Intensified biological treatment method for sewage containing polyacrylamide (PAM)

A technology of polyacrylamide and bioaugmentation, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems that it is difficult to obtain long-term and effective treatment effects, and achieve long-term The effect of effective treatment effects

Inactive Publication Date: 2011-09-07
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the screened degrading bacteria are put into the treatment system as exogenous microorganisms to strengthen the treatment of polyacrylamide-containing wastewater, it is difficult to obtain long-term and effective treatment effects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0014] Specific embodiment one: the bioaugmentation treatment method of polyacrylamide-containing sewage in this embodiment is realized according to the following steps: one, get the activated sludge of domestic sewage plant, add in the SBR reactor, the sludge concentration is 2000mg / L, The influent is domestic sewage, add PAM concentration to 20mg / L, and COD is 200-300mg / L; 2. Every time the SBR reactor runs for a cycle, the PAM concentration is increased by 20mg / L until it rises to 100mg / L, and continues to run for 20 Days to complete domestication; 3. According to 1×10 8 per L reaction volume, add HWBI into the domesticated SBR reactor, when the dissolved oxygen concentration is 2-3mg / L, the pH value is 6.5-8.0, the PAM concentration is 100-150mg / L, and the sludge concentration is After 45 days of operation under the condition of 1500~2000mg / L, the bioaugmentation treatment of polyacrylamide-containing sewage is completed; the operating conditions of each cycle of SBR react...

specific Embodiment approach 2

[0018] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that enrichment culture needs to be carried out before adding HWBI in step 3. The enrichment medium used is dissolved in 1g of beef extract, 10g of peptone and 5g of NaCl. Composed of 1000mL distilled water, pH value is 7.2~7.4. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0019] Specific embodiment three: the difference between this embodiment and specific embodiment one is that in step three, the dissolved oxygen concentration is 2.5 mg / L, the pH value is 7.0, the PAM concentration is 120 mg / L, and the sludge concentration is 1800 mg / L. Down run for 45 days. Other steps and parameters are the same as those in Embodiment 1.

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Abstract

The invention discloses intensified biological treatment methods for sewage containing polyacrylamide (PAM), and relates to methods for treating the sewage containing polyacrylamide. The methods 1 and 2 comprise the following steps of: 1, putting activated sludge into an SBR (Sequencing Batch Reactor); 2, performing sludge acclimatization on the SBR reactor; and 3, putting HWBI (Bacillus cereus)or HWBIV (Stenotrophomonas acidaminiphila) into the acclimatized SBR reactor. The methods 3 and 4 comprise the following steps of: 1, putting the activated sludge into the SBR reactor; 2, performing sludge acclimatization on the SBR reactor; 3, putting the acclimatized sludge into a bio-contact oxidation reactor for acclimatization; and 4, putting the HWBI or the HWBIV into the acclimatized bio-contact oxidation reactor. In the invention, after the HWBI or the HWBIV is put into the SBR reactor, the removal rate of the PAM reaches 70 to 75 percent; and after the HWBI or the HWBIV is put into the bio-contact oxidation reactor, the removal rate of the PAM reaches 70 to 75 percent or 65 to 70 percent.

Description

technical field [0001] The invention relates to a treatment method for sewage containing polyacrylamide. Background technique [0002] In recent years, since most major onshore oilfields in my country have entered the mid-to-late stage of development, the use of polymer flooding (adding a certain amount of high molecular weight polyacrylamide to the injected water) has become the most widely used tertiary oil recovery technology. In 2000, the oil production of polymer flooding reached 9×10 5 t above, accounting for 17% of the year's oil production. By 2010, the annual demand for polyacrylamide (PAM) in my country's oil exploration industry will reach 10 5 to 1.1×10 5 Ton. With the promotion of polymer flooding tertiary oil recovery technology and the increasing difficulty of oil displacement, more and more polyacrylamide is discharged with the produced water. The produced water of most oil areas in my country contains 30-100mg / L polyacrylamide . Since the current oilfie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/30
Inventor 温沁雪陈志强张慧超
Owner HARBIN INST OF TECH
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