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目前,UASB已是现代高效厌氧反应器中应用最广泛的反应器之一,但是由于厌氧系统的启动时间较长,严重影响了UASB工艺在污水处理中的应用。针对这一问题,综述了一些能使UASB快速启动的技术和研究,以期为UASB工艺的实际应用起到指导作用。 相似文献
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《Communications in Soil Science and Plant Analysis》2012,43(5):795-805
Abstract The method described here is useful for the quick determination of soil moisture, especially when many determinations are to be made at a time. The only pieces of apparatus required are some wide‐mouthed conical flasks, a few pieces of glass rod and a balance. The principle involves recording the weight of the flask filled with water and soil sample of known weight (A). This flask weight (H), and the predetermined soil particle density (Dp) and weight of the water‐filled flask (G) are then used to calculate moisture percentage (MP) in the soil sample from the formula: The method was compared with conventional oven‐drying technique for a wide range of soil textures, moisture contents and other contrasting soil properties. The results obtained showed that the accuracy, precision and simplicity of the method are good, particularly for rapid practical uses. 相似文献
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综述了河豚毒素检测原理与发展趋势,提出了采用化学反应建立河豚毒素快速筛选技术供现场监督检测用;采用GC/MS等建立河豚毒素确证检测方法供实验室监督检测用。 相似文献
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《Communications in Soil Science and Plant Analysis》2012,43(14):1569-1582
Abstract Development of a nitrate quick‐test for use by fanners or field consultants would likely encourage the use of plant tissue and soil nitrate tests as a means to improve nitrogen management. To evaluate a quick‐test method, nitrate concentrations in plant tissue and soils were measured using commercially available nitrate test strips and a hand‐held reflectometer. The results were compared with those obtained with standard laboratory methods. Test strip accuracy and precision and reflectometer precision were determined over a 10 day period using standard KNO3solutions and colored paper strips. Coefficients of variation ranged from 22.4 to 9.5 percent for the test strips and from 3.5 to 1.6 percent for the reflectometer. Quick‐test results were highly correlated with laboratory results for both plant tissue nitrate (r=0.87) and soil nitrate (r=0.98) concentrations. Results indicated that test strips provide a rapid, reasonably accurate and precise method to determine nitrate concentrations in both soil and plant material 相似文献
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以西昌市城市污水厂为例,结合DE氧化沟污水处理工艺,研究活性污泥培养的相关问题。 相似文献
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畜禽饮水剂课题组 《郑州牧业工程高等专科学校学报》1996,(1)
选用水溶性能好,不显示副作用,无蓄积的抗菌药E作为饮水剂的抗菌成分.抗菌药E与氯化钠、氯化钾、碳酸氢钢、葡萄糖等合理配伍,制成好得快饮水剂,在三黄种鸡、艾维茵商品肉鸡、雉鸡、鹧鸪、朱斯鸡、猪、牛、犬等畜禽中的临床应用表明,好得快以1:20溶于常水中,令畜禽自由饮用,可有效防治鸡白痢、鸡大肠杆菌、仔猪副伤寒、猪传染性胃肠炎、犊牛副伤寒、犬胃肠炎、中暑、幼畜腹泻等疾病,治愈率达90%以上.在鸡的传染性法氏襄炎、盲肠肝炎、大肠杆菌病、新城疫等多种病中,配合使用好得快,可明显缩短病程,提高临床治愈率,对防制肠道多种细菌感染和继发,并发症效果显著. 相似文献