Device for purifying cropland effluents

Patent metadata

Field	Value
Publication number	US-10196288-B2
Application number	US-201615358107-A
Country	US
Kind code	B2
Filing date	Nov 21, 2016
Priority date	May 21, 2014
Publication date	Feb 5, 2019
Grant date	Feb 5, 2019

Abstract

A device for purifying first-stage drainage effluents from dry croplands, the device including: a) a plastic corrugated pipe including an upright segment and a horizontal segment, the upright segment comprising plastic mesh openings; b) a steel wire mesh box filled with stuffing pellets including biological carriers; and an inspection cover. The plastic mesh openings are disposed at one end of the upright segment, the other end of the upright segment is connected to one end of the horizontal segment, and the other end of the horizontal segment is connected to the steel wire mesh box. The upper surface of the upright segment of the plastic corrugated pipe is lower than the upper surface of the field ditch, and the lower edge of the plastic mesh openings is higher than the bottom surface of the field ditch.

First claim

The invention claimed is:

1. A device for purifying effluents from dry croplands, the device comprising:
a) a plastic corrugated pipe comprising an upright segment and a horizontal segment, the upright segment comprising plastic mesh openings;
b) a steel wire mesh box filled with stuffing pellets comprising biological carriers; and
c) an inspection cover;

wherein
the upright segment is connected to a tail end of a field ditch;
the plastic mesh openings are disposed at one end of the upright segment, the other end of the upright segment is connected to one end of the horizontal segment, and the other end of the horizontal segment is connected to the steel wire mesh box;
the upright segment and the horizontal segment form an included angle of 95 degrees;
an upper surface of the upright segment of the plastic corrugated pipe is lower than an upper surface of the field ditch, and a lower edge of the plastic mesh openings is higher than the bottom surface of the field ditch;
the horizontal segment communicates with an external ditch via the steel wire mesh box;
the steel wire mesh box is surrounded by gravel; and
the inspection cover is disposed at one end of the upright segment in the vicinity of the plastic mesh openings.

2. The device of claim 1 , wherein the plastic corrugated pipe has a diameter of 20 cm, 30 cm, or 40 cm; a joint of the upright segment and the horizontal segment of the plastic corrugated pipe is 20 cm lower than the bottom surface of the field ditch; and the horizontal segment of the plastic corrugated pipe is inclined downwards by 5 degrees and communicates with the external ditch.

3. The device of claim 1 , wherein the plastic mesh openings are arranged in an upper part of the upright segment of the plastic corrugated pipe and each is a 1 cm×1 cm rectangle; the lower edge of the plastic mesh openings is 15 cm higher than the bottom surface of the field ditch; the plastic corrugated pipe is 30 cm in diameter; the upper surface of the upright segment of the plastic corrugated pipe is 5 cm lower than the upper surface of the field ditch; the steel wire mesh box is openable, and has a dimension size of 50 cm×40 cm×40 cm or 60 cm×50 cm×50 cm; the inspection cover is conical, and a bottom diameter of the inspection cover is larger than the diameter of the plastic corrugated pipe.

4. The device of claim 1 , wherein the stuffing pellets comprise a polyolefin framework made of polyolefin plastic and biological carriers comprising polyurethane, and have a diameter of 6 cm.

Assignees

• Univ Hohai

Inventors

• Wang Peifang
• Wang Chao
• Qian Jin
• Hou Jun
• Rao Lei
• Bao Ziyun

Classifications

• C02F2101/105

  Phosphorus compounds · CPC title

• B01D39/2068

  Other inorganic materials, e.g. ceramics · CPC title

• C02F2303/24

  Separation of coarse particles, e.g. by using sieves or screens · CPC title

• C02F2101/306

  Pesticides · CPC title

• C02F2103/06

  Contaminated groundwater or leachate · CPC title