The Investigation of the Parameters Affecting the Solubility of Waste Activated Sludge in the Electro‑oxidation Process

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Erdem Yılmaz A., Kocadağıstan B., Arargüç E. C.

WATER, AIR AND SOIL POLLUTION : AN INTERNATIONAL JOURNAL OF ENVIRONMENTAL POLLUTION, cilt.233, ss.189-198, 2022 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 233
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1007/s11270-022-05665-y
  • Dergi Adı: WATER, AIR AND SOIL POLLUTION : AN INTERNATIONAL JOURNAL OF ENVIRONMENTAL POLLUTION
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, ABI/INFORM, Agricultural & Environmental Science Database, Aqualine, Aquatic Science & Fisheries Abstracts (ASFA), Artic & Antarctic Regions, BIOSIS, Biotechnology Research Abstracts, CAB Abstracts, Chemical Abstracts Core, Chimica, Compendex, EMBASE, Environment Index, Geobase, Greenfile, Pollution Abstracts, Veterinary Science Database, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.189-198
  • Anahtar Kelimeler: Waste activated sludge, Electro-oxidation, Current intensity, Initial pH, Removal, Pollutant, ANAEROBIC-DIGESTION, ELECTROCHEMICAL OXIDATION, ORGANIC POLLUTANTS, PILOT-SCALE, PRETREATMENT, WATER, ENHANCEMENT, REMOVAL
  • Atatürk Üniversitesi Adresli: Evet

Özet

Since the beginning of the last century, there has been a high demand for renewable energy sources due to the decrease in fossil-based energy sources and the intense pollution of these energy types. Bioenergy recovery from sludge biomass is an attractive renewable energy source. Electrochemical treatment is one of the investigated physicochemical methods to increase methane production from waste activated sludge (WAS) biomass. It can be used as a new and efficient pretreatment for the hydrolysis of WAS. In this study, electrochemical technology with platinum/titanium (Pt/Ti) mesh electrodes was first applied for WAS before aerobic digestion. The effects of various operating conditions such as current intensity and initial pH of the sludge were investigated. The study showed that the amount of soluble COD of WAS increased with increasing current intensity. In addition, the results obtained showed that pH values higher or lower than the pH value of WAS (6.2) are favorable for the degradation of organic substances. An approximately 358% increase in COD solubility was detected at the end of the reaction time of 30 min at a current intensity of 25 A. The conducted study showed that electrochemical pretreatment is feasible and that increasing the methane production rate for anaerobic digester-containing wastewater treatment plants in Turkey has the potential to provide environmental and economic benefits.