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Sulphur cycle-associated denitrifying enhanced biological phosphorus removal (SD-EBPR) utilizing sulphur compounds as electron carriers for biological nutrient removal of wastewater treatment

A technology of electronic carrier and sewage treatment method, applied in biological water/sewage treatment, water/sludge/sewage treatment, seawater treatment, etc.

Active Publication Date: 2017-05-10
THE HONG KONG UNIV OF SCI & TECH
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Problems solved by technology

Although the phenomenon of phosphorus uptake and release under the action of oxygen and nitric acid is well studied and understood, the putative phenomenon of phosphorus uptake and release involving the sulfur cycle has not been extensively studied and tested

Method used

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  • Sulphur cycle-associated denitrifying enhanced biological phosphorus removal (SD-EBPR) utilizing sulphur compounds as electron carriers for biological nutrient removal of wastewater treatment
  • Sulphur cycle-associated denitrifying enhanced biological phosphorus removal (SD-EBPR) utilizing sulphur compounds as electron carriers for biological nutrient removal of wastewater treatment
  • Sulphur cycle-associated denitrifying enhanced biological phosphorus removal (SD-EBPR) utilizing sulphur compounds as electron carriers for biological nutrient removal of wastewater treatment

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Embodiment Construction

[0034] overview

[0035] By introducing the sulfur cycle to the carbon oxidation cycle, develop a sulfur cycle-based denitrification-enhanced biological phosphorus removal (SD EBPR) process that can achieve biological nitrogen and phosphorus removal (BNR) while minimizing sludge generation . Figure 4 is an example of SD-EBPR technique for removing C, N and P. Various forms of elemental sulfur compounds, including sulfate (SO 4 2- ), sulfite (SO 3 2- ), Thiosulfate (S 2 o 3 2- ), sulfide (S 2- ) and elemental sulfur (S 0 ) (the above description is the main form of sulfur in water), can play the role of electron carriers, transfer electrons from organic carbon to oxygen, and its main biological processes include: phosphorus release and absorption, anaerobic Carbon uptake (storage of PHAs), heterotrophic sulfur reduction (storage of polymeric sulfide / sulfur element), heterotrophic / autotrophic denitrification, autotrophic nitrification; the above described process is...

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Abstract

Sewage treatment is performed by using sulphur to facilitate electron flow. A first cycle uses a sulphur composition having sulphur and / or sulphur compounds to transfer electrons from organic carbon to oxygen, nitrate and nitrite, and to convert phosphorus-containing compounds to solid material, which is retained in sewage sludge. The sulphur is further used to perform denitrification of nitrogen compounds. A further cycle uses oxygen to oxidize any ammonia present to nitrate and / or nitrite.

Description

technical field [0001] The present invention relates to the treatment of sewage containing organic matter, phosphorus and nitrogen. In particular, the present invention relates to wastewater treatment for biological denitrification and phosphorus removal using sulfur compounds as electron carriers. Background technique [0002] The process of biological removal of phosphorus (P), nitrogen (N) and carbon (C) has remained unchanged since the invention of the activated sludge process and the introduction of nutrient removal by biological methods, i.e., based on The principle of electron flow from carbon to oxygen through heterooxidative metabolism (as shown in Figure 1). [0003] The specific process of biological removal of P, N and C is: [0004] Reactor 1: In the absence of oxygen or nitrate, phosphorus accumulating bacteria (PAOs) release P, absorb organic carbon and store it as polyhydroxyalkanoates (PHAs). [0005] Reactor 2: Oxidation of stored organic carbon to CO th...

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Application Information

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IPC IPC(8): C02F3/30C02F3/28C02F3/12
CPCC02F3/308C02F3/345C02F2103/08
Inventor 陈光浩吴镝徐浩光
Owner THE HONG KONG UNIV OF SCI & TECH
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