Comparison between ozone and ultrasound disintegration on sludge anaerobic digestion

Braguglia, Camilla Maria; Gianico, Andrea; Mininni, Giuseppe

doi:10.1016/j.jenvman.2010.07.030

Cited by 93 publications

(53 citation statements)

References 20 publications

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“…Pretreatment, due to hydrolyze acceleration and increase of soluble organic fraction, makes sludge digestion happen better and sooner than a control reactor (Braguglia et al, 2012).…”

Section: Ultrasound Pretreatmentmentioning

confidence: 99%

“…It is thus essential to develop processes to reduce sludge quantity. One of the most interesting processes is anaerobic digestion (Kocyig and Ugurlu, 2015), which has widely been used to treat various industrial wastewaters for the stabilization of a large fraction of the organic matter entering the plant (Braguglia et al, 2012;Cesaro and Belgiorno, 2013;. The efficiency of anaerobic digestion can be greatly enhanced by using physical and/or chemical pretreatment processes improving the rate of hydrolysis steps (Braguglia et al, 2012;Cesaro and Belgiorno, 2013;.…”

Section: Introductionmentioning

confidence: 99%

“…One of the most interesting processes is anaerobic digestion (Kocyig and Ugurlu, 2015), which has widely been used to treat various industrial wastewaters for the stabilization of a large fraction of the organic matter entering the plant (Braguglia et al, 2012;Cesaro and Belgiorno, 2013;. The efficiency of anaerobic digestion can be greatly enhanced by using physical and/or chemical pretreatment processes improving the rate of hydrolysis steps (Braguglia et al, 2012;Cesaro and Belgiorno, 2013;. Recently, waste activated sludge (WAS) pretreatments like thermal, alkaline, ultrasonic, and ozone oxidation methods have been applied to improve hydrolysis and anaerobic digestion performance, and a range of acceptable results have been reported to date (Braguglia et al, 2012;Muz et al, 2014;Salsabil et al, 2010;Naddeo et al,2014).…”

Section: Introductionmentioning

confidence: 99%

“…The efficiency of anaerobic digestion can be greatly enhanced by using physical and/or chemical pretreatment processes improving the rate of hydrolysis steps (Braguglia et al, 2012;Cesaro and Belgiorno, 2013;. Recently, waste activated sludge (WAS) pretreatments like thermal, alkaline, ultrasonic, and ozone oxidation methods have been applied to improve hydrolysis and anaerobic digestion performance, and a range of acceptable results have been reported to date (Braguglia et al, 2012;Muz et al, 2014;Salsabil et al, 2010;Naddeo et al,2014). The term "ultrasonic" is generally taken to mean that the "frequency" of the wave is greater than the upper limit of human hearing (usually taken to be 20 kHz) (Erden et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

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Efficiency of integrated ultrasonic and anaerobic digestion of oil refinery wastewater sludge

2016

Issue 4

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The main effects of ultrasonic sludge are solubilization and release of organic components and biodegradability enhance of sludge by disrupting the physical, chemical and biological properties sludge. The objective of the current study was to determine the effect of ultrasound on anaerobic digestion of oil refinery sludge subjected to different pretreatments. A 300-ml anaerobic reactor was filled with 250 of the waste activated sludge and placed on a hot plate magnet for 41 d. A vibrato bath (40 kHz, 100W) was used in 30 min and 60 min and three cycles of 15 min. Mixed liquor suspended solids (MLSS)was ranged between 28100±282 and 12000±642 mg l -1 . The data were collected in a log phase condition. TSS, VSS, TCOD and BOD5 were measured following the standard methods. The combined reactor had the best performance in sludge digestion compared to anaerobic reactor with/ without ultrasonic pretreatment. Between two irradiation times (30 and 60 min) and the same situation, 60 min ultrasonic pretreatment was found to be more effective. Ultrasonic pretreatment accelerated the digestion process. In this project, oil refinery sludge with industrial feature attained to log phase after 41 days.

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“…Pretreatment, due to hydrolyze acceleration and increase of soluble organic fraction, makes sludge digestion happen better and sooner than a control reactor (Braguglia et al, 2012).…”

Section: Ultrasound Pretreatmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Efficiency of integrated ultrasonic and anaerobic digestion of oil refinery wastewater sludge

2016

Issue 4

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“…Erden ve arkadaşlarının 2010 yılında yaptığı çalışmada da CST değerlerine bağlı olarak ozon oksidasyonunun çamur filtrasyonu üzerinde önemli bir etkiye sahip olmadığı görülmüştür [5]. Braguglia ve arkadaşları (2012) ozonlamadan sonra CST değerlerinde hafif bir artış gözlemlemişlerdir [3].…”

Section: Ozonun Susuzlaştırma üZerindeki Etkisiunclassified

Sünger Filtre İle Çamur Yoğunlaştırmada Ozonun Etkisi ve Maliyet Analizi

GÖKYAY¹

2014

MJS

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ÖzetAtık sulardan kaynaklanan çamurların uzaklaştırılması atıksu mühendisliği sahasının en zor ve en pahalı problemi olmaya devam etmektedir. Atıksu arıtma tesisleri, kullanılan sisteme göre ön çöktürme çamuru, aktif çamur, kimyasal çamur veya anaerobik çamur gibi farklı çamurlar üretmektedir. Bu artık çamurlar, uzaklaştırılmadan önce hacimlerinin azaltılması ve stabilize hale getirilmesi gibi işlemlere tabi tutulmak zorundadırlar. Bunun için genellikle kullanılan yöntemler koşullandırmayla birleştirilmiş yoğunlaştırma ve susuzlaştırmadır.Çamur yoğunlaştırma ve susuzlaştırma ya büyük bir ilk yatırım ya da büyük bir yüzey alan gerektirmektedir. Bundan başka, mekanik ekipmanlar susuzlaştırma işleminden önce polimer takviyesine ihtiyaç duymaktadırlar. Kullanılan polimerlerin masrafı mekanik yoğunlaştırma ve susuzlaştırmayı ekonomik olmaktan uzaklaştırmaktadır.Bu çalışmada sünger filtre ile çamur yoğunlaştırma ve susuzlaştırmada ozonun etkisi araştırılmış, ayrıca maliyet analizi yapılmıştır. Polimer ilavesi ile daha yoğun ve daha susuz bir çamur elde etmek mümkündür ve bunun ilk yatırım maliyeti ozonlama sistemine göre daha düşüktür. Fakat ozonun benzer etkiyi gösterdiği anlaşılmış olup, 11 yıl sonra çamuru ozonlamanın daha ekonomik olacağı anlaşılmıştır.Anahtar Kelimeler: Çamur yoğunlaştırma, Sünger Filtre, Çamur Ozonlama, Çamur Susuzlaştırma, Ozonlama Maliyeti AbstractThe ultimate disposal of wastewater sludge (biosolids) continues to be one of the most difficult and expensive problems in the field of wastewater engineering. Wastewater treatment plants generate different sludges, like primary settled sludge, waste activated sludge, chemical sludge and anaerobic sludge, according to their operating systems. These excess sludges have to be managed by reducing their volume and stabilizing them before their ultimate disposal. Generally used volume reduction methods are thickening and dewatering that are usually coupled with conditioning.Sludge thickening and dewatering require either a big capital investment or a big surface area. Moreover, most of the mechanical dewatering technologies use polymers to condition the sludge before dewatering. These polymers have high cost rendering the mechanical dewatering uneconomical.It is possible to handle more thickened and dewatered sludge by adding polymer and initial cost of this system is lower than ozonation system. Howewer it was found that ozonation had same effect and it would be more economical than polymer system after 11 years.

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