Standard Practice for
Performing Pressure In-Line Coagulation-FlocculationFiltration Test 1

This standard is issued under the fixed designation D 4188; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of the last revision. A number in parentheses indicates the year of thelast reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.

1. Scope

1.1 This practice covers the procedure used to perform
pressure in-line coagulation-flocculation-filtration of water and
waste water. It is applicable to water and waste water with
relatively low suspended solids (<30 mg/L). The practice is
applicable for any size filter greater than 100 mm (4 in.) in
diameter.

1.2 This practice can be used to determine the effectiveness
of flocculants or coagulants, or both, and filter medium(a) in
removing suspended and colloidal material from water and
waste water.

1.3 Interval between filter backwashing, backwash requirements, rinse requirements, and effect of filtration rate on
effluent quality can also be obtained with this practice.

1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

2. Referenced Documents

2.1 ASTM Standards: 2
D 1129 Terminology Relating to Water
D 1888 Test Methods for Particulate and Dissolved Matter,
Solids, or Residue in Water3
D 1889 Test Method for Turbidity of Water
D 2035 Practice for Coagulation-Flocculation Jar Test of
Water
D 3370 Practices for Sampling Water from Closed Conduits
D 4187 Test Methods for Zeta Potential of Colloids in
Water and Waste Water3

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