Journal of Environmental Biology

Regeneration and reuse of leachate  from a municipal

solid waste landfill 

 

 

Chih-Kuei Chen*, Shang-Lien Lo and Ting-Yu Chen

Graduate Institute of Environmental Engineering, National Taiwan University, 71, Chou-Shan Rd., Taipei, 106, Taiwan, R.O.C.

*Corresponding Author E-mail: cgg@ms22.hinet.net 

 

  

  Publication Data

Paper received:

05 July 2012

 

Revised received:

20 June 2013

 

Re-revised received:

28 October 2013

 

Accepted:

28 February 2014

 

Abstract

Landfill leachate is deep brown in color with extremely complex composition and difficult to treat in order to meet the effluent standards. The leachate of Keelung City Tien Wai Tien landfill has an average flow of 350 CMD. In the present study following serially connected devices: Activated sludge/contact aeration (AS/CA) combined system, reverse osmosis (RO) and an ammonia stripping tower were used to treat the leachate. After treatment, the COD (removal rate of 91%), BOD (removal rate of 83%), SS (removal rate of 86%) and NH₄⁺-N level (removal rate of 98%) significantly reduced in the leachate. The treated effluent was further recycled and used as RO back washing water and for sprinkling roads and watering plants in Keelung City. It is further required to evaluate whether the treated effluent can be reutilized for agriculture and extinguishing fire during shortage of water.

 

Key words

 

 

Landfill leachate, AS/CA, RO, Ammonia stripping tower, Reuse

 

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