Water and wastewater projects are carried out for municipalities and industrial facilities, most often with foreign technology providers. The design rests on the characteristics of the influent and on the limits that must be met at the outlet. Carrying over these two parameter sets correctly is the plant's guarantee itself.
Influent parameters
The characteristics of the water arriving at the plant are the starting point of the design and are given in a table. Each parameter has meaning with its unit and measurement method. It is carried over with its table structure.
Effluent limits
The values the treated water must meet rest on legislation and on the permit. Limit values are not updated; they are carried over as they stand in the document. Parameter names are fixed.
Parameter abbreviations
Pollution parameters are referred to by abbreviations, and these abbreviations are established in the sector. The abbreviations are carried over. They may be expanded on first mention.
Guaranteed treatment efficiency
The supplier guarantees a specific treatment efficiency, and this guarantee is verified by measurement. The conditions of the guarantee are defined in the text. The conditions are not skipped.
Process flow diagrams
The treatment steps are shown in a diagram, and every unit is tagged. The tags are shared across the documents. They are not changed.
Unit sizing
The volume and capacity of each unit rest on calculations and are given in a table. The calculation method is stated. Values are carried over with their units.
Hydraulic calculations
Flow rates and level differences determine how the plant works and are reported separately. Flow rate units are not mixed up. The level reference is preserved.
Equipment data sheets
Equipment such as pumps, blowers and mixers comes with data sheets. The tag numbers match the diagram. The match is verified.
Chemical dosing information
The dosing of the chemicals used in treatment determines operating cost and efficiency. Dosing values are given with their units. The fields are verified.
Sludge production calculations
The quantity of sludge produced by treatment is calculated and determines the disposal plan. Quantity units are not mixed up. The values are carried over.
Discharge permit documents
Releasing wastewater into the receiving environment is subject to a permit, and the permit sets limits parameter by parameter. The permit number and term are carried over. The conditions are translated in full.
Monitoring and sampling
The effluent is monitored regularly and samples are analysed. The sampling conditions affect the result. The information is preserved.
Analysis reports
Laboratory results are presented in comparison with the limit values. The two columns are not mixed up. Method numbers are carried over.
Operating records
Daily operating data are recorded and show the performance of the plant. The record forms have a field structure. The fields are carried over in full.
Commissioning protocols
The plant is tested before it is handed over, and the results are put on record in a protocol. The protocol carries signatures and dates. The information is preserved.
Drinking water projects
In drinking water treatment different parameters and strict limits apply. The parameter list is separate. The terminology list is set up according to the type of project.
Networks and transmission mains
Water transmission mains are defined by pipe specifications and pressure classes. Class notations are preserved. Route details are carried over.
The costliest mistake in this sector
Carrying over one of the influent parameters wrongly leads to the plant being designed for the wrong capacity. The mistake emerges only when the plant starts operating, and correcting it requires structural change. Parameter tables are verified separately.