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Title: Membrane bioreactor technology: A novel approach to the treatment of compost leachate

Highlights: • First membrane bioreactor treatment method for compost leachate. • No chemical additive or UV radiation source in this new biological method. • Removal rates of more than 99% for organics and ammonium were achieved. • Heavy metals were reduced by at least 82.7% except copper. - Abstract: Compost leachate forms during the composting process of organic material. It is rich in oxidizable organics, ammonia and metals, which pose a risk to the environment if released without proper treatment. An innovative method based on the membrane bioreactor (MBR) technology was developed to treat compost leachate over 39 days. Water quality parameters, such as pH, dissolved oxygen, ammonia, nitrate, nitrite and chemical oxygen demand (COD) were measured daily. Concentrations of caffeine and metals were measured over the course of the experiment using gas chromatography – mass spectrometry (GC/MS) and inductively coupled plasma – mass spectrometry (ICP–MS) respectively. A decrease of more than 99% was achieved for a COD of 116 g/L in the initial leachate. Ammonia was decreased from 2720 mg/L to 0.046 mg/L, while the nitrate concentration in the effluent rose to 710 mg/L. The bacteria in the MBR system adjusted to the presence of the leachate, and increasedmore » 4 orders of magnitude. Heavy metals were removed by at least 82.7% except copper. These successful results demonstrated the membrane bioreactor technology is feasible, efficient method for the treatment of compost leachate.« less
Authors:
; ;  [1] ;  [2] ;  [1]
  1. Department of Chemistry, Acadia University, Wolfville, NS, Canada B4P 2R6 (Canada)
  2. E and Q Consulting and Associates Limited, Wolfville, NS, Canada B4P 2R1 (Canada)
Publication Date:
OSTI Identifier:
22300313
Resource Type:
Journal Article
Resource Relation:
Journal Name: Waste Management; Journal Volume: 33; Journal Issue: 11; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ADDITIVES; AMMONIA; BACTERIA; BIODEGRADATION; BIOFUELS; BIOREACTORS; CAFFEINE; CHEMICAL OXYGEN DEMAND; COPPER; DISSOLVED GASES; GAS CHROMATOGRAPHY; HEAVY METALS; ICP MASS SPECTROSCOPY; MEMBRANES; NITRATES; NITRITES; OXYGEN; PH VALUE; ULTRAVIOLET RADIATION; WATER QUALITY