Afhalen na 1 uur in een winkel met voorraad
Gratis thuislevering in België vanaf € 30
Ruim aanbod met 7 miljoen producten

Afhalen na 1 uur in een winkel met voorraad
Gratis thuislevering in België vanaf € 30
Ruim aanbod met 7 miljoen producten

Winkels

Verlanglijstje

Winkels

Verlanglijstje

Zoeken

Volg ons op

Wist je dat er in Vlaanderen voor iedereen een Standaard Boekhandel is binnen een straal van 7 km?

Zoek een winkel

€ 167,95

+ 335 punten

Levertermijn 1 à 4 weken

Eenvoudig bestellen

Veilig betalen

Gratis thuislevering vanaf € 30 (via bpost)

Gratis levering in je Standaard Boekhandel

Omschrijving

Utilities across the USA rely on online monitors to help them track important parameters such as disinfectant residual and particle removal. However, there are no guidelines on how to operate these monitors so that they are consistent and measure as accurately as possible. This study investigated the current uses of all online monitors in plants and their calibration and maintenance procedures in order to gain an understanding of the current industry standards. The purpose of this project was to evaluate how utilities are using and maintaining their online equipment and to provide guidelines for utilities to consider in their online monitoring program. The status of online instrument use in U.S. water utilities was surveyed. The survey was completed by 264 utilities representing 392 treatment plants. Case studies of six utilities were performed to supplement the survey results by recording, in-depth, the instrument uses, maintenance practices, instrument support structure, and supervisory structure as related to online instrument use. In addition, case studies provided online and bench data from their online instruments for analysis. The utilities selected included conventional filtration, direct filtration, lime softening, and unfiltered systems with widely varying source water quality. A sample Standard Operating Procedure (SOP) was developed to provide utilities with guidance in creating SOPs.