Document Detail

Composting of tannery effluent with cow manure and wheat straw.
MedLine Citation:
PMID:  15158518     Owner:  NLM     Status:  MEDLINE    
Wastewater from the leather industry in León (Guanajuato, México) is discharged into the Turbio river without treatment. Tannery wastewater contains utilizable nutrients, but also toxic organic compounds which might affect soil processes and plant growth, and pathogens, which might pose a threat to the local farming community. Tannery effluent was composted with cow manure and wheat straw for 90 days to reduce pathogens and toxic organic compounds and monitored. The compost was characterized by an electrolytic conductivity (EC) of 28.1 ms cm(-1), cation exchange capacity of 17.7 meq 100 g(-1), an absorbance at 645 nm of 0.0175, a respiration rate of 0.062 mg CO2-C kg(-1) compost-C day(-1), pH 8.5 and C:N ratio 7:1 with a germination index for cress (Lepidium sativum) of 48% after 90 days. Less than 10 faecal coliforms and no Salmonella sp., Shigella sp. or eggs of helminthes were detected in the compost while total coliforms decreased by log10 of 2. Total concentrations of lead (Pb) were 8.9 mgkg(-1) dry compost, chromium (Cr) 77 mg kg(-1) dry compost, cadmium (Cd) 0.4 mg kg(-1) dry compost, copper (Cu) 10.3 mg kg(-1) dry compost and sodium (Na) 14,377 mg kg(-1) dry compost. The compost characteristics indicated that it was mature, but the germination index for cress of less than 50% suggested possible remaining phytotoxic compounds. However, the large salt concentrations (especially Na), might have inhibited cress development and thus reduced the germination index. The large salt concentration might thus limit the use of this kind of compost.
S M Contreras-Ramos; D Alvarez-Bernal; N Trujillo-Tapia; L Dendooven
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Bioresource technology     Volume:  94     ISSN:  0960-8524     ISO Abbreviation:  Bioresour. Technol.     Publication Date:  2004 Sep 
Date Detail:
Created Date:  2004-05-25     Completed Date:  2004-08-25     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9889523     Medline TA:  Bioresour Technol     Country:  England    
Other Details:
Languages:  eng     Pagination:  223-8     Citation Subset:  IM    
Copyright Information:
Copyright 2003 Elsevier Ltd.
Laboratory of Soil Ecology, Department of Biotechnology and Bioengineering, CINVESTAV-IPN, Avenida Instituto Politécnico Nacional 2508, C.P. 07000 México D.F., Mexico.
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MeSH Terms
Bacteria / metabolism*
Biodegradation, Environmental
Brassicaceae / growth & development
Electric Conductivity
Manure / microbiology*
Metals, Heavy / analysis
Sodium Chloride / analysis
Soil / analysis*
Time Factors
Triticum / metabolism
Waste Disposal, Fluid / methods*
Water Pollutants, Chemical / analysis*
Reg. No./Substance:
0/Manure; 0/Metals, Heavy; 0/Soil; 0/Water Pollutants, Chemical; 7647-14-5/Sodium Chloride

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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