نتایج جستجو برای: awwa
تعداد نتایج: 75 فیلتر نتایج به سال:
Allentown, Pa.; Bayonne, N.J.; Flint, Mich.; Newark, and Jackson, Miss., are a few of the communities that have had serious water issues involving an underfunded utility in need critical intervention. That intervention came, it arrived variety forms. In Allentown public–public arrangement with independent authority, Lehigh County Authority, turned things around. Bayonne public–private partnersh...
The concept of source water protection for potable water—embodied in AWWA's Utility Management Standard G300, Source Water Protection, and originally highlighted the 1996 amendments to Safe Drinking Act (SDWA)—is making a comeback. Yet so many challenges provision healthy drinking are out control utility operators. Per- polyfluoroalkyl substances (PFAS) group persistent, bioaccumulative toxins ...
در دو دهه اخیر روند رو به رشد صنعت آب و احداث سدهای مختلف، طراحی و تولید سیستم های مکانیکی متناسب با این نیاز به ضرورتی استراتژیک تبدیل نموده است. از جمله این سیستم های مکانیکی شیرهای پروانه ای قطر بالا می باشند که به دلیل مزایای مختلف آنها از جمله سادگی، هزینه پایین، ایجاد افت فشار پایین در حالت کاملا باز، و فضای مورد نیاز کم مورد توجه زیادی هستند. برای راه اندازی شیرهای پروانه ای قطر بالا، ...
ضربه قوچ به عنوان یک پدیده هیدرولیکی ، در اثر هرگونه تغییر سرعت جریان وبه دنبال آن افزایش یا کاهش ناگهانی فشار در خط لوله پدید می آید. وقوع ناگهانی این پدیده یا در صورت عدم کنترل ،تکرار آن منجر به صدمات جبران ناپذیری به خط لوله خواهد شد .لذا در این تحقیق ، هدف تهیه مدل ریاضی جامعی برای بهینه سازی سیستم های انتقال پمپاژو ثقلی در محیط matlab می باشد ،به طوریکه که خط انتقال مدل شده توسط آن ، در اث...
The textile industry is the main source of environmental pollution in terms quality and quantity. It consumes large amounts water (200 m3/ tonne products), around 90% quantity wastewater. Improper disposal wastewater will cause serious problems due to presence heavy metals waste which adversely affect aquatic organisms. To analyze, concentration (batik) was collected from 15 small, medium, larg...
2016 © American Water Works Association JOURNAL AWWA OCTOBER 2016 | 108:10 Water disinfection is one of the most important health advances, as millions of people worldwide receive quality drinking water every day from water systems (Calderon 2000). Chlorine, chloramines, chlorine dioxide, ozone, and ultraviolet irradiation are the most common disinfectants in use today; each produces its own su...
A human health risk assessment of artisanal miners exposed to toxic metals in water bodies and sediments in the PresteaHuni Valley District of Ghana was carried out in this study, in line with US EPA risk assessment guidelines. A total of 70 water and 30 sediment samples were collected from surface water bodies in areas impacted by the operations of artisanal small-scale gold mines in the study...
Once a society's water issues are resolved, time becomes its most precious resource. However, never resolved for long because the world keeps changing and capabilities expectations evolve along with it. As public's understanding of engagement expand, industry needs to develop approaches that serve customers today yet keep in mind how systems should work future. AWWA's Water 2050 effort seeks lo...
Author's note: On June 9, 2021, I testified on behalf of AWWA to the US Senate's Committee Environment and Public Works topic per- polyfluoroalkyl substances (PFAS). The following are edited excerpts from that testimony. Drinking water utilities state environmental agencies need know where focus monitoring efforts understand what risks may be in source waters. To do that, we PFAS compounds have...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید