Methods to Prevent the Loss of Microorganisms in Sewage Plants
A technology of microorganisms and sewage plants, applied in the field of sewage treatment, can solve problems such as instability, mixing of toxic substances, and rising maintenance costs, and achieve the effects of improving stability, improving adhesion, and eliminating loss
Inactive Publication Date: 2016-08-24
唐山城市排水有限公司
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Problems solved by technology
[0002] During the operation of the activated sludge method in the sewage treatment industry, many sewage plants are designed according to domestic sewage treatment, but some sewage plants contain about 80% of industrial waste water and the water quality It is extremely unstable, and sometimes there will be abnormal conditions, so that the accumulated branch insects will be lost together with the effluent of the secondary sedimentation tank. Difficult to handle, greatly increasing the maintenance cost and reducing the effect of sewage treatment
This situation during operation may be caused by the high temperature of industrial wastewater and the contamination of toxic substances in the sewage.
Method used
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[0021] By collecting and sampling the sludge from the oxidation ditch, distributing it into different containers with large volumes, adding and stirring the medicine, and then checking the number of sticky white biological flakes floating out of the supernatant with microorganisms such as cloverworms, In order to obtain the effect under different proportions of medicament addition.
[0022] The composite flocculant is composed of chitosan, cationic polymer sodium salt, iron metasilicate, and aluminum salt. The mass ratio of the above three is: 1:2:3.
[0023]
[0024] In July 2013, Fengnan Liyuan Sewage Co., Ltd. found that a large amount of white flake viscous flow was lost in the secondary sedimentation tank. After laboratory analysis, it was found that the white flakes contained a large number of microorganisms such as clumpworms, which caused oxidation ditch microorganisms. Reduced, the effect of sewage treatment is reduced, and the sticky matter lost with the water wil...
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The invention relates to a method for sewage treatment and particularly relates to a method for preventing loss of microbes of a sewage plant. The method is performed according to the following steps: adding polyaluminum chloride and a composite flocculant into a sewage tank, wherein the mass ratio of sludge to polyaluminum chloride to the composite flocculant in the sewage tank is 100000: (3-9): (1-7), and in the process of adding the two medicines, the medicines are added while being stirred; and observing the loss phenomenon of the microbes after three days. Compared with the prior art, by adopting the method provided by the invention, polyaluminum chloride and the composite flocculant are added into the sewage tank, so that the stability and adhesion of the activated sludge are improved, flocculation of the sludge in an oxidation ditch is achieved, solidification of epistylis and other microbes on the sludge is realized, and the loss phenomenon of the epistylis and other microbes caused by great discharge from a secondary sedimentation tank is eliminated.
Description
technical field [0001] The invention relates to a method for treating sewage, in particular to a method for preventing microbial loss in sewage plants. Background technique [0002] During the operation of the activated sludge method in the sewage treatment industry, because many sewage plants are designed according to domestic sewage treatment, but some sewage plants contain about 80% of industrial waste water and the water quality is extremely unstable. The effluent of the secondary sedimentation tank is lost in clusters, and the lost bacteria clusters are white flocs with a certain degree of viscosity. It is very easy to cause blockage of subsequent equipment such as filters and reverse osmosis, and it is difficult to handle, which greatly increases the maintenance cost and reduces the sewage treatment effect. . This situation during operation may be caused by the high temperature of industrial wastewater and the contamination of toxic substances in the sewage. Content...
Claims
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IPC IPC(8): C02F1/52C02F1/56
CPCC02F1/52C02F1/5209C02F1/5245C02F1/56C02F11/004C02F2101/00C02F2103/00
Inventor 王允占李柏坤张学谦侯琨琨张善新周海燕
Owner 唐山城市排水有限公司