EFFECT OF LIGHT ON EFFICIENCY TREATING NH4+ AND COD BY CHLORELLA SP AND SCENEDESMUS SP ALGAE

  • Phạm Thị Thanh Yên
  • Phạm Thị Mai Hương
  • Đỗ Thị Cẩm Vân
Keywords: Chlorella SP and Scenedesmus SP, ammoni, COD, heterotrophic

Abstract

Chlorella SP and Scenedesmus SP algae is a low-level plant that is capable of
generating biomass and high growth rates. In well-lit conditions, nitrogen is an
important macronutrients and necessary to create living organisms (including
amino acids and proteins) of algae. But in heterotrophic conditions, algae can still
use organic compounds as a source of nutrition. The results showed that the growth
of algae Chlorella SP and Scenedesmus SP reached the balance from the 12th day at
light intensity: 1200 Lux, 2400 Lux and 3000 Lux, the intensity of radiation
increases, so does the rate of algae growth; The concentrations of NH4+ - N <
200mg/l, COD < 1000mg/l does not significantly affect the treatment efficiency of
algae, but it is necessary to adjust the input concentration to achieve QCVN; The
removal rates of NH4+-N and COD with the ratio of light/dark were 24/0, 16/8,
12/12, 16/8: 88.9 - 93.7%, 84.5 - 92.1%, 78 , 5 - 85.2%, 64.8 - 75.9% (NH4+), 35.9 -
43.0%, 77.2 - 88.4%, 60.5 - 77.4%, 40.0 - 63.6% (COD) respectively. The
appropriate light/dark ratio for removal NH4+ and COD in wastewater is 16/8.

điểm /   đánh giá
Published
2021-06-18
Section
RESEARCH AND DEVELOPMENT