Effects of irrigation with treated municipal wastewater on soil properties in arid and semi-arid regions

The objectives of this study were to determine the amounts of soil organic matter (SOM) stored within surface soils of high mountain forests and how the SOM amounts are affected by aridity and altitude in semi-arid regions of Central Anatolia. Various climate and altitude conditions of Central Anatolia were included in this study, and SOM amounts were found to be higher in the surface soils of northern Anatolia forests. Our results showed that altitude, climatic factors, and tree species were the most important factors affecting the amount of SOM and other soil properties. SOM, pH, bulk density and available water content differed significantly depending on the altitude and climatic factors in the study areas. As the altitude increased in semi-arid regions, the aridity decreased and the amount of SOM increased.

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Environmental Implications of Soil Properties and Essential Nutrient Interactions, Under the Effect of Treated Municipal Wastewater

Water Air & Soil Pollution ◽

10.1007/s11270-008-9809-6 ◽

2008 ◽

Vol 197 (1-4) ◽

pp. 267-276 ◽

Cited By ~ 4

Author(s):

I. K. Kalavrouziotis ◽

P. H. Koukoulakis

Keyword(s):

Soil Properties ◽

Municipal Wastewater ◽

Nutrient Interactions ◽

Environmental Implications ◽

Essential Nutrient ◽

Treated Municipal Wastewater

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Incidence of Escherichia coli in Vegetable Crops and Soil Profile Drip Irrigated with Primarily Treated Municipal Wastewater in a Semi-Arid Peri Urban Area

Agriculture ◽

10.3390/agriculture10070291 ◽

2020 ◽

Vol 10 (7) ◽

pp. 291

Author(s):

Deepak Singh ◽

Neelam Patel ◽

Agossou Gadedjisso-Tossou ◽

Sridhar Patra ◽

Nisha Singh ◽

...

Keyword(s):

Escherichia Coli ◽

Urban Area ◽

Soil Profile ◽

Municipal Wastewater ◽

Bitter Gourd ◽

Vegetable Crops ◽

E Coli ◽

Treated Municipal Wastewater ◽

Subsurface Drip ◽

Semi Arid

This study investigates the incidence of Escherichia coli in cauliflower, bitter gourd and soil profile drip-irrigated with municipal wastewater in a semi-arid peri-urban area in India. There were four treatments: drip irrigation with primarily treated municipal wastewater through inline (non-pressure compensating) surface drip (T1), inline subsurface drip (T2), bioline (pressure compensating) subsurface drip (T3) and bioline surface drip (T4). Results revealed that T1 had the highest concentration of E.coli (35 ± 2.66 and 25 ± 2.26 colony forming unit (CFU) g˗1) and T3 had the lowest concentration of E. coli (29 ± 2.29 and 18.9 ± 2.04 CFU g˗1) for cauliflower and bitter gourd, respectively. In bitter gourd top fruits (1 m above the ground level), the E. coli count was significantly lower (p < 0.05) than in the surface level fruits. There was also a considerable reduction of E. coli counts in bioline drip lateral as compared to the inline drip. A higher concentration of E. coli (470 ± 70.5 and 410 ± 36.9 CFU g˗1 soil) was also found in the top soil (0–0.15 m) in T1 treatment, while the minimum (154 ± 13.86 and 95 ± 14.25 CFU g˗1) was observed in T3. Hence, bioline drip lateral may be a better option for wastewater irrigation as compared to inline drip to reduce microbial contamination of crop and soil.

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