Biyobozunur plastiğin mineralizasyonuna evsel arıtma çamurunun etkisi
Year 2020,
Volume: 3 Issue: 2, 83 - 92, 29.12.2020
Nurgül Uzunboy
Cafer Türkmen
Abstract
Bu çalışma; Polilaktik asit bazlı biyobozunur bir plastik materyalin toprak ortamında bozunum sürecine kentsel arıtma çamurunun etkisini belirlemek amacıyla yürütülmüştür. Çalışmada; Arıtma çamurunun katı atıkların kontrolü yönetmeliğince izin verilen miktarı, bu miktarın yarısı ve iki katı, 1:1oranı (%50 toprak:%50 arıtma çamuru) ile arıtma çamuru uygulanmayan (kontrol) dozu olmak üzere beş doz belirlenmiş ve biyobozunur plastik levhalarla birlikte toprağa uygulanmıştır. Dört aylık inkübasyonun 15’er günlük periyotlarında örneklemeler yapılarak biyobozunur plastik levhalardaki kütle kayıpları belirlenmiş, alınan toprak örneklerinde amonyum (NH4+) ve nitrat (NO3¯ ), mikroorganizma sayıları, üreaz ve katalaz enzimi analizleri yapılmıştır.
Elde edilen verilere göre biyobozunur plastik levhalardaki kütle kaybı örnekleme zamanına ve çamur dozlarına göre önemli miktarlarda değişmiştir (p≤0.01). Son örnekleme zamanındaki “1:1” arıtma çamuru uygulanan biyobozunur plastik levhalardaki kütle kaybı en fazla olmuştur. Topraktaki mikroorganizma sayıları üzerine örnekleme zamanı ile arıtma çamuru dozlarının birlikte etkisi istatistiksel olarak önemli bulunmazken, faktörlerin bağımsız etkileri önemli bulunmuştur (p≤0.05). Arıtma çamurunun miktarı arttıkça mikroorganizma sayılarında artışlar gözlemlenmiştir. Toprak örneklerinde incelenen NH4+ ve NO3¯ miktarları ile üreaz ve katalaz enzim aktivitelerine uygulanan arıtma çamuru ve inkübasyon zamanının birlikte etkisi önemli olmuştur (p<0.05). Uygulanan çamur dozları arttıkça NH4+, NO3¯, üreaz ve katalaz enzim aktivitelerinde artış görülürken, inkübasyon zamanı ilerledikçe incelenen özelliklerin tümünde azalma görülmüştür. Bu inkübasyon çalışmasından elde edilen sonuçlara göre evsel atıksu arıtma çamurları ile biyobozunur plastikler birlikte depolanabilir. Bu işlem biyoplastiklerin geri kazanım sorunlarının giderimine kadar kentlerde düzenli katı atık deponi alanlarında uygulanabilir. Bu tür araştırmalar çeşitli organik atıklarla arazi şartlarındaki düzenli deponi alanlarında yapılmalı ve yaygınlaştırılmalıdır.
Supporting Institution
Bu çalışma Çanakkale Onsekiz Mart Üniversitesi, Bilimsel Araştırma Koordinasyon Birimi tarafından desteklenmiştir.
Project Number
FYL-2016-1052
Thanks
Bu araştırma; ÇOMÜ BAP Komisyonu Başkanlığı tarafından ÇÖMÜ FYL-2016-1052 No’lu Proje numarasıyla desteklenmiş olan ÇOMÜ Fen Bilimleri Enstitüsü Toprak Bilimi ve Bitki Besleme Anabilim Dalı Öğrencisi Nurgül Uzunboy’un "Arıtma Çamurunun Toprakta Biyobozunur Plastiğin Mineralizasyonu Üzerine Etkisinin Araştırılması” isimli Yüksek Lisans tez çalışmasından türetilmiştir. Teşekkür ederiz.
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The effect of sewage sludge of mineralization on biodegradable plastic
Year 2020,
Volume: 3 Issue: 2, 83 - 92, 29.12.2020
Nurgül Uzunboy
Cafer Türkmen
Abstract
This study aimed to determine the effects of municipal sewage sludge (MSS) on degradation of a polylactic acid-based biodegradable plastic material in soil environment. Five different doses of MSS were used as of allowed quantity by Solid Waste Control Regulations, half of this quantity, double of this quantity and 1:1 MSS:Soil mixture. A control without MSS was also used. These doses were applied to soils together with biodegredable plastic plates. Samples were taken in 15-day intervals throughout 4 months of incubation. Samples were weighed with an ultra prceise scale to get weight loss in biodegradable plastic plates. Ammonium (NH4+) and nitrate (NO3¯ ) contents, number of microorganisms and urease and catalase enzyme activity of the soil samples were also determined. Present findings revealed that mass loss of biodegradable plastic plates varied significantly with sampling time and MSS doses (p≤0.01). In the last sampling time, the greatest mass loss of biodegradable plastic plates was observed in 1:1 MSS:Soil treatment. While the interaction effects of sampling time and MSS doses on number of microorganisms were not found to be significant, separate effects of these parameters were found to be significant (p≤0.05). Number of microorganisms increased with increasing MSS doses. The interactive effects of MSS and incubation time on NH4 and NO3, urease and catalase enzyme activities were found to be significant (p<0.05). NH4, NO3, urease and catalase activity increased with increasing MSS doses and decreased with increasing incubation times. Present findings revealed that MSS and biodegradable plastics could be stored together. Such a process can be applied in regular solid waste repositories until the recovery (recycle) problems of the bioplastics are resolved. Further research is recommended to be conducted in municipal waste repositories under different organic waste conditions.
Project Number
FYL-2016-1052
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- Davis G, Song JH 2006. Biodegradable packaging based on raw materials from crops and their impact on waste management. Industrial crops and products, 23 (2): 147-161.
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- Filibeli A 1996. Arıtma Çamurlarının İşlenmesi. Dokuz Eylül Ü., Mühehdislik Fakültesi Yayınları No: 255, İzmir.
- Fisher KA, Yarwood SA, James BR 2017. Soil urease activity and bacterial ureC gene copy numbers: effect of pH. Geoderma, 285: 1-8.
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- Frankenberger Jr WT, Johanson JB, Nelson CO 1983. Urease activity in sewage sludge-amended soils. Soil Biology and Biochemistry, 15(5), 543-549.
- Gaspard P, Wiart J, Schwartzbrod J 1997. Parasitological contamination of urban sludge used for agricultural purposes, Waste Management and Research, 15: 429-436.
- Grewelling T, Peech M 1960. Chemical Soil Test. Cornel Univ. Agr. Exp. Sta. Bull. 960. Hand Book. 60. U.S. Dept. of Agriculture.
- Haktanır K, Arcak S 1997. Toprak Biyolojisi (Toprak Ekosistemine Giriş). Ankara Üniversitesi Yayınları: (1486), Ziraat Fak. Yayınları: (447), Ankara.
- Ho KLG, Pometto AL, Hinz PN 1999. Effects of temperature and relative humidity on polylactic acid plastic degradation. Journal of environmental polymer degradation, 7 (2): 83-92.
- Hoffmann GG, Teicher K 1961. Ein kolorimetrisches verfahren zur bestimmung der ureaseaktivität in Böden. Zeitschrift für Pflanzenernährung, Düngung, Bodenkunde, 95 (1): 55-63.
- ISO 17556 Plastics - Determination of the ultimate aerobic biodegradability of plastic materials in soil by measuring the oxygen demand in a respirometer or the amount of carbon dioxide evolved. Organization for Standardization (2012) Available at: www.iso.org (Erişim tarihi; 1 Şubat 2019).
- Jackson ML 1958. Soil Chemical Analysis. Prentice-Hall, Inc. Englewood Cliffs, New Jersey, USA.
- Kale G, Kijchavengkul T, Auras R, Rubino M, Selke SE, Singh SP 2007a. Compostability of bioplastic packaging materials: an overview. Macromolecular bioscience, 7 (3): 255-277.
- Kale G, Auras R, Singh SP 2007b. Comparison of the degradability of poly (lactide) packages in composting and ambient exposure conditions. Packag. Techn. Sci., 20: 49–70.
- Klute A 1986. Water Retention: Laboratory Methods. Methods of Soil Analysis Part1.2nd Ed. Agronomy 9. Am. Soc. Argon., 635-660, Madison, USA.
- Köksal Ö, Er BA, Ardalı Y, Sağlam M 2019. Biyoplastiklerin Biyodegradasyonu. Sinop Üniversitesi Fen Bilimleri Dergisi, 4(2), 151-167.
- Kravkaz-Kuscu IS, Cetin M, Yigit N, Savaci G, Sevik H 2018. Relationship between Enzyme Activity (Urease-Catalase) and Nutrient Element in Soil Use. Polish Journal of Environmental Studies, 27 (5).
- Liu J, Xie J, Chu Y, Sun C, Chen C, Wang Q 2008. Combined effect of cypermethrin and copper on catalase activity in soil. J. Soils Sediments, 8: 327-332.
- Lörcks J 1998. Properties and applications of compostable starch-basedplastic material. Polymer Degradation and Stability, 59 (1–3): 245–249.
- Luengo JM, Garciá B, Sandoval A, Naharro G, Olivera ER 2003. Bioplastics from microorganisms. Current Opinion in Microbiology, 6: 251–260.
- Ma X, Chang PR, Yu J, Stumborg M 2009. Properties of biodegradable citric acid modified granular starch/ thermoplastic pea starch composites, Carbohydrate Polymers, 75: 1–8.
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