Acute toxicity assessment of TFT-LCD wastewater using Daphnia similis and Cyprinus carpio

Lee, Ya Ching; Whang, Liang Ming; Ngo, Minh Huy; Chen, Te Hao; Cheng, Hai

doi:10.1016/j.psep.2016.03.003

Cited by 13 publications

(3 citation statements)

References 32 publications

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“…As concerns the ecotoxicity on the water environment, the OECD (2012) reported that TMAH degrades quickly in water and has a scarce bio-accumulation capacity. Nevertheless, fatal accidents were described due to the high toxicity of TMAH, which is lethal in both concentrated and diluted formulations (at 2.38% by weight) (Lin et al 2010;Lee et al 2016;Mori et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Social life cycle assessment of an innovative industrial wastewater treatment plant

Serreli

Petti

Raggi

et al. 2021

Int J Life Cycle Assess

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Background The social impacts generated by industrial waste treatment processes have not been studied enough, as shown in the literature. Social life cycle assessment studies have mainly focused on the assessment of products and less on industrial waste, especially wastewater, although potentially relevant from an environmental point of view, and also from a social one for various stakeholders. Purpose This case study concerns the social assessment of an innovative technology to treat the wastewater of a microelectronics company. In order to produce electronic components and semiconductors, the company has to treat and dispose of relevant wastewater streams containing various toxic substances. The wastewater streams need to be treated in order to protect the eco-system, representing a high cost for the company and a potential impact on the environment. For this reason, the company developed a LIFE project to demonstrate the viability to decrease the burdens on water bodies. The positive outcome of the test on the pilot plant paved the way for the construction of the full-scale plant that will treat all the wastewater generated by the company. The objective of this paper is the socio-economic assessment of a full-scale plant designed to treat three different kinds of wastewater. Methods The assessment of socio-economic potential impacts of a new technology has been carried out through the PSILCA (Product Social Impact Life Cycle Assessment) database implementation to evaluate 65 social indicators of a wastewater treatment plant. Results The line with the highest impact is the one which treats tetramethylammonium hydroxide; this is because this wastewater flow is the most abundant (14 and 43 times greater than the other wastewaters, respectively). The most affected stakeholder is the Local Community, followed by the Actors of the Value Chain; in fact, the results referred to the functional unit considered exceed 300,000 medium risk hours in both cases. For the Local Community this result arises from the indicator “Contribution to environmental load,” which is understandable considering the object of the study since this indicator includes health effects. As far as the Value Chain Actors stakeholder is concerned, the two indicators most impacted are “Corruption” and “Social responsibility along the supply chain”. The analysis conducted has also shown that upstream has a fundamental relevance for the social risks detected. Conclusions Considering the current lack of studies on both environmental and social impacts of wastewater treatment, and the fact that Social Life Cycle Assessment has not been widely used in this field, as emerged from literature review, this work is the first use of the PSILCA database to assess an industrial wastewater plant. The use of a social life cycle assessment database allows the value chain of a product system to be considered: the results show that most of the overall social risk derives from upstream sectors.

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Section: Introductionmentioning

confidence: 99%

Social life cycle assessment of an innovative industrial wastewater treatment plant

Serreli

Petti

Raggi

et al. 2021

Int J Life Cycle Assess

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show abstract

“…The problem lies in the high toxicity for the biota, as demonstrated by various studies [1,2]. The exposure to TMAH causes harmful effects on human health, whether ingested or inhaled: being very corrosive is harmful to both the mucous membranes and the skin in general.…”

Section: Introductionmentioning

confidence: 99%

“…The acute Daphnia similis toxicity test demonstrated that the 48-h lethal concentration 50 (LC50) of TMAH is only 0.75 mg/L. The acute toxicity of N-NH 4 + to Daphnia similis varied with the pH of the collected wastewater: the 48h LC50 values were found to vary in the range of 18.5-155 mg/L from pH 7.0 to pH 6.5 [2]. Mori et al [4] also studied the TMAH effects on the aquatic environmental: the tests were carried out on seaweed and freshwater fish, in particular, the microalga Pseudokirchneriella subcapitata, the bacterium Vibrio fischeri, the fresh fish Oryziaslatipes (or rice fish) and the microcrustacean Daphnia magna.…”

Section: Introductionmentioning

confidence: 99%

Aerobic Treatment of Waste Process Solutions from the Semiconductor Industry: From Lab to Pilot Scale

et al. 2019

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Tetramethylammonium hydroxide (TMAH) is widely used as a solvent in the semiconductor industry. After the photo-impression process, it is necessary to remove the photoresist (PR) layer from the surface of the circuits; for this purpose, a TMAH solution is usually used. This chemical compound is highly toxic and corrosive and cannot be discharged into the environment. This study was carried out in collaboration with LFoundry (SMIC group), in order to prove the feasibility of biodegradation under aerobic conditions, using microorganisms coming from the LFoundry’s wastewater treatment plant (WWTP) at different operating conditions. The feed composition was modified in order to add a small but increasing amount of TMAH and PR. The aim was to verify if the increase of TMAH concentration was harmful to bacteria. The feed stream, containing TMAH and PR, was the only carbon source for the metabolism of the aerobic microorganisms. The results of this study demonstrated an effective biological degradation of TMAH and showed a total removal efficiency of more than 99.3%, with a final concentration of 7 mg/L. Moreover, the kinetic parameters of the Monod model were also calculated. The results obtained from the experimental campaign were used to design a pilot plant that will treat around 25 L/h of waste TMAH/PR solution.

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Long-term performance and acute toxicity assessment of scaled-up air–cathode microbial fuel cell fed by dairy wastewater

Marassi

Queiroz

Silva

et al. 2020

Bioprocess Biosyst Eng

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Acute toxicity assessment of TFT-LCD wastewater using Daphnia similis and Cyprinus carpio

Cited by 13 publications

References 32 publications

Social life cycle assessment of an innovative industrial wastewater treatment plant

Social life cycle assessment of an innovative industrial wastewater treatment plant

Aerobic Treatment of Waste Process Solutions from the Semiconductor Industry: From Lab to Pilot Scale

Long-term performance and acute toxicity assessment of scaled-up air–cathode microbial fuel cell fed by dairy wastewater

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