Reduction in toxicity of organic priority pollutants by pilot-scale conventional wastewater treatment process

1984 ◽  
Vol 13 (2) ◽  
pp. 191-196 ◽  
Author(s):  
William B. Horning ◽  
Ernest L. Robinson ◽  
Albert C. Petrasek
Keyword(s):  
Wastewater Treatment ◽  
Treatment Process ◽  
Pilot Scale ◽  
Priority Pollutants ◽  
Wastewater Treatment Process ◽  
Conventional Wastewater Treatment

Characterization of membrane foulants in a pilot-scale tunnel construction wastewater treatment process

2014 ◽  
Vol 171 ◽  
pp. 384-388 ◽  
Author(s):  
Jae-Hyun Lee ◽  
Jong-Oh Kim ◽  
Se-Uk Jeong ◽  
Hyun Uk Cho ◽  
Kyung Hwa Cho ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Treatment Process ◽  
Pilot Scale ◽  
Tunnel Construction ◽  
Wastewater Treatment Process

A strategy in wastewater treatment process for significant reduction of excess sludge production

2002 ◽  
Vol 45 (12) ◽  
pp. 127-134 ◽  
Author(s):  
N. Shiota ◽  
A. Akashi ◽  
S. Hasegawa
Keyword(s):  
Wastewater Treatment ◽  
Treatment Process ◽  
Pilot Scale ◽  
Aeration Tank ◽  
Excess Sludge ◽  
Wastewater Treatment Process ◽  
Conventional Activated Sludge ◽  
New Process ◽  
Treatment Step ◽  
Sludge Production

A novel wastewater treatment process (S-TE PROCESS®) with significantly reduced production of excess sludge has been developed. The process consists of two different stages, one for a biological wastewater treatment and the other for a thermophilic aerobic digestion of the resulting sludge. A portion of return sludge from the wastewater treatment step is injected into a thermophilic aerobic sludge digester (TASD), in which the injected sludge is solubilized by the action of thermophilic aerobic bacteria. The solubilized sludge is returned to the aeration tank in the wastewater treatment step for its further degradation. Pilot-scale facilities of the S-TE process and the conventional activated sludge process as a control, both treating the same industrial wastewater, were comparatively operated for totally 270 days. As a result, 93% reduction in overall excess sludge production was achieved in the S-TE operation. The SS solubilization rate in TASD was stable at around 30%. Only a slight increase in the effluent SS and TOC concentrations was observed compared with those of the control facility. Otherwise the removal efficiency of TOC was approximately 95% for both plants. A full-scale plant treating domestic sewage was operated for three years, showing 75% reduction of overall excess sludge production. It was concluded that the new process was feasible.

A study on the effects of ozone dosage on dissolved-ozone flotation (DOF) process performance

2015 ◽  
Vol 71 (9) ◽  
pp. 1423-1428 ◽  
Author(s):  
Xin Jin ◽  
Pengkang Jin ◽  
Xiaochang Wang
Keyword(s):  
Organic Matter ◽  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Treatment Process ◽  
Treatment Plant ◽  
Pilot Scale ◽  
Secondary Effluent ◽  
Process Performance ◽  
Wastewater Treatment Process ◽  
Organic Matter Removal

Dissolved-ozone flotation (DOF) is a tertiary wastewater treatment process, which combines ozonation and flotation. In this paper, a pilot-scale DOF system fed by secondary effluent from a wastewater treatment plant (WWTP) in China was used to study the effect of ozone dosage on the DOF process performance. The results show that an ozone dosage could affect the DOF performance to a large extent in terms of color and organic matter removal as well as disinfection performance. The optimal color and organic matter removal was achieved at an ozone dosage of 0.8 mg/l. For disinfection, significant improvement in performance could be achieved only when the organic matter removal was optimal. The optimal ozone dosage of at least 1.6 mg/l was put forward, in this case, in order to achieve the optimal color, turbidity, organic matter and disinfection performance.

scholarly journals Wastewater Treatment From Pharmaceutical Substances With Filamentous Fungi

2021 ◽  
Author(s):  
◽  
Brigita Daļecka
Keyword(s):  
Wastewater Treatment ◽  
Fluidized Bed ◽  
Filamentous Fungi ◽  
Municipal Wastewater ◽  
Treatment Process ◽  
Pilot Scale ◽  
Municipal Wastewater Treatment ◽  
Wastewater Treatment Process ◽  
Fungal Strains ◽  
Pharmaceutical Substances

The ever-increasing concern about the widespread occurrence of pharmaceutical substances in the aquatic environment has been recognized as an emerging environmental issue, as it can cause undesirable effects on the ecosystem and human health. The current wastewater treatment methods are not designed to treat municipal wastewater from the contamination of various pharmaceutical substances. As a result, pharmaceuticals can enter the environment and pose a threat to life forms. Therefore, it is important to enhance the classical wastewater treatment process in order to meet the challenges by advancing the technologies. Currently, the biological treatment method with filamentous fungi has been considered a promising, cost-effective, and environmentally friendly method for removing pharmaceutical substances from municipal wastewater. Thesis “Wastewater Treatment from Pharmaceutical Substances with Filamentous Fungi” demonstrates the potential application of fungi in removing pharmaceutical substances and their expedience to incorporate into the classical municipal wastewater treatment process. The investigation focused on selecting suitable fungal strains that could adapt without adjusting physico-chemical parameters and compete with the microbial community in the municipal wastewater. Further, the Thesis investigated whether fungal strains could reduce nutrients and pharmaceutical substances in lab-scale and pilot-scale setup and the mechanisms of pharmaceutical substance removal. The research consists of two main stages. In the first stage, the batch-scale experiments were carried out under laboratory conditions, finding out the most suitable fungal strains for the removal of pharmaceutical substances from wastewater. The results demonstrated that fungi compete with each other, since higher removal efficiency was observed if the fungi were grown individually. Batch-scale experiments showed that Trametes versicolor (a laboratory strain) and Aspergillus luchuensis (an environmental isolate from a municipal wastewater treatment plant) can be promising strains for removing pharmaceutical substances in a non-sterile municipal wastewater treatment without the adjustment of pH level. Therefore, these strains were used for further study. In the second stage, the pilot-scale system with a fungal fluidized bed pelleted bioreactor was developed. The results demonstrated a high potential to remove phosphorus from municipal wastewater efficiently and successfully under a batch scale experiment with non-sterile municipal wastewater, while the results from the fluidized bed bioreactor did not demonstrate any significant decrease of phosphorus. Additionally, the fluidized pelleted bioreactor was optimized to perceive bioaugmentation as a strategy with the frequent addition of fungal biomass. The results from the optimization process showed that bioaugmentation is a relatively efficient approach to build on fungi in the fluidized pelleted bioreactor. Furthermore, the results from the AI-based platform with modeling study showed that optimization of bioaugmentation with fungi increases the removal efficiency of pharmaceutical substances from non-sterile municipal wastewater. The author of this study showed that both the literature review and the results from the batch and pilot-scale experiments provided new knowledge that can be used for future investigations of wastewater treatment with fungi. The Thesis will help to improve and better understand the possible application of fungi in the municipal wastewater treatment process.

scholarly journals Harmless Treatment of Phenylhydrazine Hydrochloride Production Effluent: From Lab Scale to Pilot Scale

Water ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 608 ◽  
Author(s):  
Di Zhou ◽  
Xide Liu ◽  
Chuangqi Chen
Keyword(s):  
Wastewater Treatment ◽  
Treatment Process ◽  
New Technology ◽  
Pilot Scale ◽  
Ammonia Vapor ◽  
Extraction Technology ◽  
Wastewater Treatment Process ◽  
Phenylhydrazine Hydrochloride ◽  
Effective Technology ◽  
The Cost

More economical and effective technology is being developedin the wastewater treatment process to deal with the products of phenylhydrazine hydrochloride (PHH). Fixed ammonium in the effluent is converted to free ammonia by utilizing the neutralization reaction, and the sulfate is removed in the form of gypsum. Meanwhile, the toxic PHH is recycled according to the extraction and re-extraction technology. The raffinate phase is reused through boiling off ammonia vapor. The recovery rates of PHH reach 93.3% in the laboratory and 92.9% at the pilot scale, respectively. Compared with our previous work, the cost of the new technology is ~1/10 of the original, and the profit increases ~3.5-fold. Consequently, it has great potential to be applied to industrial production.

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