Menu
Home
Log in / Register
 
Home arrow Health arrow Best practices for environmental health : environmental pollution, protection, quality and sustainability
Source

STATEMENT OF PROBLEM AND SPECIAL INFORMATION FOR LEACHATE COLLECTION SYSTEMS

(See endnote 94)

Of extreme importance in any of the hazardous waste management units is preventing contamination of the underlying groundwater by leachate. The primary function of the leachate collection and removal system is to ensure that leachate does not leave the system and the depth of the leachate above the liner is controlled. The primary function of the leak detection system is to make sure that the leachate has not escaped from the primary liner.

A leachate collection system consists of a drainage area, collection pipes, a removal system, and the protective filter layer underlain by a thick clay liner. The leachate is collected in the perforated pipe and moved upward by a sump pump through the filter layer of sand and geotextiles through vertical standpipes which extend through the liner to an external pumping station. All parts of the collection system must be constantly checked to prevent clogging.

The leachate may be pumped or hauled to a municipal sewage treatment facility. It should be pretreated with aeration, sedimentation, adjustment of pH, and removal of metals. The activated sludge process is typically used for pretreatment as well as carbon absorption and reverse osmosis.

Leachate collection system tests should be conducted by the contractor and then verified by an independent professional certified by the authorizing authority in this type of service. After the construction of this unit has been completed, it should be inspected closely for any potential damage and necessary corrections should be made.

Leak Detection System

(See endnote 94)

The leak detection system should cover both the bottom and side walls of the waste management area, collect any leakage through the primary layer, and move it to a sump pump within 24 hours. The system must be monitored regularly and if the volume of leachate is increasing, then it may be necessary to take further action based on the problem.

 
Source
Found a mistake? Please highlight the word and press Shift + Enter  
< Prev   CONTENTS   Next >
 
Subjects
Accounting
Business & Finance
Communication
Computer Science
Economics
Education
Engineering
Environment
Geography
Health
History
Language & Literature
Law
Management
Marketing
Mathematics
Political science
Philosophy
Psychology
Religion
Sociology
Travel