Daverio E
European Commission, JRC, IES, Inland and Marine Waters Unit, TP 300, 21020 Ispra, Varese, Italy.
Water Sci Technol. 2003;48(3):31-8.
A heat flux bench-scale calorimeter (Bio-RC1) has been used to assess the metabolic activity of microbial populations involved in wastewater treatment biological processes under aerobic, anoxic and anaerobic conditions. Under strictly aerobic conditions, a linear correlation was observed between oxygen uptake rate and heat flux for heterotrophic and nitrifying bacterial populations. Using the same calorimetric approach and the same apparatus, toxicity and biodegradability of a pesticides factory wastewater were investigated. The activity of heterotrophic and nitrifying aerobic communities was monitored considering both oxygen consumption and heat dissipation, whereas, under anoxic conditions, calorimetric data were compared to the traditional NUR (nitrate uptake rate) test. Heterotrophic activity was found to be 52% inhibited after toxic wastewater exposure under both aerobic and anoxic conditions and 30% inhibition was observed on autotrophic ammonia oxidation. Additionally, calorimetric measurements have been successfully applied to investigate anaerobic digestion. The thermal response of a mesophilic granular sludge to repetitive glucose pulses has been evaluated and a toxicity test has been performed by exposing the biomass to increasing concentrations of formaldehyde.
一台热通量台式量热仪（Bio-RC1）已被用于评估在好氧、缺氧和厌氧条件下参与废水处理生物过程的微生物种群的代谢活性。在严格好氧条件下，观察到异养和硝化细菌种群的氧气摄取率与热通量之间存在线性相关性。使用相同的量热方法和相同的仪器，研究了一家农药厂废水的毒性和生物降解性。考虑到氧气消耗和散热，监测了异养和好氧硝化群落的活性，而在缺氧条件下，将量热数据与传统的硝酸盐摄取率（NUR）测试进行了比较。发现在好氧和缺氧条件下接触有毒废水后，异养活性受到52%的抑制，自养氨氧化受到30%的抑制。此外，量热测量已成功应用于研究厌氧消化。评估了嗜温颗粒污泥对重复葡萄糖脉冲的热响应，并通过将生物质暴露于浓度不断增加的甲醛中来进行毒性测试。
