scholarly journals Biomass Production and Removal of Nitrogen and Phosphorus from Processed Municipal Wastewater by Salix schwerinii: A Field Trial

Water ◽  
2021 ◽  
Vol 13 (16) ◽  
pp. 2298
Author(s):  
Muhammad Mohsin ◽  
Erik Kaipiainen ◽  
Mir Md Abdus Salam ◽  
Nikolai Evstishenkov ◽  
Nicole Nawrot ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Biomass Production ◽  
Field Trial ◽  
Municipal Wastewater ◽  
Treatment Plant ◽  
Climatic Conditions ◽  
Control Treatment ◽  
Nitrogen And Phosphorus ◽  
Short Rotation ◽  
Nutrients Uptake

In many Baltic regions, short-rotation willow (Salix spp.) is used as a vegetation filter for wastewater treatment and recycling of valuable nutrients to upsurge bioeconomy development. In this context, a four-year field trial (2016–2019) was carried out near a wastewater treatment plant in eastern Finland (Outokumpu) to investigate the effect of the processed wastewater (WW) on biomass production as well as the nutrients uptake capability (mainly N and P) by a willow variety (Salix schwerinii). Results indicated that WW irrigation expressively increased the willow diameter growth and biomass yield around 256% and 6510%, respectively, compared to the control treatment site (without WW). The willow was also able to accumulate approximately 41–60% of the N and 32–50% of the P in two years (2018–2019). Overall, willow showed a total 20% mortality rate under WW irrigation throughout the growing periods (2017–2019) as compared to control (39%). The results demonstrate that willow has the potential to control eutrophication (reducing nutrients load) from the wastewater with the best survival rate and can provide high biomass production for bioenergy generations in cold climatic conditions.

Application of reversed A2/O process on removing nitrogen and phosphorus from municipal wastewater in China

2011 ◽  
Vol 63 (10) ◽  
pp. 2138-2142 ◽  
Author(s):  
X. S. Kang ◽  
C. Q. Liu ◽  
B. Zhang ◽  
X. J. Bi ◽  
F. Zhang ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Phosphorus Removal ◽  
Municipal Wastewater ◽  
Treatment Plant ◽  
Practical Application ◽  
Nitrogen And Phosphorus ◽  
Nitrogen And Phosphorus Removal ◽  
New Process ◽  
Technical Features

The application of reversed A2/O process in practice in China is mainly discussed in this paper. As a new process on nitrogen and phosphorus removal, principle and technical features of reversed A2/O process are also summarized. The application in rebuilt wastewater treatment plant shows that reversed A2/O process not only has merits on high nitrogen and phosphorus removal efficiency, but also has merits on energy saving. The application in newly-build wastewater treatment plant shows that infrastructure and equipment investment of reversed A2/O process economized 15% and 10% respectively, compared to conventional A2/O process. The practical application shows that reversed A2/O process is a new nitrogen and phosphorus removal process, which is suitable for China's national conditions.

scholarly journals Activated Sludge Microbial Community and Treatment Performance of Wastewater Treatment Plants in Industrial and Municipal Zones

2020 ◽  
Vol 17 (2) ◽  
pp. 436 ◽  
Author(s):  
Yongkui Yang ◽  
Longfei Wang ◽  
Feng Xiang ◽  
Lin Zhao ◽  
Zhi Qiao
Keyword(s):  
Wastewater Treatment ◽  
Microbial Community ◽  
Activated Sludge ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Wastewater Sludge ◽  
Community Diversity ◽  
Nitrogen And Phosphorus ◽  
Metabolic Functions

Controlling wastewater pollution from centralized industrial zones is important for reducing overall water pollution. Microbial community structure and diversity can adversely affect wastewater treatment plant (WWTP) performance and stability. Therefore, we studied microbial structure, diversity, and metabolic functions in WWTPs that treat industrial or municipal wastewater. Sludge microbial community diversity and richness were the lowest for the industrial WWTPs, indicating that industrial influents inhibited bacterial growth. The sludge of industrial WWTP had low Nitrospira populations, indicating that influent composition affected nitrification and denitrification. The sludge of industrial WWTPs had high metabolic functions associated with xenobiotic and amino acid metabolism. Furthermore, bacterial richness was positively correlated with conventional pollutants (e.g., carbon, nitrogen, and phosphorus), but negatively correlated with total dissolved solids. This study was expected to provide a more comprehensive understanding of activated sludge microbial communities in full-scale industrial and municipal WWTPs.

Upgrading of a Combined Industrial and Municipal Wastewater Treatment Plant – The Fredericia Plant, Denmark

1990 ◽  
Vol 22 (7-8) ◽  
pp. 225-232
Author(s):  
G. Petersen
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Municipal Wastewater ◽  
Treatment Plant ◽  
Treatment Strategies ◽  
Pilot Scale ◽  
Municipal Wastewater Treatment ◽  
Nitrogen And Phosphorus ◽  
Effluent Quality ◽  
Biological Nitrogen

The upgrading of an existing mechanical wastewater treatment plant to meet the new standards for effluent quality in the Municipality of Fredericia, Denmark, are presented. The Municipality has a lot of very big organic and inorganic industries, which leaves several different possibilities for treatment strategies. In 1987 pilot-scale tests were carried out to study the effects of various combinations of wastewater types on the treatment efficiency, and the tests resulted in two main solutions for the wastewater treatment system. The pilot-scale tests were run in a two - stage biology plant. The first stage was either a BIOSORPTION unit or a PRE-DENITRIFICATION unit. The second stage was a biological nitrogen and phosphorus removal unit (a BIO-DENIPHO unit).

scholarly journals Municipal Wastewater: A Sustainable Source for the Green Microalgae Chlorella vulgaris Biomass Production

2021 ◽  
Vol 11 (5) ◽  
pp. 2207
Author(s):  
Diana Pacheco ◽  
A. Cristina S. Rocha ◽  
Analie Garcia ◽  
Ana Bóia ◽  
Leonel Pereira ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Biomass Production ◽  
Chlorella Vulgaris ◽  
Municipal Wastewater ◽  
Treatment Plant ◽  
Basal Medium ◽  
Chlorophyll Synthesis ◽  
Secondary Effluent ◽  
Municipal Wastewater Treatment ◽  
Run Off

The need to reduce the costs associated with microalgae cultivation encouraged scientific research into coupling this process with wastewater treatment. Thus, the aim of this work was to assess the growth of Chlorella vulgaris (Chlorophyta) in different effluents from a municipal wastewater treatment plant (WWTP), namely secondary effluent (SE) and sludge run-off (SR). Assays were performed, under the same conditions, in triplicate with 4 dilution ratios of the wastewaters (25%, 50%, 75% and 100%) with the standard culture medium bold basal medium double nitrated (BBM2N) as a control. The capability of C. vulgaris for biomass production, chlorophyll synthesis and nutrients removal in the SE and SR was evaluated. The 25% SE and 25% SR showed increased specific growth rates (0.47 and 0.55 day−1, respectively) and higher biomass yields (8.64 × 107 and 1.95 × 107 cells/mL, respectively). Regarding the chlorophyll content, the 100% SR promoted the highest concentration of this pigment (2378 µg/L). This green microalga was also able to remove 94.8% of total phosphorus of SE, while in 50% SR, 31.2% was removed. Removal of 73.9% and 65.9% of total nitrogen in 50% and 100% SR, respectively, was also observed. C. vulgaris growth can, therefore, be maximized with the addition of municipal effluents, to optimize biomass production, while cleansing the effluents.

Nitrogen and phosphorus removal using fluidized-carriers in a full-scale A2O biofilm system

2020 ◽  
Author(s):  
Keke Xiao
Keyword(s):  
Wastewater Treatment ◽  
Phosphorus Removal ◽  
Municipal Wastewater ◽  
Treatment Plant ◽  
Full Scale ◽  
Anammox Bacteria ◽  
Municipal Wastewater Treatment ◽  
Nitrogen And Phosphorus ◽  
Class Level ◽  
Microbial Analysis

<p>A full-scale biofilm system using fluidized-carriers integrated with anaerobic-anoxic–aerobic process (treatment capacity of 3.75 × 10<sup>5</sup> m<sup>3</sup> d<sup>−1</sup>) was used for municipal wastewater treatment. The results indicated relatively higher removal efficiencies of 86% total nitrogen (TN), 97% ammonium (NH<sub>4</sub>-N) and 97% total phosphorus (TP) were achieved, with 0.32 mg L<sup>−1</sup> TP, 0.81 mg L<sup>−1</sup> NH<sub>4</sub>-N and 8.07 mg L<sup>−1</sup> TN in the effluent, which meet the Class A of Discharge standard of pollutants for municipal wastewater treatment plant (GB18918-2002) of China. The results of microbial analysis indicated that the dominant microorganisms in the suspended sludge were Proteobacteria and Bacteroidetes at phylum level and β-Proteobacter at class level. The dominant microorganism in the biofilm was Proteobacteria at phylum level, with γ-Proteobacter (17.5%), β-Proteobacter (14%) and δ-Proteobacter (13.08%) distributed at class levels. The presence of Proteobacteria and Bacteroidetes in this system may be related with the phosphorus removal. A reddish color biofilm was formed on the surface of fluidized-carriers in the anaerobic tank and showed specific anammox ability, this may be related with the dominance of 0.0278% Planctomycetaceae at family level and 0.0278% Planctomycetales at order level. Besides the denitrification effects, the possible anammox bacteria present in the anaerobic tank might have also contributed to high nitrogen removal efficiency.</p>

scholarly journals Willow coppice plantations as wastewater treatment systems

2019 ◽  
pp. 233-238
Author(s):  
Stig Larsson
Keyword(s):  
Wastewater Treatment ◽  
Municipal Wastewater ◽  
Climatic Conditions ◽  
European Countries ◽  
Negative Consequences ◽  
Research Project ◽  
Climatic Regions ◽  
Positive Effects ◽  
Short Rotation ◽  
Wastewater Treatment Systems

Short rotation willow coppice (Salix) can be used as vegetation filter to treat industrialand municipal wastewater. In May 1998 a EU-FAIR project, "Biomass short rotationwillow coppice fertilized with nutrient from municipal wastewater (BWCW)" wasstarted to investigate the consequences to establish willow plantations to treatwastewater in some European countries with varying climatic conditions. The aims ofthis research project were to evaluate the positive effects of irrigation of willow-toenergy plantations with wastewater, but also to find the negative consequences and todevelop strategies to deal with them. The project comprises comparable pilot plantationslocated in four different climatic regions in the four European countries: France, Greece,Unite Kingdom and Sweden. In this paper the experiences from this EU research projectBWCW, which will be finished off in 2002, are briefly described.

Status of construction and operation of large wastewater treatment plants in South Korea

1996 ◽  
Vol 33 (12) ◽  
pp. 11-18 ◽  
Author(s):  
I.S. Kim ◽  
J.Y. Ryu ◽  
J.J. Lee
Keyword(s):  
Wastewater Treatment ◽  
South Korea ◽  
Municipal Wastewater ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Municipal Sewage ◽  
Nutrient Concentrations ◽  
Nitrogen And Phosphorus ◽  
Activated Sludge Processes

The history of wastewater treatment in Korea began in 1976 with construction of Chongke sewage treatment plant in the city of Seoul. At present, there are 48 large municipal sewage treatment plants for 42 cities with a total treatment capacity of 7,841,000 m3/d. This indicates that the population receiving sewage treatment is 42% of the total national population. The government is planning to extend the population receiving wastewater treatment to 73% by the year 1997. It turned out that activated sludge processes are the most popular type (39 out of 48 plants) for the treatment of municipal wastewater. The present lawful effluent criteria for BOD, COD, and SS from large municipal wastewater treatment plant are changing from 30 mg/l, 50 mg/l, and 70 mg/l, to 20 mg/l, 40 mg/l, and 20 mg/l, respectively, by the year 1996. Regulation of the total concentrations of nitrogen and phosphorus are also added as 60 mg/l and 8 mg/l, respectively. The enactment to control the nutrient concentrations in the lake and pond is inevitable for the protection of drinking water in South Korea.

Implications of nutrient removal and biomass production by native and augmented algal populations at a municipal wastewater treatment plant

2014 ◽  
Vol 70 (7) ◽  
pp. 1152-1160
Author(s):  
Ivy L. C. Drexler ◽  
Sascha Bekaan ◽  
Yasmin Eskandari ◽  
Daniel H. Yeh
Keyword(s):  
Wastewater Treatment ◽  
Biomass Production ◽  
Nutrient Removal ◽  
Wastewater Treatment Plant ◽  
Native Species ◽  
Municipal Wastewater ◽  
Algal Species ◽  
Treatment Plant ◽  
Phosphorus Adsorption ◽  
Bod Removal

Algal monocultures (Chlorella sorokiniana and Botryococcus braunii) and algal communities native to clarifiers of a wastewater treatment plant were batch cultivated in (1) clarified effluent following a biochemical oxygen demand (BOD) removal reactor post-BOD removal clarified effluent (PBCE), (2) clarified effluent following a nitrification reactor post-nitrification clarified effluent (PNCE), and (3) a reference media (RM). After 12 days, all algal species achieved nitrogen removal between 68 and 82% in PBCE and 37 and 99% in PNCE, and phosphorus removal between 91 and 100% in PBCE and 60 and 100% in PNCE. The pH of the wastewater samples increased above 9.8 after cultivation of each species, which likely aided ammonia volatilization and phosphorus adsorption. Both monocultures grew readily with wastewater as a feedstock, but B. braunii experienced significant crowding from endemic fauna. In most cases, native algal species' nutrient removal efficiency was competitive with augmented algal monocultures, and in some cases achieved a higher biomass yield, demonstrating the potential to utilize native species for nutrient polishing and algal biomass production.

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