Total site: wastewater minimization: Wastewater reuse and regeneration reuse

Analysis of technological wastewater streams in a refinery and petrochemical complex was carried out. Wastewater flowrates, temperatures, pH and pollutant contents were measured. Regarding the characteristics of the individual waters, possible connections between water outflows from the processes or process units and potential water consumers were determined. Possibilities to reduce the flowrate of technological wastewater with wastewater reuse or preliminary regeneration and reuse were found. The consumption of fresh water could be lowered by 11.2 m³/h, reducing the treatment system load and prolonging its residence time by 7%. The payback period for the changes proposed in the petrochemical plants is 6 months with annual savings of US$27 630. The payback period for the changes proposed in the refinery is 11 days with annual savings of US$15 500.     

THROUGHFALL pH: EFFECT OF PRECIPITATION : TIMING AND AMOUNT1

ABSTRACT: Precipitation, throughfall, and stream pH were measured weekly over a 27-week period in 1982 on the Little Millseat watershed in eastern Kentucky. The average pH values over the study period were 4.3, 4.9, and 6.4, respectively, indicating significant buffering as water moved from the atmosphere, through the deciduous canopy, and through or over the soil to the stream. Regression analysis demonstrated that the timing and amount of precipitation were important factors influencing the pH of the throughfall. Weekly precipitation and the three-week average precipitation were statistically significant variables, explaining 53 percent of the variance in the observed through- fall pH. Precipitation pH was not a statistically significant variable for this watershed and sampling period.     

亚丁:最后的香格里拉

<正>人人都知道云南有个"香格里拉",可四川人却坚定地认为"香格里拉"是在四川甘孜藏族自治州的稻城亚丁。见识亚丁之美,先要体验"蜀道"之难。踏上前往稻城亚丁的道路,是随时有飞石、     

2006:环境监察

2006年第六次全国环境保护大会的召开和《国务院关于落实科学发展观加强环境保护的决定》的颁布是我国环境保护发展史上具有里程碑意义的大事.为贯彻温家宝总理提出的"三个转变"思想,落实《国务院决定》,2006年环境监察局监察处共调度指导处理的突发环境事件151起,赴现场处理处置突发环境事件24起,督办查处环境违法案件160余件,直接赴现场查处环境违法案件约20次;提交签报约300份,发文119个(其中上报国务院文件11个),各类材料200余份.