Biochemical degradation system coupling hydrolytic acidification-anaerobic and aerobic
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A hydrolysis acidification, anaerobic and aerobic technology, applied in the field of environmental engineering and industrial wastewater treatment, can solve the problems of high energy consumption, poor impact resistance, long residence time, etc. The effect of improved processing efficiency
Active Publication Date: 2009-03-11
TSINGHUA UNIV
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[0008] The purpose of the present invention is to overcome the shortcomings of the existing refractory organic wastewater treatment process, such as high energy consumption, low treatment efficiency, poor impact resistance, long residence time, etc., and propose a more advanced method for refractory organic wastewater requiring anaerobic degradation. Effective Biodegradation System
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Embodiment 1
[0032] Example 1: Oxidation-reduction potential of hydrolyzed acidified biological fluidized bed
[0033] Hydrolysis and acidification fluidized bed type: air-lift internal circulation biological fluidized bed; effective volume: 67L;
[0035] Superficial gas velocity: 0.01~0.03mm / s; redox potential: -100~0mv.
[0036] It can effectively treat phenolic wastewater.
Embodiment 2
[0037] Example 2: Microbial phase within a macroporous carrier
[0038] Anaerobic and aerobic coupled fluidized bed type: air-lift internal circulation biological fluidized bed; effective volume: 35L;
[0039] Carrier size: 15mm×15mm×15mm; Carrier pore diameter: 1.25mm; Porosity: 90%; The volume ratio of the carrier dosage to the effective volume of the reactor: 10%; The carrier material is polyurethane.
[0041] After the sludge is domesticated, a single carrier is taken out to make slices and observed under a scanning electron microscope. It can be found that there is a significant difference between the inner core of the carrier and the external microbial phase. hypoxic area.
Embodiment 3
[0042] Example 3 Treatment effect of hydrolytic acidification biological fluidized bed
[0045] Superficial gas velocity: 0.2mm / s; redox potential: 50mv;
[0046] The present embodiment influent CODcr is 4900mg / L, BOD 5 1008mg / L, BOD 5 / CODcr is 0.21, after 30 hours of hydraulic retention time, the effluent CODcr is 4355mg / L, BOD 5 2505mg / L, BOD 5 / CODcr is 0.58, and the biodegradability of wastewater is significantly improved after hydrolysis and acidification treatment.
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Abstract
The present invention discloses a hydrolization and acidification - anaerobism and aerobism coupling biochemical degradation system, which belongs to the technical field of environment engineering and industrial waste water disposal. The system is used for disposing organic waste that is difficult to be degraded. The biochemical degradation system consists of two serially connected airlift internally circulating biological fluidized beds. The front airlift internally circulating biological fluidized bed is an anaerobe fluid bed which adopts micro-aeration operation and carries out hydrolization and acidification processing; and the rear airlft internally circulating biological fluidized bed is an anaerobism and aerobism coupling biological fluid bed which is constructed by filling macropore carriers and carries out the complete degradation of organisms. The organic waste water which is difficult to be degraded enters the anaerobic fluid bed first, and enters the anaerobism-aerobism coupled biological fluid bed after the hydrolization and acidification processing so as to be completely degraded. The system achieves high efficiency and quick coupling of the anaerobe degradation and the aerobe, and has the characteristics of high disposing efficiency, short residence time, small floor space, low investment, low running cost and so on. The method can be applied to the sequencing batch type disposal process, and can be applied to the continuous flow type disposal process as well.
Description
technical field [0001] The invention relates to a hydrolytic acidification-anaerobic aerobic coupled biochemical degradation system, which is used for treating refractory organic wastewater, and belongs to the technical field of environmental engineering and industrial wastewater treatment. Background technique [0002] Refractory organic wastewater comes from a wide range of sources, involving refractory organics, printing and dyeing, and pharmaceuticals. It has the characteristics of high concentration of organic pollutants, large output, complex components, and difficult to degrade. Compounds and toxic substances such as benzene and metal salts. In recent years, with the rapid development of the national economy, the discharge of refractory organic wastewater has increased year by year, and has become an important source of environmental pollution. Therefore, the treatment of such wastewater has received increasing attention. [0003] At present, the treatment methods of...
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