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AÇIK VE KAPALI ÇAMUR KURUTMA YATAKLARINDAKİ TOPLAM KOLİFORM VE HETEROTROFİK BAKTERİ SAYILARININ DEĞİŞİMİ

Variation of Total Coliform and Heterotrophic Bacteria Numbers in Open and Covered Sludge Drying Beds

Journal Name:

  • Uludağ Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

Publication Year:

  • 2008

Key Words:

Keywords (Original Language):

Author NameUniversity of AuthorFaculty of Author
Abstract (2. Language): 
In this study, wastewater sludges were dried in open and covered sludge drying beds and the variations of total coliform and heterotrophic bacteria numbers in sludges were monitored during three different drying periods. Compared to similar solar drying systems, the covered sludge drying bed employed in this study presented diversity with respect to flat plate solar collectors which heated the impermeable concrete floor and the axial fans which recycled warm indoor air back to the rock bed. The results of the study indicated that drying and microbial removal efficiency in open sludge drying beds directly depend on climatic conditions. After the heavy rainfall events microbial regrowth was observed in open sludge drying beds and increased moisture level introduced an increment of 1-1,5 log bacteria. On the other hand, the sludge from covered drying bed produced more consistent results with respect to dry solids and bacterial content. The dry solid contents in sludges from the covered system were all above the value of 85% in all drying periods. The removal of total coliform and heterotrophic bacteria were 2,27 to 3,68 log and 1,45 to 2,80 log, respectively.
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Abstract (Original Language): 
Bu arastırmada arıtma çamurları açık ve kapalı çamur kurutma yataklarında kurutulmus ve çamurdaki toplam koliform ve heterotrofik bakteri sayılarının 3 farklı kuruma dönemi süresince gösterdiği değisim izlenmistir. Çalısmada kullanılan kapalı solar kurutma yatağı, geçirimsiz beton zeminin günes enerjisi kolektörleriyle ısıtılması ve içteki sıcak havayı tas yatağa geri döndüren aksiyal fanların kullanılması bakımından benzer sistemlerden farklılık göstermektedir. Çalısma sonuçları açık çamur kurutma yataklarında kuruma ve mikrobiyal giderim veriminin doğrudan iklim kosullarına bağlı olduğunu göstermistir. Kuvvetli yağısların ardından açık sistemdeki çamurlarda mikrobiyal yeniden çoğalma gözlenmis ve artan nem seviyesi bakteri sayılarını 1 ila 1,5 log arttırmıstır. Diğer taraftan, kapalı kurutma yataklarındaki çamurlar hem katı madde hem de bakteri içeriği açısından daha tutarlı sonuçlar vermistir. Kapalı sistemdeki katı madde oranları tüm kurutma dönemlerinde % 85’in üzerine çıkmıstır. Toplam koliform ve heterotrofik bakteri giderimleri sırasıyla 2,27 ila 3,68 log ve 1,45 ila 2,80 log olarak bulunmustur.
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  • 2
111-117
  • Turkish

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