Laboratory Study on the Performance of Domestic Wastewater Biofilters Made of Arundo Donax L.

2013 ◽  
Vol 295-298 ◽  
pp. 1104-1109
Author(s):  
Jun Cui ◽  
Liang Wang
Keyword(s):  
Laboratory Study ◽  
Phosphorus Content ◽  
Domestic Wastewater ◽  
Arundo Donax ◽  
Treatment Efficiency ◽  
Nitrogen And Phosphorus ◽  
Domestic Wastewater Treatment ◽  
Relationship Of ◽  
The Relationship ◽  
Arundo Donax L

Filter systems have the ability to remove pollutants from wastewater. However, to increase the treatment efficiency, the filter made of plants has been recommended which has been called the biofilter. The objective of this study was to examine the performance of biofilter made by Arundo donax L. on domestic wastewater treatment. In this paper, a laboratory study using vertical flow constructed wetlands planted with Arundo donax L. and without any other plants were conducted. For the biofilter planted in Arundo donax L., the removal of TN, NH4+-N and TP 89%, 93% and 98% respectively. In particular, we also got the nitrogen and phosphorus content of different parts of Arundo donax L. which was divided into root, stem and leaves. For the total nitrogen content in the plant, there is a quantitive relationship of stem<root<leaves. For the total phosphorus content, the relationship is root<stem<leaves quantitatively. Whilst, compared with the total removal of nitrogen and phosphorus, the removal via plant absorption accounts for 22% and 29% separately. The results of this research suggest that Arundo donax L. with large leaves could be used as a main plant in the domestic wastewater biofilter.

scholarly journals Performance and Energy Consumption Evaluation of Rotating Biological Contactor for Domestic Wastewater Treatment

2021 ◽  
Vol 6 (1) ◽  
pp. 101-112
Author(s):  
Sharjeel Waqas ◽  
Muhammad Roil Bilad ◽  
Zakaria B Man
Keyword(s):  
Wastewater Treatment ◽  
Nitrogen Removal ◽  
Operating Cost ◽  
Domestic Wastewater ◽  
Nitrifying Bacteria ◽  
Organic Loading Rate ◽  
Treatment Efficiency ◽  
Domestic Wastewater Treatment ◽  
Rotating Biological Contactors ◽  
Biological Performance

Biological processes are extensively used for wastewater treatment because of low organic footprint, economically feasible, and high treatment efficiency. Rotating biological contactors (RBC), an attached growth biological process offers advantage of low operating cost, simple configuration and structure, reduced bionomical footprint and thus has been extensively employed for organics and nitrogen removal. In this study, RBC was used for the treatment of synthetic domestic wastewater operating at high hydraulic and organic loading rate to demonstrate the biological performance. The results showed that the RBC achieved a treatment efficiency for COD, ammonium, TN and turbidity of 70.2%, 95.2%, 70%, and 78.9 %, respectively. The efficient nitrogen removal and increased nitrate concentration signify the presence of nitrifying bacteria which actively degrade the nitrogen compounds through the nitrification process. Thus, this system is a sound alternative for both domestic and industrial wastewater treatment for decentralized applications.

Seeking a way to promote the use of constructed wetlands for domestic wastewater treatment in developing countries

2011 ◽  
Vol 63 (4) ◽  
pp. 654-659 ◽  
Author(s):  
F. Zurita ◽  
M. A. Belmont ◽  
J. De Anda ◽  
J. R. White
Keyword(s):  
Developing Countries ◽  
Wastewater Treatment ◽  
Constructed Wetlands ◽  
Subsurface Flow ◽  
Domestic Wastewater ◽  
Treatment Efficiency ◽  
Zantedeschia Aethiopica ◽  
Domestic Wastewater Treatment ◽  
Anthurium Andreanum ◽  
Strelitzia Reginae

The aim of this study was to evaluate the domestic wastewater treatment efficiency as well as the survivability of commercially valuable ornamental plants in subsurface flow wetlands (SSFW) for domestic wastewater (DWW) treatment in laboratory and pilot wetland studies. The laboratory scale study included five different species (Zantedeschia aethiopica, Strelitzia reginae, Anthurium andreanum, Canna hybrids and Hemmerocallis dumortieri) that were evaluated in horizontal flow subsurface treatment cells. All the plants survived during the 6-month experimental period demonstrating high wetland nutrient treatment efficiency. In order to validate and expand these preliminary results, a pilot-scale wetland study was carried out in SSFWs under two different flow regimes (horizontal and vertical flow). Four ornamental species were tested during a 1-year period: Zantedeschia aethiopica, Strelitzia reginae, Anthurium andreanum and Agapanthus africanus. The removal efficiencies were significantly higher in the vertical subsurface-flow constructed wetlands (VFCW) for all pollutants, except for nitrate (NO3-N), total nitrogen (TN) and total suspended solids (TSS). These results show that it is feasible to use select non-wetland plants with high market value in SSFWs without reducing the efficiency of the wastewater treatment system, although future work should continue in order to apply this technology in a large scale. The added value of floriculture in treatment wetlands can help to promote the use of constructed wetlands (CW) for domestic wastewater treatment in developing countries where economical resources are scarce and water pollution with DWW is common.

Rural domestic wastewater treatment in Norway and Poland: experiences, cooperation and concepts on the improvement of constructed wetland technology

2011 ◽  
Vol 63 (4) ◽  
pp. 776-781 ◽  
Author(s):  
A. M. Paruch ◽  
T. Mæhlum ◽  
H. Obarska-Pempkowiak ◽  
M. Gajewska ◽  
E. Wojciechowska ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Constructed Wetland ◽  
Rural Areas ◽  
High Performance ◽  
Domestic Wastewater ◽  
Additional Treatment ◽  
Innovative Technology ◽  
Biogenic Elements ◽  
Treatment Efficiency ◽  
Domestic Wastewater Treatment

This article describes Norwegian and Polish experiences concerning domestic wastewater treatment obtained during nearly 20 years of operation for constructed wetland (CW) systems in rural areas and scattered settlements. The Norwegian CW systems revealed a high performance with respect to the removal of organic matter, biogenic elements and faecal indicator bacteria. The performance of the Polish CW systems was unstable, and varied between unsatisfied and satisfied treatment efficiency provided by horizontal and vertical flow CWs, respectively. Therefore, three different concepts related to the improvement of CW technology have been developed and implemented in Poland. These concepts combined some innovative solutions originally designed in Norway (e.g. an additional treatment step in biofilters) with Polish inspiration for new CWs treating rural domestic wastewater. The implementation of full-scale systems will be evaluated with regard to treatment efficiency and innovative technology; based on this, a further selection of the most favourable CW for rural areas and scattered settlements will be performed.

Utilization of a hybrid sequencing batch reactor (HSBR) as a decentralized system of domestic wastewater treatment

2008 ◽  
Vol 57 (12) ◽  
pp. 1951-1956 ◽  
Author(s):  
R. H. R. da Costa ◽  
V. S. Souto ◽  
A. T. S. Prelhaz ◽  
L. G. L. Neto ◽  
D. B. Wolff
Keyword(s):  
Removal Efficiency ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Domestic Wastewater ◽  
Ammonium Concentration ◽  
Cylindrical Shape ◽  
Nitrogen And Phosphorus ◽  
Decentralized System ◽  
Treated Effluent ◽  
Domestic Wastewater Treatment

This paper presents the experiments carried out in a hybrid sequencing batch reactor (HSBR), used for biological treatment of sewage. The HSBR was built in a cylindrical shape and made of stainless steel, with a volume of 1.42 m3. Besides the biomass in suspension, the reactor also carried fixed biomass (hybrid process), adhered in the support material. This consisted of a nylon net disposed in a grille for biofilm biomass adhesion. The reactor worked fully automated in operational cycles of maximum 8 hours each, presenting the following phases: filling, anoxic, aerobic, settle and draw of treated effluent, with 3 fillings per cycle. Increasing organic loads (0.14 to 0.51 kg TCOD/m3 day) and ammonium loads (0.002 to 0.006 kg NH4-N/m3·day) were tested. We monitored the reactor's performance by measuring the liquid phase (COD, pH, temperature, DO, nitrogen and phosphorus) during the cycles and by measuring the sludge through respirometric tests. The results obtained demonstrated TCOD removal efficiency between 73 and 96%, and ammonium removal efficiency between 50 and 99%. At the end of the cycles, the effluent presented ammonium concentration &lt;20 mg/L, meeting the Brazilian environmental legislation standards (CONAMA 357/2005) regarding discharges into the water bodies. Respirometric tests showed biomass dependency on FCOD concentrations. Results have demonstrated the potential of this type of reactor for decentralized treatment of domestic wastewater.

Pre-Treatment of Municipal MBR Applications in Germany- Current Status and Treatment Efficiency

2006 ◽  
Vol 1 (3) ◽  
Author(s):  
F.B. Frechen ◽  
W. Schier ◽  
M. Wett
Keyword(s):  
Wastewater Treatment ◽  
Mechanical Treatment ◽  
Domestic Wastewater ◽  
Current Status ◽  
Gap Size ◽  
Treatment Efficiency ◽  
Domestic Wastewater Treatment ◽  
Operation Period ◽  
Treatment Stage ◽  
Pre Treatment

Since mid 1999 MBR technology is introduced into domestic wastewater treatment in Germany. First wwtps went in operation performing a conventional mechanical treatment (covering screens, grit chambers and grease traps) without any advanced mechanical pre-treatment stage. After a short operation period module-clogging and hence module sludging was observed. Thus, mechanical pre-treatment was upgraded introducing sieves, first of all to reduce hairs and fibrous substances. But today knowledge is relatively poor concerning effectiveness and treatment efficiency of the whole bunch of aggregates that had been brought to market and vary e.g. in gap size and gap geometry. This paper gives the basics of sieving, the current status of mechanical pre-treatment on German municipal MBR plants and exemplifies an investigation to determine treatment efficiency of two different sieve aggregates.

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