In situ septic tank effluent denitrification using a sulfur-limestone process

Tian C. Zhang, Jun Shan

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Septic tanks are the second largest source of groundwater nitrate contamination. In this study, the feasibility of coupling a conventional lateral field with a sulfur-limestone (S/L) layer to treat nitrate in septic tank effluent was investigated using column reactors to simulate the septic tank soil adsorption system. The effects of different hydraulic loading rates, nitrogen loading rates, depth of S/L layers, and ratio of S/L-to-gravel on reactor performance were investigated. The profiles of ammonium, nitrite, nitrate, sulfate, calcium, and other parameters along the depth of reactors were measured. Significant nitrification was observed in the sand layer, while significant denitrification was observed in the S/L layer. Sulfate and hardness were produced in accordance with stoichiometric relationships. The results demonstrate that the S/L method is very effective in denitrification, while production of sulfate and hardness and existence of sulfide in effluent may be limiting factors in its application.

Original languageEnglish (US)
Pages (from-to)1283-1291
Number of pages9
JournalWater Environment Research
Volume71
Issue number7
StatePublished - Jan 1 1999

Fingerprint

Septic tanks
Calcium Carbonate
Denitrification
Limestone
Sulfur
denitrification
Effluents
sulfur
limestone
effluent
Nitrates
sulfate
nitrate
Sulfates
hardness
Hardness
Calcium Sulfate
Nitrification
Sulfides
Gravel

Keywords

  • Denitrification
  • Groundwater
  • Nitrate
  • Septic tank
  • Sulfur-limestone

ASJC Scopus subject areas

  • Environmental Chemistry
  • Ecological Modeling
  • Water Science and Technology
  • Waste Management and Disposal
  • Pollution

Cite this

In situ septic tank effluent denitrification using a sulfur-limestone process. / Zhang, Tian C.; Shan, Jun.

In: Water Environment Research, Vol. 71, No. 7, 01.01.1999, p. 1283-1291.

Research output: Contribution to journalArticle

@article{0fb04acafb324d74b93932883a5fd4a9,
title = "In situ septic tank effluent denitrification using a sulfur-limestone process",
abstract = "Septic tanks are the second largest source of groundwater nitrate contamination. In this study, the feasibility of coupling a conventional lateral field with a sulfur-limestone (S/L) layer to treat nitrate in septic tank effluent was investigated using column reactors to simulate the septic tank soil adsorption system. The effects of different hydraulic loading rates, nitrogen loading rates, depth of S/L layers, and ratio of S/L-to-gravel on reactor performance were investigated. The profiles of ammonium, nitrite, nitrate, sulfate, calcium, and other parameters along the depth of reactors were measured. Significant nitrification was observed in the sand layer, while significant denitrification was observed in the S/L layer. Sulfate and hardness were produced in accordance with stoichiometric relationships. The results demonstrate that the S/L method is very effective in denitrification, while production of sulfate and hardness and existence of sulfide in effluent may be limiting factors in its application.",
keywords = "Denitrification, Groundwater, Nitrate, Septic tank, Sulfur-limestone",
author = "Zhang, {Tian C.} and Jun Shan",
year = "1999",
month = "1",
day = "1",
language = "English (US)",
volume = "71",
pages = "1283--1291",
journal = "Water environment research : a research publication of the Water Environment Federation",
issn = "1061-4303",
publisher = "Water Environment Federation",
number = "7",

}

TY - JOUR

T1 - In situ septic tank effluent denitrification using a sulfur-limestone process

AU - Zhang, Tian C.

AU - Shan, Jun

PY - 1999/1/1

Y1 - 1999/1/1

N2 - Septic tanks are the second largest source of groundwater nitrate contamination. In this study, the feasibility of coupling a conventional lateral field with a sulfur-limestone (S/L) layer to treat nitrate in septic tank effluent was investigated using column reactors to simulate the septic tank soil adsorption system. The effects of different hydraulic loading rates, nitrogen loading rates, depth of S/L layers, and ratio of S/L-to-gravel on reactor performance were investigated. The profiles of ammonium, nitrite, nitrate, sulfate, calcium, and other parameters along the depth of reactors were measured. Significant nitrification was observed in the sand layer, while significant denitrification was observed in the S/L layer. Sulfate and hardness were produced in accordance with stoichiometric relationships. The results demonstrate that the S/L method is very effective in denitrification, while production of sulfate and hardness and existence of sulfide in effluent may be limiting factors in its application.

AB - Septic tanks are the second largest source of groundwater nitrate contamination. In this study, the feasibility of coupling a conventional lateral field with a sulfur-limestone (S/L) layer to treat nitrate in septic tank effluent was investigated using column reactors to simulate the septic tank soil adsorption system. The effects of different hydraulic loading rates, nitrogen loading rates, depth of S/L layers, and ratio of S/L-to-gravel on reactor performance were investigated. The profiles of ammonium, nitrite, nitrate, sulfate, calcium, and other parameters along the depth of reactors were measured. Significant nitrification was observed in the sand layer, while significant denitrification was observed in the S/L layer. Sulfate and hardness were produced in accordance with stoichiometric relationships. The results demonstrate that the S/L method is very effective in denitrification, while production of sulfate and hardness and existence of sulfide in effluent may be limiting factors in its application.

KW - Denitrification

KW - Groundwater

KW - Nitrate

KW - Septic tank

KW - Sulfur-limestone

UR - http://www.scopus.com/inward/record.url?scp=0032785906&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0032785906&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0032785906

VL - 71

SP - 1283

EP - 1291

JO - Water environment research : a research publication of the Water Environment Federation

JF - Water environment research : a research publication of the Water Environment Federation

SN - 1061-4303

IS - 7

ER -