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Process for regenerating, recovering and reutilizing low-concentration organic waste water

An organic wastewater, low-concentration technology, used in aerobic process treatment, water pollutants, sustainable biological treatment, etc. problems, to achieve the effect of easy backwashing, low operating and maintenance costs, and fast filtration

Inactive Publication Date: 2007-11-21
大连春兴科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the different types, materials, and processing techniques of ultrafiltration membranes, there are certain difficulties in selection and use.
At the same time, impurities and colloids in the sewage will be enriched on the surface of the ultrafiltration membrane, causing the membrane pores to be blocked quickly, reducing the water yield and quality of the effluent, and increasing the burden on the reverse osmosis membrane. Therefore, it should be added before the ultrafiltration membrane. A set of pretreatment device, so that the processing cost rises

Method used

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  • Process for regenerating, recovering and reutilizing low-concentration organic waste water
  • Process for regenerating, recovering and reutilizing low-concentration organic waste water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A city sewage treatment plant 600m 3 / h Secondary standard effluent is regenerated and reused in thermal power plants

[0034] Adopt the inventive method to process, and its process is as follows:

[0035] The first step, influent water quality, national standards and removal rate

[0036] The secondary standard effluent water quality requirements are COD≤100mg / L, BOD 5 ≤30mg / L, ammonia nitrogen ≤25mg / L, turbidity (no requirement) (GB 18918-2002). The technology of the present invention requires that the influent water quality is controlled within this standard. The water quality required by the user should meet the GB / T19923-2005 standard: COD≤50mg / L, BOD 5 ≤10mg / L, turbidity≤3NTU, ammonia nitrogen≤10mg / L (when the heat exchanger of the circulating cooling water system is made of copper, the ammonia nitrogen index of the circulating cooling water should be less than 1mg / L).

[0037] The second step of processing:

[0038] a) The secondary standard effluent of the...

Embodiment 2

[0044] A petrochemical plant 150m 3 / h petrochemical low-concentration wastewater regeneration and reuse treatment

[0045] The first step, influent water quality, national standards and removal rate

[0046] The effluent water quality requirements of petrochemical plant wastewater treatment workshops are COD≤100mg / L, ammonia nitrogen≤25mg / L, petroleum ≤5mg / L, and turbidity (no requirement) (GB 18918-2002). The process of the present invention requires that the influent water quality be controlled within this standard; the water quality required by the user should meet the GB / T19923-2005 standard: COD≤50mg / L, BOD 5 ≤10mg / L, turbidity≤3NTU, ammonia nitrogen≤10mg / L (when the heat exchanger of the circulating cooling water system is made of copper, the ammonia nitrogen index of the circulating cooling water should be less than 1mg / L);

[0047] The second step of the process

[0048] a) Firstly, pump the standard outlet water from the wastewater purification workshop of the pet...

Embodiment 3

[0055] A city sewage treatment plant 400m 3 / h Secondary standard effluent regenerated and reused in chemical plants

[0056] Adopt the inventive method to process, and its process is as follows:

[0057] The first step, influent water quality, national standards and removal rate

[0058] The secondary standard effluent water quality requirements are COD≤100mg / L, BOD 5 ≤30mg / L, ammonia nitrogen ≤25mg / L, turbidity (no requirement) (GB 18918-2002). The technology of the present invention requires that the influent water quality is controlled within this standard. The water quality required by the user should meet the GB / T19923-2005 standard: COD≤50mg / L, BOD 5 ≤10mg / L, turbidity≤3NTU, ammonia nitrogen≤10mg / L (when the heat exchanger of the circulating cooling water system is made of copper, the ammonia nitrogen index of the circulating cooling water should be less than 1mg / L);

[0059] The second step of the process

[0060]a) The secondary standard effluent of the urban se...

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Abstract

Process for regenerating, recovering and utilizing low-concentration organic effluent is carried out by biological oxidation treating for low-concentration organic effluent, entering it into tilted-plate settling tank, adding flocculating agent into inlet pipe of tilted-plate settling tank, depositing while separating out supernatant fluid, two-stage filtering by fibrous filter and quartz sand filter, filtering by security filter, passing into high-pressure pump, entering into reverse osmose filter and separating. It's cheap, stable and convenient, COD removing rate reaches 96%, ammonia-nitrogen removing rate reaches 99%.

Description

technical field [0001] The invention relates to a low-concentration organic wastewater regeneration and reuse process, and belongs to the technical field of advanced sewage treatment. Background technique [0002] With the rapid increase of the world's population, the rapid development of industrial and agricultural production, the acceleration of urbanization, and the increasingly serious pollution of natural water bodies such as rivers, rivers, and lakes, the amount of fresh water available is gradually decreasing, and the contradiction between supply and demand of water resources has become increasingly prominent. It is predicted that the water resource crisis in the 21st century will be at the top of all kinds of crises in the world. Therefore, people turned their attention to urban sewage and industrial wastewater. At present, this kind of sewage (waste) water is discharged into natural water bodies after being treated up to the standard, and a few are directly dischar...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F3/02C02F1/52C02F1/44C02F3/10C02F101/30
CPCY02W10/10
Inventor 张兴文童健李文霞丁会请邓文涛
Owner 大连春兴科技股份有限公司
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