The bacterial quality of salad crops drip and furrow irrigated with waste stabilization pond effluent: An evaluation of the who guidelines

The natural waste stabilization pond of Vauciennes, located in the north of France, underwent regular monitoring from October 1981 to July 1991, within the framework of a programme studying the evolution of operation parameters related to the ageing of plants. This study enabled us to assess the variations in the quality of the discharge depending on the season, in particular concerning the nitrogen and phosphorus parameters. The input/output reports made it possible to make specifications concerning the variations of the loads to be treated and the overloads caused by rainy episodes, and the real performances of the plants in relation to rainfall, evaporation, hydraulic exchanges with the soil and interannual seasonal variations. The evolution of the treatment, characterised by the parameters of the treated effluent, was observed, on the basis of equivalent climate conditions. Lastly, the growth of the deposits and their location in the first pond observed based on the systematic establishment of a cartography of the bottom of the pond.

Download Full-text

The bacterial quality of salad crops drip and furrow irrigated with waste stabilization pond effluent: an evaluation of the who guidelines

Water Science & Technology ◽

10.2166/wst.1995.0511 ◽

1995 ◽

Vol 31 (12) ◽

pp. 425-430 ◽

Cited By ~ 7

Author(s):

R. K. X. Bastos ◽

D. D. Mara

Keyword(s):

Wastewater Reuse ◽

Weather Conditions ◽

Climatic Conditions ◽

World Health ◽

Stabilization Pond ◽

Waste Stabilization Pond ◽

Waste Stabilization ◽

Contamination Levels ◽

Health Organization

Field- and glasshouse-grown lettuces and radishes were drip- and furrow-irrigated with waste stabilization pond effluent and with trickling filter effluent diluted with clean water. Crop contamination levels varied considerably. Under dry weather conditions they were at worst of the orders of 103 and 104E. coli per 100 g (fresh weight) for radishes and lettuces, respectively; salmonellae were always absent. The bacterial quality of experimental lettuces was similar to those of lettuces on sale in local markets. When rainfall occurred E. coli numbers increased and salmonellae were isolated from lettuce surfaces. These results are interpreted as partially, substantiating the current World Health Organization bacteriological guideline for unrestricted wastewater reuse, but suggest the need for further assessment on the variation in crop contamination caused by climatic conditions.

Download Full-text

Removal of escherichia coli using waste stabilization pond: A simulation in climatic conditions of Libya

E3S Web of Conferences ◽

10.1051/e3sconf/20198506013 ◽

2019 ◽

Vol 85 ◽

pp. 06013

Author(s):

Adel Faskol ◽

Gabriel Racoviţeanu

Keyword(s):

Escherichia Coli ◽

Hydraulic Retention Time ◽

Important Determinant ◽

Climatic Conditions ◽

Who Guidelines ◽

E Coli ◽

Stabilization Pond ◽

Waste Stabilization Pond ◽

Waste Stabilization

The most important determinant when recycling of wastewater for agriculture is that related to public health. This paper investigates the removal of Escherichia Coli/coliform in the waste stabilization pond as simulation as assessing of mitigating health risk. A case study in climatic conditions of Libya. As a result of a computer program based waste stabilization pond design based on parameter uncertainty and 10,000-trial Monte Carlo simulations, were developed for a series of anaerobic, facultative and maturation ponds to produce on a 95%-ile value <1000 E. Coli per 100 ml. While a number of influent of E. Coli bacteria was (156.732×106 E. Coli /100ml). Where it decreased was a number of the effluent (10 E. Coli /100ml). Where the efficiency of removal E. Coli bacteria was (99.999 %). And the overall hydraulic retention time it took 89.548 days in the anaerobic pond, facultative pond, first maturation pond and twelve of the subsequent maturation ponds. To satisfy practice 2006 WHO guidelines for the safe use of wastewater in agriculture.

Download Full-text

Removal of nitrogen and phosphorus from waste stabilization pond effluents using aerated blast-furnace-slag filters

Future Energy, Environment and Materials ◽

10.2495/feem130861 ◽

2014 ◽

Cited By ~ 1

Author(s):

R. Hamdan ◽

D.D. Mara

Keyword(s):

Blast Furnace ◽

Blast Furnace Slag ◽

Nitrogen And Phosphorus ◽

Stabilization Pond ◽

Waste Stabilization Pond ◽

Waste Stabilization ◽

Furnace Slag

Download Full-text

Sewage Treatment by Waste Stabilization Pond Systems

Journal of Energy and Natural Resource Management ◽

10.26796/jenrm.v3i1.52 ◽

2018 ◽

Vol 3 (1) ◽

pp. 7-14

Author(s):

J. Kenneth, R. S. Suglo

Keyword(s):

Management Practices ◽

Sewage Treatment ◽

Oxygen Demand ◽

Wastewater Management ◽

Stabilization Pond ◽

Waste Stabilization Pond ◽

Quality Guidelines ◽

Waste Stabilization ◽

High Reduction ◽

Wastewater Samples

Sewage generated in Ghana is commonly discharged into the environment without any form of treatment to reduce the degree ofcontamination and mitigate potential public health and environmental issues. Although some attempts have been made in someparts of Ghana to utilize the waste stabilization pond (WSP) system to treat domestic sewage, the ponds often fail to achievetheir purpose due to lack of basic maintenance and supervision. To assess the utility of the WSP system for treating sewage,wastewater samples were collected from the raw sewage, anaerobic, facultative and maturation ponds of WSPs at Obuasi inGhana, and analyzed for physicochemical and microbiological contaminants. The results show that the final pond effluent meetsrecommended microbiological and chemical quality guidelines. The waste stabilization pond system demonstrates high removalefficiencies of wastewater contaminants. The biochemical oxygen demand, total suspended solids, nitrate and faecal coliformsreduction efficiencies of 97.3%, 97.6%, 83.3% and 99.94% respectively are highly significant, and compare well with reportedremoval efficiencies in the literature. Additionally, the ponds have high reduction efficiencies for heavy metals and pathogenicmicroorganisms. The wastewater treatment system complies with standard wastewater management practices, and provides auseful method for treating and disposing wastewater in Ghana.

Download Full-text

Rotavirus removal in experimental waste stabilization pond systems with different geometries and configurations

Water Science & Technology ◽

10.2166/wst.1995.0497 ◽

1995 ◽

Vol 31 (12) ◽

pp. 285-290 ◽

Cited By ~ 4

Author(s):

J. I. Oragui ◽

H. Arridge ◽

D. D. Mara ◽

H. W. Pearson ◽

S. A. Silva

Keyword(s):

Clostridium Perfringens ◽

Slow Process ◽

Faecal Coliforms ◽

Waste Stabilization Ponds ◽

Stabilization Pond ◽

Waste Stabilization Pond ◽

Stabilization Ponds ◽

Waste Stabilization

Rotavirus removal in waste stabilization ponds is a relatively slow process: in a series of ten ponds (a 1-d anaerobic pond followed by nine 2-d ponds) its numbers were reduced from 1.4 × 105 per litre to zero, and in an “innovative” series (a 1-day anaerobic pond, 3-d facultative pond, 3.8-d, 3-d and 5-d maturation ponds) from 5.1 × 104 per litre to <5 per litre. Faecal coliforms were better indicators of rotaviruses than was Clostridium perfringens .

Download Full-text