Potential of duckweed in the conversion of wastewater nutrients to valuable biomass: A pilot-scale comparison with water hyacinth

2014 ◽  
Vol 163 ◽  
pp. 82-91 ◽  
Author(s):  
Yonggui Zhao ◽  
Yang Fang ◽  
Yanling Jin ◽  
Jun Huang ◽  
Shu Bao ◽  
...  
Keyword(s):  
Water Hyacinth ◽  
Pilot Scale

Pig Wastewater Treatment in Water Hyacinth Ponds

1992 ◽  
Vol 26 (9-11) ◽  
pp. 2381-2384 ◽  
Author(s):  
C. Polprasert ◽  
S. Kessomboon ◽  
W. Kanjanaprapin
Keyword(s):  
Wastewater Treatment ◽  
Water Hyacinth ◽  
Loading Rate ◽  
Pilot Scale ◽  
Operating Conditions ◽  
Cod Removal ◽  
Organic Loading Rate ◽  
Small Scale ◽  
N Removal ◽  
In Series

Small-scale and pilot-scale experiments were conducted on pig wastewater treatment in water hyacinth (Eichhornia crassipesl ponds. The main objectives were to evaluate the treatment performance of the water hyacinth ponds and to determine suitable operating conditions. From the experimental results obtained, the optimum organic loading rate was found to be 200 kg COD/(ha.d), while the hydraulic retention times were proposed to be 10-20 days. The % COD removal in the small-scale water hyacinth ponds were 74-93, while for the pilot-scale ponds the % COD removal were 52-72 because of fluctuations in the influent wastewater characteristics and occasional insect attacks on the water hyacinth leaves and stems. Similar results were obtained for N removal. Although the water hyacinth ponds were found to be feasible for pig wastewater treatment, at least one polishing pond in series should be provided to polish the water hyacinth pond effluents before discharging into the environment.

Control and separation of algae particles from WSP effluent by using floating aquatic plant root mats

2001 ◽  
Vol 43 (11) ◽  
pp. 315-322 ◽  
Author(s):  
Y. Kim ◽  
W.-J. Kim ◽  
P.-G. Chung ◽  
W. O. Pipes
Keyword(s):  
Water Hyacinth ◽  
Aquatic Plant ◽  
Plant Root ◽  
Pilot Scale ◽  
Waste Stabilization Ponds ◽  
Attachment Sites ◽  
Waste Stabilization ◽  
Continuous Reproduction ◽  
Adsorption Phenomena ◽  
Integrated Processes

In this paper, the potential uses of water hyacinth and its root mats for separating algae particles in the effluent from waste stabilization ponds (WSPs) were discussed. Pilot-scale integrated processes consisting of WSPs and multiple WHPs (water hyacinth ponds) were operated in order to extract effects of the root mats on the reduction of algae concentrations. Root mats in the bottom of WHPs separated significant amount of the algae cells through attachment as the effluent from WSPs passed through them. Attachment of the algae particles to the surface of live roots was found to be similar to adsorption phenomena but it lasted even at saturation, probably due to the continuous reproduction of active attachment sites by detachment and growth of the roots. Additionally, this paper discusses attachment mechanisms and other issues concerning design and polishing of the WSPs effluent by WHPs.

Pilot-scale water hyacinth bed for dewatering of sewage sludge

2020 ◽  
Vol 194 ◽  
pp. 450-458
Author(s):  
A.S. El-Gendy ◽  
A.G. Ahmed
Keyword(s):  
Sewage Sludge ◽  
Water Hyacinth ◽  
Pilot Scale

Composting of Water Hyacinth using a Pilot Scale Rotary Drum Composter

2012 ◽  
Vol 17 (2) ◽  
pp. 69-75 ◽  
Author(s):  
Waikhom Roshan Singh ◽  
Ayan Das ◽  
Ajay Kalamdhad
Keyword(s):  
Water Hyacinth ◽  
Pilot Scale ◽  
Rotary Drum ◽  
Rotary Drum Composter

Tertiary treatment of piggery wastes in water hyacinth ponds

2000 ◽  
Vol 42 (10-11) ◽  
pp. 211-214 ◽  
Author(s):  
R. H. Costa ◽  
A. S. Bavaresco ◽  
W. Medri ◽  
L. S. Philippi
Keyword(s):  
Water Hyacinth ◽  
Hydraulic Retention Time ◽  
Pilot Scale ◽  
Tertiary Treatment ◽  
Continuous State ◽  
And Performance ◽  
Two Stages ◽  
Animal Diet ◽  
Water Hyacinths ◽  
Local Parameters

This work was developed in two stages: initially in water hyacinth ponds under batch conditions (pilot-scale) and later in full-scale ponds under a continuous state, so as to determine local parameters for the operation of this kind of pond for piggery wastes treatment. Seasonal variations are important features influencing plant productivity and performance. The water hyacinth ponds were able to remove around 50% of the applied organic loads (COD, BOD, TN, TP), even in case of elevated values (110 kg/ha/day) applied for total nitrogen surface loads. An hydraulic retention time of 20 days was shown to be ideal for the treatment. The utilization of water hyacinths as a complement for the animal diet closes the productive cycle in a sustainable way. The results have demonstrated the feasibility of the proposed treatment system.

Vermicomposting of sewage sludge: a new technology for Mexico

2002 ◽  
Vol 46 (10) ◽  
pp. 153-158 ◽  
Author(s):  
L. Cardosa Vigueros ◽  
E. Ramírez Camperos
Keyword(s):  
Sewage Sludge ◽  
Water Hyacinth ◽  
New Technology ◽  
Pilot Scale ◽  
Exchange Capacity ◽  
Fecal Coliforms ◽  
High Concentration ◽  
Cocoon Production ◽  
Cationic Exchange ◽  
Restricted Use

In Mexico 31% of the treatment plants have a flow less than 60 l/s. This study offers a simple and economical alternative through vermicomposting to resolve the management of sewage sludge and water hyacinth for these small treatment plants. This study was developed with laboratory and pilot scale systems. In the laboratory Eisenia foetida survival was quantified. They were fed three doses of sludge and water hyacinth and different percentages of humidity were applied. The production of worm cocoons was quantified as biomass production and the reduction in the TV/STS ratio as an indicator of stability. To install the pilot system the mixture with the highest cocoon production was chosen. In the pilot test the effect of the worm population density on the waste degradation was observed, the experiment was divided into five modules, four with densities from 2.5 to 15 kg/m2 and one module without worms that served as a blank test. Results: the best mixture was 70% sewage sludge and 30% water hyacinth, with 80% humidity and an average production of 298 cocoons/kg of vermicompost. There were no significant differences in the TVS/TS reduction between the different modules with worms, but in the blank test module there was no reduction. The Type A vermicompost obtained, with non-restricted use, 900 fecal coliforms NMP/g, 0.0 helminth ova/g, highly organic (60% M.O.), high concentration of total nitrogen (2.5%), phosphorus (0.96%) and cationic exchange capacity (60.2 meq/100 g), which indicates that soil fertility would increase if used in agriculture.

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.

Optimization of the treatment of piggery wastes in water hyacinth ponds

2003 ◽  
Vol 48 (2) ◽  
pp. 283-289 ◽  
Author(s):  
R.H.R. Costa ◽  
C.T. Zanotelli ◽  
D.M. Hoffmann ◽  
P. Belli Filho ◽  
C.C. Perdomo ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Water Hyacinth ◽  
Waste Treatment ◽  
Plant Density ◽  
Pilot Scale ◽  
Optimal Harvesting ◽  
Experimental Systems ◽  
Total Nitrogen Removal ◽  
The Mathematical Model ◽  
Better Than

This work investigates the optimal management of water hyacinth ponds for the improvement of piggery waste treatment. The optimal harvesting strategy for the water hyacinth was studied using a single mathematical model. The water hyacinth optimal harvesting problem was formulated as an optimal control problem that was solved by application of Pontryagin's Maximum Principle. The optimization of the water hyacinth control in the pond indicates that the plant density should be reduced whenever it reaches half of the maximum capacity for growth. Two experimental systems were used to validate the mathematical model, one in real scale and the other in pilot scale. The results demonstrated the feasibility of the proposed harvesting strategy. For example, a comparison of the total nitrogen removal in the different pilot ponds confirmed the modeling results, in that the performance of the pond maintained with 50% water hyacinth cover was better than the others.

scholarly journals Controlling water hyacinth infestation in Lake Tana using Fungal pathogen from Laboratory level upto pilot scale

2020 ◽  
Author(s):  
Adugnaw Admas ◽  
Samuel Sahile ◽  
Aklilu Agidie ◽  
Hailu Menale ◽  
Tadelo Gedefaw ◽  
...  
Keyword(s):  
Disease Severity ◽  
Water Hyacinth ◽  
Infected Plant ◽  
Pilot Scale ◽  
Scientific Data ◽  
Lake Tana ◽  
Green House ◽  
Moderate Disease ◽  
Disease Severity Scale ◽  
Infected Plant Material

ABSTRACTWater hyacinth (Eichhornia crassipes) is one of the most dangerous aquatic weeds for Lake Tana and other water body in Ethiopia. To reduce its invasion biological, chemical and physical control methods can be used. Use of natural biological enemies of the weed to discourage its propagation is one of the best recommended options by scientfic society. Among them, there are more fungi naturally a pathogen for water hyacinth and other plants. To use those patogenes to manage water hyacinth infestation in Lake Tana infected plant material by fungi were collected from three weredas (Amba Gyorgese, Dabat and Debarke) around Gondar at 20 Peasant associations (PAs) since Novmber 2015. The collection was done from infected Faba bean leaves and roots. All isolated fungus was attempted to infect the collected healthy water hyacinth in laboratory and green house. Among isolated fungus species Rhizoctonia solani, Aspergillus flatus, Tricothcium roseum, Fusarium spp and Aspergillus niger fungi show high moderate disease severity on the healthy water hyacinth at temporarey green house and laboratory. Disease severity scale was recorded using modified NAHEMA et al. (200). By following those experiments to show its efficiency, the effective pathogens on laboratory and green house were released to 16 m2 open ponds since September 2016, in University of Gondar. In this study, we have recorded scientific data that shows the fungi were high potencial to attack healthy water hyacinth at above 26 oc and at less than 25 % humidity. From this research also we have observed the most infected water hyacinth by fungi have not produced flower and it can not re generate by seed in the next propagation sesaon.Finally, before directly release the fungi on Lake Tana its impacts were studied in the Goregora, at Kuame Michel kebela for a year in open ponds and in controlled wet land areas that not linked to the Lake by taking some common aquatic plants and fish from the Lake. Fortunatelly, those fungi have not impact on aquatic plant like Echinochloa and Cyperus papyrus grass, water quality and fish.

scholarly journals Removal of organic matter and nutrients from slaughterhouse wastewater by using Eichhornia crassipes and evaluation of the generated biomass composting

2009 ◽  
Vol 29 (3) ◽  
pp. 466-473 ◽  
Author(s):  
Juliana B. R. Mees ◽  
Simone D. Gomes ◽  
Márcio A. Vilas Boas ◽  
Ajadir Fazolo ◽  
Sílvio C. Sampaio
Keyword(s):  
Organic Matter ◽  
Water Hyacinth ◽  
Eichhornia Crassipes ◽  
Production Management ◽  
Plant Density ◽  
Aquatic Macrophyte ◽  
C:N Ratio ◽  
Pilot Scale ◽  
Ammonia Nitrogen ◽  
Treatment System

The objective of this research was to evaluate the performance of the aquatic macrophyte Eichhornia crassipes applied in situ in a slaughter house treatment system, located in the west of the Paraná state, Brazil, regarding the nutrients removal and organic matter. Moreover, it aimed to obtain data from the production, management and composting practices of the biomass generated in the system. During 11 months of macrophytes development, physic and chemical parameters were monitored and plant density was controlled by periodical removal of excess biomass, which was weekly monitored and it is expressed in kg of aquatic plant per m² covered area. The degradation of the macrophytes removed from the treatment system was evaluated at the pilot scale in eight composting piles of 0.60 m³ that underwent four different treatments and two repetitions: T1 - water hyacinth (Eichhornia crassipes); T2 - water hyacinth and swine excrement (7:1), T3 - water hyacinth, swine excrement and earth (7:1:0,67), and T4 - water hyacinth, swine excrement and cellulosic gut (7:1:0,67), for a period of 90 days. The results indicated maximum removal efficiencies of 77.2% for COD; 77.8% for BOD, 87.9% for total nitrogen, 47.5% for ammonia nitrogen and 38.9% for total phosphorus for a five-day retention time. For biomass stabilization by composting, considering the C:N ratio as an indicator of compost maturity, it was observed that treatment T4 resulted in the shortest stabilization period (60 days). No difference was verified in the biostabilization rates at 5% level by the F test.

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