厌氧处理的屠宰场废水含有丰富的营养物质,有机物,如果未经适当的进一步处理而排放到环境中,会导致富营养化。此外,农产品加工业废水中的磷和氮主要在三级处理阶段被去除。本研究的目的是评估小球藻和栅藻物种的污染物去除效率以及它们的共培养处理通过微藻生物质生产的两相厌氧消化器废水。用于进行实验的矩形光生物反应器的尺寸为15厘米高,宽度20厘米,和30厘米的长度。去除效率在86.74-93.11%之间,96.74-97.47%,91.49-92.91%,97.94-99.46%,89.22-94.28%,化学需氧量达到91.08-95.31%,总氮,硝酸盐,铵,总磷,和小球藻物种的正磷酸盐,景物物种,和他们的共同文化,分别。小球藻物种的平均生物量生产率和生物量产量,景物物种,它们的共培养分别为1.4±0.1、1.17±0.12、1.5±0.13g/L,和0.18、0.21和0.23g/L*天,分别。化学需氧量方面的最终出水水质,总氮,小球藻物种和共培养物获得的总磷低于该国(埃塞俄比亚)屠宰场废水标准的允许排放限值。研究结果表明,使用微藻及其共培养来抛光厌氧处理的农业加工工业废水中的养分和残留有机物,为废水修复和生物质生产提供了有希望的结果。总的来说,小球藻和Scenedesmus物种微藻及其共培养物可以用作从厌氧处理的屠宰场废水中去除养分以及可用于生物能源的生物质生产的替代方法。
Anaerobically treated slaughterhouse effluent is rich in nutrients, organic matter, and cause eutrophication if discharged to the environment without proper further treatment. Moreover, phosphorus and nitrogen in agro-processing industry wastewaters are mainly removed in the tertiary treatment phase. The objective of this study is to evaluate the pollutant removal efficiency of Chlorella and Scenedesmus species as well as their co-culture treating two-phase anaerobic digester effluent through microalgae biomass production. The dimensions of the rectangular
photobioreactor used to conduct the experiment are 15 cm in height, 20 cm in width, and 30 cm in length. Removal efficiencies between 86.74-93.11%, 96.74-97.47%, 91.49-92.91%, 97.94-99.46%, 89.22-94.28%, and 91.08-95.31% were attained for chemical oxygen demand, total nitrogen, nitrate, ammonium, total phosphorous, and orthophosphate by Chlorella species, Scenedesmus species, and their co-culture, respectively. The average biomass productivity and biomass yield of Chlorella species, Scenedesmus species, and their co-culture were 1.4 ± 0.1, 1.17 ± 0.12, 1.5 ± 0.13 g/L, and 0.18, 0.21, and 0.23 g/L*day, respectively. The final effluent quality in terms of chemical oxygen demand, total nitrogen, and total phosphorous attained by Chlorella species and the co-culture were below the permissible discharge limit for slaughterhouse effluent standards in the country (Ethiopia). The results of the study showed that the use of microalgae as well as their co-culture for polishing the nutrients and residual organic matter in the anaerobically treated agro-processing industry effluent offers a promising result for wastewater remediation and biomass production. In general, Chlorella and Scenedesmus species microalgae and their co-culture can be applied as an alternative for nutrient removal from anaerobically treated slaughterhouse wastewater as well as biomass production that can be used for bioenergy.