Wastewater disinfection with PAA and UV combined treatment: a pilot plant study

Caretti, Cecilia; Lubello, Claudio

doi:10.1016/s0043-1354(03)00025-3

Cited by 127 publications

(80 citation statements)

References 16 publications

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“…The demand condition models give a more realistic view on the disinfection and the peracid consumption is also expected to have an effect on the treatment efficacy. [81,88,188,189]. For instance, the synergy value for the UV/PAA treatment was 2 log 10 units in one study (i.e., the combined efficiency was 2 log 10 units higher than by directly summing up the individual log 10 inactivation values) [88].…”

Section: Disinfection Kineticsmentioning

confidence: 99%

“…However, from the cost parity point of view, UV/H 2 O 2 and UV/PAA disinfection were claimed to be similar [188]. The advantages of UV/PAA treatment are irreversible damage to microorganisms; a lower dependency on wastewater quality than with UV; better disinfection results on a wider scale of microorganisms; a lower peracid dose and contact time is needed; a smaller UV unit is needed; and cost-competitiveness could be attractive, especially in the case of large facilities [88,189]. The tested UV and PAA doses in the combined treatment have been in the range of 10-300 mW/cm 2 and 0.5-15 mg/L, respectively [88,188,189].…”

Section: Disinfection Kineticsmentioning

confidence: 99%

See 1 more Smart Citation

Peracids in water treatment: A critical review

Luukkonen

Pehkonen

2016

Critical Reviews in Environmental Science and Technology

271

122

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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...

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Section: Disinfection Kineticsmentioning

confidence: 99%

Section: Disinfection Kineticsmentioning

confidence: 99%

Peracids in water treatment: A critical review

Luukkonen

Pehkonen

2016

Critical Reviews in Environmental Science and Technology

271

122

View full text Add to dashboard Cite

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“…Additional hygienic safety can be achieved by combining UV and PAA, which can be classified as an advanced oxidation process (AOP) Koivunen and HeinonenTanski, 2005a;Caretti and Lubello, 2003;Rajala-Mustonen et al, 1997). This UV/PAA synergy is based on an enhanced formation of radicals (e.g., hydroxyl radicals, OH•), which makes the conditions very unfavourable to microbes as the two techniques complement each other (Bianchini et al, 2002).…”

mentioning

confidence: 99%

Chemical aspects of peracetic acid based wastewater disinfection

Luukkonen¹,

Teeriniemi²,

Prokkola³

et al. 2014

WSA

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Peracetic acid (PAA) has been studied for wastewater disinfection applications for some 30 years and has been shown to be an effective disinfectant against many indicator microbes, including bacteria, viruses, and protozoa. One of the key advantages compared to, e.g., chlorine is the lack of harmful disinfection by-products. In this paper a pilot-scale study of PAAbased disinfection is presented. Indicator microbes (E. coli, total coliforms and coliphage viruses) as well as chemical parameters (pH, oxidation-reduction potential (ORP), chemical and biochemical oxygen demand (COD and BOD), and residual PAA and hydrogen peroxide) were studied. The main aim of this investigation was to study how these selected chemical parameters change during PAA treatment. Based on the results, disinfection was efficient at C•t values of 15 to 30 (mg•min)/ℓ which equals to a PAA dose of 1.5 to 2 mg/ℓ and a contact time of 10 to 15 min. In this concentration area changes in pH, COD and BOD were negligible. However, hydrogen peroxide residues may interfere with COD measurements and apparent COD can be higher than the calculated theoretical oxygen demand (ThOD). Additionally PAA or hydrogen peroxide residues interfere with the BOD test resulting in BOD values that are too low. Residual PAA and ORP were found to correlate with remaining amounts of bacteria.

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“…The goal of the current study is to go beyond the well-demonstrated effectiveness of UV and PAA disinfection for municipal wastewaters (38)(39)(40) and to determine the dynamics of pathogenic (UPEC) and nonpathogenic E. coli strains following disinfection. At the same time, the load of antimicrobial resistance genes in potential UPEC isolates was evaluated.…”

mentioning

confidence: 99%

Impact of UV and Peracetic Acid Disinfection on the Prevalence of Virulence and Antimicrobial Resistance Genes in Uropathogenic Escherichia coli in Wastewater Effluents

Biswal

Khairallah

Bibi

et al. 2014

Appl Environ Microbiol

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bWastewater discharges may increase the populations of pathogens, including Escherichia coli, and of antimicrobial-resistant strains in receiving waters. This study investigated the impact of UV and peracetic acid (PAA) disinfection on the prevalence of virulence and antimicrobial resistance genes in uropathogenic Escherichia coli (UPEC), the most abundant E. coli pathotype in municipal wastewaters. Laboratory disinfection experiments were conducted on wastewater treated by physicochemical, activated sludge, or biofiltration processes; 1,766 E. coli isolates were obtained for the evaluation. The target disinfection level was 200 CFU/100 ml, resulting in UV and PAA doses of 7 to 30 mJ/cm 2 and 0.9 to 2.0 mg/liter, respectively. The proportions of UPECs were reduced in all samples after disinfection, with an average reduction by UV of 55% (range, 22% to 80%) and by PAA of 52% (range, 11% to 100%). Analysis of urovirulence genes revealed that the decline in the UPEC populations was not associated with any particular virulence factor. A positive association was found between the occurrence of urovirulence and antimicrobial resistance genes (ARGs). However, the changes in the prevalence of ARGs in potential UPECs were different following disinfection, i.e., UV appears to have had no effect, while PAA significantly reduced the ARG levels. Thus, this study showed that both UV and PAA disinfections reduced the proportion of UPECs and that PAA disinfection also reduced the proportion of antimicrobial resistance gene-carrying UPEC pathotypes in municipal wastewaters.

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Wastewater disinfection with PAA and UV combined treatment: a pilot plant study

Cited by 127 publications

References 16 publications

Peracids in water treatment: A critical review

Peracids in water treatment: A critical review

Chemical aspects of peracetic acid based wastewater disinfection

Impact of UV and Peracetic Acid Disinfection on the Prevalence of Virulence and Antimicrobial Resistance Genes in Uropathogenic Escherichia coli in Wastewater Effluents

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