TOC and THMFP reduction by ultrasonic irradiation in wastewater effluent

Kim, I.; Hong, Seong-Soo; Hwang, In Sik; Kwon, Dae-Young; Kwon, Jae Hyun; Huang, Chin‐Pao

doi:10.1016/j.desal.2005.12.032

Cited by 18 publications

(5 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…TOC did not show any significant correlation with any of the parameters studied. However, UV 254 absorbance is an indicator of naturally occurring humic acids in waters (Kim et al 2007). This parameter showed negative correlations with tricloromethane (−0.57) and diclorobromomethane (−0.56).…”

Section: Resultsmentioning

confidence: 99%

Trihalomethanes in the drinking water of Concepción and Talcahuano, Chile

Loyola-Sepúlveda

Lopez-Leal

Muñoz

et al. 2009

Water & Environment J

View full text Add to dashboard Cite

Formation of trihalomethanes (THMs) during water disinfection has been related to several health problems, although the magnitude of these effects is under discussion. This paper quantifies the THMs in drinking water from the Bío-Bío Region of central Chile, the first since the modification of the national reference value (Nch 409/05) to include maximal values for THMs. THMs were quantified using a solid phase micro-extraction (SPME) method and GC-MS. The concentration ranges were 9.7-111.6, 0.1-1.0 and 0.9-25.5 mg/L for chloroform (CHCl 3 ), and dibromochloromethane (CHClBr 2 ) and bromodichloromethane (CHCl 2 Br), respectively. Bromoform was not detected in any sample. There were good correlations (R 2 =0.91-0.98, Po0.001) between the THMs and the residence time of the water, the distance from the treatment plant and an inverse correlation to free chlorine in the water. The Additive Toxicity Index Value (0.07-1.00) showed that all samples were within the Chilean reference value for THMs in drinking water. However, several values were close to exceeding the maximum permitted concentration (200, 100, 100 and 60 mg/L for CHCl 3 , CHBr 3 , CHClBr 2 and CHCl 2 Br, respectively), which may occur when the water demand is low and thus residence times are longer.

show abstract

Section: Resultsmentioning

confidence: 99%

Trihalomethanes in the drinking water of Concepción and Talcahuano, Chile

Loyola-Sepúlveda

Lopez-Leal

Muñoz

et al. 2009

Water & Environment J

View full text Add to dashboard Cite

show abstract

“…The results of studies were carried out with sono-oxidation and showed that degradation of HS, determined by the content of total organic carbon (TOC) was possible just after one hour (Chemat et al, 2001). The rate of removal of HS as TOC (Kim et al, 2007) was studied. These authors described the relationship between increased dose of H 2 O 2 and TOC removal rate.…”

Section: Combined Methodsmentioning

confidence: 99%

Supporting the process of removing humic substances on activated carbon.

Olesiak

Stępniak

2014

Acta Biochim Pol

View full text Add to dashboard Cite

This study is focused on biosorption process used in water treatment. The process has a number of advantages and a lot of research has been done into its intensification by means of ultrasonic modification of solutions. The study carried out by the authors leads to the conclusion that sonication of organic solutions allows for extension of the time of operation of carbon beds. For the analysis of the results obtained during the sorption of humic substances (HS) from the solution dependencies UV/UV₀ or DOC/DOC₀ were used. In comparative studies the effectiveness of sorption and sonosorption (UV/UV₀) shows that the share of ultrasounds (US) is beneficial for extension of time deposit, both at a flow rate HS solution equal to 1 m/h and 5 m/h. Analysis of the US impact sorption on HS sorption in a biological fluidized bed, both prepared from biopreparat and the activated sludge confirms the higher efficiency compared to sonobiosorption than biosorption. These results confirm the degree of reduction UV₂₅₄/UV₀ and DOC/DOC₀ for the same processes. EMS index also confirms the improvement of HSbiodegradation by sludge microorganisms.

show abstract

“…Ultrasonic algal control technology mainly utilizes mechanical effects which is the origin of cavitation buble. Cavitation bubbles produce in the negative phase amd rapidly crash in subsequent positive phase [5][6] . The range of ultrasonic frequency is from 20KHz to 2MHz.…”

Section: Effects Of Ultrasonic Irradiationmentioning

confidence: 99%

Algal Control by Low-Frequency, Low-Power Ultrasonic in Eutrophic Water Bodies

Jiang¹,

Ni²,

Zhang³

et al. 2012

AMR

View full text Add to dashboard Cite

Ultrasonic cavitations can control algal growth. Considering water ecosystem protection and characteristics of ultrasonic technology, low frequency and low power ultrasonic was especially suitable to control algal growth in water bodies. Effects of low-frequency and low-power ultrasonic irradiation on natural blend algal growth were investigated. The algae spices were collected from a fresh water body. It mainly consists of Cyanophyta, Bacillariophyta and Chlorophyta. The results showed that ultrasonic irradiation with frequency of 60KHz, power of 0.24W/cm2 and irradiation time of 1min, inhibited algal growth significantly. Inhibition of ultrasonic irradiation on algal growth enhanced with ultrasonic power increased. Inhibition did not increase again When ultrasonic power exceeds 0.24W/cm2. The effect of algal control was sustainable by ultrasonic irradiation with interval period of 2-4 days.

show abstract

TOC and THMFP reduction by ultrasonic irradiation in wastewater effluent

Cited by 18 publications

References 10 publications

Trihalomethanes in the drinking water of Concepción and Talcahuano, Chile

Trihalomethanes in the drinking water of Concepción and Talcahuano, Chile

Supporting the process of removing humic substances on activated carbon.

Algal Control by Low-Frequency, Low-Power Ultrasonic in Eutrophic Water Bodies

Contact Info

Product

Resources

About