Granule sludge and biological film coupled integrated sewage treatment method and treatment device suitable for same

The technology of a sewage treatment device and a sewage treatment method is applied in the field of a granular sludge biofilm coupling integrated sewage treatment method and its treatment device, which can solve the problem that a high-speed anaerobic biological treatment system cannot solve the problem of N, P removal, N, P The removal effect is not ideal, affecting the treatment effect of the system, etc., to achieve the effect of reducing sludge discharge, compact structure and high removal efficiency

Active Publication Date: 2014-10-01
太原大学
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Problems solved by technology

Although the high-speed anaerobic reactor can greatly reduce the amount of aeration (without aeration) and the amount of residual sludge (the sludge output is 1 / 5 to 1 / 10 of the aerobic system), but at the same time new problems have emerged: high-speed Anaerobic biological treatment system cannot solve the problem of N and P removal
[0005] Anaerobic expanded granular sludge bed (EGSB) reactor has the characteristics of high sludge concentration and good mass transfer effect, and does not require aeration, the amount of residual sludge is small, and can efficiently remove organic pollutants, which are difficult to degrade the toxicity Pollutants also have a good removal effect, but almost no removal of N and P, and the removal effect of SS is not ideal
Some researchers proposed to add an aerobic membrane bioreactor after the EGSB reactor to strengthen the removal of N, P, chroma and turbidity, etc., but there is a shortage of a large amount of aeration that requires a lot of energy consumption, and the N, P The removal effect is also not ideal (because of the accumulation of metabolites between the two-stage reactors, which in turn affects the treatment effect of the entire system)
Some researchers also proposed to add a membrane module to the EGSB reactor to form an anaerobic membrane bioreactor, and strengthen the removal of N through micro-aerobic aeration, but this method did not solve the problem of P removal in the end.
Some researchers also proposed to form an aerobic-anoxic-anaerobic compound environment through micro-aerobic aeration, relying on the granular sludge in the EGSB reactor, so as to achieve the purpose of synchronously removing COD, N and P, but N and P, especially The removal effect of P is still not good
[0006] For the removal of N, although various reaction mechanisms such as synchronous nitrification and denitrification and short-cut nitrification and denitrification have been proposed, sufficient assurance of anoxic and aerobic environments is still the key; for the removal of P, denitrification and phosphorus removal have also appeared. , anaerobic phosphorus removal and other mechanisms, but it still needs to be combined with anaerobic phosphorus release and aerobic phosphorus uptake by phosphorus removal bacteria to achieve the desired effect

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  • Granule sludge and biological film coupled integrated sewage treatment method and treatment device suitable for same

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Experimental program
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Effect test

Embodiment 1

[0052] The structure of the granular sludge biofilm coupling integrated sewage treatment device is as follows: figure 1 As shown, it consists of a reactor 6 and a waste water storage tank 1.

[0053] The reactor is made of stainless steel and is divided into two parts: reaction zone (including anaerobic zone 7, anoxic zone 8 and aerobic zone 9) and clarification zone 13. Among them, the lower part of the reaction zone has an inner diameter of 100mm and a height of 1.8m; the upper part has an inner diameter of 90mm and a height of 0.6m, with a total volume of 18L; the clarification zone is a ring column with an inner diameter of 90mm and an inner diameter of the outer ring of 150mm, with a height of 0.6m and a volume of 3.5L (half one volume). The reactor is pre-corrosion-treated, and contains granular sludge, suspended sludge and biofilm for degrading pollutants in wastewater.

[0054] The waste water storage tank is used for storing sewage, and its water outlet is connected...

Embodiment 2

[0067] Take the dewatered sludge from the digestion tank of a sewage treatment plant in Taiyuan for activity recovery, mix it with a small amount of loose granular sludge (the granular sludge was originally used to treat beer wastewater, and it was submerged in water for two years without any nutrients) and inoculated into In the experimental reactor, self-prepared beer wastewater was used, and the operation was started at 35°C, and the HRT was maintained for 3.4h. The influent COD was increased from 300mg / L to 1200mg / L within a week, and the influent load was increased from 2.37kgCOD / m 3 ·d increased to 9.0kgCOD / m 3 d, Granular sludge was formed rapidly, at this time the sludge concentration reached 31.3g / L, VSS / SS reached 0.68, and the COD removal rate reached 91.7%. Then use this granular sludge to directly treat domestic sewage, while keeping the operating temperature at an ambient temperature of 11-24°C, when the influent HRT is 1.7h, and the COD concentration is 127-424m...

Embodiment 3

[0070] Take the granular sludge from the stable running coking wastewater pilot plant (COD removal rate can reach 70%-80%, ammonia nitrogen removal rate can reach 40%-50%), and inoculate it into the experimental reactor to treat coking wastewater , coking wastewater was taken from a coking plant in Taiyuan City, and the concentrations of influent COD, ammonia nitrogen, phenols, SCN and CN were 630-950mg·L -1 , 79-178mg·L -1 , 19.6-453.3mg·L -1 , 87.7-537.5mg·L -1 , 0.79-51.8mg·L -1 .

[0071] Simultaneously start the sewage backflow, sludge backflow and aeration to form an effective circulation of sewage and sludge as well as a micro-oxygen environment in an appropriate position in the reactor, and gradually form biofilm, suspended sludge and granular sludge in the reactor Coupling of aerobic zone, anoxic zone and anaerobic zone; coupling of aerobic microenvironment, anoxic microenvironment and anaerobic microenvironment. An obvious feature of this stage is: the removal of...

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Abstract

The invention discloses a granule sludge and biological film coupled integrated sewage treatment method and a treatment device suitable for the same. A reactor is internally filled with granule sludge, suspended sludge and filler, wherein a biological film is formed on the filler; the granule sludge is coupled with the suspended sludge and the biological film by utilizing the high efficiency of the granule sludge; meanwhile, a micro-aerobic aeration environment is provided at a proper position in the reactor, and an anaerobic region, an anoxic region and an aerobic region are formed in the reactor, so that an anaerobic microenvironment, an anoxic microenvironment and an aerobic microenvironment are coupled; in addition, the double circulation that part of sludge in the anaerobic region returns to the aerobic region and part of sludge in the aerobic region returns to the anaerobic region is provided, and a proper quantity of sludge in the aerobic region is discharged, so that the synchronous and efficient removal of COD, N, P and the like in sewage is finally realized.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a granular sludge biofilm coupling integrated sewage treatment method and a treatment device thereof. Background technique [0002] The traditional main process of urban sewage and industrial wastewater treatment - the aerobic process (aerobic activated sludge method or aerobic biofilm method) faces a series of problems such as large area, large amount of residual sludge, and large aeration volume. . [0003] For problems with a large footprint, integration is the direction. [0004] For the problem of large amount of residual sludge and large amount of aeration, the two must be considered together. The aerobic system is precisely because of the large amount of aeration and the rapid growth of sludge (microorganisms), which directly leads to a large amount of residual sludge. For this reason, the most fundamental way to solve the large amount of residual sludg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30
Inventor 董春娟潘青业耿炤宇汪艳霞魏玲
Owner 太原大学
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