Reduction of Organic and Inorganic Pollutant from Waste Water by Algae

Abstract

Recently, algae have become significant organisms for biological purification of wastewater since they are able to accumulate plant nutrients, heavy metals, pesticides, organic and inorganic toxic substances and radioactive matters in their cells/bodies. Biological wastewater treatment systems with micro algae have particularly gained importance in last 50 years and it is now widely accepted that algal wastewater treatment systems are as effective as conventional treatment systems. These specific features have made algal wastewaters treatment systems an significant low-cost alternatives to complex expensive treatment systems particularly for purification of municipal wastewaters. By this method 70 % of biological oxygen demand, 66 % of chemical oxygen demand, 71 % total nitrogen, 67 % of phosphorus, 54 % volatile solid and 51 % of dissolved solid was reduced.

Effects of land use, topography, climate and socio-economic factors on geographical variation pattern of inland surface water quality in China

“…COD Mn is an indicative measure of oxidizable organic matter in surface water. In addition to human-introduced pollutants (e.g., organic fertilizers and pesticides), organic matter produced by photosynthesis in biological organisms is an important type of pollutant in surface water [29]. The rate and efficiency of photosynthesis are influenced by a wide range of variables, including water transparency, temperature and concentration of carbon dioxide, which may not be strongly correlated with human population density and GDP.…”

Application of microalgae cultivated on pine bark for the treatment of municipal wastewater in cylindrical photobioreactors

“…Algae growing in the biofilm can also use organic compounds containing nitrogen and phosphorus, leading a heterotrophic or mixotrophic lifestyle (Prajapati et al ., 2013; Sahu, 2014; Wang et al ., 2014; Luo et al, 2017). Organic forms of nitrogen and phosphorus can be entrapped in the structure of biofilm (a significant part of the TOC in the wastewater are solid particles with diameters of 1–100 µm (Huang et al ., 2010)) and then mineralized (Boelee et al ., 2011).…”

“…During photosynthesis, microalgae secrete O 2 used during the aerobic oxidation of organic compounds. In turn, due to oxidation of organic matter by heterotrophic bacteria, the CO 2 necessary for the growth of algae biomass is formed (Rawat et al ., 2011; Boelee et al ., 2012; Prajapati et al ., 2013; Sahu, 2014; de Assis et al ., 2017). Algal‐bacterial consortium is efficient in the removal of nitrogen and phosphorus from municipal sewage (Wang et al ., 2014).…”

Water Pollution from the Activity of Large-Ruminant Animal Quarantine Installation (AQI) in Its Receiving Water Body

“…The under standard qualities of BOD and COD were caused by the organic material on storage pond with a swamp-like design was absorbed by the water plants. According to Abdel-Raouf et al (2012) and Sahu (2014), water plants were able to largely absorb the inorganic material, specially P and N as was shown in the reduction of BOD and COD at the point location far from the wastewater input.…”