Innovations in the treatment of industrial wastewater Part 2

It can be grown in water with almost any concentration of contaminants. The more “food” for her in the wastewater, the faster the increase in the mass of plants. From experience, it was estimated that for the reservoir fecal sewage water of the village is the increase in the mass of water hyacinth up to 15 kg/day per m2.

On treatment of waste and sewage, as all higher aquatic plants, able to accumulate significant quantities of heavy metals (lead, mercury, copper, cadmium, Nickel, cobalt, tin, manganese, iron, zinc, chromium), and radionuclides (cesium, strontium, cerium, cobalt, etc.). However, their concentration in plant tissue can be in the hundreds (iron, strontium), thousands (mercury, copper, cadmium, cesium), hundreds of thousands of times (zinc, manganese) above their content in the water.

On the surface of the roots, which are especially strongly developed at formed selective microbial associations (bacteria, algae, protozoa, macroeconomic), contributing to a more active biological degradation and uptake of organic and mineral substances.

Under favorable temperature conditions of the hot climate in the discharged sewage waters rich in organic matter, e.g., sewage from farms, poultry houses, etc, shows a high rate of vegetative growth with production of biomass more than 250 tons per hectare of water surface per season.

During the growing season, increasing the green mass extracts from the solution of polluted waste water of numerous ingredients. Very actively extracted nitrogen, phosphorus, and their compounds, dissolved phenol, oil. The behavior of the water hyacinth during wastewater treatment varies depending on many factors such as a concentration of ingredients, a temperature of water and air, oxygen security, lighting, a length of the day.

Growing it is also possible to solve the problem of processing the sludge sediments of organic origin, due to which during one season of the bottom of the reservoir can be dredged at 30-50 cm.

Feature properties work that during wastewater treatment, this plant oxidizes and breaks down industrial and organic impurities, impurities of water to simple harmless elements with great speed and absorbs them as nutrition. The role of an oxidizing agent, in this case, takes the oxygen, which in excess produces Eichhorn. Clearing household and industrial drains from detrimental impurities, the plant in itself does not accumulate them, and “eats”, while the plant grows actively. The dirtier the pond, the faster the hyacinth grows and multiplies.If the purified water and eat nothing, engaged in dredging, that is, begins to process the available bottom sludge. And if not, it terminates the growing season.

Pathogens of the putrefactive row in the water are destroyed completely, suppressed aureus. Coli-index and a total microbial count are given to the values that meet the hygienic requirements of sanitary rules and norms of surface water protection from pollution (SanPiN № 4630-88) requirements for composition and properties of water of water objects of cultural and domestic water use.

In the second stage, treatment and disposal of sewage and polluting wastewater use of peat and sapropel sorbent (TSS). Passed through wastewater from the mechanical loss of organic and mineral impurities, macro – and micro – elements, thereby enriching a sorbent material.

At saturation of the sorbent them to the MCL, the sorbent is extracted and used as a pile of manure warming the mixture for urban and backyard landscaping, recultivation of technogenic disturbed soils, prevent wind erosion.

To continue the water purification process lay a new batch of the sorbent, etc.

The third stage of purification of sewage water involves the process of deposition of microparticles and residual of heavy metals and radionuclides, using the neutral organic coagulant in the ratio of 0.2–1.0 mg per 1 l of water.

Three-stage cleaning of sewage effluent on the proposed technology allows to reach the MPC water pollutants and reuse it for irrigation, discharge to natural bodies of water such as lakes, rivers or the sea.

We offer fixed and modular complexes portable permanent and seasonal sewage treatment medium (up to 5000 m3/day.) and small (up to 480 m3/day.) performance, modular and stationary design team (up to 2200 m3/day), check-inpatient (up to 24000 m3/day), or according to your specifications.

The cleaning modules using the technology of the Center for sapropel much less expensive (3-6 times) to conventional treatment plants and it is competing with them when used in small cities, towns, rural areas and at the enterprises of small and average productivity. Not require highly skilled personnel, expensive chemicals. Operating costs compared to existing treatment facilities below 3-4 times. Material – water hyacinth perpetuates itself.Peat-sapropelic sorbent after use is an excellent pile of manure warming Sands and fastening material.

Image result for industrial wastewater

It should be recalled that in a hot climate water hyacinth in the storage of fecally contaminated wastewater is growing rapidly, its access is formed, which is excellent raw material for the production of feed additives for pigs, cattle, fish, use it as fertilizer. Supplied with processing equipment cleaning module is highly profitable and pays for itself within the first years of operation. From experience running in an operation of the complexes, their return together with the production of feed amounted to more than 300%. For the purification of sewage and wastewater storage medium urban settlements in hot climates will need a cheque-stationary complex valued from $3.5 million to $11 million US.

For the development of the technology to the application and reducing its cost replication at various urban and rural settlements of the country, proposed to lay in one of settlements of the experimental complex to work on it all the process parameters, calculate the required amount of water hyacinth (), peat-sapropelic sorbent and neutral organic coagulant to prepare industrial equipment specification, training of local personnel to work on similar complexes throughout the country.The time of preparation of this experimental complex range from 16 to 26 months. The cost of the project is $5.5 million US (excluding delivery, installation, and commissioning). The cost of Kawasaki on the object of the first batch of water hyacinth, peat-sapropelic sorbent, and organic coagulant is calculated by the proposed project and based on the calculated data.

The efficiency of purification of sewage with the use of different methods:

  • The maximum initial concentrations of contaminants in the purified water by the proposed method and materials
  • Some indicators of efficiency of water purification using  and TSS
  • Changes in some indicators of purification of sewage using and TSS
  • The results of the analyses of domestic and industrial waste water after cleaning Eichhorn
  • Valid values for concentrations in wastewater cleaned with  and TSS

The process of extracting ingredients from wastewater using depending on the temperature and length of day.

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