담수화시스템 개발사인 Desalitech사는 염소한계값을 준수하기 위하여 2개소의 폐수처리플랜트를 개선하기 위한 프로젝트에 LA 위생국인 LACSD와 공동으로 파이럿 플랜트를 지원키로 했다.
캘리포니아 주정부는 높은 염소함유량으로 염분에 취약한 농작물에 해를 미치므로 폐수 처리수에 대한 염분농도를 낮출 것을 요구했다. Desalitech사의 Closed Circuit 방식의 담수화 공법은 RO 공정으로부터 회수율을 높이는 기술로 이러한 고회수율로 농축수 배출 및 염분수의 처리 비용을 효과적으로 절감시킬수 있다.
한편 처리장으로부터의 배출수내의 염소 함량을 줄이기 위한 데이터 수집 및 관련 기술의 검토·평가를 위한 파이럿 플랜트 운전을 실시 에너지 사용량, 생산수 수질 및 스케일 발생 등을 모니터하여 향후 full-scale 시스템에 적용할 예정이다.
[원문보기]
LACSD signs up Desalitech for chloride‑removal test
Desalination system developer Desalitech is to support a pilot project with the Los Angeles County Sanitation Districts (LACSD) to upgrade two Santa Clarita Valley wastewater treatment plants in order to meet state‑mandated chloride limits, the company announced on 2 October 2013.
The State of California has determined that high levels of chloride are harming salt‑sensitive crops downstream and has ordered the LACSD to lower chloride levels in treated wastewater.
Desalitech's Closed Circuit Desalination solution is capable of achieving high recovery with reverse-osmosis (RO) from challenging water compositions. High recovery will effectively reduce effluent discharge and brine disposal costs, which can represent over 50% of total water treatment project costs.
The pilot study will be completed at the Whittier Narrows Water Reclamation Plant (WRP) to model data for the Valencia facility 100 miles (160 km) north of Los Angeles. The Desalitech system will process 15 GPM (0.95 L/s) of municipal wastewater effluent as part of the districts' research efforts to evaluate technologies to reduce chlorides in discharges from treatment plants in the Santa Clarita Valley.
The pilot study will be conducted for 2,000 hours at 85‑93% recoveries, while monitoring average specific energy, permeate quality and scaling potential. Successful testing could lead to implementation of a full‑scale system at the Valencia WRP, which produces 22 MGD of municipal effluent.
"One of the main challenges of operating typical RO systems at the WRPs is the amount of waste they generate," said Phil Ackman, supervising engineer wastewater research for LACSD. "Disposal of this waste from inland locations can be complicated and expensive, and Desalitech's solution has the flexibility and reliability to help us meet our objectives. The potential of the Desalitech process to increase recovery and reduce waste could save the districts a tremendous amount of resources."
즐겨찾기 추가 
시작페이지로 설정
