Potential evapotranspiration and Emberger´s pluviothermic coefficient

Boudouresque, Eric

doi:10.3112/erdkunde.1982.01.07

Cited by 1 publication

(2 citation statements)

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“…On the other hand, summer is the driest season, with rare rain showers generating on average only 6% of annual rainfall. The potential evapotranspiration at the site is estimated to be about 900-1300 mm/year based on calculations and measurements conducted for Gabes by Boudouresque (1982).…”

Section: Climatic Conditions At the Landfill Sitementioning

confidence: 99%

“…As part of the leachate is evaporated from the basin, the "real" quantity generated is higher than the amount recirculated. Based on the potential evaporation at the site, which is estimated to be 900-1300 mm/ year (according to Boudouresque, 1982), the annual evaporation of leachate from the basin amounts to about 1400-2100 m 3 /year (3.6-5.7 m 3 /day). Considering the quantity of leachate evaporated and Figure 1.…”

Section: Leachate Data Of the Landfillmentioning

confidence: 99%

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Ammonia inhibition of waste degradation in landfills – A possible consequence of leachate recirculation in arid climates

2020

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Ammonia inhibition of anaerobic waste degradation has been extensively investigated on a laboratory scale. It is hence well known that at ammonium levels above 2500 mg/l, methanogenic bacteria are inhibited, which leads to both reduced methane (CH4) production and increased organic pollution of the leachate. In the present paper, and for the first time, data on a full-scale landfill indicating ammonia inhibition of waste degradation is presented. The leachate of the landfill is characterized by extremely high concentrations of chloride (up to 70,000 mg/l) and ammonium–nitrogen (up to 20,000 mg/l). These high pollution levels are explained by the following facts: first, the landfill is located in an arid climate (annual precipitation of 200 mm), resulting in low fresh water infiltration; and second, leachate or concentrate resulting from reverse osmosis treatment at the site has been recirculated. The high ammonium levels obviously caused inhibitory effects on the anaerobic degradation, which resulted in chemical oxygen demand concentrations in the leachate of far above 300,000 mg/l. Furthermore, a comparatively low level of landfill gas (LFG) generation and a shift towards higher carbon dioxide and lower CH4 contents in the collected LFG was observed. Based on the gas compositional data, the overall reduction in CH4 generation was assessed to be 50%. In order to reduce organic leachate pollution and to enhance LFG production at the site investigated, fresh (rain) water infiltration should be enhanced and the recirculation of leachate or treatment residues derived thereof should be terminated.

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Section: Climatic Conditions At the Landfill Sitementioning

confidence: 99%

Section: Leachate Data Of the Landfillmentioning

confidence: 99%