UASB系统中pH值与污泥浓度控制的探讨

介绍了啤酒生产废水处理工艺UASB系统,分析了pH值、污泥量对UASB系统的影响,并提出了保证出水水质达标的措施.     

城市污泥好氧堆肥过程中能量平衡的理论分析

从热力学角度研究城市污泥的好氧堆肥过程,根据热力学第一定律,建立了好氧堆肥过程中的能量平衡关系,并给出了平衡关系中各参数的计算方法。     

热解析气相色谱法测定土壤中苯系物

建立了用热解析气相色谱法测定土壤中苯系物的方法.采用保留时间定性,外标法定量.方法检出限分别为:苯1.8 μg·L-1、甲苯3.5 μg·L-1、乙苯7.0 μg·L-1、间二甲苯8.6 μg·L-1、对二甲苯8.6 μg·L-1、邻二甲苯9.8 μg·L-1、苯乙烯10.0 μg·L-1;加标回收率在79%～100%之间,相对标准偏差为1.5%～3.9%.方法操作简便,快速,灵敏度高,能适应现代化的应急监测.     

Seed yeast cultivation for salad oil manufacturing wastewater treatment

The mixture of five yeast strains obtained from soil could remove about 85% TOC of oil-rich wastewater in batch test.While the highest MLSS was obtained at an N:C of 1:5,the oil removal decreased with the increase of N:C during yeast sludge cultivation.Ammonium chloride was the best nitrogen source for yeast cultivation from the viewpoint of yeast growth and oil utilizxation.An ammonia concentration of over 1300 mg/L led to mass death of yeast at a pH of 5.The ammonia concentration should be controlled at a level of 1000 mg/L or lower.     

入冬水生高等植物的衰亡对河流水质的影响

上海市郊河流水体中有很高的氮、磷和有机负菏，由于受水生高等植物生灭的影响，初春河流中的氮、磷和有机负菏明显高于上一年的初冬，河流中的水生高等植物能大量地吸收水体中的氮、磷，抑制藻类生长，净化水质；但其植株残体在水中的腐解，又会重新释出营养元素，造成对水体的二次污染。在冬季，随着水生高等植物的大量死亡这种污染更加明显，应加强对水生高等植物的利用，尝试建立既能净化水质，又有创造经济效益的生态工程模式，使市郊受污水体得到资源化利用。     

稻、土及田水中锐劲特残留量分析方法

建立了新型杀虫剂锐劲特及其代谢物在水稻、土壤、田水中的气相色谱毛细管柱残留分析方法。该方法对锐劲特及其代谢物MB46513、MB45950、MB46136、RPA200766等，在水稻中的最低检出浓度依次为：0.002,0.001,0.001,0.004,0.01mg/kg；在土壤中这几种组分最低检出浓度为水稻中的1／3；在田水中最低检出浓度为水稻中的1／25。加标回收率83.4%-97.7%。变异系数1.86%-7.07%。     

复配絮凝剂的筛选及其在炼油污泥中的应用

通过试验筛选出对炼油污泥处理效果好的复配絮凝剂。试验和现场应用结果表明：使用有机高分子絮凝剂(PAM)分别和无机高分子絮凝剂(PAC)复配处理炼油污泥比单独使用任何一种絮凝剂的处理效果更好，复配絮凝剂具有适应性广、投加量少、浮渣少等优点，处理后的污水可以达到排放标准。     

循环式活性污泥法处理污水工艺研究

循环式活性污泥法是通过厌氧装置培养优化的活性污泥,然后在曝气池中进行同步的硝化反硝化过程,从而达到脱氮除磷的效果。     

Toxic metals in sewage sludge-amended soils: has promotion of beneficial use discounted the risks?

Land application of contaminated waste products has been defended as beneficial use by some scientists and regulators, based on the premise that the behavior of any toxins accumulated in soils from this practice is reasonably well understood and will not have detrimental agronomic or environmental impacts into the foreseeable future. In this review, I use the case of toxic metals in sewage sludges applied to agricultural land to illustrate that metal behavior in soils and plant uptake is difficult to generalize because it is strongly dependent on the nature of the metal, sludge, soil properties and crop. Nevertheless, permitted agricultural loadings of toxic metals from sewage sludges are typically regulated using the sole criterion of total metal loading or concentrations in soils. Several critical generalizing assumptions about the behavior of sludge-borne metals in soil-crop systems, built into the US EPA risk assessment for metals, have tended to underestimate risks and are shown not to be well justified by published research. It is argued that, in the absence of a basic understanding of metal behavior in each specific situation, a more precautionary approach to toxic metal additions to soils is warranted.     

机械强化污泥回流式一体化活性污泥法的运行机理研究

活性污泥通过机械搅拌强化污泥内循环回流,提高了污泥的活性,并且使污泥浓度可达到4.5kg/m3,用该机械强化污泥回流式一体化活性污泥法处理小区生活污水,当水力停留时间为3h,溶解氧为2.2mg/L,机械搅拌速度为250r/min时,CODcr、氨氮去除率均可达到83% 以上,出水达到国家污水排放一级标准.该一体化活性污泥法简单易行,运行成本低,投资小,操作维护方便,是生活小区生活污水适宜的处理工艺技术.