Microbial reduction in wastewater treatment using Fe3+ and Al3+ coagulants and PAA disinfectant

Pradhan, Surendra K.; Kauppinen, Ari; Martikainen, Kati; Pitkänen, Tarja; Kusnetsov, Jaana; Miettinen, Ilkka T.; Pessi, M.; Poutiainen, Hannu; Heinonen‐Tanski, Helvi

doi:10.2166/wh.2013.241

Cited by 12 publications

(14 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…in 50% of samples (2/4) collected after PAA disinfection underscores that the low doses of PAA used (0.99 mg/L and 1.06 mg/L) were likely not sufficient to remove Salmonella contamination in the final effluent. A total reduction of Salmonella (100%) was obtained by Pradhan et al [4] after wastewater disinfection by using a higher PAA concentration (3 mg/L). Another interesting study reported the presence of Salmonella in 28% of PAA disinfected effluents monitored in nine WWTPs along the coast of Venice province (Italy), but the authors did not report the values of the PAA doses used [21].…”

Section: Resultsmentioning

confidence: 96%

Peracetic Acid (PAA) Disinfection: Inactivation of Microbial Indicators and Pathogenic Bacteria in a Municipal Wastewater Plant

Bonetta¹,

Pignata²,

Lorenzi

et al. 2017

Water

View full text Add to dashboard Cite

Abstract:Several studies have noted that treated and untreated wastewaters are primary contributors of a variety of pathogenic microorganisms to the aquatic ecosystem. Conventional wastewater treatment may not be sufficient to achieve microbiologically safe effluent to be discharged into natural waters or reused, thus requiring wastewater effluents to be disinfected. In recent years, peracetic acid (PAA) has been adopted as a disinfectant for wastewater effluents. The aim of this study was to evaluate the disinfection efficiency of PAA at low doses (range 0.99-2.10 mg/L) against microbial indicators and pathogenic bacteria in a municipal wastewater plant. Samples of untreated sewage and effluents before and after PAA treatment were collected seasonally for 1 year and were analysed for pathogenic Campylobacter, Salmonella spp., E. coli O157:H7 and E. coli virulence genes using molecular methods; moreover, the detection of specific microbial indicators (E. coli, faecal coliforms, enterococci, C. perfringens) and Salmonella spp. were carried out using culturing methods. Salmonella spp. DNA was found in all untreated sewage and effluent before PAA treatment, whereas it was recovered in 50% of the samples collected after PAA treatment. Although E. coli O157:H7 was never identified, the occurrence of Shiga-like toxin I amplicons was identified in 75% of the untreated sewage samples, in 50% of the effluents assayed before PAA treatment, and in 25% of the effluents assayed after PAA treatment, whereas the stx2 gene was never found. Campylobacter coli was only detected in one effluent sample before PAA treatment. In the effluents after PAA treatment, a lower load of indicator bacteria was observed compared to the effluents before treatment. The results of this study highlight that the use of low doses of PAA seems to lead to an improvement of the microbiological quality of the effluent, although it is not sufficient to guarantee its suitability for irrigation. These results underscore the need for additional studies to further assess the efficiency of PAA disinfection in municipal wastewater plants.

show abstract

Section: Resultsmentioning

confidence: 96%

Peracetic Acid (PAA) Disinfection: Inactivation of Microbial Indicators and Pathogenic Bacteria in a Municipal Wastewater Plant

Bonetta¹,

Pignata²,

Lorenzi

et al. 2017

Water

View full text Add to dashboard Cite

show abstract

“…Aluminium and iron salts in combination with PAA (3 or 5 mg/L with a contact time of 5 mins) have proven to be effective in tertiary treatment: especially non-sporing bacteria (such as campylobacteria) were eliminated effectively, whereas sporing bacteria (such as clostridia) and F-specific coliphage were more resistant [142]. Furthermore, no reduction in the number of noroviruses, rotaviruses, or adenoviruses as a result of PAA treatment of tertiary effluent was observed [142]. Recently PAA disinfection was studied in combination with the sequential batch biofilter granular reactor (SBBGR) and it was found that with a dose of 1 mg/L of PAA it was possible to reach E. coli < 10 CFU / 100 mL [143].…”

Section: Primary Secondary and Tertiary Wastewater Effluentsmentioning

confidence: 99%

“…PAA has been used as a cooling water biocide [32,162], as it has a good potential for the removal of Legionella pneumophila [142,[163][164][165]. The continuous doses used for Legionella removal varied considerably (3-1000 mg/L) and re-growth after treatment was reported [142,[163][164][165].…”

Section: Industrial Effluentsmentioning

confidence: 99%

“…The continuous doses used for Legionella removal varied considerably (3-1000 mg/L) and re-growth after treatment was reported [142,[163][164][165]. A potentially effective approach for the long-term Legionella control could be an initial high-shock dose, with a smaller, continuous dose administered afterwards [8].…”

Section: Industrial Effluentsmentioning

confidence: 99%

“…The PAA doses and contact times for tertiary effluents vary within the range of 1.5-15 mg/L and 10-36 mins, respectively (see Table 2). Aluminium and iron salts in combination with PAA (3 or 5 mg/L with a contact time of 5 mins) have proven to be effective in tertiary treatment: especially non-sporing bacteria (such as campylobacteria) were eliminated effectively, whereas sporing bacteria (such as clostridia) and F-specific coliphage were more resistant [142]. Furthermore, no reduction in the number of noroviruses, rotaviruses, or adenoviruses as a result of PAA treatment of tertiary effluent was observed [142].…”

mentioning

confidence: 99%

See 2 more Smart Citations

Peracids in water treatment: A critical review

Luukkonen

Pehkonen

2016

Critical Reviews in Environmental Science and Technology

255

122

View full text Add to dashboard Cite

Peracids have gained interest in the water treatment over the last few decades. Peracetic acid (CH 3 CO 3 H) has already become an accepted alternative disinfectant in wastewater disinfection whereas performic acid (CHO 3 H) has been studied much less, although it is also already commercially available. Peracids have also been tested for drinking water disinfection, oxidation of aqueous (micro)pollutants, sludge treatment and ballast water treatment, to name just a few examples. The purpose of this review paper is to represent comprehensive up-to-date information about the water treatment applications, aqueous reaction mechanisms, and disinfection byproduct formation of peracids, namely performic, peracetic and perpropionic acids. and PFA have several of the qualities of an ideal disinfectant: toxicity to microorganisms, but not to higher forms of life; effectivity at ambient temperatures; stability and long shelf-life; low corrosivity; deodorizing ability; widespread availability and reasonable cost [12].PAA and PFA are colorless liquids with characteristic pungent odors. Both are thermodynamically unstable and can decompose spontaneously or explode when highly concentrated, heated, under mechanical stress or exposed to catalytic effects of impurities [1,13,14]. The recommended storage temperatures are below 30 and 20°C for PAA and PFA, respectively [6,14]. Longer carbon chain length increases stability, and thus PAA is more stable than PFA [1]. However, the O-O bond dissociation energy of PFA and PAA has been calculated to be similar: 48 kcal/mol [15]. Percarboxylic acids have typically pK a values 3-4 units higher than the parent carboxylic acids [1]. Nonetheless, PFA and PAA are corrosive [16]. ACCEPTED MANUSCRIPT ACCEPTED MANUSCRIPT 3Exposure to PAA and PFA causes irritation and possibly permanent damage to the skin (cutaneous emphysema), eyes and the respiratory system. In the skin contact, 0.2% is proposed as the no-observed-effect concentration (NOEC) for short and medium length exposure [17].When inhaled, airborne concentrations less than 0.16-0.17 ppm (0.50-0.52 mg/m 3 ) are considered to cause no irritation [17,18]. However, higher concentrations are harmful and a case study suggested that PAA could cause occupational asthma [19].The largest users of PAA on a global scale (estimated in 2013) are shown in Fig. 1. Similar numbers are not available for PFA, but it is probably used at significantly lower quantities.The largest user, the food industry, applies PAA as a disinfectant in fresh produce washing water, clean-in-place (CIP) processes, on food processing equipment, and in pasteurizers, to name just a few examples [21,22]. PFA is also a suitable disinfectant in low-temperature refrigerated food processing and storage rooms [23]. In healthcare, PAA is used for instance in Recently, methods to determine the residual PAA from wastewater were compared: the spectrophotometric method using DPD and catalase was recommended for 0.1-0.5 mg/L PAA concentrations and the cerimetric/iodometric titration...

show abstract

Microbial and viral pathogens in freshwater: current research aspects studied in Germany

et al. 2016

View full text Add to dashboard Cite

Microbial reduction in wastewater treatment using Fe3+ and Al3+ coagulants and PAA disinfectant

Cited by 12 publications

References 3 publications

Peracetic Acid (PAA) Disinfection: Inactivation of Microbial Indicators and Pathogenic Bacteria in a Municipal Wastewater Plant

Peracetic Acid (PAA) Disinfection: Inactivation of Microbial Indicators and Pathogenic Bacteria in a Municipal Wastewater Plant

Peracids in water treatment: A critical review

Microbial and viral pathogens in freshwater: current research aspects studied in Germany

Contact Info

Product

Resources

About