Comparative Assessment of Sludge Pre-Treatment Techniques to Enhance Sludge Dewaterability and Biogas Production
Göster/ Aç
Erişim
info:eu-repo/semantics/closedAccessTarih
2018Yazar
Taş, Didem OkutmanYangın Gömeç, Çiğdem
Ölmez Hancı, Tuğba
Arıkan, Osman A.
Çifçi, Deniz İzlen
Gençsoy, Elif B.
Ubay Çokgör, Emine
Üst veri
Tüm öğe kaydını gösterÖzet
Effectiveness of ultrasonication, microwave technologies, and enzyme addition prior to anaerobic digestion is investigated using sludge samples taken from the secondary settling tank of a domestic wastewater treatment plant to improve methane production, enhance dewaterability characteristics of the sludge, and to reduce excess sludge. Microwave pre-treatment (1500 W, 10 min at 175 degrees C) results in better extra digester performance (compared to the control reactor) in terms of methane production (25 m(3) ton(-1) suspended solids (SS)) than ultrasound (no improvement) and enzyme pre-treatment (11 m(3) ton(-1) SS). While methane production is not improved as a result of ultrasonication pre-treatment (15 000 kJ kg(-1) SS), a noticeable increase (19%) is observed in the case of microwave pre-treatment. Higher compactibility values are obtained after ultrasonication and microwave application compared to the control (i.e., from 7.1 to 8.7 and 9.2%, respectively) before anaerobic digestion. Although ultrasonication and microwave application decrease the dewaterability of the raw sludge (capillary suction time (CST) from 827 to 1364 and 2290 s, respectively), similar dewaterability results are obtained at the end of the anaerobic digestion process for all pre-treated sludge samples. An economic assessment of this study shows that pretreatment with microwave results in more than 10-fold less net cost compared to the enzyme application.
Cilt
46Sayı
1Koleksiyonlar
İlgili Öğeler
Başlık, yazar, küratör ve konuya göre gösterilen ilgili öğeler.
-
A Review of Dehydration of Various Industrial Sludges
Tunçal, Tolga; Uslu, Orhan (Taylor & Francis Inc, 2014)Wastewater characteristics and sludge generation potential of point source categories are reviewed critically. Novel industry-specific sludge dewatering/drying solutions necessary to establish a sustainable model are ... -
Evaluation of the compost quality of vermicomposting process applied to different types of sludge using Eisenia fetida
Ekmekyapar, Füsun; Akyurt, Seyhan (Desalination Publ, 2019)This study was carried out in 3,000 g composting containers under open test conditions, sewage and industrial sludge incubated by soil worms (Eisenia fetida) and vermicompost produced. For this purpose; domestic and ... -
Removal of Octyl Phenol Ethoxylate (OPE) Using Processed and Unprocessed Industrial Biological Waste Sludge
Dinçer, Ali Rıza; Aral, İbrahim Feda (Polska Akad Nauk, Polish Acad Sciences, Inst Environ Eng Pas, 2021)This study investigated the Octyl Phenol Ethoxylate (OPE) removal potentials of raw and treated industrial treatment sludges (ITS) at different pH. Experiments were conducted in a set of 500 ml Erlenmeyer flasks, into which ...