生物反硝化除磷技术及其研究进展

污水生物反硝化除磷技术的研究在国内才刚刚起步，而在国外尤其在欧洲已经是一个新热点。该文在相关文献的基础之上，针对反硝化除磷技术的机理、工艺及其研究进展，作了综述和比较分析，以给相关的研究工作者提供一些有价值的参考和帮助。     

印染废水治理研究

本文介绍了用生物接触氧化法治理南充地区印染厂废水试验工艺条件选择，研究了有机负荷、水力负荷和温度对废水处理效果的影响，并观察了微生物的生长和发展规律。试验证明，本法能有效的处理印染废水，在适宜条件下，COD和色度的去除率分别为74．4％、92．0％，而后再经混凝处理可使二沉池出水COD去除率高达88～90％、色度为0、pH在7～8。     

生物脱臭技术初探

通过以Ｈ２Ｓ为代表的恶臭气体和以活性污泥加热干燥产气对象的脱臭实验，对生物法脱臭机理及影响生物脱臭效果的一些因素进行了有益的研究。     

Use of sequential sampling of amphipod abundance to classify the biotic integrity of acid-sensitive lakes

A sequential sampling program using previously published zoobenthos data is described for ubiquitous, cost-effective biomonitoring of the effects of lake acidification. Spring densities of the littoral amphipodHyalella azteca are quantitatively sorted into five abundance catagories. An essential step in the a priori definition of decision criteria is the stratification of proportional densities per unit macrophyte biomass in relation to aqueous total phosphorus concentrations. Density rankings were related to lake acidity and to detailed lake-specific information on patterns ofHyalella life history and acid tolerance. Incorporation ofHyalella abundance as a potential metric for the assessment of the biological integrity of acid-sensitive waters is recommended. The temporal integration of transient changes in spring meltwater chemistry is an important rationale for the development of such biomonitoring procedures.     

石油及其它有机污染的生物治理法

生物治理法作为治理有机污染物的有效途径已受到国内有关方面的广泛重视。现在跨行业、跨部门的各有关单位人员，从各个不同角度阐述了当今世界石油污染生物治理的现状。其中心是选择使用或培养有强降解能力的微生物进而达到彻底治理污染的目的。使用方法包括微生物法和微生物生态法。生物治理法的优点是：操作简便、处理费用低、效果好、对环境无污染、可以就地处理等。     

二段生化+物化法处理污水及中水回用的研究与设计

本文采用二段生物处理和物化处理相结合的处理方法处理某大学校区生活污水,实现处理效率高、占地面积小、工程投资低等特点,处理后各项指标均达到《生活杂用水水质标准》（CJ25．189）,处理费用为0．690元／m^3。     

活性污泥法处理低浓度含磷废水的试验研究

对比研究了厌氧—好氧交替条件下(AAA工艺)活性污泥对三组磷浓度不同的模拟生活废水的除磷效果。试验结果表明,活性污泥对磷浓度为6mg/L左右的废水处理效果最好,磷去除率可达97%;对磷浓度为16.66mg/L和2mg/L左右废水的磷去除率则分别为78.4%和75.3%;并探讨了活性污泥法的除磷机理。     

冲厕污水生物处理技术研究

主要研究了复合生物技术对冲厕污水有机污染物和NH4+-N的去除效果。结果表明,在进水COD和NH4+-N负荷分别为1.2~1.4 kg COD/(m3.d)和0.10~0.11 kg NH4+-N/(m3.d)时,出水COD和NH4+-N稳定维持在15 mg/L和5 mg/L,达到国家中水回用相关标准,满足了循环冲洗水水质要求,根本上实现了冲厕污水源头治理和资源化。     

光照对低浓度硫化氢气体生物法净化的影响

和种进行光照和避光的对比试验表明,光照能提高微生物对硫化氢废气的净化效率,最终产物为硫酸,净化效率和液相硫酸极的浓度随光照强度的增加而增加。避光时微生物对硫化氢废气的净化效率较低,但最终产物为单质硫。根据上述结果适宜的工艺流程应是首先将硫化氢废气通入避光的生物膜填料塔,把硫化氢转化为能回收的单质硫,然后再将废气通入光照的生物膜填料塔净化,进一步降低硫化氢废气的排放浓度。     

A multi-mutualist simulation: Applying biological market models to diverse mycorrhizal communities

We present a cellular automaton that simulates the interaction between a host tree and multiple potential mycorrhizal symbionts and generates testable hypotheses of how processes at the scale of individual root tips may explain mycorrhizal community composition. Existing theoretical biological market models imply that a single host is able to interact with and select from multiple symbionts to organize an optimal symbiont community. When evaluating the tree–symbiont interaction, two scales must be considered simultaneously: the scale of the entire host plant at which carbon utilization and nutrient demands operate, and the scale of the individual root tip, at which colonization and carbon-nutrient trade occurs. Three strategies that may be employed by the host tree for optimizing carbon use and nutrient acquisition through mycorrhizal symbiont communities are simulated: (1) carbon pool adjustment, in which the plant controls only the total amount of carbon to be distributed uniformly throughout the root system, (2) symbiont selection, wherein the plant opts either for or against the interaction at each fine root tip, and (3) selective carbon allocation, wherein the plant adjusts the amount of carbon allocated to each root tip based on the cost of nutrients. Strategies were tested over various nutrient availabilities (the amount of inorganically and organically bound nutrients). Success was defined on the basis of minimizing carbon expended for nutrient acquisition because this would allow more carbon to be utilized for growth and reproduction. In all cases, the symbiont selection and selective carbon allocation strategies were able to meet the nutritional requirements of the plant, but did not necessarily optimize carbon use. The carbon pool adjustment strategy is the only strategy that does not operate at the individual root tip scale, and the strategy was not successful when inorganic nutrients were scarce since there is no mechanism to exclude suboptimal symbionts. The combination of the symbiont selection strategy and the carbon pool adjustment resulted in optimal carbon use and nutrient acquisition under all environmental conditions but result in monospecific symbiont assemblages. On the other hand, the selective carbon allocation strategy is the only strategy that maintained successful, multi-symbiont communities. The simulations presented here thus imply clear hypotheses about the effect of nutrient availability on symbiont selection and mycorrhizal community richness and composition.