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Method for inhibiting anaerobic fermentation of sludge to generate hydrogen sulfide
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A sludge anaerobic fermentation, anaerobic fermentation technology, applied in the direction of chemical instruments and methods, sludge treatment, biological sludge treatment, etc., can solve the problem of increasing the release of organic matter, reduce activity, promote safe and effective technology, Promote the effect of promotion
Inactive Publication Date: 2019-09-06
HUNAN UNIV
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[0006] Potassium permanganate is a typical and widely used oxidant, which has the advantages of low price, strong oxidizing ability, safe and convenient operation and use, etc. It can effectively promote the breakdown of sludge cells and increase the release of organic matter. Therefore, previously, high Potassiummanganate is widely used in the removal of pollutants in sewage, dehydration of sludge, anaerobic fermentation to produce volatile fatty acids and hydrogen, however, so far, the use of potassium permanganate to inhibit sludge anaerobic fermentation studies have not been reported
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Embodiment example 1
[0023] (1) In a plexiglass container with a working volume of 4L, the sludge produced by the municipal sewage treatment plant is placed at 4°C to naturally settle for 1d, and the supernatant is removed to obtain the fermentation raw material.
[0024] (2) Put 500mL of the sludge obtained in (1) into the reactor, add 0.05g / g TSS potassium permanganate, stir evenly, fill the reactor with nitrogen, continue for 5min to remove oxygen, seal The reactor is put into a shaker for anaerobic fermentation, where the shaker fermentation temperature is 35±1℃, the shaking speed is 120rpm / min, the fermentation time (that is, the residence time of the sludge in the reactor) is 4d, the hydrogen sulfide The output is 95.2381*10 -4 mg / g VSS.
Embodiment example 2
[0026] (1) In a plexiglass container with a working volume of 4L, the sludge produced by the municipal sewage treatment plant is placed at 4°C to naturally settle for 1d, and the supernatant is removed to obtain the fermentation raw material.
[0027] (2) Put 500mL of the sludge obtained in (1) into the reactor, and add 0.05g / g TSS sodiumdodecylbenzenesulfonate, stir evenly, and fill the reactor with nitrogen for more than 5 minutes Remove oxygen, seal the reactor and put it in a shaker for anaerobic fermentation, where the shaker fermentation temperature is 35±1℃, the shaking speed is 120rpm / min, and the fermentation time (ie the residence time of the sludge in the reactor) is 8d , The output of hydrogen sulfide is 120.6349*10 -4 mg / g VSS.
Embodiment example 3
[0029] (1) In a plexiglass container with a working volume of 4L, the sludge produced by the municipal sewage treatment plant is placed at 4°C to naturally settle for 1d, and the supernatant is removed to obtain the fermentation raw material.
[0030] (2) Put 500mL of the sludge obtained in (1) into the reactor, add 0.1g / g TSS potassium permanganate, stir evenly, fill the reactor with nitrogen for 5 minutes to remove oxygen, and seal The reactor is put into a shaker for anaerobic fermentation, where the shaker fermentation temperature is 35±1℃, the shaking speed is 120rpm / min, the fermentation time (that is, the residence time of the sludge in the reactor) is 4d, the hydrogen sulfide The output is 7.61905*10 -4 mg / g VSS.
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Abstract
The invention relates to a method for inhibiting anaerobic fermentation of sludge to generate hydrogensulfide by adding potassiumpermanganate (a typical oxidant). The method specifically includes the steps that 1, natural sedimentation treatment is carried out on primary precipitationsludge and excess sludge generated by an urban sewage treatment plant, and supernate is removed to be concentrated to obtain a fermentationraw material; 2, the potassiumpermanganate is added into the fermentationraw material for anaerobic fermentation to inhibit generation of hydrogensulfide. After the sludge is treated with the potassiumpermanganate, sulfate reducing bacteria are remarkably influenced, the activity of microbial enzyme is greatly inhibited, and the generation of the hydrogensulfide inthe anaerobic fermentation process of the sludge can be greatly inhibited. By means of simple, cheap and effective operation, the generation of the toxic and harmful gas, namely hydrogen sulfide, inthe anaerobic fermentation treatment of the sludge is reduced, and the method has important significance in sludge treatment and disposal.
Description
Technical field [0001] The invention belongs to the technical field of environmental protection and sludge treatment resource utilization, and specifically relates to a method for inhibiting anaerobic fermentation of sludge to produce hydrogen sulfide by adding potassium permanganate. [0002] technical background [0003] In order to treat the increasing amount of domestic wastewater, the number of urban sewage treatment plants in my country is growing rapidly. Among them, most of the sewage treatment plants adopt the activated sludge method to treat sewage. Therefore, while achieving the discharge of sewage up to the standard, a large amount of primary sludge and excess sludge will inevitably be produced. Due to the uneven source of sewage, it may contain various pollutants. These substances pass through the municipal pipe network and finally enter the sewage treatmentplant, where they are attached to the concentrated sludge in large quantities. In addition, the remaining sludg...
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