Septic water treatment method for removing carbonaceous and nitrogenous compounds

Patent metadata

Field	Value
Publication number	US-11981591-B2
Application number	US-202318362345-A
Country	US
Kind code	B2
Filing date	Jul 31, 2023
Priority date	Sep 11, 2019
Publication date	May 14, 2024
Grant date	May 14, 2024

Abstract

Water treatment structures may have at least a first geotextile fabric layer; a second geotextile fabric layer; a third geotextile fabric layer; a first filler layer with plastic particles, arranged between the first and second geotextile fabric layers; and a second filler layer with plastic particles, arranged between the second and third geotextile fabric layers, wherein the geotextile fabric layers and the filler layers are within a housing, and wherein the structure is configured such that contaminated water proceeds sequentially through the first geotextile fabric layer, the first filler layer, the second geotextile fabric layer, the second filler layer, and the third geotextile fabric layer. Methods of treating wastewater may involve passing wastewater, after optional oxygenating and pre-filtering, through such alternating layers of geotextile, preferably nonwoven, and polymer particles.

First claim

The invention claimed is:

1. A septic water treatment method for removing a carbonaceous and/or nitrogenous compound from contaminated water, comprising:
allowing the contaminated water to settle;
removing oil and grease from the surface of the contaminated water with an adsorptive material; and
aerating the contaminated water to form a pre-treated water;
passing the pre-treated water through a water treatment system to obtain an effluent having a reduced content of the carbonaceous and/or nitrogenous compound relative to the contaminated water;
wherein the water treatment system comprises:
a waste water treatment structure,
a discharge tank downstream and in fluid communication with the waste water treatment structure;
wherein the waste water treatment structure comprises
a first geotextile fabric layer;
a second geotextile fabric layer;
a third geotextile fabric layer;
a first filler layer comprising plastic particles, arranged between the first and second geotextile fabric layers; and
a second filler layer comprising plastic particles, arranged between the second and third geotextile fabric layers, and
an aeration tank under the first second and third fabric layers and the first and second filler layers,
wherein the first, second, and/or third geotextile fabric layer comprises at least 75 wt. %, relative to total fabric layer weight, of a nonwoven fabric comprising at least 75 wt. %, relative to total nonwoven fabric weight, of polypropylene or polyethylene terephthalate,
wherein the aeration tank, geotextile fabric layers and the filler layers are vertically stacked within a housing, and
wherein the waste water treatment structure is configured such that contaminated water proceeds sequentially through the aeration tank, the first geotextile fabric layer, the first filler layer, the second geotextile fabric layer, the second filler layer, and the third geotextile fabric layer.

2. The method of claim 1 , wherein the water treatment system further comprises:
a fourth geotextile fabric layer; and
a third filler layer comprising plastic particles, arranged between the third and fourth geotextile fabric layers.

3. The method of claim 1 , wherein the first, second, and/or third geotextile fabric layer of the water treatment structure, independently has a thickness in a range of from 1 to 10 mm.

Assignees

• Univ Imam Abdulrahman Bin Faisal

Inventors

• Yaman Cevat
• Aga Omer

Classifications

• C02F3/04 Primary

  using trickle filters · CPC title

• C02F1/40

  Devices for separating or removing fatty or oily substances or similar floating material (cleaning or keeping clear the surface of open water from oil or like materials E02B15/04; devices in sewers for separating liquid or solid substances from sewage E03F5/14, e.g. for use in drains leading to the sewer E03F5/16) · CPC title

• C02F3/101

  Arranged-type packing, e.g. stacks, arrays · CPC title

• C02F3/103

  Textile-type packing · CPC title

• C02F3/104

  Granular carriers · CPC title