Implementation of a recycling water supply system at a plant for the production of mineral fertilizers

Summary

The introduction of recycling water supply is an important factor in reducing the negative impact of industrial enterprises on the environment. In 2007, experts from ECOS Group built and commissioned wastewater treatment facilities for a mineral fertilizer plant. Commissioning was preceded by full-fledged pilot tests in a pilot plant with a capacity of 1 m³/h. Preliminary pilot tests are a smart move in the implementation of projects for the construction of wastewater treatment facilities. The proposed process solutions were tested in the pilot plant: dosages of chemicals, subsequent clarification, filtration and sorption in gravity filters. As a result, the process parameters and the main indicators of the quality of raw wastewater were determined. The filtration efficiency in a ERSH filter was up to 80%. The necessity of raw wastewater balancing and the use of a biological treatment stage is shown. Upon completion of the work, the customer received reliable, easy-to-work treatment facilities; effluent discharge into the municipal sewer was ceased and the water consumption for the production needs was reduced.

Key words

coagulation , ion exchange , recirculating water supply , pilot tests , production of mineral fertilizer

Removing biologic fouling and mechanical deposits from recycling water supply systems by hydroimpulsive cleaning

Summary

The method of hydroimpulsive cleaning of the recycle water supply systems that prevents biologic fouling and mechanical deposits in heat-exchangers and pipelines at minimum material inputs and power consumption is presented. The results of the industrial-scale experimental studies are given. The method of hydroimpulsive cleaning provides for the elimination of heat-exchanging equipment outage for cleaning; reduction of raw material and power losses for cooling water pumping; improvement of the process unit efficiency by regular deposit removal and maintaining the maximum heat transfer coefficient of the heat-exchange apparatus.

Key words

recirculating water supply , heat transfer coefficient , biologic fouling , mechanical deposits , hydroimpulsive cleaning , heat-exchange apparatus

Local Treatment of Industrial Wastewater of the Samara Tank Factory Before Discharge into City Sewerage

Summary

A flow chart of local treatment of wash water of a hot metal galvanizing line making it possible to reuse them in production is proposed. It is established that in the course of waste water treatment according to the flow chart proposed the salt content in wash water does not increase and the total volume of water consumption and wastewater disposal of the factory is reduced. A possibility of using the filter-press for water clarification at reagent treatment is proved. The technology of reverse osmosis is used for organization of recirculating water supply.

Key words

filter-press , wash water , galvanic production , reverse osmosis unit , recirculating water supply