Method and system for the remediation of contaminated earth from hazardous substances in a batch-wise ex-situ on-site manner

Patent metadata

Field	Value
Publication number	US-11040383-B2
Application number	US-201815974400-A
Country	US
Kind code	B2
Filing date	May 8, 2018
Priority date	Sep 6, 2010
Publication date	Jun 22, 2021
Grant date	Jun 22, 2021

Abstract

A system is disclosed for remediation of contaminated earth from hazardous substances, comprising mobile equipment that are generally available. The mobile equipment are physically separate and temporarily organised at a location in the proximity of a contaminated site when the need arises and are dispersed or disposed of following remediation of the contaminated site. The generally available mobile equipment may include earth moving excavators, truck mixers equipped with tumblers used for mixing and delivering cement-concrete to the construction site, and centrifuges.

First claim

What is claimed is:

1. A system that is not a dedicated one but a temporarily organised one for remediation of contaminated earth from hazardous substances,
said system comprising
mobile equipment that are generally available, comprising:
(a) at least one mobile earth moving equipment ( 10 );
(b) at least one mobile tumbler reactor ( 20 ); and
(c) at least one liquid-solid separator ( 30 );
wherein
the system is operable for remediating contaminated earth from hazardous substances in a batch-wise manner:
for collecting batch by batch contaminated earth portions from a contaminated site in the at least one mobile earth moving equipment, transporting the contaminated earth portions to a location and transferring the contaminated earth portions to the at least one mobile tumbler reactor,
for dosing the contaminated earth portions in the at least one mobile tumbler reactor with cleaning agents and water; and
for washing portions of the contaminated earth in the at least one mobile tumbler reactor under agitation or tumbling;

wherein the mobile equipment are physically separate and temporarily organised at a location in the proximity of a contaminated site when the need arises to be dispersed or disposed of following remediation of the contaminated site.

2. The system of claim 1 for remediation of contaminated earth from hazardous substances, further comprising
a controller for controlling logistics of operations of the at least one mobile earth moving equipment, at least one mobile tumbler reactor and at least one liquid-solid separator, wherein
the at least one mobile earth moving equipment is operable to collect batch by batch the portions of contaminated earth from the contaminated site, to transport the contaminated earth portions to the location, to transfer the contaminated earth portions to the at least one mobile tumbler reactor, to receive cleaned earth portions from the at least one liquid-solid separator and to transport the cleaned earth portions back to the contaminated site and to deposit the cleaned earth portions at the contaminated site until the entire contaminated site is suitably remediated;
the at least one mobile tumbler reactor is operable to dose contaminated earth portions with cleaning agents and water for washing under agitation or tumbling and for transferring a mixture of cleaned earth portions and wash water with cleaning agents into the at least one liquid-solid separator; and
the at least one liquid-solid separator is operable to separate the wash water with cleaning agents from the cleaned earth portions and to transfer the cleaned earth portions into the at least one mobile earth moving equipment.

3. The system as claimed in claim 2 , wherein the controller is a logic circuit or process or configured and programmed for automatically controlling the logistics of operations of the at least one mobile earth moving equipment, at least one mobile tumbler reactor and at least one liquid-solid separator.

4. The system as claimed in claim 2 , wherein the controller is manually controllable or partly manually controllable and partly automatically controllable.

5. The system as claimed in claim 1 , wherein the at least one liquid-solid separator is mobile or stationary.

Assignees

• Indian Inst Technology Bombay

Inventors

• Asolekar Shyam Ramchandra

Classifications

• B09C1/00 Primary

  Reclamation of contaminated soil · CPC title

• B09C1/08 Primary

  chemically · CPC title

• B09C1/02

  Extraction using liquids, e.g. washing, leaching {, flotation} · CPC title