Biohydrogen Production from Sewage Sludge by Dark Fermentation: The Effects of Adding Inoculum and Heat Pretreatment

Abstract The main requirement for efficient H 2 production is the availability of efficient microbial consortia in which H 2 -utilizing and non-H 2 -producing bacteria are suppressed. This study evaluates the H 2 production potentials from sewage sludge with and without pretreated anaerobic culture used as inoculum. Three different anaerobic cultures (mixed anaerobic sludge from CSTR tank reactor, fermented manure, and heat-treated fermented manure) were used as inoculum. Due to hydrolysis during heat treatment, organic matter concentration increased during fermentation. Compared to other operating conditions, heat-treated fermented manure as inoculum and sewage sludge as the substrate mixture had the highest hydrogen production. The results showed that heat pretreatment of inoculum should increase H 2 production potential

Aminophosphines Derived from N-Phenylpiperazine and N-Ethylpiperazine: Synthesis, Oxidation Reactions, and Molybdenum Complexes

WOS: 000297218100001Functionalized aminophosphine of the type Ph2PNR2 (1,2) have been synthesized by treating Ph2PCl with N-phenylpiperazine or N-ethylpiperazine. Oxidation of these ligands with aqueous hydrogen peroxide, elemental sulfur or selenium afforded the corresponding phosphine oxides 3,4, sulfides 5,6, and selenides 7,8 in good yields. The molybdenum complexes of the aminophosphines have been obtained. All new compounds were fully characterized by IR, NMR, and microanalysis, and the molecular structures of two representative compounds were determined by single-crystal X-ray crystallography. (C) 2011 Wiley Periodicals, Inc. Heteroatom Chem 22: 679-686, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/hc.20733TUBITAK [110T572]; Nigde University [FEB 2008/20]Partial support of this work by TUBITAK (project number 110T572) and Nigde University (project number FEB 2008/20) is gratefully acknowledged

Synthesis, crystal structure and spectroscopic studies of a mixed ligand copper (II) complex: trans-bis(succinimidato)-bis(benzylamino)Cu(II)

TAS, MURAT/0000-0002-2879-6501WOS: 000240223800009The molecules of the title compound, [Cu(C11H13N2O2)(2)], lie across centres of inversion in space group P2(1)/c and are linked by intermolecular N-H center dot center dot center dot O and C-H center dot center dot center dot O hydrogen bonds. The central Cu atom has a slightly distorted square-planar coordination comprised of four N atoms. Cu-N bond distances are 1.975(2) and 2.020(2) angstrom. The interplanar angle between the phenyl and succinimidato ring is 87.34(10)degrees

A study on behaviour, interaction and rejection of paracetamol, diclofenac and ibuprofen (PhACs) from wastewater by nanofiltration membranes

Non-steroidal anti-inflammatory drugs are frequently reported in drinking and treated waters. Membranes can be used to inhibit the passage of micropollutants (Pharmaceuticals) into water that can be further reused. In this study, two types of loose nanofiltration membranes, that usually are applied for large molecular weight organics, were tested for the filtration of selected small molecular weight drugs from synthetic wastewater. Effect of pH on membrane efficiency showed that behavior of drugs altered with changing pH. Results showed impressive treatment of drugs in the order, DIC (99.7%) > IBU (81.2%) > PARA (49%) along with TOC (95.3%) and COD (84%) removal. Interestingly, nanofiltration of wastewater containing IBU tablet increased to 90.2% as compared to pure drug (80.5%). Mixture of drugs showed decreased removal of DIC (23%) while removal rates for IBU and PARA increased to 17.1 and 67% respectively. Moderate to high rejection percentage was not due to the molecular sizes of the model drugs but hydrophobicity of drugs played rolePostprint (author's final draft

A study on behaviour, interaction and rejection of paracetamol, diclofenac and ibuprofen (PhACs) from wastewater by nanofiltration membranes

Non-steroidal anti-inflammatory drugs are frequently reported in drinking and treated waters. Membranes can be used to inhibit the passage of micropollutants (Pharmaceuticals) into water that can be further reused. In this study, two types of loose nanofiltration membranes, that usually are applied for large molecular weight organics, were tested for the filtration of selected small molecular weight drugs from synthetic wastewater. Effect of pH on membrane efficiency showed that behavior of drugs altered with changing pH. Results showed impressive treatment of drugs in the order, DIC (99.7%) > IBU (81.2%) > PARA (49%) along with TOC (95.3%) and COD (84%) removal. Interestingly, nanofiltration of wastewater containing IBU tablet increased to 90.2% as compared to pure drug (80.5%). Mixture of drugs showed decreased removal of DIC (23%) while removal rates for IBU and PARA increased to 17.1 and 67% respectively. Moderate to high rejection percentage was not due to the molecular sizes of the model drugs but hydrophobicity of drugs played rol