Process comprising anammox bacteria on biofilm carriers for removing ammonium from a wastewater stream

一种去除氨、生物膜反应器的技术，应用在反氨化领域

Active Publication Date: 2015-02-04
VEOLIA WATER SOLUTIONS & TECH SUPPORT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, conventional nitrification and denitrification also require a large supply of additional carbon sources

Method used

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  • Process comprising anammox bacteria on biofilm carriers for removing ammonium from a wastewater stream
  • Process comprising anammox bacteria on biofilm carriers for removing ammonium from a wastewater stream
  • Process comprising anammox bacteria on biofilm carriers for removing ammonium from a wastewater stream

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Embodiment Construction

[0023] The invention relates to a method for removing ammonia nitrogen, NH 4 -N method, in which ammonia-nitrogen is oxidized to nitrite-nitrogen without producing large amounts of nitrate-nitrogen, and the nitrite-nitrogen is then denitrified to produce elemental nitrogen. The basic process is carried out in the side stream and main stream of wastewater treatment systems and methods. As described below, certain bacteria capable of this form of ammonia removal are grown in the side stream and used to remove ammonia from the side stream. Conditions in the side stream are favorable for the growth of bacteria capable of carrying out the method and need to be maintained in the side stream. From time to time the bacteria are brought into contact with the wastewater in the main flow, and according to the method, the bacteria function to remove ammonia nitrogen from the wastewater in the main flow. However, the conditions in the mainstream are not suitable for the growth of bacteri...

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Abstract

A process that utilizes ammonium oxidizing bacteria (AOB) and anaerobic ammonium oxidizing (ANAMMOX) bacteria to remove ammonium from a wastewater stream. Sludge separated from the wastewater in a mainstream is processed in a sidestream that includes an anaerobic digester, a dewatering system, and a biofilm reactor. The anaerobic digester produces digested sludge that is dewatered, producing reject water that includes a relatively high ammonium concentration and a relatively low organic carbon concentration and a relatively high temperature. The reject water is treated in a sidestream deammonification biofilm reactor that includes biofilm carriers seeded with AOB and ANAMMOX bacteria that are effective to remove ammonium from the reject water. AOB and ANAMMOX bacteria on the media carriers is utilized to contact the wastewater in the mainstream and to remove ammonium therefrom.

Description

[0001] Cross References to Related Applications [0002] This application is based on 35 U.S.C. §119(e) claiming priority to the following US formal application filed April 4, 2012: Application Serial No. 13 / 439,153. The entire content of this application is incorporated herein by reference. technical field [0003] The present invention relates to systems and methods for removing ammonia from wastewater streams, and more particularly to deammonification (deammonification, deammonfication) processes, which require the use of aerobic ammonium oxidation (AOB) bacteria and anaerobic ammonium oxidation (ANAMMOX )bacteria. Background technique [0004] Typically, wastewater fluids contain ammonia nitrogen (ammonium nitrogen), NH 4 -N. Usually, in order to remove ammonia nitrogen, nitrification and denitrification are called two-step process. In this conventional method of removing ammonia nitrogen, the method requires a first step, which is called the nitrification step and e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F3/30C02F3/10
CPCC02F3/348C02F3/341C02F3/10C02F3/307C02F2101/16Y02E50/30Y02W10/10
Inventor 赵洪托马斯·韦兰德芒努斯·克里斯滕松罗曼·勒迈尔
Owner VEOLIA WATER SOLUTIONS & TECH SUPPORT
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