Two-stage Microalgae Cultivation Using Diluted Effluent of Anaerobic Digestion to Remove Ammonia Nitrogen and Phosphorus
Microalgae can be used not only to produce many products for people, such as food, bio-oil,and health care products, but also to purify water by absorbing nutrients from the waterbody.In this study, two kinds of microalgae were used to clean ammonia nitrogen and phosphorus existing in wastewater through a two-stage cultivation process.In the first-stage cultivation,Chlorella vulgaris (C.vulgaris) was cultivated under a light intensity of 170 μmol m-2 s-1 and cycle of 12 h light and 12 h darkness in a diluted effluent from anaerobic digestion of poultry manure at 28℃.The C.vulgaris was then harvested by ultrafiltration (UF) membrane.In the second-stage cultivation, the water harvested from UF membrane was used to cultivate Spirulina platensis (S.platensis) by adding Zarrouk.With a small volume of algae broth, harvesting algae with membrane costs less energy, but with a large amount of microalgae loss.At a lower ammonia concentration (8-16 dilution ratio), S.platensis could grow well and remove ammonia completely.The two-stage cultivation of microalgae not only produced more algae biomass, but also reduced total phosphorus (TP) and total nitrogen (TN) in wastewater.
Microalgae harvest ultrafiltration membrane anaerobic digestion effluent nutrient removal C.vulgaris S.platensis
Xinfeng Wang Haifeng Lu Li Zhang Yu Zhao Baoming Li
Laboratory of Environment-Enhancing Energy (E2E), Key Laboratory of Agricultural Engineering in Stru Laboratory of Environment-Enhancing Energy (E2E), Key Laboratory of Agricultural Engineering in Stru
国际会议
The 2015 International Symposium on Animal Environment and Welfare(动物环境和福利国际研讨会)
重庆
英文
187-194
2015-10-23（万方平台首次上网日期，不代表论文的发表时间）