Improving the Sludge Disintegration Efficiency of Sonication by Combining With Alkalization and Thermal Pre-Treatment Methods
Yükleniyor...
Dosyalar
Tarih
2012
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Iwa Publishing
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
One of the most serious problems encountered in biological wastewater treatment processes is the production of waste activated sludge (WAS). Sonication, which is an energy-intensive process, is the most powerful sludge pre-treatment method. Due to lack of information about the combined pretreatment methods of sonication, the combined pre-treatment methods were investigated and it was aimed to improve the disintegration efficiency of sonication by combining sonication with alkalization and thermal pre-treatment methods in this study. The process performances were evaluated based on the quantities of increases in soluble chemical oxygen demand (COD), protein and carbohydrate. The releases of soluble COD, carbohydrate and protein by the combined methods were higher than those by sonication, alkalization and thermal pre-treatment alone. Degrees of sludge disintegration in various options of sonication were in the following descending order: sono-alkalization > sonothermal pre-treatment > sonication. Therefore, it was determined that combining sonication with alkalization significantly improved the sludge disintegration and decreased the required energy to reach the same yield by sonication. In addition, effects on sludge settleability and dewaterability and kinetic mathematical modelling of pre-treatment performances of these methods were investigated. It was proven that the proposed model accurately predicted the efficiencies of ultrasonic pretreatment methods.
Açıklama
Anahtar Kelimeler
alkalization, combined pre-treatment, sludge disintegration, sonication, thermal pre-treatment, waste activated sludge
Kaynak
Water Science and Techonology
WoS Q Değeri
Q3
Scopus Q Değeri
Q2
Cilt
65
Sayı
10
Künye
Sahinkaya, S., Sevimli, M. F., Aygun, A., (2012). Improving the Sludge Disintegration Efficiency of Sonication by Combining With Alkalization and Thermal Pre-Treatment Methods. Water Science and Techology, 65(10), 1809-1816.
DOI: 10.2166/wst.2012.074
