A pilot-scale study of peracetic acid and ultraviolet light for wastewater disinfection

2019 ◽  
Vol 5 (8) ◽  
pp. 1453-1463 ◽  
Author(s):  
Abdulrahman H. Hassaballah ◽  
Jeremy Nyitrai ◽  
Christine H. Hart ◽  
Ning Dai ◽  
Lauren M. Sassoubre
Keyword(s):  
Ultraviolet Light ◽  
Peracetic Acid ◽  
Pilot Scale ◽  
Fecal Coliforms ◽  
Treated Wastewater ◽  
E Coli ◽  
Wastewater Disinfection ◽  
Somatic Coliphage

At the pilot-scale, peracetic acid effectively inactivates fecal coliforms,E. coliandEnterococcusspp. in secondary and tertiary treated wastewater. The addition of UV to PAA treatment increases inactivation of somatic coliphage.

Inactivation of E. coli, Enterococcus spp., somatic coliphage, and Cryptosporidium parvum in wastewater by peracetic acid (PAA), sodium hypochlorite, and combined PAA-ultraviolet disinfection

2020 ◽  
Vol 6 (1) ◽  
pp. 197-209 ◽  
Author(s):  
Abdulrahman H. Hassaballah ◽  
Tanmay Bhatt ◽  
Jeremy Nyitrai ◽  
Ning Dai ◽  
Lauren Sassoubre
Keyword(s):  
Sodium Hypochlorite ◽  
Cryptosporidium Parvum ◽  
Peracetic Acid ◽  
Ecosystem Health ◽  
Ultraviolet Disinfection ◽  
E Coli ◽  
Enterococcus Spp ◽  
Wastewater Disinfection ◽  
Somatic Coliphage

Wastewater disinfection is important to protect human and ecosystem health.

scholarly journals Ultrafiltration Process in Disinfection and Advanced Treatment of Tertiary Treated Wastewater

Membranes ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 221
Author(s):  
Rafał Tytus Bray ◽  
Katarzyna Jankowska ◽  
Eliza Kulbat ◽  
Aneta Łuczkiewicz ◽  
Aleksandra Sokołowska
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plants ◽  
Microscopic Analysis ◽  
Fecal Coliforms ◽  
Treated Wastewater ◽  
Chemical Parameters ◽  
Virus Particles ◽  
E Coli ◽  
The One ◽  
Physical And Chemical

The paper presents the results of research on the use of ultrafiltration, using membranes of 200 and 400 kDa separation, for disinfection of municipal treated wastewater. The research was conducted on a fractional technical scale using real municipal treated wastewater from two large wastewater treatment plants treating most of the wastewater over the one-million polycentric Gdańsk agglomeration (1.2 million inhabitants). UF 200 kDa and UF 400 kDa processes enabled further improvement of the physical and chemical parameters of treated wastewater. Total phosphorus (to below 0.2 mg/L–UF 200 kDa, 0.13 mg/L–UF 400 kDa) and turbid substances (to below 0.2 mg/L, both membranes) were removed in the highest degree. COD was reduced efficiently (to below 25.6 mgO2/L–UF 200 kDa, 26.8 mgO2/L–UF 400 kDa), while total nitrogen was removed to a small extent (to 7.12 mg/L–UF 200 kDa and 5.7 mg/L–UF 400 kDa. Based on the reduction of indicator bacteria; fecal coliforms including E. coli (FC) and fecal enterococci (FE) it was found that the ultrafiltration is an effective method of disinfection. Not much indicator bacterial were observed in the permeate after processes (UF 200 kDa; FC—5 CFU/L; FE—1 CFU/L and UF 400 kDa; FC—70 CFU/L; FE—10 CFU/L. However, microscopic analysis of prokaryotic cells and virus particles showed their presence after the application of both membrane types; TCN 3.0 × 102 cells/mL–UF 200 kDa, 5.0 × 103 cells/mL–UF 400 kDa, VP 1.0 × 105/mL. The presence of potentially pathogenic, highly infectious virus particles means that ultrafiltration cannot be considered a sufficient disinfection method for treated wastewater diverted for reuse or discharged from high load wastewater treatment plants to recreational areas. For full microbiological safety it would be advisable to apply an additional disinfection method (e.g., ozonation).

Diversity of fecal coliforms and their antimicrobial resistance patterns in wastewater treatment model plant

2010 ◽  
Vol 61 (6) ◽  
pp. 1383-1392 ◽  
Author(s):  
A. Łuczkiewicz ◽  
S. Fudala-Książek ◽  
K. Jankowska ◽  
B. Quant ◽  
K. Olańczuk-Neyman
Keyword(s):  
Wastewater Treatment ◽  
Antimicrobial Agents ◽  
Selective Medium ◽  
Fecal Coliforms ◽  
Treated Wastewater ◽  
Treatment Model ◽  
E Coli ◽  
Model Plant ◽  
Resistance Patterns ◽  
Activated Sludge Processes

The occurrence of resistance patterns among wastewater fecal coliforms was determined in the study. Susceptibility of the isolates was tested against 19 antimicrobial agents: aminoglycosides, aztreonam, carbapenems, cephalosporines, β-lactam/β-lactamase inhibitors, penicillines, tetracycline, trimethoprim/sulfamethoxazole, and fluoroquinolones. Additionally the removal of resistant isolates was evaluated in the laboratory-scale wastewater treatment model plant (M-WWTP), continuously supplied with the wastewater obtained from the full-scale WWTP. Number of fecal coliforms in raw (after mechanical treatment) and treated wastewater, as well as in aerobic chamber effluent was determined using selective medium. The selected strains were identified and examined for antibiotic resistance using Phoenix Automated Microbiology System (BD Biosciences, USA). The strains were identified as Escherichia coli (n = 222), Klebsiella pneumoniae ssp. ozaenae (n = 9), and Pantoea agglomerans (n = 1). The isolate of P. agglomerans as well as 48% of E. coli isolates were sensitive to all antimicrobials tested. The most frequent resistance patterns were found for ampicillin: 100% of K. pneumoniae ssp. ozaenae and 41% of E. coli isolates. Among E. coli isolates 12% was regarded as multiple antimicrobial resistant (MAR). In the studied M-WWTP, the applied activated sludge processes reduced considerably the number of fecal coliforms, but increased the ratio of antimicrobial-resistant E. coli isolates to sensitive ones, especially among strains with MAR patterns.

Advanced wastewater disinfection technologies: short and long term efficiency

1998 ◽  
Vol 38 (12) ◽  
pp. 109-117 ◽  
Author(s):  
V. Lazarova ◽  
M. L. Janex ◽  
L. Fiksdal ◽  
C. Oberg ◽  
I. Barcina ◽  
...  
Keyword(s):  
Peracetic Acid ◽  
Contact Time ◽  
Pilot Scale ◽  
Coli Strain ◽  
Plate Count ◽  
Galactosidase Activity ◽  
Virus Removal ◽  
E Coli ◽  
Bacteriophage Ms2 ◽  
Short And Long Term

Advanced disinfection processes (peracetic acid, UV irradiation and ozonation) have been tested and evaluated through bench and pilot scale studies. 3 log removals of total coliforms, faecal coliforms and faecal streptococci were achieved by 10mg/L peracetic acid at a 10min contact time, by UV radiation at 35mW.s/cm2 and by ozone at 5mg/L for 10min contact time. Higher doses are required for virus removal by UV and PAA and especially for highly resistant viruses such as F-specific bacteriophage MS2. Ozonation has the advantage of having a strong effect on all types of bacteriophages and protozoa cysts even when low treatment doses and short contact times are applied. The results of this study demonstrated that evaluation of disinfection efficiency of ozone, UV and PAA depends on the criteria and methods employed. Standard method (plate count) results showed an important disinfection effect on culturability, while results from non-standard methods (respiratory activity and β-galactosidase activity assay) indicated less reduction of viable cells. Moreover, the results confirm that disinfectants act on bacteria in different ways. It has been clearly demonstrated that b-galactosidase activity is affected by PAA while UV treatment has no or very limited effect on the enzyme activity. Even without sunlight reactivation, bacterial regrowth in seawater was observed after disinfection of sewage effluents. This study also shows that the biodegradability of sewage effluent for an E coli strain was affected differently by the oxidative disinfectants ozone and PAA. Biodegradability should therefore be considered when evaluating the total disinfection efficiency.

Peracetic acid for secondary effluent disinfection: a comprehensive performance assessment

2013 ◽  
Vol 68 (12) ◽  
pp. 2638-2644 ◽  
Author(s):  
M. Antonelli ◽  
A. Turolla ◽  
V. Mezzanotte ◽  
C. Nurizzo
Keyword(s):  
Peracetic Acid ◽  
Vibrio Fischeri ◽  
Pilot Scale ◽  
Selenastrum Capricornutum ◽  
Coliform Bacteria ◽  
Secondary Effluent ◽  
Indicator Organisms ◽  
E Coli ◽  
Comprehensive Performance

The paper is a review of previous research on secondary effluent disinfection by peracetic acid (PAA) integrated with new data about the effect of a preliminary flash-mixing step. The process was studied at bench and pilot scale to assess its performance for discharge in surface water and agricultural reuse (target microorganisms: Escherichia coli and faecal coliform bacteria). The purposes of the research were: (1) determining PAA decay and disinfection kinetics as a function of operating parameters, (2) evaluating PAA suitability as a disinfectant, (3) assessing long-term disinfection efficiency, (4) investigating disinfected effluent biological toxicity on some aquatic indicator organisms (Vibrio fischeri, Daphnia magna and Selenastrum capricornutum), (5) comparing PAA with conventional disinfectants (sodium hypochlorite, UV irradiation). PAA disinfection was capable of complying with Italian regulations on reuse (10 CFU/100 mL for E. coli) and was competitive with benchmarks. No regrowth phenomena were observed, as long as needed for agricultural reuse (29 h after disinfection), even at negligible concentrations of residual disinfectant. The toxic effect of PAA on the aquatic environment was due to the residual disinfectant in the water, rather than to chemical modification of the effluent.

Secondary effluent reclamation: combination of pre-treatment and disinfection technologies

2008 ◽  
Vol 57 (12) ◽  
pp. 1963-1968 ◽  
Author(s):  
L. Alcalde ◽  
M. Folch ◽  
J. C. Tapias ◽  
F. Martínez ◽  
S. Enguídanos ◽  
...  
Keyword(s):  
Ultraviolet Light ◽  
Chlorine Dioxide ◽  
Peracetic Acid ◽  
Additional Treatment ◽  
Secondary Effluent ◽  
E Coli ◽  
Disinfection Methods ◽  
Physico Chemical ◽  
Treatment Train ◽  
Pre Treatment

A study was carried out to evaluate the efficiency of secondary effluent additional treatment, using a combination of pre-treatments (ring filter, physico-chemical and infiltration-percolation) followed by disinfection methods (chlorine dioxide, peracetic acid and ultraviolet light). Three different indicator microorganisms were determined: E. coli, total coliforms and somatic bacteriophages. The results show better efficiency of physico-chemical and infiltration-percolation processes. Bacteriophages were eliminated to a lesser extent than bacterial indicators in all the treatment systems. Chlorine dioxide and peracetic acid seems to be more efficient in disinfection than ultraviolet light when a ring filter is the pre-treatment used. For the same doses and contact times, the efficiency of the disinfection methods is higher when the pre-treatment used is the physico-chemical or the infiltration-percolation system. The final effluent quality from the physico-chemical treatment train and the infiltration-percolation treatment train, followed by the disinfectants, achieves an E. coli content that allows the reuse in most of the uses described in the Spanish legislation for wastewater reuse.

scholarly journals Simultaneous removal of estrogens and pathogens from secondary treated wastewater by solar photocatalytic treatment

2014 ◽  
Vol 16 (3) ◽  
pp. 543-552 ◽  
Keyword(s):  
Solar Radiation ◽  
Estrogenic Activity ◽  
Treated Wastewater ◽  
Simultaneous Removal ◽  
E Coli ◽  
Water Matrix ◽  
Treated Effluent ◽  
Emerging Compounds ◽  
Wastewater Disinfection ◽  
Water And Wastewater

<p>Recently, the fate of emerging compounds in environmentally relevant samples has attracted considerable attention. Solar semiconductor photocatalysis may offer an appealing methodology to treat such contaminants. At the same time the use of solar photocatalysis for water and wastewater disinfection is a topic well-documented in the literature. In this respect, the simultaneous degradation of synthetic estrogen 17α-ethynylestradiol (EE2) and <em>Escherichia coli </em>removal employing simulated solar radiation and TiO<sub>2</sub> as the photocatalyst was investigated. In general, the more complex the water matrix is the slower <em>E. coli</em> removal becomes, while the presence of <em>E. coli</em> in the reaction mixture did not obstruct EE2 removal.</p> <div> <p>Although EE2 removal occurred relatively fast, overall estrogenic activity was only partially removed. This implies that other species inherently present in the effluent and/or some photocatalytic transformation by-products may be proportionately more estrogenic than EE2. Overall, the use of solar radiation can constitute an advantageous treatment strategy for the simultaneous removal of micro-pollutants and pathogens from secondary treated effluent.</p> </div> <p>&nbsp;</p>

Disinfection of tertiary wastewater effluent prior to river discharge using peracetic acid; treatment efficiency and results on by-products formed in full scale tests

2013 ◽  
Vol 68 (8) ◽  
pp. 1852-1856 ◽  
Author(s):  
Per Overgaard Pedersen ◽  
Erling Brodersen ◽  
David Cecil
Keyword(s):  
Peracetic Acid ◽  
Full Scale ◽  
Treated Wastewater ◽  
Decomposition Products ◽  
Sand Filter ◽  
E Coli ◽  
Log Reduction ◽  
Before And After ◽  
Full Scale Tests ◽  
P Removal

This is an investigation of chemical disinfection, with peracetic acid (PAA), in a tertiary sand filter at a full scale activated sludge plant with nitrification/denitrification and P-removal. The reduction efficiency of Escherichia coli and intestinal enterococci in the sand filter is reported. E. coli log reductions of between 0.4 and 2.2 were found with contact times from 6 to 37 min and with dosing from 0 to 4.8 mg L−1. The average log reduction was 1.3. The decomposition products, bromophenols, chlorophenols and formaldehyde and residual H2O2 were measured before and after the sand filter. The residual H2O2 concentration in the effluent was critical at short contact times and high dosages of PAA due to the discharge limit of 25 μg L−1. The other three products could not be detected at 0.1 μg L−1 levels. The chemical cost of PAA dosing is estimated to be 0.039 US$ m−3 treated wastewater.

Uniform protocol for wastewater UV validation applications

2013 ◽  
Vol 8 (1) ◽  
pp. 83-94
Author(s):  
G. E. Whitby ◽  
O. Lawal ◽  
P. Ropic ◽  
S. Shima ◽  
B. Ferran ◽  
...  
Keyword(s):  
Wastewater Treatment Plants ◽  
Geometric Mean ◽  
Treatment Plant ◽  
Fecal Coliforms ◽  
Treated Wastewater ◽  
E Coli ◽  
Delivery Performance ◽  
Regulatory Bodies ◽  
Treatment Objective ◽  
Uv Dose

The treatment objective of an ultraviolet disinfection system used in a wastewater application is to protect the aquatic environment and users of water that receive discharges from wastewater treatment plants. To ensure this objective is adequately met it is important to validate, or verify equipment performance for a specific application. The widely accepted method for completing this validation is by determining the UV dose delivery performance using biodosimetry. Until now a standard bioassay did not exist for UV equipment that is used to disinfect treated wastewater from a biological treatment plant that is achieving an average effluent quality of less than 30 mg/L BOD/TSS and disinfection requirements of 126 cfu/100 mL E. coli over a 30 day geometric mean or 200 cfu/100 mL fecal coliforms over a 30 day geometric mean. A uniform bioassay for wastewater UV equipment that can be widely adopted by industry and regulatory bodies was developed and approved by the International Ultraviolet Association. This bioassay for UV equipment is described.

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