The forms of pollutants in different industrial wastewaters are very different, so it is impossible to use a unified wastewater treatment system during the treatment process, and "the right medicine" is needed.
One symptom is that industrial wastewater is wastewater with a high organic concentration, and it contains toxic and harmful substances that delay or completely inhibit the growth of microorganisms, resulting in poor biodegradability, which is particularly difficult to solve. After many companies have invested a large amount of treatment costs, the treated industrial wastewater still does not meet the relevant national emission standards, which has brought a lot of trouble to the companies.
Due to the poor biodegradability, it is not feasible to directly enter the biochemical treatment process. We need to pre-treat this kind of wastewater and use physical and chemical methods to first reduce its organic concentration and improve its biodegradability.
Iron-carbon composite micro-electrolysis technology is a low-pollution, low-cost high-concentration organic wastewater treatment technology, which is widely used in wastewater treatment in chemical, pharmaceutical and printing and dyeing industries.
Its principle is to use the extreme difference in the position of iron-carbon materials in the solution. The metal iron is corroded to form countless micro-primary cells. These micro-primary cells produce a large number of electrons and active reducing substances, which can reduce inorganic and organic pollutants in wastewater to form colloidal particles. They are further purified by adsorption, flocculation, precipitation and other actions to separate pollutants in the water body, thereby achieving the purpose of removing pollutants.
We use iron-carbon micro-electrolysis technology in many difficult-to-treat industrial wastewaters. It is an important link and a "good helper" for the stability of subsequent biochemical treatment processes.
A pharmaceutical wastewater cannot meet the discharge standards by using "anaerobic + aerobic", and the high-concentration, difficult-to-degrade organic wastewater discharged from it cannot be well removed. The project transformation added a set of iron-carbon micro-electrolysis equipment. The influent COD concentration exceeded 8000mg/L and the B/C value was 0.23. This equipment can reduce the COD concentration to below 3000mg/L, and the B/C value has been greatly improved to 0.38, which has a good pretreatment effect.
In addition to using iron-carbon micro-electrolysis technology alone, there are many cases that use the combined Fenton oxidation method or coupling to achieve better wastewater treatment effects.
There are three ways to couple the Fenton oxidation method: adding hydrogen peroxide to the iron-carbon micro-electrolysis treatment for Fenton reaction; adding hydrogen peroxide during the iron-carbon micro-electrolysis treatment process and reacting at the same time; first Fenton pre-oxidation, then iron-carbon micro-electrolysis treatment.
A chemical wastewater treatment project uses the method of first performing iron-carbon micro-electrolysis and then entering the Fenton oxidation device. The wastewater with an influent COD concentration of more than 15,000 mg/L has a good removal effect, and the final effluent COD concentration of the sewage treatment station is less than 400 mg/L.
Although the iron-carbon micro-electrolysis technology uses materials that are easy to obtain and meet the requirements of waste recycling, the equipment cost is low, it is widely used and simple to operate, but it also has some disadvantages: long-term operation is prone to hardening, and the amount of physical and chemical sludge is large.
When we use iron-carbon micro-electrolysis technology, we also need to pay attention to its control conditions. Its influencing factors include wastewater pH value, reaction time, iron filings type and particle size, iron-carbon ratio, aeration volume, etc.
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Shandong Longantai Environmental Protection Sci-tech Co., Ltd., established in 2005, focuses on energy-saving and compliant
treatment of industrial wastewater, wastewater recycling and reuse, and wastewater resource and energy recovery. The company
provides high-value comprehensive solutions and key equipment. It integrates research and development, manufacturing, process
design, project construction, and water services operation. Longantai has strong capabilities and a complete quality system in the
R&D and manufacturing of water treatment catalysts, critical water treatment equipment, wastewater resource recovery equipment,
and industrial energy recovery equipment.
Longantai company provides high-value-added comprehensive energy-saving and emission reduction solutions in major technological
and engineering applications such as industrial wastewater, refractory wastewater, high-salinity wastewater, high-concentration
wastewater treatment, energy-saving upgrades for wastewater treatment standards, wastewater recycling and reuse, and water quality
improvement for rivers and lakes. These solutions effectively improve resource utilization, reduce enterprise costs, and
contribute positively to green, low-carbon, and high-quality development.
Longantai places great emphasis on the role of research and development in its growth. The company currently holds over 50
invention patents, more than 10 utility model patents, 1 design patent, 1 first prize for provincial-level scientific and
technological progress, and 1 first prize for scientific and technological progress from the China Environmental Protection
Industry Association. Longantai has established industry-academia-research collaborations with several top domestic and
international universities and research institutions. Over the years, the company has been recognized with numerous honors,
including National High-Tech Enterprise, National "Little Giant" Enterprise for Specialized and New Technology, Provincial Gazelle
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and Medium-Sized Enterprise, Hidden Champion Enterprise, Provincial "One Enterprise, One Technology" R&D Center, and Provincial
Industrial Design Center.
Longantai is a leading domestic provider of water treatment solutions, a manufacturer of critical water treatment equipment, and a
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Longantai is a collaborative and open platform with a comprehensive innovation system, mature practical technologies, and advanced
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