Environmental protection process for treating xanthan gum fermentation wastewater

Abstract

The invention relates to an environmental protection process for treating xanthan gum fermentation wastewater. The environmental protection process comprises the following steps: xanthan gum industrial wastewater flows through a plurality of grids and is discharged into a sedimentation tank, the grid gaps of a plurality of the grids are gradually reduced, then an adsorbent is added to wastewater according to the adding amount which is 0.5kg per ton of wastewater to perform settlement treatment, and then anaerobic biochemical treatment-bioremediation through hydrolytic acidification. The bioremediation preparation disclosed by the application of the invention can improve the water treatment capacity and the treatment water quality to reduce the operation cost and promote the standardized discharge, and can further reduce the sludge production, is beneficial to the removal of pollutants such as COD and ammonia nitrogen in waste liquid, and has good application prospects.

Description

technical field [0001] The invention relates to the field of wastewater treatment in the biological fermentation industry, and specifically discloses an environmentally friendly process for treating xanthan gum fermentation wastewater. Background technique [0002] Xanthan gum fermentation wastewater is derived from several processes in the xanthan gum fermentation and extraction process. There are no toxic and harmful substances in the low-concentration wastewater. It is mainly the wastewater discharged from the rectification tower after recovering alcohol and equipment cleaning wastewater. The main pollutants are unused organic matter such as starch and protein. The composition of xanthan gum fermentation wastewater is relatively complex, mainly containing inorganic salts and a certain amount of sugars and small organic molecules. Most of them are bio-glue, which is a cellulose-like glue. Its structure is relatively stable, it is difficult to decompose, and biochemical ...

AI Technical Summary

Problems solved by technology

Activated carbon is widely used as an important adsorbent material because of its rich pore structure and huge specific surface area, good chemical stability and strong adsorption capacity, but its cost is high

There are also non-metallic ionic minerals such as attapulgite for adsorption, but natural non-metallic minerals have the following limitations as adsorbents: natural non-metallic minerals have high density and limited specific surface area, and the surface of natural non-metallic minerals is mostly negatively charged. And directly using natural non-metallic powder ore such as clay minerals as the adsorbent will have the problem of difficult separation of solid and liquid after adsorption

The applicant group company has been committed to the production method of xanthan gum with clean public relations for many years. It once disclosed the process of effectively treating the fermentation waste liquid, in which the microbial agent was used, and the treatment effect of COD, ammonia nitrogen, and SS was good, but there were strains in the agent There are too many types, which increases the possibility of bacterial strain pollution. The amount of bacterial agent used is too large. Each ton of sewage needs to add 0.5-1kg of physical adsorbent and 15-20g of bacterial agent, and the bacterial agent is easy to deposit on the bottom of the pool, causing flocculation , resulting in a large amount of sludge, which is difficult to clean up