应用藻类的污染指数评价乌鲁木齐水体的水质

通过对乌鲁木齐地区几个水体中浮游植物的调查,根据浮游植物的群落结构、数量、优势种和污染指数来评价这些水体的水质。     

应用浮动生物滤清器除藻研究

根据浮游植物（藻类）与浮游动物（轮虫类）之间的生态食物链关系，Ｅｌｔｏｎａｉａｎ金字塔风言风语服动生物滤清器”（ＦＢＥ）、在该设备化虫（类）创造了一个生长、系列和栖息的地方，并让它澡类，应用该设备在不同地点进行了实际观测试验，其除藻效率达到８４％～９３％。     

混凝法在滇池蓝藻暴发期净水除藻的可行性研究

采用精制硫酸铝为混凝剂,L93^4正交法安排滇池蓝藻暴发期混凝沉降除藻除净水工艺实验。结果表明,混凝剂种类、水样pH值对蓝藻去除率有很大影响。研究确定了混凝剂除藻最佳操作条件,为混凝法去除蓝藻的工业化提供了理论和实际操作依据。     

优势除藻菌净化富营养化城市景观湖水初探

通过实验室小试和现场投加的方式 ,研究了优势除藻菌群对城市景观富营养化湖水中污染物的净化作用。结果证明 ,采用投加优势除藻菌的方法 ,能够有效地降低湖水中的叶绿素a(Chl.-a)和浊度 ,提高水体溶解氧 ,减少臭味 ,改善水质     

光强度对景观水体水质影响探讨

对景观水体来说,阳光会对水质产生一定的影响,而了解此影响的规律可以为更好的保持景观水质提供依据.在遮光和见光两种环境下对水体进行监测,发现光照首先体现在对藻类的影响上,而藻类的繁殖会对其他指标产生连锁反应,进而影响到整个水质情况.水体表面覆盖一定量的水生植物可以从遮光角度对水质的保持有所帮助.     

藻类吸附法去除废水中的重金属

介绍了藻类吸附法处理重金属废水的研究现状,讨论了不同藻类的预处理方法和吸附能力,总结了藻类吸附水中重金属的效果、影响因素、机理和规律,展望了藻类在重金属废水处理中的应用前景。     

Sludge-grown algae for culturing aquatic organisms: Part II. Sludge-grown algae as feeds for aquatic organisms

This project investigated the feasibility of using sewage sludge to culture microalgae (Chlorella-HKBU) and their subsequent usage as feeds for rearing different organisms. Part II of the project evaluated the results of applying the sludge-grown algae to feedOreochromis mossambicus (fish),Macrobrachium hainenese (shrimp), andMoina macrocopa (cladocera). In general, the yields of the cultivated organisms were unsatisfactory when they were fed the sludge-grown algae directly. The body weights ofO. mossambicus andM. macrocopa dropped 21% and 37%, respectively, although there was a slight increase (4.4%) inM. hainenese. However, when feeding the algal-fed cladocerans to fish and shrimp, the body weights of the fish and shrimp were increased 7% and 11% accordingly. Protein contents of the cultivated organisms were comparable to the control diet, although they contained a rather high amount of heavy metals. When comparing absolute heavy metal contents in the cultivated organisms, the following order was observed: alga > cladocera > shrimp, fish > sludge extracts. Bioelimination of heavy metals may account for the decreasing heavy metal concentrations in higher trophic organisms.     

Ultrasound pretreatment of filamentous algal biomass for enhanced biogas production

The filamentous alga Hydrodictyon reticulatum harvested from a bench-scale wastewater treatment pond was used to evaluate biogas production after ultrasound pretreatment. The effects of ultrasound pretreatment at a range of 10–5000 J/mL were tested with harvested H. reticulatum. Cell disruption by ultrasound was successful and showed a higher degree of disintegration at a higher applied energy. The range of 10–5000 J/mL ultrasound was able to disintegrated H. reticulatum and the soluble COD was increased from 250 mg/L to 1000 mg/L at 2500 J/mL. The disintegrated algal biomass was digested for biogas production in batch experiments. Both cumulative gas generation and volatile solids reduction data were obtained during the digestion. Cell disintegration due to ultrasound pretreatment increased the specific biogas production and degradation rates. Using the ultrasound approach, the specific methane production at a dose of 40 J/mL increased up to 384 mL/g-VS fed that was 2.3 times higher than the untreated sample. For disintegrated samples, the volatile solids reduction was greater with increased energy input, and the degradation increased slightly to 67% at a dose of 50 J/mL. The results also indicate that disintegration of the algal cells is the essential step for efficient anaerobic digestion of algal biomass.     

Bioavailability of wastewater derived dissolved organic nitrogen to green microalgae Selenastrum capricornutum, Chlamydomonas reinhardtii, and Chlorella vulgaris with/without presence of bacteria

Effluent dissolved organic nitrogen (DON) is problematic in nutrient sensitive surface waters and needs to be reduced to meet demanding total dissolved nitrogen discharge limits. Bioavailable DON (ABDON) is a portion of DON utilized by algae or algae + bacteria,while biodegradable DON (BDON) is a portion of DON decomposable by bacteria. ABDON and BDON in a two-stage trickling filter (TF) wastewater treatment plant was evaluated using three different microalgal species, Selenastrum capricornutum, Chlamydomonas reinhardtii and Chlorella vulgaris and mixed cultured bacteria. Results showed that up to 80% of DON was bioavailable to algae or algae + bacteria inoculum while up to 60% of DON was biodegradable in all the samples. Results showed that C. reinhardtii and C. vulgaris can be used as a test species the same as S. capricornutum since there were no significant differences among these three algae species based on their ability to remove nitrogen species.     

天然藻类吸附重金属的研究

传统的重金属废水处理技术存在耗能高、运行成本高及存在二次污染的问题等诸多劣势;而天然海藻由于其来源广、产量大,在处理重金属废水方面存在较多的优点。介绍了藻类处理重金属离子的研究背景、现状,阐述了藻类处理重金属的优点、机理,重点介绍了海藻处理废水过程中的各种影响因素,并对海藻处理废水的应用前景进行了展望。