Ozonation effects for excess sludge reduction on bacterial communities composition in a full-scale activated sludge plant for domestic wastewater treatment

2014 ◽  
Vol 35 (12) ◽  
pp. 1462-1469 ◽  
Author(s):  
C. Chiellini ◽  
R. Gori ◽  
A. Tiezzi ◽  
L. Brusetti ◽  
S. Pucciarelli ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Bacterial Communities ◽  
Domestic Wastewater ◽  
Full Scale ◽  
Sludge Reduction ◽  
Excess Sludge ◽  
Domestic Wastewater Treatment ◽  
Excess Sludge Reduction

scholarly journals Nutrient Removal Performance on Domestic Wastewater Treatment Plants (Full Scale System) between Tropical Humid and Cold Climates

2018 ◽  
pp. 32-39
Author(s):  
Pongsak Noophan ◽  
Rawiwan Rodpho ◽  
Pimook Sonmee ◽  
Martha Hahn ◽  
Suthep Sirivitayaphakorn
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Nutrient Removal ◽  
Wastewater Treatment Plants ◽  
Domestic Wastewater ◽  
Full Scale ◽  
Biological Nutrient Removal ◽  
Cold Climates ◽  
Domestic Wastewater Treatment ◽  
Warm Climates

Two full scale systems of oxidation ditches for domestic wastewater treatment plants (WWTP) were used as study sites: Phuket Province, southern Thailand (representative of tropical humid climates) and Plum Creek, Castle Rock, Colorado, USA (representative of cold climates). The treatment systems at both sites were designed for biological nutrient removal (BNR) fromextended activated sludge. Nitrogen is removed by nitrification-denitrification processes. The solid retention time (SRT) for both treatment plants was ≥ 10 das recommended by theory for complete nitrification in activated sludge wastewater treatment plants. Influents and effluents from these sites were compared in respect to flow rate, biochemical oxygen demand (BOD), organic nitrogen, ammonium, nitrate, total nitrogen, and phosphorus concentrations. At both sites, nutrient removal reached more than 75% because there was sufficient carbon for denitrifying and phosphate accumulating organisms. Furthermore, low dissolved oxygen concentration, long SRT, and hightemperature could be key factors to promote activity of some groups of bacteria in consuming organic matter and nutrients in wastewater in warm climates. For this reason, plant design and operating procedures for wastewater treatment in cold climates might not be always be applicable to warm climates.

scholarly journals Performance of Four Full-Scale Artificially Aerated Horizontal Flow Constructed Wetlands for Domestic Wastewater Treatment

Water ◽  
2016 ◽  
Vol 8 (9) ◽  
pp. 365 ◽  
Author(s):  
Eleanor Butterworth ◽  
Andrew Richards ◽  
Mark Jones ◽  
Gabriella Mansi ◽  
Ezio Ranieri ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Constructed Wetlands ◽  
Domestic Wastewater ◽  
Full Scale ◽  
Horizontal Flow ◽  
Domestic Wastewater Treatment

scholarly journals A Novel Bio-Eco Technology Combined System for Rural Domestic Wastewater Treatment in a Tourism Area: A Full-Scale Study

2009 ◽  
Vol 26 (9) ◽  
pp. 1419-1427 ◽  
Author(s):  
Hanwen Liang ◽  
Junxin Liu ◽  
Xuesong Guo ◽  
Baoqing Shan ◽  
Jingzhu Zhao ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Domestic Wastewater ◽  
Full Scale ◽  
Combined System ◽  
Domestic Wastewater Treatment

Full scale fluidized bed anaerobic reactor for domestic wastewater treatment: performance, sludge production and biofilm

2004 ◽  
Vol 49 (11-12) ◽  
pp. 319-325 ◽  
Author(s):  
N.M. Mendonça ◽  
C.L. Niciura ◽  
E.P. Gianotti ◽  
J.R. Campos
Keyword(s):  
Wastewater Treatment ◽  
Fluidized Bed ◽  
Methanogenic Archaea ◽  
Domestic Wastewater ◽  
Full Scale ◽  
Anaerobic Reactor ◽  
Sulfate Reducing ◽  
Domestic Wastewater Treatment ◽  
The Difference ◽  
Sludge Production

This paper describes the performance, sludge production and biofilm characteristics of a full scale fluidized bed anaerobic reactor (32 m3) for domestic wastewater treatment. The reactor was operated with 10.5 m.h-1 upflow velocity, 3.2 h hydraulic retention time, and recirculation ratio of 0.85 and it presented removal efficiencies of 71 ± 8% of COD and 77 ± 14% of TSS. During the apparent steady-state period, specific sludge production and sludge age in the reactor were (0.116 ± 0.033) kgVSS. kgCOD-1 and (12 ± 5)d, respectively. Biofilm formed in the reactor presented two different patterns: one of them at the beginning of the colonization and the other of mature biofilm. These different colonization patterns are due to bed stratification in the reactor, caused by the difference in local-energy dissipation rates along the reactor's height, and density, shape, etc. of the bioparticles. The biofilm population is formed mainly of syntrophic consortia among sulfate reducing bacteria, methanogenic archaea such as Methanobacterium and Methanosaeta-like cells.

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