1,720,964 research outputs found
I metalli pesanti nelle acque di scarico urbane e il loro destino negli impianti di depurazione
No full textMonitoraggio e verifica di funzionamento di un impianto MBR al servizio di un’azienda ricettiva turistica
No full textProcess improvement and energy saving in a full scale wastewater treatment plant: air supply regulation by a fuzzy logic system
No full textAchieving good performance in air supply control is an important goal in the management of wastewater treatment plants,whose highly nonlinear behaviour makes the application of conventional control techniques problematic. This paper presents the development and experimentation of a fuzzy logic system for air supply regulation in a full scale municipal wastewater treatment plant. The system is composed of two main modules, one devoted to continuously adjusting the DO set point on the basis of the current effluent NH4+-N concentration (on-line measurement), and the other devoted to achieve the DO set point by controlling air supply devices. The experiment was carried out on the plant for about one year, leading to significant advantages in terms of both process stability and energy saving
Method and device for controlling the biological process in waste-water treatment plants
No full textA method and a device for continuously controlling the supply of oxygen to waste waters in the oxidation tank of a biological purifying plant, wherein the waster waters flowing continuously are subjected to aeration by blowing pressurized air. The method provides for substantially continuous regulation of the flow rate of air blown into the waste waters with at least a first control level which substantially continuously modifies the set point of the concentration of dissolved oxygen in the waste waters
Rimozione di metalli pesanti e microinquinanti organici in impianti di depurazione municipali
No full textImpatto ambientale delle acque meteoriche di dilavamento
No full textManuale di Ingegneria Ambientale, vol.
Removal of endocrine disrupting compounds from wastewater treatment plant effluents by means of advanced oxidation
No full textMunicipal sewage and WWTP effluents are considered to be a major source of pollution,
regarding the occurrence of endocrine disrupting compounds (EDCs) in the environment.
Although removal potential of many EDCs by conventional WWTPs is recognised, literature data
are not easily comparable. Besides, in order to reach very low concentrations, a further
treatment might be sometimes required. Positive results can be achieved by tertiary chemical
oxidation; nevertheless, technical-economic suitability is still to be fully demonstrated. In this
work, two estrogen-like susbstances were considered: nonylphenol (NP) (and its parent
compounds) and bisphenol A (BPA). The experimental work was conducted at Verona (Northern
Italy) WWTP (370,000 p.e.): after a 15 days sampling campaign, which was carried out in order to
calculate mass balance of target compounds, chemical oxidation tests were performed on
effluent by means of UV/H2O2 process and ozonation. Technical-economic feasibility of these
solutions is discussed
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