Phycoremediation of Dairy Wastewater by Using Green Microlgae: <i>Botryococcus</i> Sp.

Abstract

Abstract. Dairy wastewater are usually much polluted due to the high level of nutrient content such as phosphate, nitrate, sulfate etc. The pollution level are indicated by few characteristics such as BOD (243 mg/L), COD (324 mg/L), pH (9.08), Total Nitrogen (65.06 mg/L), Total Organic Carbon (143.3 mg/L), Total Carbon (312.9 mg/L) and Inorganic Carbon (169.6 mg/L). In this study, Botryococcus sp., a species of green microalgae are used to determine whether it can purify dairy wastewater. In spite of that, the microalgae growth over phycoremediation process also determined daily based on hemocytometer counting. From 100% concentration of dairy wastewater, Botryococcus sp. was capable to reduce the parameters such as BOD of 73.3%, TOC of 65.1%, TC of 61.4%, IC of 58.3% and COD of 48.8% on the 15 days of phycoremediation. Meanwhile, for the 50% of dairy wastewater, the same microalgae be able to remove the parameter such as phosphate of 78.7%, BOD of 73.8%, TOC of 70%, TC of 68,8%, IC of 59.4% and COD of 50%. The overall result from this study shown that the Botryococcus sp. is useful to reduce the inorganic and organic pollutant in dairy wastewater and could be potential to be used for any different wastewater.

Effect of pH and alum dosage on the efficiency of microalgae harvesting via flocculation technique

“…As has already been investigated, microalgae growth rates are high compared to terrestrial plants. Also, their growth does not require a large land area (Gani et al 2015a;Yen et al 2014). Thereby, CO 2 fixation may be more effective to produce or accumulate sustainable biomass in massive quantities (Cheah et al 2014;Ramaraj et al 2015;Zhao et al 2015).…”

Lab-scale degradation of leather industry effluent and its reduction by Chlorella sp. SRD3 and Oscillatoria sp. SRD2: a bioremediation approach

“…had prevailed in the urban wastewater treatment study carried out by Orpez et al (2009) and in greywater as reported by Gokulan et al (2013). Gani et al (2015) employed phycoremediation for treatment of greywater and dairy wastewater using 1000 cells/ml as initial inoculum. Their results proved Botryococcus sp.…”

Extraction of hydrocarbons from freshwater green microalgae (Botryococcus sp.) biomass after phycoremediation of domestic wastewater

“…Not only reducing physiochemical and heavy metal parameters (Onalo et al 2014;Gani et al 2015c), microalgae also act as a great bio-agent to remove nitrogen and phosphorus (Sriram and Seenivasan, 2012). At the present works, the removal efficiency of TN in domestic wastewater is 59.9%, whereas the removal of phosphates is 36.8%.…”