Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 402444
Title Characterization and anaerobic biodegradability of grey water
Author(s) Hernandez Leal, L.; Temmink, B.G.; Zeeman, G.; Buisman, C.J.N.
Source Desalination 270 (2011)1-3. - ISSN 0011-9164 - p. 111 - 115.
DOI http://dx.doi.org/10.1016/j.desal.2010.11.029
Department(s) Sub-department of Environmental Technology
WIMEK
Publication type Refereed Article in a scientific journal
Publication year 2011
Keyword(s) greywater treatment - treatment systems - surfactants - toxicity - boron - experiences - irrigation - quality - reactor - sludge
Abstract Grey water consists of the discharges from kitchen sinks, showers, baths, washing machines and hand basins. Thorough characterization of 192 time proportional samples of grey water from 32 houses was conducted over a period of 14 months. COD concentrations were 724 ± 150 mg L- 1, of which 34% was present as suspended COD, 25% as colloidal COD and 38% as soluble COD. The maximum anaerobic biodegradability of grey water of 70 ± 5% indicates the possibility of recovering the COD as methane. However, the low hydrolysis constant makes the application of anaerobic treatment unsuitable. Surfactants accounted for 15% of the total COD. The concentrations of anionic, cationic and noninonic surfactants were 41.1 ± 12.1 mg L- 1, 1.7 ± 0.8 mg L- 1 and 11.3 ± 3.9 mg L- 1, respectively. Of the trace elements which were measured were present below limits suggested for irrigation. Only boron (0.53 ± 0.19 mg L- 1) in a few measurements exceeded the 0.75 mg L- 1 limit established for long term irrigation.
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