Modelling of organizational and technological parameters of the informational model of municipal infrastructure facilities subject to reorganization

Yunchina

2017

Abstract. Currently galvanic sludge is considered as one of the most dangerous wastes, which are formed during purification of galvanic wastewater. The slimes of galvanic production are the most toxic industrial waste and sources of heavy metals emitted into the environment. Galvanic sludge belongs to the third hazard class; these wastes need to be deposited in special landfills for toxic waste. These polygons are complex and require significant costs. In this regard, there is a need for such methods of purification of galvanic sewage sludge, which may be used in other industries or will have fourth class of hazard or below. This article compares the main methods of purification of galvanic waste waters in general and galvanic sludge in particular, currently introducing new techniques for treating industrial effluents. One of them considers treatment of galvanic waste water by means of suspensions of ferriferous hydrosol that is an electric generated coagulant derived from waste forming, steel wool, etc. There is a sort of experience already acquired in some countries how to use of ferropericlase.

Section: Chemical Methods Of Treatmentmentioning

confidence: 99%

“…In addition, ion exchange purification does not solve the problem of disposal of eluates. Another drawback of this method is the considerable investment and operating costs (high cost of reagent per unit of the remote metal) [16][17][18].…”

Section: Ion Exchange Methods Of Treatmentmentioning

confidence: 99%

Methods and solutions for galvanic waste water treatment

Yunchina

2017

“…1. Scheme of primary clarifier with bioflocculation chamber: 1 -inlet of waste water and sludge; 2 -distribution chamber; 3 -bioflocculation zone; 4 -perforated aerators; 5 -semisubmerged partition wall; 6 -submerged walls; 7 -low-rate mixer; 8 -protection shield; 9 -collection weir; 10 -thin-layer blocks After the bioflocculation waste water passes under the baffle zone of air separation, where the adhering air bubbles separated to prevent possible degradation of the sedimentation conditions [8].…”

Section: Methods Of Intensificationmentioning

confidence: 99%

Peculiarities of clarifiers’ reconstruction at waste water treatment plants

Kulakov

2017

Abstract. The article reveals the ways in which the reconstruction of clarifiers for wastewater treatment plant can be performed. One of the most common method is bioflocculation that means use of corresponding properties of excess activated sludge or biofilm, which both have in its composition so called extracellular biopolymers that determine the spatial structuring and bioflocculation of cell formations. Multiple researches showed that use of surplus sludge as bioflocculant provides increased efficiency of sedimentation in any waste water up to 85-90 % and reduce biochemical oxygen demand (BOD) in the clarified water by 40-50 %. The other method to be implemented for reconstruction of clarifying facilities is thin-layer modules to raise the efficiency of settling. Thin-layer modules can be used in a wide range of capacity of sewage works. The possibility of application depends on the structural size and condition of building structures, the amount of suspended solids and other parameters.

“…After anoxic tank the sludge mixture sequentially passes through the three aerobic reactor (AR), equipped with a system of fine-bubble aeration. The first and second AR is equipped with a floating feed for immobilization of biofilms (Figure 3), thus treatment goes by a combination of biomass: free-floating and attached [8,9,[19][20][21][22][23][24]. After aerobic reactors the sludge mixture enters the clarifier where the water is separated from sludge, which is pumped by airlift pumps back to the anaerobic reactor.…”

Section: Technologymentioning

confidence: 99%

Removal of nitrogen and phosphorous from domestic wastewater

Kulakov

2017

Abstract. This work is aimed at providing a deep cleaning from nitrogen and phosphorus at the requirements level for a small capacity waste water treatment plants with active sludge. The wastewater treatment technology includes: mechanical screen, anaerobic reactor, anoxic reactor, two aerobic reactors with floating media, aerobic reactor, clarifier, bioreactor, purification, filter, filter of tertiary treatment with the sorbent, ultraviolet disinfection facility. The sludge treatment includes aerobic stabilizer and facility of mechanical dewatering. The developed technology ensures deep purification of household waste waters from nitrogen and phosphorus. The degree of purification in the ammonium-ion reaches of 99.5 %. Efficiency of total nitrogen removal (the sum of ammonium, nitrite and nitrate nitrogen) is 85 %. The efficiency of biological purification of phosphates is 97.8 percent that is achieved without the use of coagulant. Requirements are met in most cases.