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Afyonkarahisar Alkaloid Tesisinden Üretilen Atıksuyun Terbiyesine Hidrotermal Gazlaştırma Yönteminin Uygulanması

Application of a Hydrothermal Gasification Method in the Treatment of Wastewater Generated from the Afyonkarahisar- Alkaloid Plant

Journal Name:

  • Journal of The Turkish Chemical Society, Section B: Chemical Engineering

Publication Year:

  • 2016

Key Words:

Keywords (Original Language):

Author NameUniversity of Author
Abstract (2. Language): 
The wastewater coming from the alkaloid production plant, located in the province of Afyon, must satisfy the discharge limits specified in the “Water Pollution Control Regulations, 2004” to be safely discharged into the environment. Treatment of the alkaloid plant wastewater with the existing treatment method, which is a combination of the biological (aerobic / anaerobic) and chemical treatment, is not sufficient. In this study, hydrothermal gasification (or supercritical water gasification, SCWG) is proposed as an alternative and advanced treatment technique. The other objectives of the study are to show the producibility of methane and hydrogen as a renewable energy source and to investigate, as to what extent was the removal of chemical oxygen demand and polluting compounds as a spontaneous result of gasification. The effect of a catalyst in the highest conversion of an organic carbon content in wastewater, to a gaseous product rich in H2 and CH4, and the maximum efficiencies in total organic carbon (TOC) and chemical oxygen demand (COD) removals. Hydrothermal gasification studies of alkaloid wastewater were carried out without a catalyst and with Na2CO3 (N). The experiments were performed at the reaction temperatures of 400, 500, and 600 °C with and without 0.12 g of catalyst and 15 mL of wastewater. The gaseous products were analyzed using gas chromatography, and the TOC and COD content of the aqueous products and raw wastewater were analyzed using a TOC analyzer and COD analysis set. The variation of the product distribution and yields, TOC and COD removal by temperature and catalysis were examined. The initial TOC, and COD values of the wastewater studied were 15,000 mg/L and 35,000 mg/L, respectively.
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Abstract (Original Language): 
Afyon ilinde bulunan alkaloid üretim tesisinden gelen atıksu 2004 yılında yürürlüğe girmiş olan “Su Kirliliği Kontrol Yönetmeliği” kapsamında belirlenen deşarj sınırlamalarını karşılamalıdır. Biyolojik (aerobik / anaerobik) ve kimyasal terbiye yöntemlerinin bir karışımı olan mevcut terbiye yönteminde alkaloid tesisinin atıksuyunu terbiye etme yöntemi yeterli değildir. Bu çalışmada, hidrotermal gazlaştırma (ya da süperkritik su gazlaştırması, SCWG) bir alternatif ve ileri terbiye tekniği olarak önerilmektedir. Çalışmanın diğer amaçları, yenilenebilir bir enerji kaynağı olarak metan ve hidrojenin üretilebilirliğini göstermek ve gazlaştırmanın kendiliğinden olan bir sonucu olarak kirletici bileşiklerin ve kimyasal oksijen ihtiyacının ne kadar giderildiğini incelemektir. Atıksudaki organik karbon içeriğinin H2 ve CH4 açısından zengin gaz ürününe en yüksek mertebede dönüşümü için katalizör etkisi ve toplam organik karbon (TOC) ve kimyasal oksijen ihtiyacı (COD) giderimi için en yüksek etkinliklerin bulunması da amaçlanmıştır. Alkaloid atıksuyunun hidrotermal gazlaştırma çalışmaları katalizör olmadan ve katalizör olarak Na2CO3 (N) kullanarak yürütülmüştür. Deneyler 400, 500 ve 600 °C’de yürütülmüştür, katalizör kullanılacağı zaman, miktarı 0,12 g olarak belirlenmiştir ve atıksudan 15 mL alınmıştır. Gaz ürünler gaz kromatografisi ile analiz edilmiştir ve sulu ürünler ile ham atıksuyun TOC ile COD içeriği TOC analizörü ve COD analiz seti kullanılarak belirlenmiştir. Ürün dağılımı ve verimlerin değişmesi, sıcaklık ve katalizör ile TOC ve COD giderimi incelenmiştir. Atıksuya ait ilk TOC ve COD değerleri sırasıyla 15.000 mg/L ve 35.000 mg/L olarak bulunmuştur.
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