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Ecological carbon fiber sbbr and constructed wetland combined treatment system and treatment method for reclaimed water

A technology of constructed wetlands and treatment systems, applied in sustainable biological treatment, water/sewage multi-stage treatment, biological water/sewage treatment, etc., can solve the problem of simultaneous denitrification and phosphorus removal that is difficult to achieve effectively and hinders the stable reuse of reclaimed water, etc. problems, achieve good ecological effects, low comprehensive operating costs, and reduce energy consumption

Active Publication Date: 2019-03-29
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, there are various contradictions in the current process of denitrification and phosphorus removal of domestic sewage, such as: the competition between nitrifying bacteria and phosphorus accumulating bacteria for dissolved oxygen in the system, and the competition between denitrifying bacteria and phosphorus accumulating bacteria for carbon sources, etc., which makes the sewage Simultaneous nitrogen and phosphorus removal is difficult to achieve effectively, thus hindering the stable reuse of reclaimed water

Method used

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  • Ecological carbon fiber sbbr and constructed wetland combined treatment system and treatment method for reclaimed water
  • Ecological carbon fiber sbbr and constructed wetland combined treatment system and treatment method for reclaimed water
  • Ecological carbon fiber sbbr and constructed wetland combined treatment system and treatment method for reclaimed water

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Embodiment 1

[0047] Use synthetic sewage as raw water, raw water quality: COD: 400~500mg / L, ammonia nitrogen: 20~25mg / L, TN: 30~35mg / L, TP: 4.0~5.0mg / L, PH: 7~8. The optimal working conditions and the optimal economical operating parameters of the domestic sewage in the combined process are obtained. Between 3.07 and 4.09 mg / L, the combined process can achieve the standard effluent with the lowest energy consumption. Under this mode, the removal rates of COD, ammonia nitrogen, TN and TP reached 94.6%, 94.8%, 85.4% and 61.1% respectively. The constructed wetland adopts an intermittent operation mode to further remove nitrogen and phosphorus, in which the water is fed for 12 hours, and the air is re-oxygenated for 12 hours. After stabilization, the removal rates of COD, ammonia nitrogen, TN, and TP in the wetland reach 39.3%, 47.3%, 61.5%, and 70.7%, respectively. . Under this mode, the overall combination process shows good nitrogen and phosphorus removal performance. The average concentr...

Embodiment 2

[0049] Domestic sewage from Building 6 of Beijing University of Chemical Technology is used as raw water. The specific water quality is as follows: COD: 278-398mg / L, ammonia nitrogen: 45-67mg / L, TN: 60-85mg / L, TP: 4.3-7.6mg / L, pH The value is 7.3 to 7.6. At room temperature, when the SBBR system is influent with water for 10 minutes, anaerobic for 75 minutes, aerated for 240 minutes, sedimented for 60 minutes, water discharged and left idle for 95 minutes, and dissolved oxygen is between 3.07 and 4.09 mg / L, the SBBR system’s COD, ammonia nitrogen, TN, TP The removal rates reached 90.70%, 87.46%, 67.30%, and 62.86%, respectively. The constructed wetland adopts an intermittent operation mode to further remove nitrogen and phosphorus, in which the water is fed for 12 hours, and the air is re-oxygenated for 12 hours. After stabilization, the removal rates of COD, ammonia nitrogen, TN, and TP in the wetland reach 58.34%, 40.78%, 49.33%, and 82.82%, respectively. . Under this mode...

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Abstract

The invention provides an ecological carbon fiber SBBR and constructed wetland combined processing system and a processing method aiming at reusing of recycled water, belonging to the technical field of wastewater biological treatment. The ecological carbon fiber SBBR and constructed wetland combined processing system is composed of an ecological carbon fiber SBBR device and an constructed wetland treatment device in series, wherein ecological carbon fiber is PAN-ACF modified by acetone; the SBBR device adopts a sequential batch type sewage treatment mode with the bottom part intaking water and the upper end decanting water; and the constructed wetland adopts a vertical undercurrent type and comprises a complete water-distribution and water-collection system. According to the invention, domestic wastewater is treated through the SBBR device and enters the constructed wetland, so the blockage of the constructed wetland can be effectively prevented, and the land occupation area of the constructed wetland is greatly reduced; meanwhile, the post-positioned constructed wetland can further remove nitrogen and phosphorus in effluent of the SBBR system, so highly-efficient removal of nitrogen and phosphorus through the combined treatment system is realized; and the whole combined system has the advantages of strong resistance to impact load, simple maintenance, stable effluent and good ecological effect, and complements with greening of residential areas and landscaping of a river and riverside.

Description

technical field [0001] The ecological carbon fiber SBBR and constructed wetland combined sewage treatment system related to the present invention belongs to the technical field of sewage biological treatment, and is a test device and method that can be used for domestic sewage treatment in residential quarters and sewage interception and purification of large and medium-sized river channel sewage outlets. The water quality after treatment It is required to meet the "Water Quality of Urban Sewage Recycling Landscape Environment" (GB / T18921-2002) standard at room temperature. Background technique [0002] Reclaimed water, also known as reclaimed water and reused water, is an internationally recognized second water source for cities. my country's "Thirteenth Five-Year Plan" points out that it is necessary to comprehensively save and efficiently use resources, implement the most stringent water resource management system, implement recycled water utilization projects, use water ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F3/28C02F3/30C02F3/32
CPCC02F3/2806C02F3/2813C02F3/282C02F3/2873C02F3/301C02F3/302C02F3/32C02F9/00Y02W10/10
Inventor 海热提·吐尔逊刘舒巍王晓慧张从轩
Owner BEIJING UNIV OF CHEM TECH
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