Parasitological Assessment of Sewage Sludge Samples for Potential Agricultural Reuse in Tunisia

Sabbahi, Sonia; Ayed, Layla Ben; M, Trad; Berndtsson, Ronny; Karanis, Panagiotis

doi:10.3390/ijerph19031657

Cited by 13 publications

(5 citation statements)

References 47 publications

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“…These findings are similar with the studies of. 38,53,54 Simultaneously, the present results are compatible with those of 42,55,56 who reported that A. lumbricoides ova were the most abundant in the MWTP s samples. Generally, the conventional activated sludge system and oxidation ditches were showed to be efficient in the removal of A. lumbricoides and H. nana ova with removal efficiency of 100%.…”

Section: Discussionsupporting

confidence: 92%

Parasitological Evaluation of the Purifying Performance of Wastewater Treatment Plants in Kirkuk, Iraq

Ra’oof Ahmed Barzinji

2024

JCD

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Section: Discussionsupporting

confidence: 92%

Parasitological Evaluation of the Purifying Performance of Wastewater Treatment Plants in Kirkuk, Iraq

Ra’oof Ahmed Barzinji

2024

JCD

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“…Another study in Tunisia also discovered 56.9% of Ascaris spp. eggs in sewage sludge (17). This discovery is also related to research in which helminth eggs were more frequently discovered in sludge in developing nations, where the concentrations can range from 7 to 80 times greater than in developed countries (4).…”

Section: Discussionmentioning

confidence: 83%

The Efficiency of Ascaris Spp. Eggs Inactivation in Sewage Sludge by Lime Dosage, Ammonia Concentration, and Temperature Variation

Shabrina,

Barti Setiani Muntalif,

Mayrina Firdayati

2023

JKL

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Introduction: Ascaris spp. eggs threaten sludge reuse because they are usually more environmentally resistant than other microorganisms. Consequently, the WHO recommended an acceptable limit of <1 helminth egg per gram of total solid as a health-based target for treated feces and fecal sludge and aimed to ascertain the effectiveness and reduction rate of Ascaris spp. eggs in sludge at various lime doses, ammonia concentrations, and temperature values. Methods: Eggs were detected and enumerated using the flotation and sedimentation principle. The reduction process was performed in batches with quick lime doses of 30% and 50% w/w, ammonia concentrations of 1,000 and 5,000 mg/L, and temperatures of 30°C and 50°C. Results and Discussion: The number of eggs of Ascaris spp. fertile in the ponds was 1.38 ± 1.38 eggs/gram to 42.98 ± 13.09 eggs/gram, and the infertile amount was 0.46 ± 0.80 eggs/gram to 17.82 ± 6.55 eggs/gram. Using a temperature of 40°C, 50% CaO, and 5,000 ppm ammonia resulted in the highest percentage of reduction, 97.98 - 98.09% but 1.12 eggs/gram was remaining. Conclusion: Higher pH and ammonia levels primarily affect egg decrease in Ascaris spp. To reduce 99% of Ascaris spp. eggs until it reaches <1 egg/g, a dose of 50% CaO is required, with 5,000 ppm ammonia at a temperature of 40°C for 2.7 hours.

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“…In another study carried out in West Bengal, India, the Ascaris species was the most predominant parasitic ova observed 29 . Ascaris species which is a roundworm affects about a quarter of the world's population 30 , It is one of the resistant intestinal infections that is frequently employed as a parasitological indicator 31 and is more common in developing countries 30 . The possession of a thick outer covering (cuticle) made Ascaris species more resistant to adverse environmental conditions and provides them with a long span in the soil 32 .…”

Section: Discussionmentioning

confidence: 99%

Detection of Parasitic Contamination of Commonly Consumed Vegetables Sold at Obollo-Afor Market, Nigeria

Okwuonu,

Odo

2023

Res. J. Parasitol

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Background and Objective: Vegetables are plant edible components that are eaten whole or in pieces, raw or cooked as part of a main dish or salad. The parasitic fauna of ten different vegetables distributed at Obollo-Afor Market, Enugu State, Nigeria, were investigated. The objective was to determine the prevalence of parasitic contamination of different commonly consumed vegetables sold at Obollo-Afor Market. Materials and Methods: The samples were centrifuged after being cleaned with normal saline and left to stand for 10-12 hrs to allow for sedimentation and the sediments were then inspected under a microscope. Using a modified Zieehl-Nelsen approach, the oocysts of the parasite Cryptosporidium parvum were found in vegetables. A questionnaire was used to gather information about the vegetables. Results:The overall prevalence of parasites found in the vegetables was 44 (36.7%). Ascaris lumbricoides ova (18.3%) was the most prevalent parasite whereas Trichuris ova (0.8%) was the least. False cubeb leaf (60%) was the most contaminated vegetable while African spinach (10%) was the least. As 17 (41.5%) vegetable sellers used clean water for irrigation, 1 (2.4%) used wastewater, 11 (26.8%) used animal (human) faeces as manure, 3 (7.3%) used organic manure whereas 4 (9.8%) used inorganic manure. Conclusion:There is a moderate prevalence of parasitic infestation, probably due to handling procedures from production to sales.

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Parasitological Assessment of Sewage Sludge Samples for Potential Agricultural Reuse in Tunisia

Cited by 13 publications

References 47 publications

Parasitological Evaluation of the Purifying Performance of Wastewater Treatment Plants in Kirkuk, Iraq

Parasitological Evaluation of the Purifying Performance of Wastewater Treatment Plants in Kirkuk, Iraq

The Efficiency of Ascaris Spp. Eggs Inactivation in Sewage Sludge by Lime Dosage, Ammonia Concentration, and Temperature Variation

Detection of Parasitic Contamination of Commonly Consumed Vegetables Sold at Obollo-Afor Market, Nigeria

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