Ecotoxicological impacts of surface water and wastewater from conventional and advanced treatment technologies on brood size, larval length, and cytochrome P450 (35A3) expression in Caenorhabditis elegans

: Many studies reported the application of natural coagulants in removing pollutants with the help of the coagulation process, and coagulants showed their efficiency in comparison to the literature available. Yet, the utilization or acceptance of these coagulants in treating industrial wastewater is very low. Thus, there is a need for a strategy for enhancing the potential usage of coagulants for water treatment, presenting prevailing options and efforts for the development of coagulants. The utilization of coagulants can be improved by showing their efficiency in comparison to the advanced treatment technologies available in the present scenario. The coagulation efficiency with natural coagulants can be enhanced by mongrelizing the coagulants with other coagulants, enhancing the purity during extraction procedures, and by coalescence of coagulants. However, the research on natural coagulants are quite encouraging, perception of sustainable assessment studies revealed that commercialization/acceptance of coagulants for treatment options are hindered by their applicability and feasibility in real-time applications, and utilization of coagulants ignore the socioeconomic, ecological and technical aspects. The present review mainly focuses on the issues related to natural coagulants for clarifying the uncertainties and simultaneously moving the water industries to be more sustainable.

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Copper complexation by dissolved organic matter from surface water and wastewater effluent

Ecotoxicology and Environmental Safety ◽

10.1016/j.ecoenv.2005.01.006 ◽

2005 ◽

Vol 61 (3) ◽

pp. 337-344 ◽

Cited By ~ 43

Author(s):

Vaishnavi Sarathy ◽

Herbert E. Allen

Keyword(s):

Organic Matter ◽

Surface Water ◽

Dissolved Organic Matter ◽

Wastewater Effluent ◽

Copper Complexation ◽

Water And Wastewater

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Isolation, characterization and epistasis of fluoride-resistant mutants of Caenorhabditis elegans.

Genetics ◽

10.1093/genetics/136.1.145 ◽

1994 ◽

Vol 136 (1) ◽

pp. 145-154

Author(s):

I Katsura ◽

K Kondo ◽

T Amano ◽

T Ishihara ◽

M Kawakami

Keyword(s):

Caenorhabditis Elegans ◽

Brood Size ◽

Normal Growth ◽

Fluoride Ion ◽

Wild Type ◽

Signal Transduction System ◽

Nematode Caenorhabditis Elegans ◽

C Elegans ◽

Class 1 ◽

Resistant Mutants

Abstract We have isolated 13 fluoride-resistant mutants of the nematode Caenorhabditis elegans. All the mutations are recessive and mapped to five genes. Mutants in three of the genes (class 1 genes: flr-1 X, flr-3 IV, and flr-4 X) are resistant to 400 micrograms/ml NaF. Furthermore, they grow twice as slowly as and have smaller brood size than wild-type worms even in the absence of fluoride ion. In contrast, mutants in the other two genes (class 2 genes: flr-2 V and flr-5 V) are only partially resistant to 400 micrograms/ml NaF, and they have almost normal growth rates and brood sizes in the absence of fluoride ion. Studies on the phenotypes of double mutants showed that class 2 mutations are epistatic to class 1 mutations concerning growth rate and brood size but hypostatic with respect to fluoride resistance. We propose two models that can explain the epistasis. Since fluoride ion depletes calcium ion, inhibits some protein phosphatases and activates trimeric G-proteins, studies on these mutants may lead to discovery of a new signal transduction system that controls the growth of C. elegans.

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The Caenorhabditis elegans TDRD5/7-like protein, LOTR-1, interacts with the helicase ZNFX-1 to balance epigenetic signals in the germline

10.1101/2021.06.18.448978 ◽

2021 ◽

Author(s):

Elisabeth A Marnik ◽

Miguel Vasconcelos Almeida ◽

P Giselle Cipriani ◽

George Chung ◽

Edoardo Caspani ◽

...

Keyword(s):

Caenorhabditis Elegans ◽

Small Rna ◽

Small Rnas ◽

Brood Size ◽

Homologous Proteins ◽

P Granules ◽

Transposon Silencing ◽

Tudor Domain ◽

Germ Granules

LOTUS and Tudor domain containing proteins have critical roles in the germline. Proteins that contain these domains, such as Tejas/Tapas in Drosophila, help localize Vasa to the germ granules and facilitate piRNA-mediated transposon silencing. The homologous proteins in mammals, TDRD5 and TDRD7, are required during spermiogenesis. Until now, proteins containing both LOTUS and Tudor domains in Caenorhabditis elegans have remained elusive. Here we describe LOTR-1 (D1081.7), which derives its name from its LOTUS and Tudor domains. Interestingly, LOTR-1 docks next to P granules to colocalize with the broadly conserved Z-granule helicase, ZNFX-1. LOTR-1's Z-granule association requires its Tudor domain, but both LOTUS and Tudor deletions affect brood size when coupled with a knockdown of the Vasa homolog glh-1. In addition to interacting with the germ-granule components WAGO-1, PRG-1 and DEPS-1, we identified a Tudor-dependent association with ZNFX-1. Like znfx-1 mutants, lotr-1 mutants lose small RNAs from the 3' ends of WAGO and Mutator targets, reminiscent of the loss of piRNAs from the 3' ends of piRNA precursor transcripts in mouse Tdrd5 mutants. Our work suggests that LOTR-1 acts in a conserved mechanism that brings small RNA generating mechanisms towards the 3' ends of small RNA templates or precursors.

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Management of wastewater trough theatre

5th International Conference on Higher Education Advances (HEAd'19) ◽

10.4995/head19.2019.9162 ◽

2019 ◽

Author(s):

Kristina Tihomirova ◽

Linda Mezule

Keyword(s):

Wastewater Treatment ◽

Teaching Method ◽

Sewage Treatment ◽

Student Knowledge ◽

Cooperation Model ◽

Treatment Technologies ◽

Water And Wastewater ◽

Active Communication ◽

The University ◽

Industrial Sewage

Compulsory study course on wastewater treatment and sewage systems contains lectures, classroom calculations, technical project and laboratory practicum. The course is addressing not only the developing skills in wastewater treatment technologies but also provides preparation of professionals that can communicate with institutions involved in water and wastewater sector. Over the years it has been observed that even after receiving the most sophisticated knowledge and highest markings, students often lack skills in practical communication with industry and implementation of theoretical knowledge in praxis. Here we describe student-centred teaching method that is based on the activities that are similar to theatre and allow: (i) the teacher to find and understand the weaker places in student knowledge gained during the semester; (ii) the students to form professional skills during the active communication with colleagues and mentors from industry. The students work in several groups “INDUSTRY”, “MUNICIPALITY” and EXPERTS”, try to find better solution for industrial sewage treatment and cooperation model with the municipality and present their results. After 2 years of the modernisation and adjustment, the training course has created an interest not only from student side but also from the industry representatives that are interested in communication with the new specialists and develop strong contacts with the university.

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The Impact of Advanced Treatment Technologies on the Energy Use in Satellite Water Reuse Plants

Water ◽

10.3390/w12020366 ◽

2020 ◽

Vol 12 (2) ◽

pp. 366 ◽

Cited By ~ 3

Author(s):

Jonathan R. Bailey ◽

Sajjad Ahmad ◽

Jacimaria R. Batista

Keyword(s):

Energy Consumption ◽

Water Reuse ◽

Energy Use ◽

Additional Treatment ◽

Advanced Treatment ◽

World Population ◽

Water Reclamation ◽

Treatment Processes ◽

Treatment Technologies ◽

The Impact

With an ever-increasing world population and the resulting increase in industrialization and agricultural practices, depletion of one of the world’s most important natural resources, water, is inevitable. Water reclamation and reuse is the key to protecting this natural resource. Water reclamation using smaller decentralized wastewater treatment plants, known as satellite water reuse plants (WRP), has become popular in the last decade. Reuse plants have stricter standards for effluent quality and require a smaller land footprint (i.e., real estate area). They also require additional treatment processes and advanced treatment technologies. This greatly increases the energy consumption of an already energy intensive process, accentuating even more the nexus between energy use and wastewater processing. With growing concerns over the use of nonrenewable energy sources and resulting greenhouse gas (GHG) emissions, WRPs are in need of energy evaluations. This paper contrasts the energy consumption of both conventional and advanced treatment processes in satellite WRPs. Results of this research provide a means for engineers and wastewater utilities to evaluate unit processes based on energy consumption as well as a foundation for making decisions regarding the sustainability of using advanced treatment technologies at reuse facilities.

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Recent Advances in Water and Wastewater Treatment with Emphasis in Membrane Treatment Operations

Water ◽

10.3390/w11010045 ◽

2018 ◽

Vol 11 (1) ◽

pp. 45 ◽

Cited By ~ 4

Author(s):

Anastasios Zouboulis ◽

Ioannis Katsoyiannis

Keyword(s):

Drinking Water ◽

Water Reuse ◽

Water And Wastewater Treatment ◽

Fouling Control ◽

Treatment Processes ◽

Research Findings ◽

Treatment Technologies ◽

Water And Wastewater ◽

Membrane Treatment

The present Special Issue brought together recent research findings from renowned scientists in this field and assembled contributions on advanced technologies that have been applied to the treatment of wastewater and drinking water, with an emphasis on novel membrane treatment technologies. The 12 research contributions highlight various processes and technologies that can achieve the effective treatment and purification of wastewater and drinking water, aiming (occasionally) for water reuse. The published papers can be classified into three major categories. (a) First, there are those that investigate the application of membrane treatment processes, either directly or in hybrid processes. The role of organic matter presence and fouling control is the main aim of the research in some of these studies. (b) Second, there are studies that investigate the application of adsorptive processes for the removal of contaminants from waters, such as arsenic, antimony, or chromate, with the aim of the efficient removal of the toxic contaminants from water or wastewater. (c) Lastly, there are studies that include novel aspects of oxidative treatment such as bubbleless ozonation.

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