A rapid cultivation method for synchronous denitrification and desulfurization granular sludge
A cultivation method, technology of sulfur particles, applied in the field of rapid cultivation of simultaneous denitrification and desulfurization granular sludge, can solve the problem of microbial activity and its biomass restricting treatment efficiency, slow growth of anammox bacteria, anammox bacteria Death and other problems, achieving the effects of obvious sludge granularity, low investment and operation costs, and saving floor space
Active Publication Date: 2017-06-13
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 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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Embodiment 1
[0032] The rapid cultivation of the 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, and the main purpose is the enrichment and screening of denitrification and desulfurization microorganisms. ; The second stage is the enrichment stage of high-efficiency denitrification and sulfur removal by changing the water quality and hydraulic load.
[0033] 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. Its 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: EDTA 6.25mg·L -1 , FeSO 4 11.43mg·L -1 ; Trace element Ⅱ: ...
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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
[0001] (1) Technical field [0002] The invention relates to a method for culturing granular sludge from wastewater treatment, in particular to a method for rapid culturing of granular sludge for simultaneous denitrification and desulfurization. [0003] (2) Background technology [0004] In recent years, the problem of water pollution has been serious. Too many nitrogenous pollutants enter the water body, which not only causes frequent outbreaks of eutrophication in the water body, harms aquatic organisms and destroys the ecological balance. At the same time, sulphate-rich wastewater such as petroleum, pharmaceuticals, tannery, landfill leachate, etc. produces a large number of toxic by-products in the anaerobic treatment process, mainly sulfides, which are corrosive, biologically toxic and easy to escape. Malodorous H 2 S gas is harmful to human health and environmental quality. The above-mentioned secondary pollutants need to be treated in depth before wastewater is discharged. ...
Claims
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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