Advanced Search
Syntax
Search...
Volcani treasures
About
Terms of use
Manage
Community:
אסיף מאגר המחקר החקלאי
Powered by ClearMash Solutions Ltd -
Role of organic matter in microbial transport during irrigation with sewage effluent
Year:
2007
Source of publication :
Journal of Environmental Quality
Authors :
Fine, Pinchas
;
.
Volume :
36
Co-Authors:
Fine, P., Inst. of Soil, Water and Environmental Sciences, Volcani Center, ARO, Bet Dagan 50250, Israel
Hass, A., Inst. of Soil, Water and Environmental Sciences, Volcani Center, ARO, Bet Dagan 50250, Israel, USDA-ARS, Beaver, WV 25813, United States
Facilitators :
From page:
1050
To page:
1060
(
Total pages:
11
)
Abstract:
Reduction of migration of fecal coliforms (FC) and streptococci (FS) by limiting the leaching in effluent-irrigated soil was tested in lysimeters packed with quartz sand without or with added biosolids compost or with one of two clayey soils. The 200-L, 70-cm-deep lysimeters were either planted with a Eucalyptus camaldulensis or an Oroblanco citrus tree (in the sand only), or not planted. The Euca lyptus was irrigated with oxidation pond effluent (OPE) and the Oroblanco with mechanical-biological treatment plant effluent (MBTPE). The leaching fraction (LF) ranged from 0.2 to about 1.0, and the residence time (RT) from under 1 to 40 d. The Eucalyptus was also tested under intermittent leaching (RT 11-20 d) and deficit irrigation (without leaching for about 6 mo) regimes. Under MBTPE irrigation there was little or no leaching of FC and FS. Under OPE irrigation at LF 1 without a Eucalyptus there was little or no bacterial leaching at irrigation rates below 40 L d-1 per lysimeter (RT ≥ 0.8 d). Bacterial counts in the leachate were substantial in the presence of a Eucalyptus tree under LF 0.2 and intermittent leaching regimes, and when sand-packed implanted lysimeters received OPE effluent at >45 L d-1. Bacterial recovery peaked at LF 0.2, at up to 45% of the input level. At LF 1 (RT 0.6-2.8 d) and with intermittent leaching the recoveries were minute. Bacterial counts in the washout from the deficit-irrigated lysimeters were typical of nonpolluted soils. The bacterial concentration and recovery patterns in the leachate mostly matched the organic carbon (OC) load in the irrigation water, and its concentration and bioavailablity in the leachate. We related the leaching patterns of the fecal bacteria to their relative reproduction and die-off rates, and to the dependence of their regrowth on available carbon sources. © ASA, CSSA, SSSA.
Note:
Related Files :
bioavailability
Biological materials
clayey soils
coliform bacterium
Eucalyptus
irrigation
sewage
Show More
Related Content
More details
DOI :
10.2134/jeq2006.0265
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
31290
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 01:01
You may also be interested in
Scientific Publication
Role of organic matter in microbial transport during irrigation with sewage effluent
36
Fine, P., Inst. of Soil, Water and Environmental Sciences, Volcani Center, ARO, Bet Dagan 50250, Israel
Hass, A., Inst. of Soil, Water and Environmental Sciences, Volcani Center, ARO, Bet Dagan 50250, Israel, USDA-ARS, Beaver, WV 25813, United States
Role of organic matter in microbial transport during irrigation with sewage effluent
Reduction of migration of fecal coliforms (FC) and streptococci (FS) by limiting the leaching in effluent-irrigated soil was tested in lysimeters packed with quartz sand without or with added biosolids compost or with one of two clayey soils. The 200-L, 70-cm-deep lysimeters were either planted with a Eucalyptus camaldulensis or an Oroblanco citrus tree (in the sand only), or not planted. The Euca lyptus was irrigated with oxidation pond effluent (OPE) and the Oroblanco with mechanical-biological treatment plant effluent (MBTPE). The leaching fraction (LF) ranged from 0.2 to about 1.0, and the residence time (RT) from under 1 to 40 d. The Eucalyptus was also tested under intermittent leaching (RT 11-20 d) and deficit irrigation (without leaching for about 6 mo) regimes. Under MBTPE irrigation there was little or no leaching of FC and FS. Under OPE irrigation at LF 1 without a Eucalyptus there was little or no bacterial leaching at irrigation rates below 40 L d-1 per lysimeter (RT ≥ 0.8 d). Bacterial counts in the leachate were substantial in the presence of a Eucalyptus tree under LF 0.2 and intermittent leaching regimes, and when sand-packed implanted lysimeters received OPE effluent at >45 L d-1. Bacterial recovery peaked at LF 0.2, at up to 45% of the input level. At LF 1 (RT 0.6-2.8 d) and with intermittent leaching the recoveries were minute. Bacterial counts in the washout from the deficit-irrigated lysimeters were typical of nonpolluted soils. The bacterial concentration and recovery patterns in the leachate mostly matched the organic carbon (OC) load in the irrigation water, and its concentration and bioavailablity in the leachate. We related the leaching patterns of the fecal bacteria to their relative reproduction and die-off rates, and to the dependence of their regrowth on available carbon sources. © ASA, CSSA, SSSA.
Scientific Publication
נגישות
menu      
You may also be interested in