폐수처리 솔루션 설계 및 제조업체인 World Water Works가 자사의 DEMON® 처리시스템 실행의 한 부분으로 Landia의 수중 믹서를 사용했다고 최근 발표했다. Landia는 덴마크 기반의 펌프 및 믹서 제조업체로, 이번에 적용된 시스템은 버지니아주 Seaford 지역에 위치한 York강 처리 플랜트에 설치된다.
DEMON 기술은 북미에서 York강 시설에 처음으로 운영 실행된다.

 

 

 

World Water Works, Inc., a designer and manufacturer of wastewater treatment solutions, recently announced that it has used a submersible mixer from Landia, a Danish-based pump and mixer manufacturer, as part of the implementation of its DEMON® treatment system at the York River Treatment Plant in the community of Seaford, Va.

 

The York River facility, part of the Hampton Roads Sanitation District (HRSD) regional wastewater treatment utility, served as the first operating implementation site of DEMON technology in North America.

 

The DEMON system, a deammonification process, is an innovative approach to nitrogen removal that is efficient, reliable and cost-effective. It offers numerous benefits over traditional nitrification/denitrification systems, including a 90-percent reduction in sludge-handling volume, 100-percent reduction in chemical demand and 60-percent lower energy requirement.
 
The technology runs a two-step/single-stage process that leverages two kinds of bacteria -- ammonia oxidizing bacteria and anaerobic ammonium oxidizing bacteria (anammox) -- in order to first oxidize the ammonia in wastewater to nitrite and then convert a combination of this nitrite and remaining ammonia into harmless nitrogen gas.

 

Designed to agitate, homogenize and suspend solids in demanding conditions, Landia's submersible mixer model POP-I is utilized to mix granulated sludge for the HRSD implementation of the DEMON process. Featuring a propeller shaped for optimum flow/homogenization, the POP-I mixes the DEMON process' anammox biomass in a versatile on/off operation, kicking in automatically for the non-aeration cycle.

 

[출처 = Water World / 2015년 2월 17일]