A Two-Stage Constructed Wetland Design Integrating Artificial Aeration and Sludge Mineralization for Municipal Wastewater Treatment

2021 ◽  
pp. 195-211
Author(s):  
Alexandros I. Stefanakis
Keyword(s):  
Wastewater Treatment ◽  
Constructed Wetland ◽  
Municipal Wastewater ◽  
Municipal Wastewater Treatment ◽  
Two Stage ◽  
Artificial Aeration ◽  
Wetland Design

Design and operation of an eco-system for municipal wastewater treatment and utilization

2006 ◽  
Vol 54 (11-12) ◽  
pp. 429-436 ◽  
Author(s):  
L. Wang ◽  
J. Peng ◽  
B. Wang ◽  
L. Yang
Keyword(s):  
Wastewater Treatment ◽  
Constructed Wetland ◽  
Municipal Wastewater ◽  
Activated Sludge Process ◽  
Municipal Wastewater Treatment ◽  
Annual Average ◽  
Total Capital ◽  
Dongying City ◽  
Final Effluent ◽  
Better Than

An eco-system consisting of integrated ponds and constructed wetland systems is employed in Dongying City, Shandong Province for the treatment and utilization of municipal wastewater with design capacity of 100,000 m3/d. The total capital cost of this system is 680 Yuan (RMB) or US$82/m3/d, or about half that of the conventional system based on activated sludge process, and the O/M cost is 0.1 Yuan (RMB) or US$ 0.012/m3, only one fifth that of conventional treatment systems. The performance of the wastewater treatment and utilization eco-system is quite good with a final effluent COD, BOD, SS, NH3-N and TP of 45–65 mg/l, 7–32 mg/l, 12–35 mg/l, 2–13 mg/l and 0.2–1.8 mg/l respectively and the annual average removals of COD, BOD, SS, NH3-N and TP are 69.1%, 78.3%, 76.4%, 62.1% and 52.9% respectively, which is much better than that of conventional pond system or constructed wetland used separately and illustrates that the artificial and integrated eco-system is more effective and efficient than the simple natural eco-system.

Potential use of mangrove plantation as constructed wetland for municipal wastewater treatment

2003 ◽  
Vol 48 (5) ◽  
pp. 257-266 ◽  
Author(s):  
K. Boonsong ◽  
S. Piyatiratitivorakul ◽  
P. Patanaponpaiboon
Keyword(s):  
Wastewater Treatment ◽  
Constructed Wetland ◽  
Municipal Wastewater ◽  
Free Water ◽  
Avicennia Marina ◽  
Pilot Scale ◽  
Natural Forest ◽  
Municipal Wastewater Treatment ◽  
Detention Time ◽  
Bruguiera Cylindrica

The study evaluated the possibility of using mangrove plantation to treat municipal wastewater. Two types of pilot scale (100 × 150 m2) free water surface constructed wetland were set up. One system was a natural Avicennia marina dominated forest system. The other system was a newly planted system in which seedlings of Rhizophora spp., A. marina, Bruguiera cylindrica and Ceriops tagal were planted in 4 strips. Municipal wastewater was retained within the systems for 7 and 3 days, respectively. The results indicated that the average removal percentage of TSS, BOD, NO3-N, NH4-N, TN, PO4-P and TP in the newly planted system were 27.6-77.1, 43.9-53.9, 37.6-47.5, 81.1-85.9, 44.8-54.4, 24.7-76.8 and 22.6-65.3, respectively. Whereas the removal percentage of those parameters in the natural forest system were 17.1-65.9, 49.5-51.1, 44.0-60.9, 51.1-83.5, 43.4-50.4, 28.7-58.9 and 28.3-48.0, respectively. Generally, the removal percentages within the newly planted system and the natural forest system were not significantly different. However, when the removal percentages were compared with detention time, TSS, PO4-P and TP percentages removed were significantly higher in the 7-day detention time treatment. Even though the removal percentages were highly varied and temporally dependent, the overall results showed that mangrove plantation could be used as constructed wetland for municipal wastewater treatment in a similar way to the natural mangrove system.

MUNICIPAL WASTEWATER TREATMENT IN AN ANAEROBIC DIGESTER‐CONSTRUCTED WETLAND SYSTEM

2008 ◽  
Vol 29 (11) ◽  
pp. 1249-1256 ◽  
Author(s):  
I. Ruiz ◽  
J. A. Álvarez ◽  
M. A. Díaz ◽  
L. Serrano ◽  
M. Soto
Keyword(s):  
Wastewater Treatment ◽  
Constructed Wetland ◽  
Municipal Wastewater ◽  
Anaerobic Digester ◽  
Municipal Wastewater Treatment ◽  
Wetland System

Upgrading of a two-stage treatment plant for nitrogen elimination

1994 ◽  
Vol 29 (12) ◽  
pp. 283-289
Author(s):  
O. Burica ◽  
R. Vodopivec ◽  
M. Stražar
Keyword(s):  
Wastewater Treatment ◽  
Municipal Wastewater ◽  
Low Cost ◽  
Treatment Plant ◽  
Municipal Wastewater Treatment ◽  
Treatment Facility ◽  
Two Stage ◽  
Effluent Quality ◽  
Nitrogen Elimination ◽  
Anaerobic Pretreatment

The paper describes the upgrading of an existing conventional two-stage municipal wastewater treatment plant for 200,000 PE to meet the EEC and Slovenian high effluent quality demands for nitrogen. The incoming wastewater is highly loaded with industrial waste and specifically with effluent from anaerobic pretreatment of piggery sludge. The low-cost concept of extensive wastewater treatment is based on integrating appropriate technologies into an existing treatment facility, preserving as much of the technical infrastructure as possible. The proposed concept uses a predenitrification system for the elimination of nitrogen.

scholarly journals Effect of the two-stage thermal disintegration and anaerobic digestion of sewage sludge on the COD fractions

2017 ◽  
Vol 19 (3) ◽  
pp. 130-135
Author(s):  
Anna Ciaciuch ◽  
Jerzy Gaca ◽  
Karolina Lelewer
Keyword(s):  
Organic Matter ◽  
Wastewater Treatment ◽  
Anaerobic Digestion ◽  
Sewage Sludge ◽  
Municipal Wastewater ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Municipal Wastewater Treatment ◽  
Soluble Organic Matter ◽  
Two Stage

Abstract The research presents the changes in chemical oxygen demand (COD) fractions during the two-stage thermal disintegration and anaerobic digestion (AD) of sewage sludge in municipal wastewater treatment plant (WWTP). Four COD fractions have been separated taking into account the solubility of substrates and their susceptibility to biodegradation: inert soluble organic matter SI, readily biodegradable substrate SS, slowly biodegradable substrates XS and inert particulate organic material XI. The results showed that readily biodegradable substrates SS (46.8% of total COD) and slowly biodegradable substrates XS (36.1% of total COD) were dominant in the raw sludge effluents. In sewage effluents after two-stage thermal disintegration, the percentage of SS fraction increased to 90% of total COD and percentage of XS fraction decreased to 8% of total COD. After AD, percentage of SS fraction in total COD decreased to 64%, whereas the percentage of other fractions in effluents increased.

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