Improving efficiency of transport fuels production by thermal hydrolysis of waste activated sludge

Abstract

Abstract. The article deals with issues of transport biofuels. Transport biofuels are an important element of a system of energy security. Moreover, as part of a system it is inextricably linked to the urban, rural or industrial infrastructure. The paper discusses methods of increasing the yield of biogas from anaerobic digesters at wastewater treatment plants. The thermal hydrolysis method was considered. The main advantages and drawbacks of this method were analyzed. The experimental biomass (from SNDOD-bioreactor) and high-organic substrate have been previously studied by respirometry methods. A biomethane potential of the investigated organic substrate has high rates because of substrate composition (the readily biodegradable substrate in the total composition takes about 85%). Waste activated sludge from SNDOD-bioreactor can be used for biofuel producing with high efficiency especially with pre-treatment like a thermal hydrolysis. Further studies have to consider the possibility of withdrawing inhibitors from waste activated sludge.

Bioreactor for wastewater treatment

“…After the bioreactors sewage goes to coagulation chamber, and then to thin-layer clarifier. A system for collection and pumping of sludge from secondary clarifier into bioreactor was assembled to prevent secondary contamination and excessive removal of sludge [5][6][7]. The facility was additionally equipped with an averaging tank needed for automated pumping of sewage for treatment that allows reducing of hydraulic load at the facility and creating good conditions for biomass [8].…”

“…6 Internal recycling form aerobic to anoxic zone, sludge recycle from secondary clarifier Provision of conditions for denitrification 7 Adjustment of coagulant dosage system (adding and mixing) Improvement of phosphorus removal efficiency 8…”

Research of polystyrene floating material application parameters for wastewater treatment

“…Maximum value is considered of 30%, otherwise application of floating feed may demand large costs [4]. As literature review shows, the implementation of floating media for wastewater treatment is not fully investigated yet [5][6][7][8]. The research was aimed to define if any positive impact happen in case of floating feed application for wastewater treatment.…”

Membrane bioreactors for treatment of galvanic wastewater

“…Ultrafiltration membranes have a wide range of applications in various industries. They are successfully applied in the processes of sewage treatment of machinery building, metallurgy and petroleum industries [2,3].…”

“…Efficiency of membrane methods means high quality of treatment, minimal use of chemical reagents, versatility and compactness of wastewater treatment plants. In some cases, membrane systems remain as the only possible option for the treatment of industrial wastewater [1][2][3].…”