The influence of changes in groundwater composition on the efficiency of manganese and ammonia nitrogen removal on mature quartz sand filtering beds

The results of investigations of natural groundwater treatment containing increased manganese and ammonia nitrogen concentrations are presented. The main aim of the work was to show the influence of changes in water composition on manganese and ammonia nitrogen removal from groundwater on second-sta...

Full description

Saved in:
Bibliographic Details
Published in:Water science & technology. Water supply 2001-01, Vol.1 (2), p.91-98
Main Authors: Bray, R, Olanczuk-Neyman, K
Format: Article
Language:English
Subjects:
Ammonia
Bacteria
Composition
Dissolved oxygen
Efficiency
Environmental engineering
Filtrate
Groundwater
Groundwater treatment
Manganese
Nitrification
Nitrifying bacteria
Nitrogen
Nitrogen removal
Oxygen
Phosphates
Quartz
Removal
Sand
Sand filters
Substrates
Water purification
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The results of investigations of natural groundwater treatment containing increased manganese and ammonia nitrogen concentrations are presented. The main aim of the work was to show the influence of changes in water composition on manganese and ammonia nitrogen removal from groundwater on second-stage mature quartz sand filters. According to the results obtained, the efficiency of manganese elimination from water did not depend on periodic changes in ammonia nitrogen or dissolved oxygen concentrations. However, if low oxygen concentrations (lower than 2 mg/dm super(3)) were maintained for a longer time, the manganese concentration in the filtrate gradually increased. The ammonia nitrogen concentration in the filtered water appeared to be the most relevant factor affecting the efficient removal of manganese and the dissolved oxygen concentration was less important. The nitrification process appeared to be vulnerable to changes in the concentrations of the substrates: ammonia nitrogen (either an increase or decrease) and oxygen (an decrease). It was observed that it is necessary for nitrifying bacteria to adapt (lag phase) to rapidly changing water composition. Due to the sorption process, the inhibition of nitrification on the filtering beds did not significantly influence the efficiency of ammonia nitrogen removal.
ISSN:1606-9749
1607-0798
DOI:10.2166/ws.2001.0025