Method for deeply treating micro-polluted source water through in-situ enrichment, immobilization and acclimatization of indigenous microorganisms

Abstract

The invention provides a method for deeply treating micro-polluted source water through in-situ enrichment, immobilization and acclimatization of indigenous microorganisms. In-situ enrichment and immobilization of the indigenous microorganisms are carried out in a stuffy aeration manner under an appropriate aeration condition by inoculating underwater bed sediment to be treated and water to be treated and adding nutrient elements; then, the immobilized microorganisms are gradually adapted to the water quality to be treated by arranging automatic water intake / discharge, gradually reducing the concentration of the nutrient elements in intake water and increasing the amount of intake / discharged water. The method disclosed by the invention has the following advantages: 1) under the stuffy aeration condition, loss of the microorganisms is avoided, multiplication of the indigenous functional microorganisms is accelerated, and the start time of the process is greatly shortened; 2) the multiplication of autotrophic nitrobacteria flora is preferably promoted by inoculating the underwater bed sediment having nitrobacteria flora of high abundance, adding ammonia nitrogen and reducing a carbon nitrogen ratio, and the diversity of the inoculated nitrobacteria flora is ensured by inoculating the underwater bed sediment having an appropriate depth, and therefore the operation stability of a system is promoted.

Description

technical field [0001] The invention belongs to the field of water treatment, and specifically relates to a method for in-situ enrichment, immobilization and domestication of indigenous microorganisms for advanced treatment of slightly polluted source water, which is applicable to the treatment of slightly polluted water sources, and is also applicable to other lakes (reservoirs), Advanced treatment of rivers and other surface water bodies and tail water. Background technique [0002] With the rapid development of my country's social economy, the discharge of pollutants is increasing year by year, and the problem of water pollution is serious. According to the 2014 Bulletin on the State of the Environment in China published by the Ministry of Environmental Protection, my country’s seven major river basins including the Yangtze River, Yellow River, Pearl River, Songhua River, Huai River, Hai River, and Liao River, as well as rivers in Zhejiang and Fujian, rivers in Northwest ...

AI Technical Summary

Problems solved by technology

Patent CN104445599A discloses a method for enhancing biofilm enrichment and stable operation performance of raw water biological pretreatment. This method starts raw water biological pretreatment under the condition of influent internal circulation operation mode and the addition of appropriate nutrients by inoculating polluted raw water At the same time, diatomite is added as an auxiliary carrier to form biological diatomite, and the retention of functional microorganisms endows the biological pretreatment process with efficient and stable operation performance. The start-up period of this method is only 16 days, but a large amount of diatomite needs to be added in this method. Increased operating costs, and the purpose of adding diatomaceous earth is to strengthen the formation of the internal porous structure of polyurethane fillers, that is to say, the effect of diatomaceous earth is only useful for polyurethane fillers, thus limiting its application range