+ Site Statistics
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on LinkedInFollow on LinkedIn

+ Translate

Nitrogen mass balance across pilot-scale algae and duckweed-based wastewater stabilisation ponds

Nitrogen mass balance across pilot-scale algae and duckweed-based wastewater stabilisation ponds

Water Research 38(4): 913-920

Nitrogen removal processes and nitrogen mass balances in algae-based ponds (ABPs) and duckweed (Lemna gibba)-based ponds (DBPs) were assessed during periods of 4 months, each under different operational conditions. During periods 1 and 2, the effect of cold and warm temperature was studied. During periods 2 and 3, the effect of low- and high-system organic loading (OL) was studied in warm seasons operation. The pilot-scale systems consisted of four similar ponds in series fed with domestic sewage with hydraulic retention time of 7 days in each pond. Overall nitrogen removal was higher during warm temperature in both ABPs and DBPs, but similar during periods 2 and 3. Nitrogen removal in DBPs was lower than in ABPs by 20%, 12% and 8% during cold temperature, warm temperature and high-OL periods, respectively. Depending on temperature and OL rate, ABPs showed higher nitrogen removal via sedimentation (46-245% higher) compared to DBPs. Also, ABPs also showed higher nitrogen removal via denitrification (7-37% higher) compared to DBPs. Ammonia volatilisation in both systems did not exceed 1.1% of influent total nitrogen during the entire experimental period. N uptake by duckweed corresponds to 30% of the influent nitrogen during warm/low OL period and decreased to 10% and 19% during the cold and warm/high OL period, respectively. Predictive models for nitrogen removal presented a good reflection of nitrogen fluxes on overall nitrogen balance under the prevailing experimental conditions.

(PDF emailed within 0-6 h: $19.90)

Accession: 004249539

Download citation: RISBibTeXText

PMID: 14769411

DOI: 10.1016/j.watres.2003.10.044

Related references

Comparison of ammonia volatilisation rates in algae and duckweed-based waste stabilisation ponds treating domestic wastewater. Water Research 37(19): 4587-4594, 2003

Effect of organic surface load on process performance of pilot-scale algae and duckweed-based waste stabilization ponds. Journal of Environmental Engineering 131(4): 587-594, 2005

Microbial community and removal of nitrogen via the addition of a carrier in a pilot-scale duckweed-based wastewater treatment system. Bioresource Technology 179: 549-558, 2015

Relative performance of duckweed ponds and rock filtration as advanced in-pond wastewater treatment processes for upgrading waste stabilisation pond effluent: a pilot study. Water Science and Technology 55(11): 111-119, 2007

The effect of pH on enterococci removal in Pistia-, duckweed- and algae-based stabilization ponds for domestic wastewater treatment. Water Science and Technology 45(1): 67-74, 2002

Comparison between algae-based and duckweed-based wastewater treatment: Differences in environmental conditions and nitrogen transformations. Water Science and Technology 42(10-11): 215-222, 2000

Nitrogen transformations and removal mechanisms in algal and duckweed waste stabilisation ponds. Nitrogen transformations and removal mechanisms in algal and duckweed waste stabilisation ponds : iii + 133 pp., 2003

Research on waste stabilisation ponds in the United Kingdom--initial results from pilot-scale facultative ponds. Water Science and Technology 48(2): 1-7, 2003

Effects of operation parameters on nutrient removal from wastewater and high-protein biomass production in a duckweed-based (Lemma aequinoctialis) pilot-scale system. Water Science and Technology 70(7): 1195-1204, 2014

The effect of aeration and effluent recycling on domestic wastewater treatment in a pilot-plant system of duckweed ponds. Water Science and Technology 69(2): 350-357, 2014

Nitrogen mass balances for pilot-scale biofilm stabilization ponds under tropical conditions. Bioresource Technology 102(4): 3754-3760, 2011

Toxicity of heavy metals to duckweed-based wastewater treatment ponds with different depth. Management of Environmental Quality 17(3): 313-322, 2006

The effects of nutrient limitation (nitrogen and phosphorus) on BOD removal from post-coagulated Pinus radiata sulfite pulp and paper mill wastewater in a baffled aerated stabilisation basin-laboratory pilot scale study. Water Science and Technology 63(3): 491-501, 2011

Process performance assessment of algae-based and duckweed-based wastewater treatment systems. Water Science and Technology 45(1): 91-101, 2002

The evaluation of Euglena gracilis, duckweed, and mixed algae as a nitrogen and phosphorus sink for wastewater treatment. AAAS Annual Meeting & Science Innovation Exposition 163(0): A114, 1997