A newly isolated microalgal strain, Desmodesmus sp. PW1, possessing not only high potential for removing nitrogen and phosphorous from piggery wastewater but excellent self-flocculating ability, was provided here. Strain PW1 grew well in diluted and undiluted piggery wastewater, and could effectively remove total nitrogen and total phosphorus with removal rates up to 90% and 70%, respectively. In the laboratory scale by 30-L photobioreactor, microalga also performed well in TN (65.3%) and TP (83.5%) removal. Strain PW1 cultivated in the stationary phase achieved high self-flocculating efficiency (>90%) in 2.5 h of settling; meanwhile, temperature and pH slightly influenced on the flocculation. The potential mechanism on self-flocculation was considered related to hydrophobic extracellular polymeric substances. Furthermore, the fatty acid compositions of PW1 were mainly hexadecanoic acid, oleic acid and linoleic acid. Taken together, Desmodesmus sp. PW1 was the promising candidate to overcome the microalgae harvesting problem in piggery wastewater treatment.

中文翻译：

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通过新分离的自絮凝微藻Desmodesmus sp从养猪废水中去除营养物并产生脂质。PW1。

新分离的微藻菌株Desmodesmus sp。这里提供的PW1不仅具有从猪场废水中去除氮和磷的高潜力，而且具有出色的自絮凝能力。PW1菌株在稀释和未稀释的养猪废水中生长良好，可以有效去除总氮和总磷，去除率分别高达90％和70％。在实验室规模的30升光生物反应器中，微藻类在TN（65.3％）和TP（83.5％）去除方面也表现良好。固定相中培养的PW1菌株在沉降2.5小时后达到了很高的自絮凝效率（> 90％）；同时，温度和pH值对絮凝影响很小。自絮凝的潜在机制被认为与疏水性细胞外聚合物有关。此外，PW1的脂肪酸组成主要是十六烷酸，油酸和亚油酸。两者合计，Desmodesmus sp。PW1是克服猪场废水处理中微藻收获问题的有希望的候选者。