sample in the shaking table with the temperature of 35-60 DEG C and shaking speed of 170rpm for processing. The treatment process of the invention only needs to adjust the initial pH, has no operation during the middle process and does not need re-adjustment for subsequent treatment; the carrier used with a wide variety of sources can be treated directly as the fertilizer together with the bacteria after use, and has no secondary pollution; it has apparent decolorization effect after processing with the decolorization rate of above 90%.

Description

technical field [0001] The invention belongs to the technical field of water treatment, in particular to a method for treating high-concentration refractory wastewater by using white rot fungi and carriers. Background technique [0002] With the development of my country's economy and the increase of social demand, the amount of sewage discharge is increasing day by day, among which the amount of industrial wastewater is increasing rapidly. In recent years, with the increase in demand for chemical products, chemical wastewater has also increased. These waters not only contain tens of thousands of milligrams per liter of COD, but also have high chroma. Some wastewater contains a variety of biologically toxic heavy metal ions and substances that inhibit microbial growth, which not only puts a lot of pressure on the environment, but also increases the Difficulty with biological treatment. How to deal with this type of wastewater has become a major problem in current environme...

AI Technical Summary

Problems solved by technology

[0005] In recent years, both at home and abroad have realized that maintaining the dominant position of white rot fungi in the reactor is the key issue of using white rot fungi to treat wastewater. Many studies have devoted themselves to using materials that inhibit bacterial growth as carriers to achieve this goal, but this It is difficult to maintain a stable treatment effect in actual use, and most of them need to control the nitrogen source to achieve the goal

This will not only add an extra burden, but also is not easy to operate in practical applications

[0006]Patent CN1608755A adopts a two-stage treatment method to separate the growth and degradation stages of white rot fungi, so that the advantages of white rot fungi in the reactor can be maintained, and It can maintain a high enzyme activity, although it can achieve a good treatment effect, but the reactor load capacity is not high, and the time is long; although the problem of mud-water separation is solved, because it cannot be treated continuously, it occupies a large area. Not conducive to actual promotion

[0007] Patent CN1793354A adopts the inert carrier with the best antibacterial effect - polyurethane foam carrier, which can maintain the advantages of white rot fungi and achieve a good decolorization effect, but The use of this kind of carrier will become a new refractory waste after being discarded, and it needs to be combined with a culture medium specially inhibiting bacteria. It is difficult to achieve a stable treatment effect in continuous use in an open system, and for other industries with more complex components Whether the waste water has a good treatment effect remains to be confirmed