Material Content Section - Water Quality

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Navigation: Models ➔ Common Sections ➔ Material Content Section ➔ Water Quality

Material (Content) Content Tab Include Properties Species (Sp) Optional Tabs
Basic Information Energy
ValuesAtUserTandP
Density Correction
Solubility
Saturation
Acidity
Charge
Transport
HeatsOfCombustion
Heating Values
Solution Impurity
H2O Properties
Water Quality Sp Tab
EC Tab
DLockup
LockUp
DTrack
Track
DSz
Sz
MSz
DSSA
SSA

Related Links: Common Content Section, Plant Model - Water Quality Tab


Water Quality

This section will show water quality values. These will only be shown if the user has chosen to display the WaterQualities in the Plant Model - Views tab page or from the Include Properties dropdown list on the first page of the material Content section. The values will appear on a new tab page called 'WQ'.

Note: As defined on the Plant Model - Water Quality Tab, some calculations require specific aqueous species (mostly ionic species) to be defined within the project. The required species for each calculation are defined in this section.

Tag (Long/Short) Input / Calc Description/Calculated Variables / Options
WQ (Water Quality)
WaterMass / WaterMt Calc The mass of pure water in the content.
LiquidMass / LMt Calc The mass of liquids in the content.
LiquidVol / LVt Calc The volume of liquids in the content.
Alkalinity (as CaCO3 equivalent)
Alkalinity.Total Calc The Total Alkalinity is defined as: [HCO3-(aq)] + 2*[CO32-(aq)] + [OH-(aq)] + [B(OH)4-(aq)] + 3*[PO43-(aq)] + 2*[HPO42-(aq)] + [H2PO4-(aq)] + [SiO(OH)3-(aq)] - [H+(aq)] - [HSO4-(aq)] - [F-(aq)]
and is reported as CaCO3 equivalent liquid concentration. Not all ions have to be present in the project.
The Total Alkalinity is sometimes referred to as M-Alk (Methyl-orange Alkalinity) as it represents the methyl-orange titration end-point at pH = 4.5.
Alkalinity.Carbonate / Carb Calc The Carbonate Alkalinity is equal to the concentration of the aqueous carbonate ion (CO32-(aq)), reported as CaCO3 equivalent liquid concentration.
Alkalinity.BiCarbonate / BiCarb Calc The Bicarbonate Alkalinity is equal to the concentration of the aqueous bicarbonate ion (HCO3-(aq)), reported as CaCO3 equivalent liquid concentration.
Alkalinity.Hydroxide / Hydrox Calc The Hydroxide Alkalinity is equal to the concentration of the aqueous hydroxide ion (OH-(aq)), reported as CaCO3 equivalent liquid concentration.
Alkalinity.P_Alk Calc P-Alk (Phenolphthalein Alkalinity) represents the phenolphthalein titration end-point at pH = 8.3. It is defined as: [OH-(aq)] + 0.5*[CO32-(aq)], reported as CaCO3 equivalent liquid concentration.
Acidity
EquivalentMineralAcidity / EMA Calc The Equivalent Mineral Acidity (EMA) is defined as: [Cl-(aq)] + [SO42-(aq)] + [NO3-(aq)] + [PO43-(aq)] + [B(OH)4-(aq)] + [F-(aq)] + [Br-(aq)] + [ClO4-(aq)]
and is reported as CaCO3 equivalent liquid concentration. Not all ions have to be present in the project.
FreeMineralAcidity / FMA Calc The Free Mineral Acidity (FMA) is defined as the sum of the following liquid concentrations: [Cl-(aq)] + [SO42-(aq)] + [NO3-(aq)] + [PO43-(aq)] + [B(OH)4-(aq)] + [F-(aq)] + [Br-(aq)] + [ClO4-(aq)]
Not all ions have to be present in the project.
Hardness (as CaCO3 equivalent)
Hardness.Total Calc The Total Hardness (TH) is defined as the sum of all multivalent (charge >= 2) aqueous cations such as Al3+(aq), Ba2+(aq), Ca2+(aq), Fe2+(aq), Fe3+(aq) and Mg2+(aq), reported as CaCO3 equivalent liquid concentration.
Hardness.NonCarbonate / NonCarb Calc The Non-Carbonate Hardness is equal to Total Hardness - Total Alkalinity, reported as CaCO3 equivalent liquid concentration.
Hardness.Carbonate / Carb Calc The Carbonate Hardness is equal to Total Hardness - Non-Carbonate Hardness = Total Alkalinity, reported as CaCO3 equivalent liquid concentration.
Hardness.Calcium / Ca Calc The Calcium Hardness is equal to the concentration of the aqueous calcium ion (Ca2+(aq)), reported as CaCO3 equivalent liquid concentration.
Hardness.Magnesium / Mg Calc The Magnesium Hardness is equal to the concentration of the aqueous magnesium ion (Mg2+(aq)), reported as CaCO3 equivalent liquid concentration.
Solids
TotalDissolvedSolids / TDS Calc The Total Dissolved Solids (TDS) is the sum of all liquid species (not including water), reported as a liquid concentration. This is equivalent to performing a TDS analysis in the laboratory at 105°C.
[email protected] / [email protected] Calc The Total Dissolved Solids (TDS) at 180 is equivalent to performing a TDS analysis in the laboratory at 180°C. At this temperature the bicarbonate breaks down as follows:
2HCO3-(aq) -> CO32-(aq) + CO2(g) + H2O(g)
Thus [email protected] is equal to the sum of all liquid species (not including water) except every mole of HCO3-(aq) is replaced with half of mole of CO32-(aq), and it is reported as a liquid concentration.
AqTotalDissolvedSolids / AqTDS Calc The Aqueous Total Dissolved Solids (AqTDS) is the sum of all aqueous species (not including water), reported as a liquid concentration.
TotalSuspendedSolids / TSS Calc The Total Suspended Solids (TSS) is the sum of all solids species, reported as a slurry (liquids + solids) concentration.
Carbon (as C Concentration)
TotalCarbon / TC Calc The total concentration of carbon in the content (both solids and liquids), reported as a slurry (liquids + solids) concentration. All liquid and solids species which contain carbon will contribute to this value.
TotalOrganicCarbon / TOC Calc The concentration of organic carbon in the content based on the user selected organic carbon species on the WaterQuality tab of the Plant Model, reported as a slurry (liquids + solids) concentration.
TotalInorganicCarbon / TIC Calc The Total Inorganic Carbon (TIC) is simply the difference between the Total Carbon (TC) and the Total Organic Carbon (TOC), reported as a slurry (liquids + solids concentration). All liquid and solids species which contain carbon and have NOT been selected as organic carbon species on the WaterQuality tab of the Plant Model, will contribute to this value.
DissolvedOrganicCarbon / DOC Calc The concentration of organic carbon in the content based on the user selected liquid organic carbon species on the WaterQuality tab of the Plant Model, reported as a slurry (liquids + solids) concentration.
SuspendedOrganicCarbon / SOC Calc The concentration of organic carbon in the content based on the user selected solid organic carbon species on the WaterQuality tab of the Plant Model, reported as a slurry (liquids + solids) concentration.
Oxygen and Oxygen Demand (as O2 Concentration)
DissolvedOxygen / DO Calc The liquid concentration of aqueous oxygen (O2(aq)).
ChemicalOxygenDemand / COD Calc The oxygen required for chemical oxidation of material in the content (such as by potassium dichromate), reported as a liquid concentration of aqueous oxygen (O2(aq)). This is calculated by multiplying the Total Organic Carbon (TOC) by a user-defined factor which is set on the WaterQuality tab of the Plant Model.
UltimateBiochemicalOxygenDemand / UBOD Calc The ultimate amount of oxygen required by micro-organisms to break down organic material in the content, reported as a liquid concentration of aqueous oxygen (O2(aq)). This is calculated by multiplying the Total Organic Carbon (TOC) by a user-defined factor which is set on the WaterQuality tab of the Plant Model.
BiochemicalOxygenDemand5 / BOD5 Calc The oxygen required by micro-organisms to break down organic material in the content in the first 5 days, reported as a liquid concentration of aqueous oxygen (O2(aq)). This is calculated by multiplying the Ultimate Biochemical Oxygen Demand (UBOD) by (1-10^(-5k)), where k is the user-defined rate constant (units /day), which is set on the WaterQuality tab of the Plant Model. This equation assumes that any oxidation is a first-order reaction.
Nitrogen (as N Concentration)
Nitrogen.Total Calc The total concentration of nitrogen in the content (both solids and liquids), reported as a slurry (liquids + solids) concentration. All liquid and solids species which contain nitrogen will contribute to this value.
Nitrogen.Organic Calc The concentration of organic nitrogen in the content based on the user selected organic nitrogen species on the WaterQuality tab of the Plant Model, reported as a liquid concentration.
Nitrogen.Ammonia / NH3 Calc The Ammonia Nitrogen is the concentration of nitrogen present in aqueous ammonia (NH3(aq)) and the aqueous ammonium ion (NH4+(aq)), reported as a slurry (liquids + solids) concentration.
Nitrogen.Nitrite / NO2 Calc The Nitrite Nitrogen is the concentration of nitrogen present in the aqueous nitrite ion (NO2-(aq)), reported as a slurry (liquids + solids) concentration.
Nitrogen.Nitrate / NO3 Calc The Nitrate Nitrogen is the concentration of nitrogen present in the aqueous nitrate ion (NO3-(aq)), reported as a slurry (liquids + solids) concentration.
Electrical Conductivity
Conductivity Calc The electrical conductivity of the content. This is calculated by multiplying the Total Dissolved Solids (TDS) by a user-defined ratio which is set on the WaterQuality tab of the Plant Model.