Sedimentation Channel

The sedimentation channel of an AguaClara water treatment plant ensures that the sedimentation tanks do not exceed their maximum influent flow. If that were to happen, the upflow velocity would be too great for flocs to settle out.

Example:

>>> from aguaclara.design.sed_chan import *
>>> sed_chan = SedimentationChannel(q = 20 * u.L / u.s, temp = 20 * u.degC)
>>> round(sed_chan.inlet_w, 5)
<Quantity(59.52756, 'inch')>

class aguaclara.design.sed_chan.SedimentationChannel(**kwargs)[source]

Design an AguaClara sedimentation channel.

The sedimentation channel relies on the number and dimensions of the sedimentation tanks in the same plant, but assumed/default values may be used to design a sedimentation channel by itself. To design these components in tandem, use aguaclara.design.sed.Sedimentor.

Constants:

SED_TANK_Q_RATIO (float): Permissible ratio of influent flow between the sedimentation tanks
PLANT_FREE_BOARD_H (float * u.cm): Freeboard height in the plant
WEIR_FREEBOARD_H (float * u.cm): Freeboard height of a channel weir
SED_DEPTH_EST (float * u.m): Estimated depth of the sedimentor

Design Inputs:

q (float * u.L / u.s): Flow rate (recommended, defaults to 20L/s)
temp (float * u.degC): Water temperature (recommended, defaults to 20°C)
sed_tank_n (int): Number of sedimentation tanks (recommended, defaults to 4)
sed_tank_w_inner (float * u.inch): Inner width of the sedimentation tank (recommended, defaults to 42 in)
sed_tank_wall_thickness (float * u.cm): Wall thickness of the sedimentation tank (recommended, defaults to 15 cm)
sed_tank_inlet_man_nd (float * u.cm): Nominal diameter of the sedimentation tank’s inlet manifold (recommended, defaults to 60 cm)
sed_tank_outlet_man_nd (float * u.cm): Nominal diameter of the sedimentation tank’s outlet manifold (recommended, defaults to 60 cm)
sed_tank_outlet_man_hl (float * u.cm): Head loss in the sedimentation tank’s outlet manifold (recommended, defaults to 4 cm)
sed_tank_diffuser_hl (float * u.mm): Head loss through a diffuser in the sedimentation tank (recommended, defaults to 0.09 cm)
sed_wall_thickness (float * u.cm): Wall thickness of the sedimentor (recommended, defaults to 15 cm)
weir_thickness (float * u.cm): Weir thickness (optional, defaults to 15 cm)
weir_hl (float * u.cm): Head loss over the weir (optional, defaults to 5 cm)
w_min (float * u.cm): Minimum width (optional, defaults to 30 cm)
fitting_s (float * u.cm): Fitting spacing (optional, defaults to 15 cm)
inlet_depth_max (float * u.cm): Maximum inlet channel depth (optional, defaults to 50 cm)
drain_sdr (int): SDR of the drain pipe (optional, defaults to 26)
outlet_free_h (float * u.cm): Permissible increase of water level in the outlet channel (optional, defaults to 5 cm) outlet_weir_depth:The depth of the outlet weir. (optional, defaults to 5 cm)
outlet_pipe_sdr (int): SDR of the outlet pipe (optional, defaults to 41)
outlet_pipe_hl_max (float * u.cm): Maximum head loss through the outlet pipe (optional, defaults to 1 cm)
outlet_pipe_nd_max (float * u.inch): Maximum nominal diameter of the outlet pipe (optional, defaults to 8 in)

property l: Length of the sedimentation channel.

property outlet_weir_hl: Head loss over the outlet channel weir.

property inlet_hl_max: Maximum head loss in the inlet channel.

property inlet_w_pre_weir: Width of the inlet channel (pre-weir).

property inlet_depth: Depth of the inlet channel.

property inlet_weir_hl: Head loss through the inlet channel weir.

property inlet_h: Height of the inlet channel.

property inlet_weir_h: Height of the inlet channel weir.

property inlet_w_post_weir: Width of the inlet channel (post-weir)

property inlet_w: Width of the inlet channel

property inlet_drain_box_w: Width of the inlet channel drain box

property outlet_depth: Depth of the outlet channel.

property outlet_weir_depth: Depth of the outlet channel weir.

property outlet_w_pre_weir: Width of the outlet channel (pre-weir).

property outlet_pipe_q_max: Maximum flow through the outlet pipe.

property outlet_pipe_n: Number of outlet pipes.

property outlet_post_weir_w: Width of the outlet channel (post-weir).

property outlet_w: Width of the outlet channel.

property outlet_drain_box_w: Width of the outlet channel drain box.

property outlet_weir_h: Height of the outlet channel weir.

property w_outer: Outer width of the sedimentation channel.

property inlet_last_coupling_h: Height of the last coupling in the inlet channel.

property inlet_step_h: Height of the steps between each pipe in the inlet channel.

property inlet_slope_l: Length of the slopes between each pipe in the inlet channel.