Krustok I, Diaz J G, Odlare M, Nehrenheim E
School of Business, Society and Engineering, Mälardalen University, PO Box 883, SE-721 23 Västerås, Sweden E-mail:
Faculty of Science, Universidad Autónoma de Madrid, Ciudad Universitaria de Cantoblanco, 28049 Madrid, Spain.
Water Sci Technol. 2015;72(10):1723-9. doi: 10.2166/wst.2015.384.
Because microalgae are known for quick biomass growth and nutrient uptake, there has been much interest in their use in research on wastewater treatment methods. While many studies have concentrated on the algal treatment of wastewaters with low to medium ammonium concentrations, there are several liquid waste streams with high ammonium concentrations that microalgae could potentially treat. The aim of this paper was to test ammonium tolerance of the indigenous algae community of Lake Mälaren and to use this mixed consortia of algae to remove nutrients from biogas digestate. Algae from Lake Mälaren were cultivated in Jaworski's Medium containing a range of ammonium concentrations and the resulting algal growth was determined. The algae were able to grow at NH4-N concentrations of up to 200 mg L(-1) after which there was significant inhibition. To test the effectiveness of the lake water algae on the treatment of biogas digestate, different pre-cultivation set-ups and biogas digestate concentrations were tested. It was determined that mixing pre-cultivated suspension algae with 25% of biogas digestate by volume, resulting in an ammonium concentration of around 300 mg L(-1), produced the highest algal growth. The algae were effective in removing 72.8±2.2% of NH4-N and 41.4±41.4% of PO4-P.
由于微藻以生物量快速增长和养分吸收而闻名，因此人们对其在废水处理方法研究中的应用兴趣浓厚。虽然许多研究集中在低至中等铵浓度废水的藻类处理上，但仍有几种高铵浓度的废液流微藻可能有潜力处理。本文的目的是测试梅拉伦湖本地藻类群落对铵的耐受性，并利用这种藻类混合菌群从沼气消化液中去除养分。将来自梅拉伦湖的藻类在含有一系列铵浓度的雅沃尔斯基培养基中培养，并测定由此产生的藻类生长情况。藻类能够在高达200 mg L(-1)的NH4-N浓度下生长，在此之后生长受到显著抑制。为了测试湖水藻类对沼气消化液处理的有效性，对不同的预培养设置和沼气消化液浓度进行了测试。结果确定，将预培养的悬浮藻类与25%体积的沼气消化液混合，使铵浓度达到约300 mg L(-1)时，藻类生长最高。藻类有效地去除了72.8±
