Buradasınız

SON ÇÖKELTME HAVUZLARINDA SU MERCİMEĞİNİN (LEMNA MINOR L.) ROLÜ

THE ROLE OF DUCKWEED (LEMNA MINOR L.) IN SECONDARY CLARIFIER TANKS

Journal Name:

Publication Year:

Keywords (Original Language):

Abstract (2. Language): 
In this study, the effects of duckweed (Lemna minor L.) presence on the effluent water quality and settling characteristics in the secondary clarifier tank of a conventional biological treatment plant were investigated. For this purpose, the performances of the secondary clarifier with and without duckweed were compared. In the secondary clarifier tank with duckweed, COD, BOD5, ammonium and phosphate removal efficiencies were higher by 15, 25, 35 and 45%, respectively. SS concentration of effluent and values of sludge volume index (SVI) were the same. The results showed that duckweed contributes to treatment efficiency of conventional biological treatment plant, which reduces the need of tertiary nutrients removal.
Abstract (Original Language): 
Bu çalışmada, bir klasik biyolojik atıksu arıtma tesisinin son çökeltme havuzunda oluşan su mercimeğinin çıkış suyu kalitesine ve çökelme karakteristiğine olan etkisi araştırılmıştır. Bu amaçla, su mercimeği bulunan son çökeltme havuzuyla su mercimeği bulunmayan son çökeltme havuzu karşılaştırılmıştır. Su mercimeği bulunan son çökeltme havuzunda; KOİ giderme verimi % 15, BOİ5 giderme verimi % 25, amonyum giderme verimi % 35 ve fosfat giderme verimi % 45 daha yüksek bulunmuştur. Çıkış suyunun askıda katı maddesi ve çamur hacim indeksi (SVI) değerleri bakımından bir farklılık gözlenmemiştir. Bu sonuçlar, son çökeltme havuzunda oluşan su mercimeğinin arıtma verimini artıracağını ve üçüncül nutrient giderimi ihtiyacını azaltacağını göstermektedir.
28 - 31

REFERENCES

References: 

1.
DALU, J. M., NDAMBA, J. “Duckweed based wastewater stabilization ponds for wastewater treatment (a low cost technology for small urban areas in Zimbabwe)”, Phys. and Chemist. of the Earth Parts A/B/C, 28 (20-27), 1147-1160, 2003.
2.
MONETTE, F., LASFAR, S., MILLETTE, L., AZZOUZ, A. “Comprehensive modelling of mat density effect duckweed (Lemna minor) growth under controlled eutrophication”, Wat. Res., 40, 2901-2910, 2006.
3.
UYSAL, Y., ZEREN, O. “Removal efficiencies of nutrients from wastewater treated with duckweed (Lemna minor L.)”, Fresen. Environ. Bull., 13 (10), 1016-1019, 2004.
4.
LASFAR, S., MONETTE, F., MILLETTE, L., AZZOUZ, A. “Intrinsic growth rate: A new approach to evaluate the effects of temperature, photoperiod and phosphorus-nitrogen concentrations on duckweed growth under controlled eutrophication”, Wat. Res., 41 (11), 2333-2340, 2007.
5.
SKILLICORN, P., SPIRA, W. AND JOURNEY, W. “Duckweed aquaculture- a new aquatic farming system for developing countries”, The World Bank. Washington, D.C. 76s., 1993.
6.
RAN, N., AGAMİ, M., ORON, G. “A pilot study of constructed wetlands using duckweed (Lemna gibba L.) for treatment of domestic primary effluent in Israel”, Wat. Res., 38, 2241-2248, 2004.
7.
BONOMO, L., PASTORELLI, G., ZAMBON, N. “Advantages and limitations of duckweed-based wastewater treatment systems”, Wat. Sci. Technol., 35 (5), 239-246, 1997.
8.
RANDALL, C.W., STENSEL, H.D., BARNARD, J.L. “Design of Activated Sludge Biological Nutrient Removal Plants, in Design and Retrofit of Wastewater Treatment Plants for Biological Nutrient Removal”, Vol.5, Techomic Publishing Co. Inc., Lancaster, PA, 419, 1992.
9.
CHENG, J., BERGMANN, B.A., CLASSEN, J.J. STOMP, A.M., HOWARD, J.W. “Nutrient recovery from swine lagoon water by Spirodela punctata”, Biores. Tech., 81, 81-85, 2002.
10.
KÖRNER, S., LYATUU, G.B., VERMAAT, J.E. “The influence of Lemna gibba L. on the degradation of organic material in duckweed-covered domestic wastewater”, Wat. Res., 32 (10), 3092-3098, 1998.
11.
AL-NOZALY, F., ALAERTS, G., VEENSTRA, S. “Performance of duckweed-covered sewage lagoons-II. Nitrogen and phosphorus balance and plant productivity”, Wat. Res., 34 (10), 2734-2741, 2000.
12.
APHA, AWWA, WCPF. “Standard Methods for the Examination of Water and Wastewater”, 20th Edition, American Public Health Association, Washington, D.C., 1998.
13.
ALAERTS, G.J., MAHBUBAR, M.R., KELDERMAN, P. “Performance of a full-scale duckweed-covered sewage lagoon”, Wat.Res., 30 (4), 843-852, 1996.
14.
VERMAAT J.E., HANİF, M.K. “Performance of common duckweed species (Lemnaceae) and the waterfern Azolla Filiculoides on different types of wastewater”, Wat. Res., 32 (9), 2569-2576, 1998.
15.
KÖRNER, S., VERMAAT, J.E. “The relative importance of Lemna gibba L., bacteria and algae for the nitrogen and phosphorus removal in duckweed-covered domestic wastewater”, Wat. Res., 32 (12), 3651-3661, 1998.
16.
KRİSHNA, K.C.B., POLPRASERT, C. “An integrated kinetic model for organic and nutrient removal by duckweed-based wastewater treatment (DUBWAT) system”, Ecol. Eng., 34 (3), 243-250, 2008.
17.
ZİMMO, O.R., Al-SA’ED, R.M., VAN DER STEEN, N.P., GİJZEN, H.J. “Process performance assessment of algae-based and duckweed-based wastewater treatment systems”, Wat. Sci. Technol., 45 (1), 91-101, 2002.

Thank you for copying data from http://www.arastirmax.com