High-ammonia nitrogen low C/N ratio waste water treatment process and use thereof

A wastewater treatment, high ammonia nitrogen technology, applied in biological water/sewage treatment, flotation water/sewage treatment, water/sludge/sewage treatment, etc. Clear, difficult to maintain biological concentration, slow proliferation of nitrifying bacteria, etc., to achieve the effect of less sludge output, small footprint, and low operating costs

Inactive Publication Date: 2008-03-12
北京盖雅技术中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the traditional nitrification and denitrification process has played a certain role in the denitrification of wastewater, there are still the following problems: ①The proliferation of nitrifying bacteria is slow and it is difficult to maintain a

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  • High-ammonia nitrogen low C/N ratio waste water treatment process and use thereof

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0031] Example 1

[0032] A starch factory uses corn as raw material to produce high-quality starch, with a daily sewage discharge of 1300m 3 / d, the existing sewage treatment process is "UASB (anaerobic) + SBR (aerobic) + biological contact oxidation". The UASB process runs stably and the treatment effect is better. When the influent COD is 8000-12000mg / L, the effluent COD is generally about 800mg / L, the effluent COD of SBR is 300-400mg / L, but the operation effect of the contact oxidation process is poor, the effluent COD≥180mg / L, NH 3 -N is too severe to meet the relevant effluent discharge standards. S-IBAF is used as the main process to carry out small-scale experiments on site. The influent flow of the experiment is 4L / h, the effective volume of the IBAF reaction tank is 80L, the hydraulic retention time is 20h, and the carrier loading volume is 60% (high efficiency carrier accumulation volume 48L), the inoculated microorganisms are engineered bacteria. The experimental influ...

Example Embodiment

[0033] Example 2

[0034] A monosodium glutamate factory uses corn starch as raw material to produce monosodium glutamate, with a daily sewage discharge of 8000m 3 / d, the existing sewage treatment process is "UASB (anaerobic) + SBR (aerobic)". The effluent COD of SBR is 100-200mg / L, NH 3 -N is too severe to meet the relevant effluent discharge standards. S-IBAF is used as the main process to carry out small-scale experiments on site. The experimental water flow rate is 4L / h, the effective volume of the IBAF reaction tank is 60L, the hydraulic retention time is 15h, and the carrier loading volume is 60% (high-efficiency carrier accumulation volume 36L), the inoculated microorganisms are engineered bacteria, the experimental influent is sewage treatment plant effluent, the influent COD concentration is between 104.0mg / L and 164.0mg / L, and the effluent COD concentration is between 13.71mg / L and 35.78mg / L; Water NH 3 -N concentration is 154.3mg / L to 361.6mg / L, effluent NH 3 -N concen...

Example Embodiment

[0035] Example 3

[0036] A chemical company is the largest small nitrogen fertilizer enterprise in Hebei Province. Its main product production capacity is 135,000 tons of synthetic ammonia, 200,000 tons of urea, and 30,000 tons of methanol. During the production process, the company discharges about 2000m of high ammonia nitrogen terminal wastewater every day 3 . S-IBAF combined process is used for terminal wastewater treatment. The pretreatment process is a radial flow sedimentation tank. The effective volume of IBAF is 2250m 3 , Hydraulic retention time is 27h, carrier loading is 53% (the high-efficiency carrier bulk volume is 1200m 3 ), the inoculated microorganisms are engineered bacteria. As of the beginning of August 2007, it has been running stably for 3 months. The influent CODcr is 500-800mg / L, BOD 5 300-500mg / L, SS 300-1000mg / L, NH 3 -When N is 500-700mg / L, CODcr in effluent quality is 81-108mg / L, BOD 5 8-15mg / L, SS 40-70mg / L, NH 3 -N is 4.8-12mg / L, which can continuous...

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Abstract

The present invention provides a treatment technics and application to wastewater with high ammonian and low C/N ratio. The technics adopts a compound technics of ''pretreatment plus immobilized microorganism-biological aerated filter''. Firstly, the wastewater enters the S section of the compound technics and most of the suspended substances and part of the COD are removed to prevent the suspended substances in the wastewater from plugging the filter materials in IBAF and guarantee the stable operation of the subsequent IBAF technics. The yielding water of the S section enters the IBAF biological treatment technics to remove most ammonian and COD in the wastewater and the yielding water can be discharged out directly or recycled after a proper depth treatment. Compared with the prior art, the present invention has the advantages of simple S-IBAF technics, good denitriding effect, small area occupancy, low operation cost, low mud output and convenient operation and management. The present invention has the applications that the present invention not only has specific effects on compounding the industrial wastewater of ammonia and nitrogenous fertilizer, the industrial wastewater of the coal combined methanol, the wastewater of leather, the corn deep processing of the food industry, the wastewater treatment and alteration in the monosodium glutamate industry, but is also suitable for other treatment technics and application to wastewater with high ammonian and low C/N ratio.

Description

technical field [0001] The present invention relates to the field of wastewater treatment, more specifically, relates to a method and application for treating wastewater with high ammonia nitrogen and low C / N ratio, and the specific industries include synthetic ammonia and nitrogen fertilizer industrial wastewater, coal methanol industrial wastewater, leather Wastewater, food industry (such as corn deep processing, monosodium glutamate industry, etc.) wastewater treatment and transformation, etc. Background technique [0002] At present, the treatment methods of ammonia nitrogen wastewater include physical, chemical and biological methods. Physical methods include reverse osmosis, distillation, and soil irrigation; chemical methods include ion exchange, air stripping, chemical precipitation, breakpoint chlorination, electrodialysis, electrochemical treatment, and catalytic cracking. Due to the characteristics of high operating costs of physical and chemical methods, their a...

Claims

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Application Information

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IPC IPC(8): C02F3/12C02F1/52C02F1/24
CPCY02E50/30Y02W10/10
Inventor 曾明倪晋仁叶正芳
Owner 北京盖雅技术中心有限公司
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