Iron And Manganese Removal (ZO)

Model Type

This unit model is formulated as a single-input, double-output model form. See documentation for single-input, double-output Helper Methods.

Electricity Consumption

The constraint used to calculate energy consumption is described in the Additional Constraints section below. More details can be found in the unit model class.

Costing Method

Costing is calculated using the cost_iron_and_manganese_removal() method. For full details on costing, see documentation for the zero-order costing package.

Additional Variables

Description

Variable Name

Units

Ratio of air to water

air_water_ratio

\(dimensionless\)

Flow basis

flow_basis

\(m^3/h\)

Air flow rate

air_flow_rate

\(m^3/h\)

Constant in electricity intensity equation

electricity_intensity_parameter

\(h*hp/m^3\)

Dual media filter surface area

filter_surf_area

\(m^2\)

Number of dual media filter units

num_filter_units

\(dimensionless\)

Power consumption of iron and manganese removal

electricity

\(kW\)

Specific energy consumption with respect to feed flowrate

electricity_intensity

\(kWh/m^3\)

Additional Constraints

Description

Constraint Name

Air flow rate constraint

air_flow_rate_constraint

Electricity intensity constraint

electricity_intensity_constraint

Power consumption constraint

electricity_constraint

Class Documentation

This module contains a zero-order representation of an iron and manganese removal unit.

class watertap.unit_models.zero_order.iron_and_manganese_removal_zo.IronManganeseRemovalZO(*args, **kwds)
Parameters:
  • rule (function) – A rule function or None. Default rule calls build().

  • concrete (bool) – If True, make this a toplevel model. Default - False.

  • ctype (class) –

    Pyomo ctype of the block. Default - pyomo.environ.Block

    Config args

    dynamic

    All zero-order models are steady-state only

    has_holdup

    Zero order models do not include holdup

    property_package

    Property parameter object used to define property calculations, default - useDefault. Valid values: { useDefault - use default package from parent model or flowsheet, PhysicalParameterObject - a PhysicalParameterBlock object.}

    property_package_args

    A ConfigBlock with arguments to be passed to a property block(s) and used when constructing these, default - None. Valid values: {see property package for documentation.}

    database

    An instance of a WaterTAP Database to use for parameters.

    process_subtype

    Process subtype to use when looking up parameters from database.

    isothermal

    Isothermal assumption, or ignore temperature variables in unit. Default=True

    isobaric

    Isobaric assumption, or ignore pressure variables in unit. Default=True

  • initialize (dict) – ProcessBlockData config for individual elements. Keys are BlockData indexes and values are dictionaries with config arguments as keys.

  • idx_map (function) – Function to take the index of a BlockData element and return the index in the initialize dict from which to read arguments. This can be provided to override the default behavior of matching the BlockData index exactly to the index in initialize.

Returns:

(IronManganeseRemovalZO) New instance

class watertap.unit_models.zero_order.iron_and_manganese_removal_zo.IronManganeseRemovalZOData(component)[source]

Zero-Order model for an iron and manganese removal unit operation.

build()[source]

General build method for UnitModelBlockData. This method calls a number of sub-methods which automate the construction of expected attributes of unit models.

Inheriting models should call super().build.

Parameters:

None

Returns:

None

static cost_iron_and_manganese_removal(blk, number_of_parallel_units=1)[source]

General method for costing iron and manganese removal processes. Capital cost is based on the cost of air blower, backwash and dual media filter. This method also registers the electricity demand as a costed flow. :param number_of_parallel_units: number_of_parallel_units parallel units (default: 1) :type number_of_parallel_units: int, optional