Entrapped cells-based-anaerobic membrane bioreactor treating domestic wastewater: Performances, fouling, and bacterial community structure

In this study, the effects of plants on the performance and bacterial community structure of palm mulch-based vertical flow constructed wetlands was studied. The wetlands were built in August 2013; one of them was planted with Canna indica and Xanthosoma sp., and the other one was not planted and used as a control. The experimental period started in September 2014 and finished in June 2015. The influent was domestic wastewater, and the average hydraulic surface loading was 208 L/m2d, and those of COD, BOD, and TSS were 77, 57, and 19 g/m2d, respectively. Although the bed without plants initially performed better, the first symptoms of clogging appeared in December 2014, and then, its performance started to fail. Afterwards, the wetland with plants provided better removals. The terminal restriction fragment length polymorphism (T-RFLP) analysis of Enterococci and Escherichia coli in the effluents suggests that a reduction in their biodiversity was caused by the presence of the plants. Thus, it can be concluded that the plants helped achieve better removals, delay clogging, and reduce Enterococci and E. coli biodiversity in the effluents.

Download Full-text

The bacterial community structure of submerged membrane bioreactor treating synthetic hospital wastewater

Bioresource Technology ◽

10.1016/j.biortech.2019.121362 ◽

2019 ◽

Vol 286 ◽

pp. 121362 ◽

Cited By ~ 7

Author(s):

Bhagyashree Tiwari ◽

Balasubramanian Sellamuthu ◽

Sarah Piché-Choquette ◽

Patrick Drogui ◽

Rajeshwar D. Tyagi ◽

...

Keyword(s):

Community Structure ◽

Bacterial Community ◽

Bacterial Community Structure ◽

Membrane Bioreactor ◽

Hospital Wastewater ◽

Submerged Membrane Bioreactor

Download Full-text

Microbial community and antibiotic resistance profiles of biomass and effluent are distinctly affected by antibiotic addition to an anaerobic membrane bioreactor

Environmental Science Water Research & Technology ◽

10.1039/c9ew00913b ◽

2020 ◽

Vol 6 (3) ◽

pp. 724-736 ◽

Cited By ~ 2

Author(s):

Ali Zarei-Baygi ◽

Moustapha Harb ◽

Phillip Wang ◽

Lauren B. Stadler ◽

Adam L. Smith

Keyword(s):

Antibiotic Resistance ◽

Community Structure ◽

Microbial Community ◽

Resistance Gene ◽

Microbial Community Structure ◽

Membrane Bioreactor ◽

Antibiotic Resistance Gene ◽

Domestic Wastewater ◽

Bench Scale ◽

Anaerobic Membrane Bioreactor

A bench-scale AnMBR was operated for the treatment of domestic wastewater containing antibiotics and evaluated microbial community structure and antibiotic resistance gene dynamics in both the biomass and effluent.

Download Full-text

Effect of earthworm loads on organic matter and nutrient removal efficiencies in synthetic domestic wastewater, and on bacterial community structure and diversity in vermifiltration

Water Science & Technology ◽

10.2166/wst.2013.178 ◽

2013 ◽

Vol 68 (1) ◽

pp. 43-49 ◽

Cited By ~ 17

Author(s):

L. M. Wang ◽

X. Z. Luo ◽

Y. M. Zhang ◽

J. J. Lian ◽

Y. X. Gao ◽

...

Keyword(s):

Organic Matter ◽

Community Structure ◽

Bacterial Community ◽

Bacterial Community Structure ◽

Removal Rate ◽

Oxygen Demand ◽

Domestic Wastewater ◽

Ammonia Nitrogen ◽

Domestic Sewage ◽

Shannon Index

In this paper, we studied the effect of earthworm loads on the removal rates of chemical oxygen demand (COD), ammonia nitrogen (NH3-N), total nitrogen, and total phosphorus from synthetic domestic sewage and on the bacterial community structure and diversity of substrates in earthworm packing beds. The different vermifiltrations (VFs), including the control, are successful in removing both organic matter (OM) and nutrients. The removal rate of NH3-N at 12.5 g of earthworm/L of soil VF is higher compared with that at 0 and 4.5 earthworm load VFs. The highest Shannon index, in the earthworm packing bed, occurred at 16.5 earthworm load VF. Furthermore, the COD removal rate is significantly correlated with the Shannon index, which reveals that OM removal for synthetic domestic sewage treatment at VF might be more dependent on bacterial diversity at the earthworm packing bed. The band distributions and diversities of the bacterial community for samples from different earthworm loads in VFs suggest that the bacterial community structure was only affected within the earthworm packing bed when the earthworm load reached a certain level. The present study adds to the current understanding of OM and nutrient degradation processes in VF domestic wastewater treatment.

Download Full-text