November 3, 2017

Disinfection of wastewater

Disinfection is a complex process of destroying parasites that spread invasive diseases (caused by helminth parasites and arthropods).

Sanitary regulations and rules set requirements for deworming/ disinfection. The word “disinfection” came from Latin words “invasio” (invasion) and “des” (from).

The quality wastewater treatment is a pressing issue in most countries. The reason is a growing number of gastrointestinal diseases associated with contaminated water that has increased...

March 13, 2017

Wastewater Treatment with Vortex Layer Device

Wastewater Treatment. Over the years, there has been a growing anthropogenic impact on water resources. The main reason is the careless attitude of man to nature, resulting in increasing concentration of pollutants in the water every year, unauthorized dumping of washing water from ships, as well as accidental discharges from industrial wastewater from plants.

During the reception of cargo, a ship’s compartments are washed with water that...

March 13, 2017

Mechanical Treatment of Wastewater to Remove Petroleum

Mechanical Treatment of Wastewater. Among the worst environmental problems is a widespread petroleum pollution of water bodies, coastal areas and soil, due to its increased production, transportation and refining.

Statistics estimate 2% of oil losses during transportation. The losses cannot be avoided during storage of fuels and lubricants on tank farms and oil processing enterprises, which, in accordance with the existing requirements should not be more than...

March 13, 2017

Methods for Wastewater Treatment

Methods for Wastewater Treatment. The industrial enterprises cause environmental pollution with exhaust gases, wastewater and solid industrial waste.

The bulk of waste of the I-IV class is the combustion residue, animal and plant waste as well as industrial wastewater resulting from wastewater treatment. The large amounts of such waste are due to the outdated technologies that make it impossible to efficiently and quickly purify water. Also there...

March 13, 2017

Wastewater Treatment Unit to Remove Hexavalent Chromium and Other Heavy Metals

Wastewater Treatment Unit. The process line for wastewater treatment from chromium, lead, nickel, iron and other heavy metals can be equipped with the AVS-100 (150) electromagnetic nano-mill by GlobeCore. It significantly reduces reagent consumption, provides better cleaning and make the process continuous.

The main feature of the electromagnetic nano-mill is the intensive mixing of materials with the help of ferromagnetic particles affected by an electromagnetic field....

March 13, 2017

Industrial Wastewater Treatment Using an Alternating Electromagnetic Field

Industrial Wastewater Treatment. Environmental pollution is a global problem requiring effective and integrated solutions. An important part of protecting the environment is keeping the water resources pure and clean, when they are contaminated with heavy metals, acids, alkalis and other industrial wastes.

The existing wastewater treatment technologies are not always reliable and efficient, requiring the development of new technologies and new generation devices that can overcome these...

March 13, 2017

Wastewater Treatment Based on Electromagnetic Nano-mill

Environmental problems are vitally important and require complex approaches. The most urgent task is improving the water resources of the planet which are polluted by industrial and agricultural waste. This problem is solved by wastewater treatment systems.

Currently wastewater treatment mainly uses ion exchange, reagent and electrochemical methods, which are designed to deal with such harmful substances as chromium, cadmium, nickel, copper, etc. But despite the progress,...

March 13, 2017

Improving the Cracking Resistance of Concrete Using Electromagnetic Nano-mill

For more than 100 years, scientists around the world explored the cracking resistance of concrete. The central scientific problem of this research is to establish the patterns of crack development and their effect on the bearing capacity of the element. There are two types of cracks typical for reinforced concrete structures:

The first type of cracks is associated with plastic properties of concrete.

These cracks appear during the...

Using Biosorbents to Remove Oil From Water

Remove Oil From Water. Dumping of insufficiently treated household and industrial wastewater contaminates water, poisons water bodies and destroys ecosystems. Among the substances contaminating oceans, seas, lakes and rivers of the planet, various oil products hold a leading position.

The amount of oil products dumped into the ocean, but different accounts, varies from 5 to 10 million tons annually. The main sources of such contamination are crude...

Purification of Household Wastewater

Household wastewater goes into sewage from kitchens, bathrooms etc. Such wastewater can be treated using mechanical and biological methods.

Purification of wastewater is a complex multistage process, which begins in the input chamber. Then the water is filtered mechanically to remove garbage etc. The liquid phase is separated from the solid phase, by using settling tanks, grates, sand traps etc. Mechanical influence is only a preliminary stage...


Chemical Purification of Wastewater

Chemical Purification of Wastewater. Water going into the sewage system must be processed to remove heavy metals and other hazardous contaminants. This purification requires a complex of measures.

Wastewater can be classified by origin:

  • industrial;
  • household;
  • precipitation (snow, ice etc).

Chemical purification of wastewater implies the use of special reagents which react the contaminants. Such reagents are chlorine, potassium permanganate, chlorine and sulfur...

January 6, 2017

Methods of Dry Construction Mix Modification

The high quality of the modern construction mixes is impossible without using special modifying additives. They allow to adjust the properties of the material, making solutions with the required qualities for use in any (even extreme) conditions.

A relatively large amount of such additives is available in the market today. These are mostly surfactants, electrolytes, polymers etc. The history of modifying construction materials begins in the ancient...

Modern Methods of Wastewater Treatment

When selecting methods and processes for treatment of industrial wastewater, several factors must be considered, such as the amount and nature of waste, concentration and type of contaminants, requirements treatment results as well as the possibility of using this water in water supply systems.

In recent years, chemical, ion-exchange and electrochemical methods have come into wide use. Chemical reagent methods are mostly used for treatment of water...

Wastewater treatment technology

Development of wasteless technology is an important measure to protect the environment from anthropogenic loads by separating contaminants from water, and possibly to recycle the contaminants for use in technology processes.

This can be achieved by using modern efficient technologies. However, wastewater has several types of contaminants and so using only technology process in real conditions might be economically problematic or too cumbersome.

Wastewater is most...

Intensification of Wastewater Treatment in Food Production

Intensification of Wastewater Treatment. Treatment of wastewater, including that in food production industry, is a serious problem. Today, industrial processing of agricultural materials without consideration of environmental concerns causes contamination not only of the atmosphere and water bodies, but also the soil, ruining its fertility. Sugar, alcohol, yeast and meat processing facilities are often surrounded by ‘dead zones’, contaminated due to inefficient treatment of waste.

Chemical and...

Neutralization of Wastewater

Neutralization of wastewater is required before releasing it into water bodies or reuse in various technology processes. Wastewater containing acids or alkali must be neutralized.

Water with pH of 6.5 – 8.5 are considered neutral. Neutralization is required where pH is below 6.5 and above 8.5. Practically, the highest danger is posed by acidic wastewater containing salts of heavy metals.

Neutralization is a chemical reaction between...

Removal of Phosphorus From Wastewater: a Review of Methods

Removal of Phosphorus From Wastewater. Wastewater generated by the industry and agriculture in many cases contains large amounts of ammonium and phosphorus. Insufficient removal of these from wastewater is a source of contamination of ground and surface water and causes eutrophication of water bodies. Biogenic elements cause proliferation of cyanobacteria. Excessive activity of algae degrades operation of water intakes and fishing, reduces the hydraulic parameters of the flow...

Livestock Farm Wastewater Treatment

Farm Wastewater Treatment. The degree of contamination of wastewater is characterized by the amount of mineral, organic and bacterial materials solved or unsolved in the water.

Wastewater is treated by mechanical, chemical, physical or biological methods.

Biological processes involve oxidation of organic substances in waste water in the form of suspensions, colloids and solutions by microbes.

There are two type of facilities for biological treatment...

Biochemical Treatment of Wastewater: Anaerobic Process

Biochemical Treatment of Wastewater. Anaerobic methods involve treatment of wastewater without access to oxygen. Instead, methane fermentation is used. The advantage of this method is the high level of converting contaminants with the formation of biogas byproduct.

Wastewater contaminated by nitrogen compounds are converted in the process of denitrification by microbes (such as Paracoccus denitrsficans) with formation of gaseous oxide (NO2) and molecular nitrogen (N2) or ammonia...

Wastewater Treatment: Aerobic Process

Aerobic process are based on the use of microbes which require constant supply of oxygen and the temperature of 20-40°С. Disruption of oxygen supply and temperature changes the composition and number of microbes. Purification of wastewater in aerobic conditions is performed by biofilters or by cultivation of microbes in biological sludge, in which biocenosis consists of various groups of organisms(bacteria, worms, fungi, algae etc). Biological sludge is an...

обновлено: February 3, 2016 автором: oksana