Physical, chemical and microbiological efficiencies of Sewage Treatment Plants (STPs) located in Delhi's watershed in context of different treatment technologies employed in these plants have been determined. There were in all seventeen STPs treating domestic wastewater which were studied over a period of 12 months. These STPs were based on Conventional Activated sludge process (ASP), Extended aeration (Ex. Aeration), physical, chemical and biological removal treatment (BIOFORE) and oxidation pond treatment process. Results suggests that except "Mehrauli" STP which was based on Extended aeration process and "Oxidation pond", effluents from all other STPs exceeded FC standard of 10(3) MPN/100 ml for unrestricted irrigation criteria set by National river conservation directorate (NRCD). Actual integrated efficiency (IE(a)) of each STP was evaluated and compared with the standard integrated efficiency (IE(s)) based upon physical, biological and microbiological removal efficiencies depending upon influent sewage characteristics. The best results were obtained for STPs employing extended aeration, BIOFORE and oxidation pond treatment process thus can be safely used for irrigation purposes.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1007/s10661-008-0356-9 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Historical soil compaction impairs biogeochemical cycling in restored tidal marshes through reduced groundwater dynamics.
Sci Total Environ
December 2024
ECOSPHERE, Department of Biology, University of Antwerp, Wilrijk, Belgium.
Tidal marshes are often restored on compact agricultural soil that limits tidally induced groundwater dynamics and soil aeration after restoration. We hypothesized that impaired soil aeration affects biogeochemical cycling and leads to altered porewater nutrient concentrations in restored tidal marshes. We studied soil hydraulic properties, groundwater dynamics and porewater nutrient concentrations (nitrogen, phosphorus and dissolved silica) over the course of one year in a natural and a restored freshwater tidal marsh in the Scheldt estuary, Belgium.
View Article and Find Full Text PDFChanges in antibiotic resistance patterns of Gram-negative bacilli across three different wastewater treatment plants in northwest Algeria; first comparative study.
Microb Pathog
December 2024
Laboratory of Research in Geo-Environment and Development of Spaces (LGEDE), Department of Biology, University of Mustapha Stambouli, BP 763, 29000, Mascara, Algeria.
Changes in antibiotic resistance of bacteria in three different wastewater treatment plants (WTP) were investigated to determine their role they play in the dissemination of multidrug resistant bacteria (MDR). Water samples were collected from downstream of three (WTP) from where pollution parameters were detected and high-performance Liquid chromatography (HPLC) coupled with an ultraviolet (UV) detector was used to measure antibiotic residues. In addition, 88 bacilli Gram-negative (BGN) were collected; activated sludge, aerated lagoons and natural lagoons, and tested for resistance against 18 βeta-lactam antibiotics.
View Article and Find Full Text PDFStudy of the Photophysical Properties and the DNA Binding of Enantiopure [Cr(TMP)(dppn)] Complex.
Inorg Chem
December 2024
School of Chemistry, University College Dublin, Dublin 4 D04 V1W8, Ireland.
The preparation, electrochemistry and photophysical properties of a heteroleptic chromium(III) polypyridyl complex [Cr(TMP)(dppn)] () containing two 3,4,7,8-tetramethyl-1,10-phenanthroline (TMP) ligands and the π-extended benzodipyrido[3,2-a:2',3'-]phenazine (dppn) ligand are reported. The visible absorption spectrum of reveals distinct bands between 320 and 420 nm characteristic of dppn-based ligand-centered transitions, with found to be nonemissive in aqueous solution but weakly luminescent in aerated acetonitrile solution. Transient visible absorption (TrA) spectroscopy reveals that 400 nm excitation of leads to initial population of a ligand-to-metal charge transfer (LMCT) state which evolves within tens of ps to form a dppn-localized intraligand (IL) state which persists for longer than 7 ns and efficiently sensitizes singlet oxygen.
View Article and Find Full Text PDFEffect of processing parameters on characteristics of biodegradable extended-release microspheres containing leuprolide acetate.
Drug Dev Ind Pharm
December 2024
Faculty of Pharmaceutics and Pharmaceutical technology, Hanoi University of Pharmacy, Hanoi, Vietnam.
Objective: Poly(lactic--glycolic acid) microsphere containing leuprolide acetate - an extended-release drug delivery system whose characteristics (i.e. loading capacity, particle size and initial burst phase) depend on processing parameters.
View Article and Find Full Text PDFAdaptive photoluminescence through a bioinspired antioxidative mechanism.
Chem Sci
October 2024
Universität Münster, Institut für Anorganische und Analytische Chemie Corrensstraße 28/30 48149 Münster Germany
Article Synopsis
- Transition metal complexes are used as luminescent probes in fields like optoelectronics and biomedicine, but their effectiveness is hindered by issues like photobleaching and photooxidative stress.
- The research introduces ascorbic acid (vitamin C) as a way to prevent photobleaching in a new Pt(II) complex, showing that it can enhance luminescence by scavenging harmful oxygen produced during exposure to light.
- This method of oxidative protection is adaptable and has potential applications in other coordination compounds, improving the stability of luminophores for broader use in scientific and technological fields.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!