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Reaktörde Kompostlaştırma: II. Çim Kırpıntıları

IN-VESSEL COMPOSTING: II. GRASS CLIPPINGS

Journal Name:

  • Uludağ Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

Publication Year:

  • 2009

Key Words:

Keywords (Original Language):

Author NameUniversity of AuthorFaculty of Author
Abstract (2. Language): 
In the present study, in-vessel aerobic composting was evaluated in terms of impact on stabilization of grass clippings (GC). The composting period was 22 days. The temperature, carbon (C), total Kjeldahl nitrogen (TKN), C/N ratio, cellulose, volatile solids (VS), moisture, pH, electrical conductivity (EC), total coliform (TC), fecal coliform (FC), heavy metals and radioactivity were investigated and the kinetics of degradation of organic matter was found during composting. The reaction rate constant of degradation of VS was found as 0.0372 day- 1(R2 = 0.99). The VS decreased from 88.78 % to 83.51 % at the end of the process. The GC reached maximum temperature of 62°C within 1 day. C decreased from 49.32 % to 46.39 % while TKN decreased from 2.94 to 2.69 %. C/N ratio that was 16.78 at the beginning increased to 17.25. Cellulose increased after 22 days. pH increased from 5.97 to 8.26 and EC decreased from 1006 to 942 S/cm. Coliforms decreased during composting. The obtained composts contained heavy metals under the standards related to heavy metal. At the end of the composting process α-radioactivity greatly decreased and also the β-radioactivity decreased. 40K and 137Cs concentrations were also determined. In-vessel aerobic composting was effective to reduce TC, FC, α-and β- radioactivity in GC used. According to these parameters, if such composts are used in soil, a risk for human health could not arise.
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Abstract (Original Language): 
Mevcut çalışmada reaktörde aerobik kompostlaştırma, çim kırpıntılarının stabilizasyonu üzerine olan etkisi bakımından değerlendirilmiştir. Kompostlaştırma süresi 22 gün olmuştur. Kompostlaştırma süresince sıcaklık, karbon (C), toplam Kjeldahl azotu (TKN), C/N oranı, selüloz, uçucu katı, nem, pH, elektriksel iletkenlik, toplam koliform (TC), fekal koliform (FC), ağır metaller ve radyoaktivite araştırılmış ve organik madde bozunmasının kinetikleri bulunmuştur. Uçucu katı bozunmasının reaksiyon hız sabiti 0.0372 gün-1 (R2 = 0.99) olarak bulunmuştur. Uçucu katı, proses sonunda % 88.78’ den % 83.51’e azalmıştır. Çim kırpıntıları 1 gün içerisinde 62°C’lik en yüksek sıcaklığa ulaşmıştır. TKN % 2.94’den % 2.69’a azalırken karbon % 49.32’den % 46.39’a azalmıştır. Başlangıçta 16.78 olan C/N oranı 17.25’e artmıştır. Selüloz 22 gün sonra artmıştır. pH 5.97’den 8.26’ya artmış ve elektriksel iletkenlik 1006’dan 942 S/cm’e azalmıştır. Kompostlaştırma esnasında koliformlar azalmıştır. Elde edilen kompostlar ağır metal ile ilişkili standartların altında ağır metal içermişlerdir. Kompostlaştırma prosesinin sonunda α-radioaktivitesi büyük oranda azalmıştır ve β-radioaktivitesi de azalmıştır. 40K ve 137Cs konsantrasyonları da tespit edilmiştir. Reaktörde aerobik kompostlaştırma, kullanılan çim kırpıntılarındaki TC, FC, α ve β-radioaktivitelerini azaltmada etkili olmuştur. Bu parametrelere göre böyle kompostların toprakta kullanılması durumunda insan sağlığına bir risk oluşturmayacaktır.
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  • 2
47-56
  • English

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