Enhanced performance of pilot-scale hybrid constructed wetlands with A/O reactor in raw domestic sewage treatment

2020 ◽  
Vol 258 ◽  
pp. 110026
Author(s):  
Chunhui Xiong ◽  
Nora Fungyee Tam ◽  
Yunv Dai ◽  
Xiaomeng Zhang ◽  
Rui Li ◽  
...  
Keyword(s):  
Constructed Wetlands ◽  
Sewage Treatment ◽  
Pilot Scale ◽  
Domestic Sewage

Domestic sewage treatment in a pilot-scale anaerobic sequencing batch biofilm reactor (ASBBR)

2007 ◽  
Vol 51 (1) ◽  
pp. 237-247 ◽  
Author(s):  
Arnaldo Sarti ◽  
Marcelo Loureiro Garcia ◽  
Marcelo Zaiat ◽  
Eugenio Foresti
Keyword(s):  
Sewage Treatment ◽  
Pilot Scale ◽  
Domestic Sewage ◽  
Biofilm Reactor ◽  
Sequencing Batch Biofilm Reactor

Microbial community in a pilot-scale bioreactor promoting anaerobic digestion and sulfur-driven denitrification for domestic sewage treatment

2015 ◽  
Vol 39 (2) ◽  
pp. 341-352 ◽  
Author(s):  
Flávia Talarico Saia ◽  
Theo S. O. Souza ◽  
Rubens Tadeu Delgado Duarte ◽  
Eloisa Pozzi ◽  
Débora Fonseca ◽  
...  
Keyword(s):  
Microbial Community ◽  
Anaerobic Digestion ◽  
Sewage Treatment ◽  
Pilot Scale ◽  
Domestic Sewage

Performance of a pilot-scale constructed wetland for stormwater runoff and domestic sewage treatment on the banks of a polluted urban river

2014 ◽  
Vol 69 (7) ◽  
pp. 1410-1418 ◽  
Author(s):  
Weijie Guo ◽  
Zhu Li ◽  
Shuiping Cheng ◽  
Wei Liang ◽  
Feng He ◽  
...  
Keyword(s):  
Constructed Wetland ◽  
Sewage Treatment ◽  
Stormwater Runoff ◽  
Oxygen Demand ◽  
Pilot Scale ◽  
Domestic Sewage ◽  
Nitrogen And Phosphorus ◽  
Effective Technique ◽  
Integrated Constructed Wetland ◽  
One Year

To examine the performance of a constructed wetland system on stormwater runoff and domestic sewage (SRS) treatment in central east China, two parallel pilot-scale integrated constructed wetland (ICW) systems were operated for one year. Each ICW consisted of a down-flow bed, an up-flow bed and a horizontal subsurface flow bed. The average removal rates of chemical oxygen demand (CODCr), total suspended solids (TSS), ammonia (NH4+-N), total nitrogen (TN) and total phosphorus (TP) were 63.6, 91.9, 38.7, 43.0 and 70.0%, respectively, and the corresponding amounts of pollutant retention were approximately 368.3, 284.9, 23.2, 44.6 and 5.9 g m−2 yr−1, respectively. High hydraulic loading rate (HLR) of 200 mm/d and low water temperatures (<15 °C) resulted in significant decrease in removals for TP and NH4+-N, but had no significant effects on removals of COD and TSS. These results indicated that the operation of this ICW at higher HLR (200 mm/d) might be effective and feasible for TSS and COD removal, but for acceptable removal efficiencies of nitrogen and phosphorus it should be operated at lower HLR (100 mm/d). This kind of ICW could be employed as an effective technique for SRS treatment.

The Microbiology Associated with Glycol Removal in Constructed Wetlands

1999 ◽  
Vol 40 (3) ◽  
pp. 99-107 ◽  
Author(s):  
S. Chong ◽  
H. Garelick ◽  
D. M. Revitt ◽  
R. B. E. Shutes ◽  
P. Worrall ◽  
...  
Keyword(s):  
Constructed Wetlands ◽  
Sewage Treatment ◽  
Dry Weight ◽  
Pilot Scale ◽  
Surface Flow ◽  
Alternative Methods ◽  
Surface System ◽  
Receiving Waters ◽  
Removal Efficiencies ◽  
Microbial Groups

During the winter months, the application of large quantities of glycol based anti- and de-icers to aircraft and runways poses a serious threat to receiving waters because of their toxicity and BOD effect. The orthodox approach has been to store runoff waters in aerated lagoons before discharge to receiving waters or to sewage treatment works. In the development of a pollution control strategy for Heathrow Airport Ltd. (HAL), a combination of alternative methods for treatment are being considered, and amongst these is the use of constructed wetlands on a pilot scale. Results from this study indicate that most constructed wetland plants and substrate micro-organism populations throughout the beds are not adversely affected by airport runoff or exposure to shock-loads of glycols at initial total concentrations of 1180mg/1 and 632mg/1 in the subsurface and surface flow reedbeds respectively. Apart from Typha spp, the aquatic macrophytes have adapted well to the exposure to airport runoff. Glycol removal efficiencies have improved as the beds have matured, and average removal efficiencies of 78% for the sub-surface system and 54% for the surface system have been recorded. Complimentary monitoring of substrate micro-organism populations prior to and after glycol dosings have shown that aerobic microbial groups of bacteria, fungi and actinomyctes, are present in higher numbers (105−107 CFU/g substrate dry weight) than their anaerobic counterparts (103−105 CFU/g substrate dry weight). In the laboratory, studies have shown fungi and bacteria to be most tolerant of glycol, with several strains able to utilise these compounds.

Nutrients removal mechanisms in high rate algal pond treating rural domestic sewage in East China

2006 ◽  
Vol 6 (6) ◽  
pp. 43-50 ◽  
Author(s):  
Q. Zhou ◽  
S.L. He ◽  
X.J. He ◽  
X.F. Huang ◽  
B. Picot ◽  
...  
Keyword(s):  
Ammonia Volatilization ◽  
Sewage Treatment ◽  
Chemical Precipitation ◽  
Pilot Scale ◽  
Domestic Sewage ◽  
High Rate ◽  
East China ◽  
Septic Tank ◽  
Nitrogen And Phosphorus ◽  
N Removal

This study focused on the evaluation of performance and mechanisms of a high-rate algal pond system (HRAP System) in nitrogen and phosphorus removal for rural domestic sewage treatment. A pilot scale HRAP System was located at Yangzhu Village, Jiangsu Province, east China, with treatment processes including a septic tank, two stages of HRAPs and an aquatic pond. Results showed that the HRAP System had a good performance in nutrient removal, especially in NH+4-N removal. Total removal efficiencies of COD, TN, NH+4-N and TP were 80, 51.8, 90.2 and 52.1%, respectively. About 61.6% of NH+4-N in the 1st-stage HRAP and 70.9% in the 2nd-stage HRAP were transformed into NO−3-N and NO2−-N through nitrification, and the nitrogen losses via ammonia volatilization was only 2.7% (for 1st-stage HRAP) and 8.8% (for 2nd-stage HRAP). The other 35.7% and 20.3% of NH+4-N removal were achieved by algae assimilation respectively. About 98.0% (for 1st-stage HRAP) and 84.8% (for 2nd-stage HRAP) removal of TN were attributed to algae sedimentation, while those through ammonia volatilization were only 2.0% (for 1st-stage HRAP) and 15.4% (for 2nd-stage HRAP), respectively. Therefore, the main mechanisms of NH+4-N removal in HRAP were nitrification and algae assimilation, and TN was mainly removed by algae sedimentation. About 50.7% (for 1st-stage HRAP) and 53.1% (for 2nd-stage HRAP) of phosphorus in the deposit were organic phosphates respectively, only 20.7% and 27.7% were calcium-bound and magnesium-bound phosphates. The removal mechanism of TP in HRAP could be mainly attributed to algae assimilation in forms of organic phosphate, and chemical precipitation in forms of calcium-bound and magnesium-bound.

Anaerobic sequencing batch reactors in pilot-scale for domestic sewage treatment

Desalination ◽  
2007 ◽  
Vol 216 (1-3) ◽  
pp. 174-182 ◽  
Author(s):  
Arnaldo Sarti ◽  
Bruna S. Fernandes ◽  
Marcelo Zaiat ◽  
Eugenio Foresti
Keyword(s):  
Sewage Treatment ◽  
Pilot Scale ◽  
Domestic Sewage ◽  
Batch Reactors ◽  
Sequencing Batch Reactors

Pilot-Scale Experiments in Water Hyacinth Lagoons for Wastewater Treatment

1987 ◽  
Vol 19 (10) ◽  
pp. 129-173 ◽  
Author(s):  
H. Kawai ◽  
M. Y. Uehara ◽  
J. A. Gomes ◽  
M. C. Jahnel ◽  
R. Rossetto ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Water Hyacinth ◽  
Sewage Treatment ◽  
Pilot Scale ◽  
Domestic Sewage ◽  
Direct Application ◽  
Point Of View ◽  
Tertiary Level ◽  
Industrial Level ◽  
Organic Compost

Based on some information collected in foreign bibliography which classifies water hyacinth as one of the possible interesting alternatives for the treatment of some types of domestic sewage, CETESB has since 1980 been developing, in participation with other institutions, a series of pilot-scale experiments in order to evaluate the real applicability of this system of wastewater treatment in Brazil. The conclusions that can be drawn from the experiments that have been carried out up to the present have indicated that the water hyacinth lagoon presents a better performance when it is integrated with other treatment systems, mainly at tertiary level, instead of its direct application to raw sewage treatment. One of the operational problems of this system, which has been observed during the experiments, refers to the intense proliferation of mosquitos, the control levels of which were not satisfactory even with the periodical application of larvicide. The problem of water hyacinth removal and its use as biomass has not been solved at industrial level yet. In pilot-scale experiments carried out by CETESB, the use of water hyacinth as an organic compost has proved to be economically unfeasible, on an industrial scale, considering that there are many other residues which offer better alternatives both from the economical point of view and the available amounts.

Effect of Different Temperature on Sewage Treatment of Constructed Wetlands Pretreatment System

2013 ◽  
Vol 368-370 ◽  
pp. 491-495
Author(s):  
Yong Hong Shui ◽  
Qiao Qiao Li ◽  
Hong Yan Song ◽  
Ai She Shui ◽  
Yuan Hui Li
Keyword(s):  
Water Temperature ◽  
Removal Efficiency ◽  
Constructed Wetlands ◽  
Sewage Treatment ◽  
Great Influence ◽  
Class Ii ◽  
Pilot Scale ◽  
Effect Of Temperature ◽  
Class Iii ◽  
Wetland System

In order to further investigate the effect of temperature on the performance of the pretreatment system of constructed wetlands, two pilot-scale units with dimensions of 2m in length and 1m in width were operated to treat decentralized sewage focusing on the removal efficiency of floated-bed bio-film (FBF) pretreatment system treating influent under different temperature continuously from April 2011 to March 2012 in parallel experiments in Chengdu, Sichuan Province. The results showed that the average removal efficiency of TP, TN, NH3-N and COD were (22.1%, 31.8%, 29.4% and 59.8%), (34.7%, 31.2%, 22.5% and 34.1%) and (53.1%, 56.8%, 53.6% and 41.8%) at different temperature of 10°C, 10°C to 20°C and exceeded 20°C respectively. The effluent concentrations of NH3-N reached Class II demand of GB 18918-2002 in different temperature. TN reached Class I-B demand when the water temperature was above 20°C. TP reached Class II and Class III demand when the water temperature was above 10°C and below 10°C, respectively. The TN, NH3-N and TP removal efficiencies showed to great influence on temperature, however COD on the contrary. Pretreatment system alleviated the hidden clogging troubles of the subsequent potential filter pools in wetland system to the maximum and ensured the continuous high-load treating ability of the wetland system. The pretreatment technology of the floated-bed bio-film system is a small, flexible and economical device which is worthy of promotion.

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