Rapid culture method of simultaneous desulfidation and denitrogenation granular sludge

Abstract

The invention discloses a rapid culture method of simultaneous desulfidation and denitrogenation granular sludge. The method is characterized in that an upflow anaerobic sludge bed reactor is adopted, anaerobic ammoxidation granular sludge and methanogenesis granular sludge are adopted as inoculation sludge, model wastewater containing ammonia nitrogen and nitrite nitrogen is adopted as inlet water, and the method comprises the following steps: adding sulfide into the model wastewater, adding inorganic salts and trace elements for maintaining the growth of microbes, gradually improving the concentrations of matrixes in the inlet water and / or shortening the hydraulic retention time in order to adjust the running of the reactor, and culturing under anaerobic and shady conditions at 30-37DEG C under the pH value of the inlet water of 7.5-8.0. The sludge obtained in the invention has the advantages of obvious granularity, strong impact resistance, high processing efficiency, saving of the occupied are through cooperating with a UASB reactor, simplification of the desulfidation and denitrogenation process, and low investment and running cost, and is suitable for treating wastewater containing ammonia nitrogen, nitrite nitrogen and sulfides of the light industry, the pharmacy industry, the oil refining industry and the leather making industry.

Description

(1) Technical field [0001] The invention relates to a cultivation method of wastewater treatment granular sludge, in particular to a rapid cultivation method of synchronous denitrification and desulfurization granular sludge. (2) Background technology [0002] In recent years, water pollution has become a serious problem. Excessive nitrogen-containing pollutants entering water bodies not only lead to frequent outbreaks of eutrophication in water bodies, but also endanger aquatic organisms and destroy ecological balance. At the same time, wastewater rich in sulfate, such as petroleum, pharmaceutical, leather, landfill leachate, etc., produces a large number of toxic by-products during anaerobic treatment, mainly sulfide, because of its corrosiveness, biological toxicity and easy release of toxic H of foul odor 2 S gas is harmful to human health and environmental quality. The above-mentioned secondary pollutants need to be treated in depth before the wastewater is discharged...

AI Technical Summary

Problems solved by technology

However, like other autotrophic microorganisms, the microbial activity and its biomass are the bottlenecks restricting its treatment efficiency

First, the growth of anammox bacteria is slow; second, the sulfide itself will inhibit the anammox microorganisms, and too high a concentration of sulfide may even lead to the death of anammox bacteria

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