5

âž” Laboratory automation: see Chapter 9 âž” Samplers: see Chapter 10 âž” Process measurement technology: see Chapter 11-20

WW DWPW

Wastewater Drinking water Process water

Made-to-measure solutions for waste- water analysis in the municipal and industrial sectors Dependable analysis for providers and users Process and laboratory analysis for spe- cial analytical problems

Chlorine Metals Microbiology Other parameters

Disinfectants are used to eli-minate microorganisms from drinking water and recreatio-nal water. Besides chlorine,products such as chlorine dioxide, ozone, iodine and bromine are used. Careful analysis of these substances is not just advisable on eco- nomic grounds. It is essential,since disinfectants and theirreaction products are asso- ciated with risk potential.From paddle testers throughto quality controlled laboratory analysis and analysers forprocess control applications,HACH LANGE has a com- plete range of products for disinfection analysis. Many metals from industrialprocesses may be present in wastewater. Metals may alsobe present in drinking waterdue to geological circumstan- ces and corroded pipes. Alt- hough the toxicity of metals varies widely, they are all rated as having a very high risk potential. Metals are notbiodegradable and thereforeaccumulate in activated slud- ge systems. Metals are usu-ally present in water samplesin complex forms, so a spe- cial sample preparation hasto be carried out before theanalysis can be performed. HACH LANGE metal analysis covers all relevant parame-ters, from aluminium, copperand nickel to zinc. Bacteria, fungi and othermicroorganisms in drinking water and recreational watercan be a cause of disease,while in industrial plants they may form troublesome coa- tings. The HACH LANGE range of products enables quantitative and qualitative microbiological tests of surfa-ces and water to be carriedout in conformity with legal requirements. Ready-to-usetests, media and accessoriesare available, together with a variety of methods, e. g.membrane filtration, MPN,Presence/Absence, BART and paddle testers. In con- trast, the luminescent testuses bacteria as a tool todetermine the toxicity of water and soil. Special parameters need to be analysed in water for many reasons, such asmonitoring a process or alegally specified value— cyanides or surfactants in industrial wastewater, orga- nic acids in aeration tanks, biogas fermenters and diges- ters, hardness in drinkingwater, chloride, sulphate andsilica in water treatment sys- tems, colour values such asiodine, Hazen and Gardner inindustrial quality control, and many others. HACH LANGEcan supply a comprehensiverange of products for a varie- ty of parameters and needs.

âž” Laboratory analysis: see page 16 âž” Laboratory analysis: see page 16 âž” Process measurementtechnology: see page 95 âž” Process measurement technology: see page 95 âž” Laboratory analysis: see page 16 âž” Laboratory analysis: see page 16