www.xinhuanet.com
XINHUA online
CHINA VIEW
VIEW CHINA
 Breaking News At least 60 killed in Indonesian plane crash    15 feared dead in Mexican black powder explosion    M5.9 earthquake hits Celebes sea of Indonesia    Civilian helicopter crashes in New Orleans, no deaths    At least five shot to death by police on New Orleans bridge    Putin appoints navy commander    
Home  
China  
World  
Business  
Technology  
Opinion  
Culture/Edu  
Sports  
Entertainment  
Life/Health  
Travel  
Weather  
RSS  
  About China
  Map
  History
  Constitution
  CPC & Other Parties
  State Organs
  Local Leadership
  White Papers
  Statistics
  Major Projects
  English Websites
  BizChina
- Conferences & Exhibitions
- Investment
- Bidding
- Enterprises
- Policy update
- Technological & Economic Development Zones
Online marketplace of Manufacturers & Wholesalers
   News Photos Voice People BizChina Feature About us   
Bangladesh invents low-cost technology to treat industrial waste
www.chinaview.cn 2005-09-05 13:22:54

    DHAKA, Sept. 5 (Xinhuanet) -- The Bangladesh Environmental Management Project (BEMP) has invented a sustainable technology to treat industrial wastes discharge particularly by the textile and dyeing industries creating a great scope of preventing pollution.

    The method, operated by minimum machinery to separate dyeing sediments and liquid wastes of the fabrics-dyeing mills, is also proved to be environment-friendly apart from being a cheaper-than-hi-tech technology of waste treatment, local daily New Age reported on Monday.

    Sye M Iqbal Ali, Director of BEMP, narrated the process of developing the low-cost technology.

    The salient features of the technology are demonstration of good house keeping practices, waste minimization through reuse of dyes and chemicals, and process modification, pre-treatment of effluent and settling, treatment of pre-treated effluent through areed-bed and management of sludge in environmentally sound manner,Ali was quoted as saying by the daily.

    In this process, liquid textile waste is filtered through several layers that separate a large portion of dyeing chemicals. BEMP sources said that 75 percent of the fresh dye solution used in dyeing could be recovered for potential reuse.

    Then the flow of the wastes is pressed to enter into a reed-bed,a constructed wetland of several layers consisting of brick chips,sand, tiny stones and soil atop where selected vegetation is cultivated.

    According to the daily, the experiment found that some typical wetland vegetation in Bangladesh like nalkhagra, keya, bamboo, murta are highly suitable for absorbing the soluble contaminants from the reed-bed with at least three feet deep cluster roots.

    Later, the reed-bed drains clean water through the way oppositeto the entering side of polluted water. Beside, the sediment that was filtered first is burnt carefully to make sludge, which can beused in making bricks after mixing with mud or cement.

    Iqbal Ali said that the experimental project costs 450,000 taka(about 6,900 US dollars) only.

    Now the government plans to introduce the technology in all of the industries that produce a lot of liquid wastes.

    Environment and Forest Minister Tariqul Islam said, "This local technology is affordable by the small and medium-scale entrepreneurs. These plants are capable of serving almost all hi-tech treatment plants." Enditem

  Related Story
Copyright ©2003 Xinhua News Agency. All rights reserved.
Reproduction in whole or in part without permission is prohibited.