CONSTRUCTED WETLANDS FOR TREATMENT OF SWINE WASTEWATER FROM AN ANAEROBIC LAGOON

2002 ◽  
Vol 45 (3) ◽  
Author(s):  
P. G. Hunt ◽  
A. A. Szögi ◽  
F. J. Humenik ◽  
J. M. Rice ◽  
T. A. Matheny ◽  
...  
Keyword(s):  
Constructed Wetlands ◽  
Swine Wastewater ◽  
Anaerobic Lagoon

Effect of polyaluminium chloride on phosphorus removal in constructed wetlands treated with swine wastewater

2011 ◽  
Vol 63 (12) ◽  
pp. 2938-2943 ◽  
Author(s):  
G. B. Reddy ◽  
Dean A. Forbes ◽  
P. G. Hunt ◽  
Johnsely S. Cyrus
Keyword(s):  
Constructed Wetlands ◽  
Constructed Wetland ◽  
Typha Latifolia ◽  
Swine Wastewater ◽  
Treatment Efficiency ◽  
Anaerobic Lagoon ◽  
High Concentrations ◽  
Continuous Injection ◽  
Polyaluminium Chloride ◽  
P Removal

Total phosphorus (TP) removal in aged constructed wetlands poses a challenge, especially when treated with swine wastewater with high concentrations of phosphorus (P). Our earlier studies with anaerobic lagoon swine wastewater treatment in constructed wetlands showed a decline in P removal (45–22%) with increased years of operation. These particular wetlands have been treated with swine wastewater every year since the first application in 1997. Preliminary lab-scale studies were conducted to evaluate the efficiency of polyaluminium chloride (PAC) in the removal of phosphate-P (PO4-P) from swine wastewater. The experimental objective was to increase the phosphorus treatment efficiency in constructed wetland by adding PAC as a precipitating agent. PAC was added by continuous injection to each wetland system at a rate of 3 L day−1 (1:5 dilution of concentrated PAC). Swine wastewater was added from an anaerobic lagoon to four constructed wetland cells (11m wide x 40m long) at TP loads of 5.4–6.1 kg ha−1day−1 in two experimental periods, September to November of 2008 and 2009. Treatment efficiency of two wetland systems: marsh-pond-marsh (M-P-M) and continuous marsh (CM) was compared. The wetlands were planted with cattails (Typha latifolia L.) and bulrushes (Scirpus americanus). In 2008, PAC treatment showed an increase of 27.5 and 40.8% of TP removal over control in M-P-M and CM respectively. Similar trend was also observed in the following year. PAC as a flocculant and precipitating agent showed potential to enhance TP removal in constructed wetlands treated with swine wastewater.

Microbial indicator reductions in alternative treatment systems for swine wastewater

1998 ◽  
Vol 38 (12) ◽  
pp. 119-122 ◽  
Author(s):  
V. R. Hill ◽  
M. D. Sobsey
Keyword(s):  
Constructed Wetlands ◽  
Municipal Wastewater ◽  
Overland Flow ◽  
Geometric Mean ◽  
Swine Wastewater ◽  
Health Concern ◽  
Secondary Treatment ◽  
Treatment Processes ◽  
Anaerobic Lagoon ◽  
Parasitic Pathogens

Bacterial, viral and parasitic pathogens in swine wastes are of public health concern because many are able to infect humans. Hence, treatment processes must be effective in removing or destroying these microbes before wastewater discharge. Primary treatment by anaerobic lagoon is the current best management practice (BMP) for swine wastewater in the USA but alternative processes were also investigated for their potential to improve treatment. Wastewater samples were collected approximately monthly from March-December 1997 at a North Carolina swine nursery. Geometric mean concentrations for bacterial indicators (faecal coliforms, E coli, enterococci and C perfringens spores) in lagoon effluent were 3.3×105, 2.8×105, 3.4×105 and 2.2×104 CFU/100mL respectively. For somatic and male-specific coliphages they were 1.4×105 and 5.0×103 PFU/100mL respectively. Bacterial indicator levels in swine lagoon effluents are much higher than allowed for municipal wastewater effluents discharged to land or water. The anaerobic lagoon achieved reductions of 1.1–2.2 log10 for all indicators except C perfringens spores (0.2 log10). Of the secondary treatment processes, constructed wetlands achieved the best indicator microbe reductions ranging from 1.1–2.5 log10. A media filter and an overland flow system achieved mean indicator reductions of only 0.2–1.2 and 0.2–0.8 log10, respectively. The results indicate that a primary-secondary treatment system, an anaerobic lagoon and constructed wetlands, can achieve reductions of 2.9–4.8 log10 for bacterial and viral indicators and 1.5 log10 for C perfringens spores.

Kinetics and Removal Efficiency of Nitrogen in Constructed Wetlands Cultivated with Different Plant Species for Treating Swine Wastewater Applied at Different Rates

2021 ◽  
Vol 232 (1) ◽  
Author(s):  
Fátima Resende Luiz Fia ◽  
Antonio Teixeira de Matos ◽  
Ronaldo Fia ◽  
Mateus Pimentel de Matos ◽  
Alisson Carraro Borges ◽  
...  
Keyword(s):  
Plant Species ◽  
Removal Efficiency ◽  
Constructed Wetlands ◽  
Swine Wastewater

Treating swine wastewater by integrating earthworms into constructed wetlands

2011 ◽  
Vol 46 (7) ◽  
pp. 800-804 ◽  
Author(s):  
Chackrit Nuengjamnong ◽  
Nathasith Chiarawatchai ◽  
Chongrak Polprasert ◽  
Ralf Otterpohl
Keyword(s):  
Constructed Wetlands ◽  
Swine Wastewater

Denitrification in Constructed Wetlands Used for Treatment of Swine Wastewater

2003 ◽  
Vol 32 (2) ◽  
pp. 727 ◽  
Author(s):  
Patrick G. Hunt ◽  
Terry A. Matheny ◽  
Ariel A. Szögi
Keyword(s):  
Constructed Wetlands ◽  
Swine Wastewater

OPERATIONAL COMPONENTS AND DESIGN OF CONSTRUCTED WETLANDS USED FOR TREATMENT OF SWINE WASTEWATER

2013 ◽  
Author(s):  
P. G. Hunt ◽  
M. E. Poach ◽  
A. A. Szogi ◽  
G. B. Reddy ◽  
K. C. Stone ◽  
...  
Keyword(s):  
Constructed Wetlands ◽  
Swine Wastewater

Fate of antibiotics from swine wastewater in constructed wetlands with different flow configurations

2019 ◽  
Vol 140 ◽  
pp. 119-125 ◽  
Author(s):  
Lin Liu ◽  
Jie Li ◽  
Hongyong Fan ◽  
Xu Huang ◽  
Lili Wei ◽  
...  
Keyword(s):  
Constructed Wetlands ◽  
Swine Wastewater ◽  
Flow Configurations
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