###############################################################################
# WaterTAP Copyright (c) 2021, The Regents of the University of California,
# through Lawrence Berkeley National Laboratory, Oak Ridge National
# Laboratory, National Renewable Energy Laboratory, and National Energy
# Technology Laboratory (subject to receipt of any required approvals from
# the U.S. Dept. of Energy). All rights reserved.
#
# Please see the files COPYRIGHT.md and LICENSE.md for full copyright and license
# information, respectively. These files are also available online at the URL
# "https://github.com/watertap-org/watertap/"
#
###############################################################################
"""
This module contains a zero-order representation of a reactive anaerobic
digestion unit operation.
"""
from pyomo.environ import Var, units as pyunits
from idaes.core import declare_process_block_class
from watertap.core import build_sido_reactive, constant_intensity, ZeroOrderBaseData
# Some more information about this module
__author__ = "Travis Arnold"
[docs]@declare_process_block_class("AnaerobicDigestionReactiveZO")
class AnaerobicDigestionReactiveZOData(ZeroOrderBaseData):
"""
Zero-Order model for a reactive anaerobic digestion unit.
"""
CONFIG = ZeroOrderBaseData.CONFIG()
[docs] def build(self):
super().build()
self._tech_type = "anaerobic_digestion_reactive"
build_sido_reactive(self)
constant_intensity(self)
if (
self.config.process_subtype == "default"
or self.config.process_subtype is None
):
# Create water flux variable
self.biogas_tss_ratio = Var(
units=pyunits.m**3 / pyunits.kg,
bounds=(0, None),
doc="Ratio of m^3 biogas produced / kg TSS in influent",
)
self._perf_var_dict[
"Ratio of m^3 biogas produced / kg TSS in influent"
] = self.biogas_tss_ratio
self._fixed_perf_vars.append(self.biogas_tss_ratio)
self.biogas_production = Var(
self.flowsheet().time,
units=pyunits.m**3 / pyunits.s,
bounds=(0, None),
doc="Biogas production",
)
self._perf_var_dict["Biogas production"] = self.biogas_production
@self.Constraint(
self.flowsheet().time, doc="Constraint for biogas production"
)
def biogas_prod(b, t):
return b.biogas_production[t] == (
pyunits.convert(
b.biogas_tss_ratio * b.properties_in[t].flow_mass_comp["tss"],
to_units=pyunits.m**3 / pyunits.s,
)
)
if self.config.process_subtype == "GLSD_anaerobic_digester":
self.HRT = Var(
units=pyunits.hour,
doc="Hydraulic retention time",
)
self._fixed_perf_vars.append(self.HRT)
self._perf_var_dict["Hydraulic retention time"] = self.HRT
self.reactor_volume = Var(
self.flowsheet().time,
units=pyunits.m**3,
doc="Reactor volume",
)
@self.Constraint(self.flowsheet().time, doc="Constraint for reactor volume")
def reactor_volume_cons(b, t):
return b.reactor_volume[t] == (
pyunits.convert(
b.HRT * b.properties_in[t].flow_vol,
to_units=pyunits.m**3,
)
)
self._perf_var_dict["Reactor volume"] = self.reactor_volume