Multipurpose plant systems for renovation of waste waters
Küçük Resim Yok
Tarih
2005
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Springer Heidelberg
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Two promising aquatic macrophytes Lemna minor (Duckweed) and Eichornia crassipes (Water Hyacinth); were used to test their cleaning ability for domestic waste waters in lagoons with one entry point and three outlets in 1996 (floatation rate 110 m(3)/day; BOD(5) 130-170 mg/l; pH 13.5). E. crassipes plants (5+ 5 roots, 25 cm long) were cultured in two lagoons and L. minor in one lagoon. Both species failed to grow due to a high pH. In 1997 the pH of water was neutralized to 6-7 before plant introduction in to the lagoons. L. minor plants did not grow due to overgrowth of rushes. However, E. crassipes grew very well and a total of 3 100 and 3400 roots were counted after 90 days with average heights of 70-75 cm, during this year. These plants showed high absorptive capacity. The dry weight of the harvested plants showed a parallelism to the prevalence with 80.160 kg dry weight. Phenological observations revealed that 80-90% of the plants covering the lagoon surface bloomed and water coming from the outlet became clear enough with a BOD(5) value of 30-40 and 50-80 mg/l. In a later experiment L. minor (20 plants) was cultured in a tank in May 2001 (BOD(5) 130, COD 170, suspended matter 35.2 mg/l). In all 1100 plants/m(2) were counted at the end of 90 days. After harvesting Lemna plants, water analysis showed that BOD(5) was 39.27, total nitrogen content 43, phosphorus 2, potassium 1.67, Pb 0.02, Cd 0.005, and Cr 0.05 mg/l. Renovated and non-renovated waters were used for irrigation of lawns covered by the grass species like Lolium perenne and L. italicum. These species behaved better when sprayed with 100% renovated water than mixed or non-renovated waters.
Açıklama
Anahtar Kelimeler
ecology, environmental pollution, Eichornia crassipes, Lemma minor, wastewater treatment
Kaynak
Arabian Journal For Science and Engineering
WoS Q Değeri
Q4
Scopus Q Değeri
N/A
Cilt
30
Sayı
2C
