An Overview of Urban & Municipal,Landfill leachate Wastewater Treatment:

Challenge & Solutions In Urban Wastewater Treatment

Wastewater from Humans & Human Activities: Contamination & Impacts

Water is essential to sustain human life, promoting sustainable economic development, and preserving the health of ecosystems. Various human activities, ranging from agricultural practices and industrial production to power generation and household use, heavily rely on access to water that is both abundant and of suitable quality.
In the European Union, a significant portion of the population, accounting for more than half, resides in agglomerations or areas with a population equivalent (PE) of over 150,000. This translates to a substantial daily volume of 41.5 million cubic meters of wastewater. Additionally, each year, approximately 2.4% (equivalent to 1 billion cubic meters) of treated domestic wastewater contains valuable reusable nutrients, organic carbon, lipids, and biosolids. It is worth noting that urban wastewater often exhibits high concentrations of dissolved and suspended organic matter, inorganic chemicals, and heavy metals, thereby presenting elevated chemical oxygen demand (COD) and biological oxygen demand (BOD) levels.
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Municipal Wastewater & Solid Waste

Within the realm of municipal and urban wastewaters, different forms of wastewater exist, each with its unique characteristics. One example is landfill leachate, which occurs when precipitation seeps through ores, raw materials, products, or solid waste, resulting in the dissolution of pollutants. Another form is urban runoff, which includes water used for outdoor cleaning and landscape irrigation in densely populated areas that have undergone urbanization. Urban wastewater, on the other hand, encompasses the wastewater generated from households, industries, and the outflow of rainwater. Given its potentially hazardous nature, urban wastewater requires disinfection to safeguard public health and protect the environment.

Effective management and treatment of wastewater are critical for ensuring the availability of clean water for various human activities. By addressing the challenges posed by urban wastewater, such as the removal of pollutants and the recovery of valuable resources, we can move closer to achieving sustainable water practices and maintaining a healthy environment for future generations.

Application of Advanced Electro Oxidation

              Evoaeo find a pathway to accomplish efficient & sustainable municipal and urban wastewater, landfill leachate treatment methods for degrading organic pollutants 

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Direct & Indirect Oxidation with Electrochemical Advanced Oxidation Process
Rising concerns over the impacts of urban and municipal wastewater on human and animal/plant health and are more rapidly growing population and tremendous urbanization brought challenges to wastewater treatment facilities as wastewater contents nowadays are way more complicated, and people find it difficult to eliminate organic and mineral compounds via conventional treatment methods. To address this, advanced oxidation processes (AOPs), such as chemical, photocatalytic, photochemical, and electrochemical approaches, offer environmentally sound solutions for treating industrial wastewater containing hazardous and refractory contaminants. Among these AOPs, electrochemical advanced oxidation processes (EAOPs) stand out as cost effective and efficient method that eliminates the need for toxic chemicals or the generation of hazardous waste. EAOPs have been extensively studied and employed for the treatment of industrial effluent and wastewater due to their exceptional oxidation capacity, rapid reaction rate, complete pollutant elimination, overall low cost, and ease of handling. While simple AOPs and electrochemical processes alone may fall short in mineralizing the organics and inorganics present in industrial effluent, combining AOPs with electrochemical technologies proves to be an efficient and cost-effective approach, leading to high removal efficiencies of organic and inorganic substances while reducing energy consumption. Amongst electrochemical advanced oxidation processes, anodic oxidation serves as a key process conducted within an electrolytic cell under the influence of hydroxyl intermediates generated during water oxidation, hydroxyl intermediates such as hydroxyl radicals persistent organic pollutants.
The boron-doped diamond electrode facilitates the electrogeneration of highly reactive hydroxyl radicals and active chlorine, resulting in efficient water discharge. Compared to alternative electrodes, it demonstrates superior current efficiency and significantly reduces energy consumption. The extensive testing and real-world use of the boron-doped diamond electrode have highlighted its remarkable ability to effectively degrade persistent and stubborn organic compounds. This electrode is valued for its cost-effectiveness, versatility, and swift treatment capabilities.

Hydroxyl Radicals,Direct & Indirect Oxidation with BDD Anode:Anodic Oxidation of BDD Anode

The degradation mechanism of persistent organic compounds using BDD electrodes involves direct oxidation and organics’ oxidation and oxygen evolution on the BDD anode surface through the generation of hydroxyl radicals. This process can be illustrated by the following reactions: BDD + H2O → BDD(OH.) + H+ + e- BDD(OH.) + R → BDD + mCO2 + nH2O BDD(OH) → BDD + 12O2 + H+ + e- Additionally, indirect anodic oxidation occurs through electrogenerated oxidants, such as hypochlorite, chlorine, ozone, or hydrogen peroxide, near the boron-doped diamond anode surface or in the bulk electrolyte. This can be described by the following chemical reactions: 2Cl- → Cl2(g) + Cl2(aq) +e- H2O → HOCl + Cl- + H+  HOCl → OCl- + H+ HSO4- + OH- → SO4·- + H2O  SO4·- + SO4- → S2O8 2- The utilization of conductive BDD anodes in wastewater pollutant degradation has garnered significant attention due to several technologically important characteristics. These characteristics include high overvoltage for O2 evolution, an inert surface with low adsorption properties, and exceptional corrosion stability.
schematic diagram of electro catalytic oxidation technology via boron doped diamond electrode
Electrolytic water mass transfer process

Municipal Wastewater Treatment Case Studies

Find out how BDD electrode and integrated wastewater treatment modules degrade obstinate toxic organic pollutants and compounds from residential wastewater and municipal solid waste.

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Landfill Leachate Wastewater

Evoaeo’s electro oxidation technology application in landfill leachate wastewater

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Municipal Wastewater Treatment

Advanced electro oxidation wastewater treatment technology hybrid

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PFAS Degradation

 Explore how electro oxidation is adopted to mineralize long chain PFAS

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Eavoaeo is a company specializes in offering solution to tackle the challenges from complex wastewater with our years of experiences with electro oxidation wastewater treatment technology, we offer customized solution to a vast variety of businesses and organizations, industries dealing with obstinate organic chemicals in their effluents.

Our services encompass:

Industrial wastewater treatment

Facilitating safe water reuse

Ensuring compliance with discharge regulations

Reducing the need for wasteful wastewater incineration

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