Biomass Production of Marine Microalgae as Feedstock for Bioenergy in Synthetic Urea Wastewatere Just Try to Submit This Sample Abstract
Gusti Diansyah (a,b*) Riris Aryawati (a), M. Akbar Rahman (c), Lisya Meidina (a), Karin Miranda Pasya (a), Tengku Zia Ulqodry (a)

a)Department of Marine Science, Faculty of Mathematics and Natural Sciences, Universitas Sriwijaya, Ogan Ilir 30662, South Sumatra, Indonesia
*gusti.diansyah[at]unsri.ac.id
b)Doctoral Program of Environmental Science, Graduate Program, Universitas Sriwijaya, Palembang 30139, South Sumatra, Indonesia
c)Environmental Management Study Program, Graduate Program, Universitas Sriwijaya, Palembang 30139, South Sumatra, Indonesia

Abstract

Agricultural and industrial activities have contributed to urea effluent emissions that potentially cause pollution of the marine environment. This study focused on the growth rate of marine microalgae (Porphyridium sp., Nannochloropsis oculata, and Tetraselmis chuii) in utilising urea wastewater as nutrients as well as a bioremediation agent for nitrogen waste reduction. Microalgae were cultivated in a controlled environment with varying concentrations of urea wastewater. The urea concentrations used were 25, 50, 75, 100, 150 ppm and 0 ppm as control variables. Environmental parameters such as pH, temperature, dissolved oxygen (DO) and salinity were also monitored during the experiment. The results showed that the microalgae cell growth rate of Nannochloropsis oculata was 0.45 cells/mL/day. While Porphyridium sp. and Tetraselmis chuii were found to be 0.61 cells/mL/day and 0.56 cells/mL/day. The optimum biomass productivity of microalgae Nannochloropsis oculata, Porphyridium sp. and Tetraselmis chuii was found to be 422.4 gr/m3 per day, 940 gr/m3 per day, and 829.6 gr/m3 per day, respectively. The use of microalgae is a sustainable solution to the negative impact of urea that pollutes marine waters.

Keywords: Biomass, Microalgae, Growth rate, Urea

Topic: Biology and Applied Biology