Spatial–temporal variation of treatment performance and bacterial community diversity in a hybrid constructed wetland

Khouja, Ibtissem; Sullivan-Sealey, K.M.; Mhiri, F.; Ouzari, Hadda‐Imene; Saidi, Nurdin

doi:10.1007/s13762-020-02648-6

Cited by 11 publications

(4 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In agreement with other work, our study confirmed the changes in bacterial communities from influent to effluent, since many DNA bands present in the influent appeared to be absent from the DGGE pattern in the effluent, with new DNA bands appearing [15,35,57].…”

Section: Bacterial Community Structuresupporting

confidence: 92%

“…Similar studies reported high rates of these quality parameters in raw wastewater influent at WW plants from Tunisia and Algeria, with values up to 1720, 1450, and 747 mg/L for COD, TSS, and BOD 5 , respectively [34][35][36]. In the other hand, other research showed that the average effluent content of several quality parameters like COD, BOD 5 , TSS, and NO 3 − showed an increase as compared to treated wastewater samples [37,38].…”

Section: Water Quality Monitoringmentioning

confidence: 67%

“…However, the profiles showed similar intense DNA bands of medium migration for the different samples. Likewise, Khouja et al [35], during a DGGE study in wastewater treatment plants, showed clear variations in bacterial abundance and microbial diversity species between treatment steps. This last study underlined the importance of this technique in a specific microbiological investigation.…”

Section: Bacterial Community Structurementioning

confidence: 88%

“…Furthermore, Afsa et al [37] observed similar results in the COD/BOD 5 ratio in wastewater ranging between 1.7 ± 0.5, 3.0 ± 0.3, and 2.2 ± 0.2 for WWTP influents, WWTP effluents, and seawater, respectively. Several studies suggest that a biodegradation process could be expected in this case [35,37,43].…”

Section: Water Quality Monitoringmentioning

confidence: 99%

See 3 more Smart Citations

Chemical and Microbiological Assessment of Wastewater Discharged along the Mediterranean Sea

et al. 2022

View full text Add to dashboard Cite

The large discharges of wastewater in different natural receiving environments, particularly the marine environment, have massively contributed to pollution. This study examined the physicochemical and microbiological quality of wastewater discharged along the Mediterranean Sea. This investigation is one of the few works carried out by scientists along with the Mediterranean countries. Wastewater sampling was carried out in Egypt, Morocco, Algeria, Tunisia, and Italy. Analyses confirmed that the quality of treated wastewater was always better than the ones registered as raw wastewater. In addition, the quality of the treated wastewater and seawater appeared to be adequate and satisfied the standard and recommended limits in vigor in all these Mediterranean countries. These results showed that the wastewater treatment process used in Italy allowed a higher reduction in most tested parameters (COD: 80.44%, BOD5: 58.9%, OM: 70.74%, TOC: 78.4%). The bacteriological quality of these waters and their diversification was assessed by the denaturing gradient gel electrophoresis (DGGE) technique. Firmicutes, Gamma-Proteobacteria, and Beta-Proteobacteria in 42% of the DGGE DNA bands, and predominately some lineages affiliated to cultivable and non-cultivable clones of Bacteroides (58%), were found. The examination of antibiotic susceptibility at the level of 18 strains isolated from various arbitrary water samples showed that most of these isolates exhibited resistance to at least one antibiotic family, and 11 isolates exhibited 100% resistance against aztreonam. This result confirms the large antibiotic-resistance spreading and circulation registered these last decades in the natural environment, conditioned by the extensive and non-controlled use of antibiotics for human therapy and animal feeding.

show abstract

Section: Bacterial Community Structuresupporting

confidence: 92%