Wastewater biochemical treatment method for simultaneously realizing sludge reduction

A biochemical treatment and sludge reduction technology, applied in water/sludge/sewage treatment, biological water/sewage treatment, sustainable biological treatment, etc. The effect of weight reduction, energy reduction, and efficient removal

Active Publication Date: 2015-04-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation method of embodiment 1 microbial bacterial agent

[0029] 1. Bacterial activation: The formula of the activating medium of Cochlear palustris FSDN-A is: beef extract: 8g / L, peptone: 12g / L, NaNO 2 : 0.5g / L, KNO 3 : 0.5g / L; the activation medium formula of Arthrobacter FDN-1 and Flavobacterium waterii FDN-2 is: beef extract: 5g / L, peptone: 10g / L, NaNO 2 : 1g / L, add 2.0% agar; the activation medium formula of denitrification paracoccus DN-3 is: KNO 3 : 1g / L, sodium succinate: 8g / L, KH 2 PO 4 :1g / L, FeCL 2 : 0.5g / L, add 2.0% agar; the activation medium formula of Methylobacterium SDN-3 is: ammonium sulfate: 0.5g / L, methanol: 0.75mL / L, KH 2 PO 4 :1g / L, FeCL 2 : 0.5g / L, add 2% agar. After spreading evenly on the plate, place it in a constant temperature incubator at a temperature of 30°C for activation.

[0030] 2. Use the inoculation loop to scrape the bacteria on the plate and inoculate them in the corresponding liquid culture solution respectivel...

Embodiment 2

[0032] Embodiment 2 Application in a certain wastewater treatment system

[0033] A wastewater treatment system is operated by SBR process, and the influent NH 3 -The average concentration of N is 447mg / L, the average concentration of total nitrogen (TN) is 492mg / L, COD Cr The average concentration is 161mg / L, and the main operating conditions are pH: 7~9, temperature: 20~38°C, dissolved oxygen concentration during aeration process is 1~3mg / L, dissolved oxygen concentration is controlled at 0.2~1mg during aeration and stirring process / L between. During operation, the removal rates of ammonia nitrogen and total nitrogen are 70% and 78% respectively, and a large amount of activated sludge is required to be discharged during normal operation. Discharge part of the activated sludge, the content of activated sludge in the system is 4000mg / hour, take a certain amount of microbial agents (Cockella palustris FSDN-A, Arthrobacter FDN-1 and Flavobacterium waterii FDN-2, denitrifica...

Embodiment 3

[0034] Example 3 Application in a certain catalyst production wastewater biochemical system

[0035] The quality of wastewater produced during the production of a certain catalyst is: COD concentration 800~1000mg / L, ammonia nitrogen concentration 150~300mg / L, pH 7~8. When the A / O system is used for long-term operation, the sludge concentration in the system is 6300mg / L, and its main operating conditions are pH: 7~8, temperature: 20~30℃, dissolved oxygen concentration in O pool is 2~4mg / L, A pool The dissolved oxygen concentration is controlled between 0.1~0.5mg / L. The removal rate of ammonia nitrogen is up to 80%, the removal rate of total nitrogen and COD is less than 50%, and a large amount of sludge needs to be discharged during normal operation. After a certain amount of sludge is discharged, when the sludge concentration in the system is 5000mg / L, the dosage of 2% by volume is added to the denitrification tank at one time. Bacillus FDN-1, Paracoccus denitrificans DN-3...

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PUM

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Abstract

The invention discloses a wastewater biochemical treatment method for simultaneously realizing sludge reduction. The method is mainly realized by adding a microbial preparation which has high degradation efficiency for organisms, ammonia nitrogen and total nitrogen and lower growth rate because of competition for a substrate in a colony into a sewage biochemical treating system. The microbial preparation contains Kocuriapalustris FSDN-A, Arthrobactercreatinolyticus FDN-1, Flavobacteriummizutaii FDN-2, Paracoccusdenitrificans DN-3 and Methylobacteriumphyllosphaerae SDN-3. By using the method, wastewater can be treated up to the standard, and meanwhile, the aim of reducing the yield of sludge can be achieved; and the method has the characteristics of safety, environment friendliness, simplicity in operation, remarkable effect, little influence to the function of the original system, no secondary pollution and the like.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering sewage biochemical treatment, and in particular relates to a method for controlling and reducing the sludge output of a waste water biochemical treatment system while treating waste water. Background technique [0002] Activated sludge method is one of the main methods of wastewater biochemical treatment at present, and it has been playing a huge role as the terminal treatment technology of wastewater. The biggest disadvantage of this method is the high sludge output. According to statistics, the national dry sludge output is about 8000t / d, and the wet sludge is about 40000t / d (moisture content 80%). With the increase of sewage treatment capacity and treatment degree The deepening of the sludge production will further increase. Sludge treatment and final disposal require a large amount of infrastructure investment and high costs, which generally account for about 40% to 60% of t...

Claims

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Application Information

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IPC IPC(8): C02F3/34C02F3/12C02F3/30
CPCY02W10/10
Inventor 高会杰张鹏刘忠生
Owner CHINA PETROLEUM & CHEM CORP
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