Trophic status, phytoplankton diversity, and water quality at Kafr El-Shinawy drinking-water treatment plant, Damietta

Abstract

This work aims to study the seasonal fluctuation in physicochemical characteristics, trophic status, and some pollutants influencing phytoplankton diversity, and water quality at a compact Kafr El-Shinawy drinking-water treatment plant, Damietta – Egypt seasonally during 2018. Phytoplankton distribution was affected by the trophic status of water, level of pollutants, and physicochemical treatment processes of water. The predominance of phytoplankton species, especially Aphanizomenon flos aquae (Cyanophyta), Gomphosphaeria lacustris (Cyanophyta), Microcystis aeruginosa (Cyanophyta), Nostoc punctiforme (Cyanophyta), Oscillatoria limnetica (Cyanophyta), Pediastrum simplex (Chlorophyta), and Melosira granulata (Bacillariophyta) in treated water was much less than that in raw water. Trihalomethanes (THMs) levels in treated waters were higher than in raw water, while lower concentrations of heavy metals were recorded in treated water. Intracellular levels of microcystins were lower, whereas the extracellular levels were higher in treated water than raw water, and the former recorded the highest level in raw water during summer. Hence, the levels of dissolved microcystins and THMs in treated water were higher especially during summer, the season of luxurious growth of Microcystis species. Trophic state index (TSI) was relatively high in raw water compared with treated water due to high concentrations of nutrients (total-P, total-N, nitrite, nitrate, and ammonia) in raw water.

Distribution of antibiotic resistance genes and antibiotic residues in drinking water production facilities: Links to bacterial community

“…The findings of NW-E DWPFs could be attributed to the sedimentation process that allows suspended particles to settle out [ 32 ]. Similar nitrite trends in which nitrite levels decreased from raw to treated water were also observed in Jiangsu Province, China and Kafr El-Shinawy, Damietta, Egypt [ 31 ]. Overall, the nitrate and nitrite levels measured in NW-E and NW-C DWPFs were within the target water quality range (0–6 mg/L) of [ 23 ] for domestic use.…”

“…This was not the case in the DWPF situated NW-E. Furthermore, in Bayas, Ecuador [ 30 ] and Kafr El-Shinawy, Egypt [ 31 ], phosphate and nitrate levels are always lower in treated water. The latter studies focussed on the water quality of raw and treated water.…”

Biomonitoring of Benthic Diatoms as Indicators of Water Qual-ity, Assessing the Present and Projecting the Future: A Review

“…(78) Variations in water temperature strongly affect the composition and growth of the phytoplankton community. (79) high turbidity levels reduce light penetration and thus limit phytoplankton growth. (80) Other important factors such as altitude and conductivity are explained in, (81) nitrites and silicates (82) nitrates and total phosphorus (83) and pH (84) in conclusion, diatom research should focus on ecosystem processes and functional characteristics of the assemblages where the fundamental approach would be to link the evaluation of water quality with environmental variables, structure and function of ecosystems, i.e.…”

Pollutions and Incidence of Liver and Breast Cancer in Damietta Governorate, Egypt: A Multiregional Analysis

“…Summertime is when the amounts of intracellular and extracellular (dissolved) microcystins were highest. Damietta city water had intracellular microcystin levels as 1.70 μg L −1 in summer and 0.71 μg L −1 in winter(Deyab et al 2021).…”

“…The predominance of phytoplankton species, especially M. aeruginosa (Cyanobacteria), Oscillatoria limnetica (Cyanobacteria), Pediastrum simplex (Chlorophyta), and Melosira granulate (Bacillariophyta) in raw water were documented by El-Adl et al (2020). Furthermore, it was found that the water sources under investigation included both dissolved (extracellular) and cell-bound (intracellular) microbial toxins Deyab et al (2021). reported that season and water treatment had a substantial effect on the levels of intracellular and extracellular microcystin, with water treatment having a greater effect than season.…”