Entrance Tank

The entrance tank of an AguaClara water treatment plant

  1. removes large grit particles using plate settlers,

  2. contains the Linear Flow Orifice Meter (LFOM), which maintains a linear relation between flow and water level, and

  3. introduces chemical dosing through the CDC <add link> using the water level set by the Linear Flow Orifice Meter (LFOM).

Example:
>>> from aguaclara.design.ent import *
>>> ent_tank = EntranceTank(q = 20 * u.L / u.s, floc_chan_w = 42.0 * u.inch)
>>> ent_tank.plate_n
<Quantity(11.0, 'dimensionless')>
class aguaclara.design.ent.EntranceTank(**kwargs)[source]

Design an AguaClara plant’s entrance tank.

An entrance tank’s design relies on the LFOM’s and flocculator’s design in the same plant, but assumed/default values may be used to design an entrance tank by itself. To design these components in tandem, use aguaclara.design.ent_floc.EntTankFloc.

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)

  • lfom_nd (float * u.inch): The LFOM’s nominal diameter (recommended, defaults to 2”)

  • floc_chan_w (float * u.inch): The flocculator’s channel width (recommended, defaults to 42”)

  • floc_chan_depth (float * u.m): The flocculator’s channel depth (recommended, defaults to 2m)

  • plate_s (float * u.cm): The spacing between plates in a plate settler (optional, defaults to 2.5cm)

  • plate_thickness (float * u.deg): The thickness of a plate in a plate settler (optional, defaults to 2mm)

  • plate_angle (float * u.deg): The angle of the plate settler (optional, defaults to 60 degrees)

  • plate_capture_vel (float * u.mm / u.s): The capture velocity of the plate settler (optional, defaults to 8m/s)

  • fab_s(float * u.cm): The space needed for a person to remove the drain pipe (optional, defaults to 5cm)

  • sdr (float): Standard demension ratio (optional, defaults to 41)

property plate_n

The number of plates in the plate settlers.

property plate_l

The length of the plates in the plate settlers.

property l

The length of the entrance tank.