Rapid culture method of simultaneous desulfidation and denitrogenation granular sludge

A cultivation method and technology of sulfur particles are applied in the field of rapid cultivation of granular sludge for simultaneous denitrification and sulfur removal, and can solve the problems of death of anammox bacteria, microbial activity and biomass restriction of treatment efficiency, and growth of anammox bacteria. Slow and other problems, to achieve the effect of low investment and operation cost, obvious sludge granularity, and saving floor space

Active Publication Date: 2015-09-09
HANGZHOU NORMAL UNIVERSITY
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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

Method used

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  • Rapid culture method of simultaneous desulfidation and denitrogenation granular sludge

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Embodiment 1

[0027] The rapid cultivation of a synchronous denitrification and desulfurization granular sludge of the present invention mainly includes two stages: the first stage is the synchronous denitrification and desulfurization sludge cultivation stage, the main purpose is the enrichment and screening of denitrification and desulfurization microorganisms ; The second stage is to realize the enrichment stage of high-efficiency denitrification and desulfurization granular sludge by changing the water quality and hydraulic load.

[0028] The first stage is the simultaneous denitrification and desulfurization sludge cultivation stage. The simulated wastewater containing inorganic salts, trace elements, and sulfides is used as the influent. The composition is as follows (the content of each component is calculated by the volume of simulated wastewater), inorganic salt: 0.027 g·L -1 KH 2 PO 4 , 0.3g·L -1 MgSO 4 ·7H 2 O, 0.14g L -1 CaCl 2 ;Trace element Ⅰ: EDTA6.25mg·L -1 , FeSO 4...

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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...

Claims

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Application Information

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IPC IPC(8): C02F3/28
CPCY02E50/30
Inventor 金仁村郭琼徐嘉丽黄梅陈倩倩姜晓燕
Owner HANGZHOU NORMAL UNIVERSITY
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