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Activated sludge culture method suitable for high-salt sewage

A technology for high-salt sewage and activated sludge, which is applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc. Plant operation and other issues, to achieve the effect of simple cultivation and low cost

Inactive Publication Date: 2012-06-20
TANGSHAN PORT DEV ZONE SEWAGE TREATMENT
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Existing activated sludge is mostly used for conventional industrial sewage and domestic sewage, but due to the infiltration of seawater in coastal areas, the chloride ion content in the sewage is relatively high. Conventional sludge is not suitable for this kind of high-salt sewage, which has become a problem The first-class problem in the operation of sewage treatment plants in many coastal towns

Method used

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  • Activated sludge culture method suitable for high-salt sewage
  • Activated sludge culture method suitable for high-salt sewage
  • Activated sludge culture method suitable for high-salt sewage

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Effect test

Embodiment 1

[0022] Embodiment 1: This activated sludge culture method suitable for high-salt sewage adopts the following process steps.

[0023] 1. Equipment and raw materials: the total effective pool capacity of the biochemical pool used is about 5400m 3 ;Water quality of high salinity sewage to be treated: PH: 6~9, COD 120mg / L, TP 1.8mg / L, TN 45mg / L, ammonia nitrogen 28mg / L, BOD 20mg / L, chloride 6000mg / L; The nutrients are configured from industrial grade glucose, phosphate fertilizer and urea, and its composition ratio is BOD 5 :N:P=100:5:1.

[0024] 2. The steps of cultivating and domesticating are:

[0025] (1) Poor exposure: put 200m in the biochemical pool 3 The seed mud (accounting for 3.7% of the tank capacity), then add sewage with a chloride ion concentration of 1000mg / L and a COD of 350mg / L until the biochemical tank is full, and carry out stuffy exposure; after 10 days, the degradation rate of COD reaches 45-55%, then stop Stuffy exposure: during the stuffy exposure peri...

Embodiment 2

[0028] Embodiment 2: This activated sludge cultivation method suitable for high-salt sewage adopts the following process steps.

[0029] 1, equipment and raw material are identical with embodiment 1.

[0030] 2. The steps of cultivating and domesticating are:

[0031] (1) Stuffed exposure: except that the amount of seed mud input accounts for 3.0% of the pool volume, the chlorine ion concentration of the added sewage is 500 mg / L, and the COD is 250 mg / L, the rest of the steps are the same as in Example 1;

[0032] (2) Intermittent water intake: In addition to the 2.0h static settling at the end of the boring exposure, the discharge of the supernatant accounts for 9.0% of the pool volume, and the injection of high-salt sewage accounts for 9.0% of the pool volume until the chloride ion concentration in the biochemical pool is equal to the chloride ion concentration of the high-salt sewage. Except 90.0%, all the other steps are identical with embodiment 1;

[0033] (3) Continuo...

Embodiment 3

[0034] Embodiment 3: This activated sludge culture method suitable for high-salt sewage adopts the following process steps.

[0035] 1, equipment and raw material are identical with embodiment 1.

[0036] 2. The steps of cultivating and domesticating are:

[0037] (1) Stuffed exposure: Except that the amount of seed mud input accounts for 5.0% of the pool volume, the chlorine ion concentration of the added sewage is 750mg / L, and the COD is 300mg / L, the rest of the steps are the same as in Example 1;

[0038](2) Intermittent water intake: In addition to the static settling for 1.0h at the end of the boring exposure, the discharge of the supernatant accounts for 18% of the pool volume, and the injection of high-salt sewage accounts for 18% of the pool volume until the concentration of chloride ions in the biochemical pool is equal to the concentration of chloride ions in high-salt sewage. Except 99%, all the other steps are identical with embodiment 1;

[0039] (3) Continuous ...

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Abstract

The invention discloses an activated sludge culture method suitable for high-salt sewage, and the culture method comprises the following steps of: (1) aeration; (2) intermittent water charging to improve chloride ion loading; (3) continuous water charging. Sewage with a low chloride ion concentration is cultured firstly; after activated sludge suitable for the low chloride ion concentration is successfully cultured, the chloride ion concentration is increased gradually (intermittent water charging); after activated sludge suitable for a high chloride ion concentration is generated, the hydraulic loading is increased (continuous water charging), and thus activated sludge which can treat high-salt sewage is obtained. The method can culture activated sludge which can treat sewage with a chloride ion concentration of below 7000 mg / L; the sludge concentration reaches 2500-4000 mg / L; certain removing effect on COD, TN, ammonia nitrogen, and the like is realized; and the effluent quality meets the national discharge grade one B standard. The invention effectively solves the problem of difficult biochemical treatment of high-salt municipal sewage in coastal regions, and has the characteristics of simple culture and low cost.

Description

technical field [0001] The invention relates to the field of sewage biochemical treatment, in particular to an activated sludge cultivation method suitable for high-salt sewage. Background technique [0002] Nowadays, due to the rapid development of modern industry, the pollution of water resources is becoming more and more serious, and how to effectively treat sewage has been paid more and more attention. The activated sludge method is the main method of sewage biological treatment with activated sludge as the main body. The activated sludge method is to continuously inject air into the sewage, and after a certain period of time, the sludge-like flocs are formed due to the reproduction of aerobic microorganisms; on it, there are microbial groups mainly composed of bacterial micelles, which have strong The ability to adsorb and oxidize organic matter. [0003] Existing activated sludge is mostly used for conventional industrial sewage and domestic sewage, but due to the in...

Claims

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Application Information

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IPC IPC(8): C02F3/12
CPCY02W10/10
Inventor 刘玉宽王瑞明张贺满朱蕾王江波康世静李红双
Owner TANGSHAN PORT DEV ZONE SEWAGE TREATMENT
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