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- Title
THE ROLE OF AQUATIC PLANTS AND MICROORGANISMS IN DOMESTIC WASTEWATER TREATMENT.
- Authors
Nguyen Thi Loan; Nguyen Minh Phuong; Nguyen Thi Nguyet Anh
- Abstract
This study aimed to assess the ability of microorganism populations and two aquatic plant species (water hyacinth - Eichhornia crassipes Solms and water morning glory - Ipomoea aquatica) to treat domestic wastewater in Nhue Giang pond, Tay Mo village, Tu Liem District, Hanoi City in Vietnam. The results showed that microorganism populations in the pond water contained all of groups of microorganisms including bacteria, Actinomycetes, mold and yeast. In water inlet and outlet samples, bacteria has the largest number in population (2.1x106 and 8.7x105 CFU/mL at inlet and outlet), accounting for 99.91% of total microorganisms. Regarding the number of microorganisms attached on roots of aquatic plants, the highest number was recorded for bacteria, while the numbers of Actinomycetes, mold and yeast were quite small. The total number of microorganisms attached on water hyacinth roots is 2.5x106 CFU/g and 1.5x106 CFU/g (at inlet and outlet sample) higher than that on water morning glory roots in both sampling sites. The wastewater treatment efficiency for TSS, COD, NH4+ and PO43- parameters at the site without aquatic plants was in the range of 1% to 5% only, while treatment efficiency for those parameters at location with aquatic plants was much higher. Particularly, it was in range of 37.8% - 53.3% for TSS; 44.4% - 53.4% for COD; 56.7% - 61.4% for PO4+ and 26.8% - 32.6% for NH4+. All the lower values belonged to water morning glory sample and the higher values belonged to water hyacinth sample at the outlet.
- Subjects
WASTEWATER treatment; AQUATIC plants; WATER hyacinth; IPOMOEA aquatica; WATER pollution
- Publication
Environmental Engineering & Management Journal (EEMJ), 2014, Vol 13, Issue 8, p2031
- ISSN
1582-9596
- Publication type
Article
- DOI
10.30638/eemj.2014.225