Optimization of organic-containing wastewater and sludge treatment systems

An enzymatic-cavitation method for the biological treatment of organic-containing wastewater and sludge treatment has been developed, according to which the air supply is carried out not by compressors, but rather ejectors. In addition, low-intensity cavitation is provided. The biological treatment of the wastewater has been performed at a temperature of 10–42°C. The energy consumption of the process is reduced by six times, while the time of sludge treatment is 8–10 h at a pressure of 0.30–0.35 MPa. The treated sludge has some adsorptive properties

Calculation of nuclear spin-dependent parity-nonconserving amplitude for (7s,F=4) --> (7s,F=5) transition in Fr

Many-body calculation of nuclear spin-dependent parity-nonconserving amplitude for (7s,F=4) --> (7s,F=5) transition between hyperfine sublevels of the ground state of $^{211}$Fr is carried out. The final result is <7s,F=5 ||d_PNC|| 7s,F=4> = -0.49 10^{-10} i kappa a.u., where kappa is the dimensionless coupling constant. This is approximately an order of magnitude larger than similar amplitude in Cs. The dominant contribution to kappa is associated with the anapole moment of the nucleus.Comment: 4 pages, submitted to Phys.Rev.

Capillary-sorption effects in soil after chieselling and introduction of non-traditional fertilizers (meliorants)

The movement of moisture in the soil is filtering, which is written in the form of Darcy's law. Water pressure in the soil is the amount of capillary-sorption, gravity and osmotic pressure, the latter is insignificant and can be ignored. The gravitational pressure is always present, its vector is directed downward, and the vector of capillary-sorption pressure can be directed up, down, or be absent altogether. At the direction of action of capillary-sorption pressure significantly affected by the initial moisture content of the soil, deep (chisel) and unconventional tillage fertilizer (meliorant) is sewage sludge, which has adsorption properties and amendments to the soil surface as a mulch layer. Chieselling of soil is accompanied by the formation of saltwater bottom of the furrow. Subsurface ridges deflect vector capillary-sorption pressure and contribute to dehydration of the soil untouched. After chieselling on waterlogged soils in wide rows of cultivated crops have on the ridges. Chieselling of soil and sediment entering are performed once in 2-3 years. The depth of plowing makes 50-60 cm, the width of row-spacing makes 70-80 cm, making sludge dose of 20-25 t/ha.Движение влаги в почве – это фильтрация, которая записывается в виде закона Дарси. Давление влаги в почве – это сумма капиллярно-сорбционного, гравитационного и осмотического давлений, последнее незначительно и его можно не учитывать. Гравитационное давление всегда присутствует, его вектор направлен вниз, а вектор капиллярно-сорбционного давления может быть направлен вверх, вниз или вовсе отсутствовать. На направление действия капиллярно-сорбционного давления существенное влияние оказывают исходная влажность почвы, глубокая (чизельная) обработка почвы и нетрадиционное удобрение-мелиорант – осадок сточных вод, обладающий адсорбционными свойствами и вносимый на поверхность почвы в виде мульчирующего слоя. Чизелевание почвы сопровождается формированием гребнистого дна борозды. Внутрипочвенные гребни отклоняют вектор капиллярно-сорбционного давления и способствуют обезвоживанию нетронутой почвы. После чизелевания на переувлажнённых почвах ряды широкорядных пропашных культур располагают над гребнями. Чизелевание почвы и внесение осадка выполняют один раз в 2-3 года. Глубина пахоты 50-60 см, ширина междуследия – 70-80 см, доза внесения осадка – 20-25 т/га

Extraction of Kaon Formfactors from K^- -> mu^- nu_mu gamma Decay at ISTRA+ Setup

The radiative decay K->mu nu gamma has been studied at ISTRA+ setup in a new kinematical region. About 22K events of K^- -> mu^- nu_mu gamma have been observed. The sign and value of Fv-Fa have been measured for the first time. The result is Fv-Fa=0.21(4)(4).Comment: 11 pages, 21 figures, submitted to Phys. Lett.

Search for light pseudoscalar sgoldstino in K- decays

A search for the light pseudoscalar sgoldstino production in the three body K- decay K-->pipi0P has been performed with the ISTRA+ detector exposed to the 25 GeV negative secondary beam of the U70 proton synchrotron. No signal is seen. An upper limit for the branching ratio Br(K->pipi0P), at 90% confidence level, is found to be around 9*10**-6 in the effective mass m(P) range from 0 till 200 MeV, excluding the region near m(pi0) where it degrades to 3.5*10**-5.Comment: 10 pages, LATEX, 8 EPS figures, revised version, to be published in Phys.Lett.

High statistic measurement of the K- -> pi0 e- nu decay form-factors

The decay K- -> pi0 e- nu is studied using in-flight decays detected with the ISTRA+ spectrometer. About 920K events are collected for the analysis. The lambda+ slope parameter of the decay form-factor f+(t) in the linear approximation (average slope) is measured: lambda+(lin)= 0.02774 +- 0.00047(stat) +- 0.00032(syst). The quadratic contribution to the form-factor was estimated to be lambda'+ = 0.00084 +- 0.00027(stat) +- 0.00031(syst). The linear slope, which has a meaning of df+(t)/dt|_{t=0} for this fit, is lambda+ = 0.02324 +- 0.00152(stat) +- 0.00032(syst). The limits on possible tensor and scalar couplings are derived: f_{T}/f_{+}(0)=-0.012 +- 0.021(stat) +- 0.011$(syst), f_{S}/f_{+}(0)=-0.0037^{+0.0066}_{-0.0056}(stat) +- 0.0041(syst).Comment: 11 pages, 8 figures. Accepted by Phys.Lett.

Adatoms in Graphene

We review the problem of adatoms in graphene under two complementary points of view, scattering theory and strong correlations. We show that in both cases impurity atoms on the graphene surface present effects that are absent in the physics of impurities in ordinary metals. We discuss how to observe these unusual effects with standard experimental probes such as scanning tunneling microscopes, and spin susceptibility.Comment: For the Proceedings of the "Graphene Week 2008" at the ICTP in Trieste, Italy. 8 pages, 8 figure

Search for Heavy Neutrino in K->mu nu_h(nu_h-> nu gamma) Decay at ISTRA+ Setup

Heavy neutrino nu_h with m_h < 300MeV/c^2 can be effectively searched for in kaon decays. We put upper limits on mixing matrix element |U_mu_h}|^2 for radiatively decaying nu_h from K->mu nu_h (nu_h -> nu gamma) decay chain in the following parameter region: 30MeV/c^2 < m_h < 80MeV/c^2; 10^{-11}sec < tau_h < 10^{-9}sec. For the whole region |U_{mu h}|^2 < 5 x 10^{-5} for Majorana type of nu_h and | U_{\mu h}|^2 < 8 x 10^{-5} for the Dirac case.Comment: Published in Phys. Lett.

The color gauge invariance and a possible origin of a mass gap in QCD

The general scale parameter, having the dimensions of mass squared, is dynamically generated in the QCD gluon sector. It is introduced through the difference between the regularized full gluon self-energy and its value at some finite point. It violates transversality of the full gluon self-energy. The Slavnov-Taylor identity for the full gluon propagator, when it is given by the corresponding equation of motion, is also violated by it. So in order to maintain both transversality and the identity it should be disregarded from the very beginning, i.e., put formally zero everywhere. However, we have shown how to preserve the above-mentioned identity at non-zero mass squared parameter. This allows one to establish the structure of the full gluon propagator when it is explicitly present. Its contribution does not survive in the perturbation theory regime when the gluon momentum goes to infinity. At the same time, its contribution dominates the structure of the full gluon propagator when the gluon momentum goes to zero. We have also proposed a method how to restore transversality of the relevant gluon propagator in a gauge invariant way, while keeping the mass squared parameter "alive".Comment: 20 pages, 1 figure, no tables, some final additional material is added minor correction introduced and references rearrange