Water and wastewater analysis - DCM Process Control


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Technical Articles

Wastewater / Industrial

Ammonia / Biological Oxygen Demand / Chemical Oxygen Demand / Dissolved Oxygen / Ortho P

Water

Dissolved Organic Carbon / Distribution System/Raw Water Studies / SAC254 / Toxicity / Turbidity

Ammonia

Improved Nutrient Removal Using an On-line Ammonia Analyser to Control a Sewerage Treatment Plant

Advanced process control using an on-line NH3 analyser allows the production of improved and consistent effluent quality, with less aeration and a reduced N load to the environment.

Biological Oxygen Demand

Advanced Optimization of Biological Nutrient Removal Plants using Feedforward and Feedback Control - Case Studies

The performance of a wastewater treatment plant can be improved quite easily. Using advanced process control techniques, processes are improved and concentration of discharged components decreased.

Chemical

Oxygen Demand

Determination of COD in a Meat Processing Waste using the s::can spectro::lyser

The accurate and rapid determination of waste strength in food processing wastes is important for many reasons:

High strength wastes and uncontrolled variability in waste strength may represent the loss of valuable product.
Trade waste costs paid to a Water Authority are usually based on the strength of the waste discharged. Accurate and timely measurement ensures accurate charging.
Knowledge of the strength of incoming waste allows plant operators to optimise treatment processes and to verify compliance with trade waste agreements.

The s::can spectro::lyser offers an opportunity to measure COD directly on-line without the use of other chemicals.

The accurate and rapid determination of waste strength from food manufacturing industries is important to help control the loss of valuable product and to provide accurate information on which trade waste limits and charges can be checked. The s::can spectro::lyser offers the opportunity to rapidly study the effect of treatment over a full range of wavelengths, at multiple sites without having to wait for laboratory data.

Dissolved Oxygen

Superior DO Control with Zullig Probes Reduces Aeration Costs at STP's

Excellent aeration control is essential for the efficient operation of a modern Sewage Treatment Plant (STP).

The real cost of inaccurate and varying DO measurement includes:

wasted aeration power
reduced nutrient removal efficiency
poor effluent quality
possible excessive chemical use for pH and P removal

Fouling of membranes in Membrane D.O. probes can be demonstrated using a simple test. A D.O. sensor that reads low is likely to cause over aeration of the wastewater and cost money.

Success Story from Australia

Dissolved Oxygen Control in Industrial Waste Water Treatment. The cost of buying the Züllig sensors was paid back in 10 weeks...

Ortho P

Opportunities for Control of Real Time Data - Online P Monitoring Aids Optimisation of P Removal

On-line analysers allow the collection of large quantities of real time data in an easily interpreted form. Imagine being able to alter the control parameters at your plant one day and seeing the outcome when you wake up the following morning, without having to raise a finger to collect samples or carry out endless bench tests.

Dissolved Organic Carbon

Removal of Organics during Water Treatment Studies using the s::can spectro::lyser

Organic material that is not removed by conventional water treatment contributes to a number of problems in modern water supply systems. The s::can spectro::lyser offers the opportunity to rapidly study the effect of treatment over a full range of wavelengths, at multiple sites without having to wait for laboratory data.

Management of drinking water quality requires the routine measurement of an increasing number of parameters. More recently the need to measure parameters associated with the general organic content of the water has become important.

Distribution System / Raw Water Studies

Distribution System Studies using UV-VIS Spectroscopy and the s::can spectro::lyser

The distribution system was long considered a simple system of pipes conveying water from a raw water source of Water Treatment Plant to the customer. It is now recognised as a complex bioreactor that has the potential to adversely affect the quality of water delivered to the customer. UV-VIS spectroscopy using the s::can spectro::lyser provides a way to qualitatively monitor these effects.

Many Water Authorities face taste and odour problems in their water supply systems. These problems are often transitory and geographically separate. They are notoriously difficult to study and can be difficult to treat. UV-VIS spectroscopy, using the s::can spectro::lyser provides a way to qualitatively study these problems and to monitor the effectiveness of process modifications.

SAC254

spectro::lyers for Drinking Water and Environmental Monitoring

In order to prevent any jeopardy to the drinking water consumers' health, the measure data must be available continuously and without delay. This is the only way to allow quick reaction to changes in the water quality. These requirements can only be fulfilled by on-line assessment of the raw and drinking water qualities.

Toxicity

spectro::lyers for Drinking Water and Environmental Monitoring

Turbidity

spectro::lyers for Drinking Water and Environmental Monitoring

taking the guesswork out of water and wastewater

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