Broad-spectrum biochemical sludge bulking control chemical and preparation method

A biochemical sludge, broad-spectrum technology, applied in chemical instruments and methods, sludge treatment, biological water/sewage treatment, etc. High safety, improving microbial enzyme activity, and long-lasting inhibitory effect

Active Publication Date: 2017-09-19
NANJING UNIV YANCHENG ENVIRONMENTAL PROTECTION TECH & ENG RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In view of the problem of sludge bulking in the existing biochemical system, the traditional dosing technology is prone to the defects of killing normal bacteria, causing secondary pollution, and poor treatment effect, and has a non-broad spectrum. It is necessary to determine the pollution before use. Mud bulking type and environment, the treatment process is more cumbersome

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  • Broad-spectrum biochemical sludge bulking control chemical and preparation method
  • Broad-spectrum biochemical sludge bulking control chemical and preparation method
  • Broad-spectrum biochemical sludge bulking control chemical and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A broad-spectrum control biochemical sludge bulking agent of this embodiment is prepared by the following steps:

[0044] a) Preparation of iron ion salt solution: FeSO 4 ·7H 2 O and FeCl 3 ·6H 2 O is dissolved in water at a molar ratio of 1:1, and is configured into a solution containing iron ion concentration of 5mmol / L for subsequent use;

[0045] b) Activated carbon activation treatment: Soak 20 μm powdered activated carbon in 8% sodium hydroxide solution for 12 hours, rinse repeatedly with distilled water until neutral, then dry it, then soak it in 8% hydrochloric acid solution for 12 hours, rinse with distilled water Rinse repeatedly until neutral, dry naturally and place in an oven at 105°C for 10 hours, then cool naturally for later use;

[0046] c) mixed reaction and aging: the iron ion solution obtained in step a), the activated carbon obtained in step b) are mixed with graphene powder, wherein the iron element, activated carbon and graphene powder in the ...

Embodiment 2

[0057] A broad-spectrum control biochemical sludge bulking agent of this embodiment is prepared by the following steps:

[0058] a) Preparation of iron ion salt solution: FeSO 4 ·7H 2 O and FeCl 3 ·6H 2 O is dissolved in water in a molar ratio of 3:7, and is configured into a solution containing iron ions 5mmol / L for subsequent use;

[0059] b) Activated carbon activation treatment: Soak 20 μm powdered activated carbon in 8% sodium hydroxide solution for 12 hours, rinse repeatedly with distilled water until neutral, then dry it, then soak it in 8% hydrochloric acid solution for 12 hours, rinse with distilled water Rinse repeatedly until neutral, dry naturally and place in an oven at 105°C for 10 hours, then cool naturally for later use;

[0060] c) mixed reaction and aging: the iron ion solution obtained in step a), the activated carbon obtained in step b) are mixed with graphene powder, wherein the iron element, activated carbon and graphene powder in the iron ion salt so...

Embodiment 3

[0068] The preparation steps of the medicament of this embodiment are basically the same as in Example 1, except that: (1) the iron element, activated carbon, and graphene quality in the active ingredients of the medicament granules obtained in this embodiment are respectively 52% of the total mass: 4.6%: 0.49 %; (2) The medicament material model that screened out is FC-200.

[0069] The medicament prepared in this example is used to treat the sludge bulking produced by a sewage treatment pilot project in an industrial park in Jiangsu. The above-mentioned treatment system adopts the "hydrolysis acidification + aerobic" process, and the treatment capacity is 10 tons per day. Sludge bulking, SV 30 The highest is 58%, SVI is about 250mL / g.

[0070] The FC-200 type agent prepared in this example is directly added to the aerobic tank, and the dosage is 0.5‰ of the sewage quality. After 5 minutes of reaction, the SV 30 reduced to 21%, the SVI was 92mL / g, after 15 days, a re-dosing o...

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Abstract

The invention discloses a broad-spectrum biochemical sludge bulking control chemical and a preparation method and belongs to the technical field of biochemical sewage treatment. The chemical is prepared from an iron ion salt solution, activated carbon and graphene which are reacted with an alkali solution, and a final component includes a mixture of iron oxide, activated carbon and graphene. The chemical smartly combines an efficient graphene electron conduction function, biocompatibility of activated carbon, electron neutralization of iron ions and a flocculation function; and in addition, the chemical takes the advantages of functions such as magnetic attraction and self gravity compression of the iron oxide, multiple functions are applied to sewage bulking control, and thus the chemical has the advantages of being rapid in effect taking, free of secondary pollution, long-lasting in inhibition function, good in broad-spectrum property and the like.

Description

technical field [0001] The invention belongs to the technical field of sewage biological treatment, and in particular relates to a broad-spectrum biochemical sludge bulking control agent and a preparation method. Background technique [0002] Most of the current wastewater treatment process adopts the activated sludge treatment process. The most critical step in the treatment process is the separation of sludge and treated wastewater. Since the separation is mainly through gravity sedimentation, the speed of sludge sedimentation directly affects the operation of the system. Stability also plays a vital role in the processing effect. However, if sludge settlement is difficult or sludge bulking occurs during the treatment process, it will directly affect the normal operation of the system. [0003] Sludge bulking is specifically manifested as sludge volume expansion, water content rises, and it is not easy to settle. Generally, it has the following characteristics: (1) High o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F11/00
Inventor 丁新春刘波李爱民戴建军
Owner NANJING UNIV YANCHENG ENVIRONMENTAL PROTECTION TECH & ENG RES INST
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