College of Life Sciences, Fujian Normal University, Fuzhou 350117, China; Engineering Research Center of Industrial Microbiology of Ministry of Education, Fujian Normal University, Fuzhou 350117, China; Center of Fujian Modern Fermentation Technology and Engineering, Fuzhou 350117, China.
College of Life Sciences, Fujian Normal University, Fuzhou 350117, China; Fuzhou Clean Biotech Co., Ltd., Fuzhou 350117, China.
Bioresour Technol. 2016 Dec;222:130-138. doi: 10.1016/j.biortech.2016.09.128. Epub 2016 Oct 1.
This study aimed at improving the adaptability and biodegradability of tested microalgae in undiluted anaerobic fermentation slurry of piggery wastewater. For that, a two-stage method based on UV irradiation followed by gradual domestication was developed. The distinctness of this method was the elimination of a screening procedure and just needed the UV-irradiated cells with appropriate survival to be subjected to gradual domestication. The microalgae treated with the method not only grew well in undiluted slurry, but achieved outstanding removal efficiencies in total nitrogen (TN) and total phosphorus (TP). Large-scale application was conducted in an open raceway pond, and the concentrations of TN and TP after treatment were 43.80mg/L (removal rate of 89.5%) and 5.83mg/L (removal rate of 85.3%) respectively, which greatly excelled the Chinese discharge standards for livestock and poultry wastewater. The strategy is therefore a promising method for microalgae to purify piggery slurry containing high nutrient contents.
本研究旨在提高受试微藻在未经稀释的猪场废水厌氧发酵浆液中的适应性和可生物降解性。为此，开发了一种基于紫外线照射后逐步驯化的两阶段方法。该方法的特点是省去了筛选程序，只需用适当存活的紫外线照射细胞进行逐步驯化。用该方法处理的微藻不仅在未经稀释的浆液中生长良好，而且对总氮（TN）和总磷（TP）的去除效率也很高。该方法已在一个开放式跑道池塘中进行了大规模应用，处理后的 TN 和 TP 浓度分别为 43.80mg/L（去除率为 89.5%）和 5.83mg/L（去除率为 85.3%），大大优于中国畜禽废水排放标准。因此，该策略是一种有前途的利用微藻净化高营养含量猪场浆液的方法。
