HydroThane is a group of companies specialized in industrial waste water treatment, water recycling, solid waste digestion and biogas treatment. HydroThane is a company with more than 30 years of practical experience in the design, engineering and construction of biological waste water treatment plants for industrial applications. HydroThane has an excellent reputation and proven track record with industrial clients in different types of industries, such as beverages, breweries, chemical / pharmaceutical, pulp & paper, food, (bio) ethanol/distilleries, etc. From its headquarters in the Netherlands, HydroThane operates globally with own local daughter companies and/or local partnerships. The name HydroThane is a combination of two words - Hydro (water) and MeThane (gas), which indicates their biological anaerobic sustainable treatment processes.

About Us


HydroThane develops and supplies sustainable treatment processes for industrial applications.

Innovation of the technologies is not only based on pure technical grounds, but economical running of the plant is also ahead of our preoccupations.

Purification of waste water with highly efficient anaerobic systems that produce energy from waste water is one of the key characteristics of the technologies of HydroThane. Treatment of the produced biogas from the anaerobic HydroThane processes has been also developed by HydroThane engineers based on years of practical experience.

Next to their anaerobic processes, HydroThane also offers a range of aerobic biological treatment technologies for different kinds of industrial waste waters, which can be combined to reach strict local discharge limits.


Anaerobic Technology
Anaerobic treatment of waste (water) is a biological method characterized by the production of methane (CH4). All the active micro-organisms belong to the group of anaerobic bacteria, i.e. bacteria which are able to and in most cases can only exist in an environment which excludes oxygen. In this context, methanogenic bacteria are a key component.

The anaerobic degradation process of organic material occurs stepwise.

There can be distinguished four steps:

  • Hydrolysis
  • Acidification
  • Acetogenesis
  • Methanogenesis.

The anaerobic process removes the bulk of COD from the waste (water) by converting it into biogas (= methane + carbon dioxide) at low operational costs.

Aerobic Technology
In order to achieve final effluent requirements, most often anaerobic treatment is not sufficient and it needs some post aeration step. HydroThane is able to give complete solutions for aerobic treatment applications as post treatment to an anaerobic treatment plant, or as the main treatment step, depending on the case and type/quantity of wastewater.

Aerobic Biological treatment is carried out based upon the principles of activated sludge process with biological nutrient removal (Nitrogen and Phosphorus) and in some cases separated sludge regeneration.

Oxygen supplied continuously activates the bacteria in order to start degrading the organic content, which will be subsequently converted to CO2 and excess biomass.

The presence of nitrogen in any form requires the application of aerobic biological nitrification-denitrification in order to remove it in the desired level, but also to avoid this process to take place in the final clarifiers and as a result to have floating biomass.

Biogas treatment & utilization
Energy generated from renewable sources such as biogas, solar or wind is called green power / green energy. Green energy / power is a term used to describe sources of energy that are considered to be environmentally friendly and non-polluting.

These sources of energy may provide a remedy to the systematic effects of global warming and certain forms of pollution.

Biogas utilization can occur in waste water treatment plants, solid waste digestion plants and solid waste landfills, where the biogas can be collected and used. When biogas is produced by means of an anaerobic process, the biogas consists of methane (CH4) and carbon-dioxide (CO2) along with some trace gasses such as water vapor, hydrogen sulphide (H2S), nitrogen (N2), hydrogen (H2) and oxygen (O2).

The concentration of hydrogen sulphide in biogas can vary from 250 ppmv up to several volume percentage, it has an offensive odour of 'rotten eggs' at concentrations as low as 50 ppbv and is toxic at concentrations above 100 ppmv.

At some applications H2S must be removed before the biogas can be given for utilization, for reasons of health, safety, environment and due to the fact that hydrogen sulphide gas is corrosive (can damage equipment like; gas engines (CHP), boilers, piping etc.)

Desulphurization of the biogas is also required when biogas is upgraded to natural gas quality for injection into the gas grid.


HydroThane - Model WSP - Water Desulphurization Process System

HydroThane WSP (Water deSulphurization Process) removes H2S from the biogas by utilizing the available activated sludge from the aerobic treatment stage. The activated sludge will wash the biogas in counter flow, absorbing the H2S from the gas phase (H2S-rich) into the water phase.

DeAmmon - Nitrogen Removal System

DeAmmon is nitrogen-reduction process developed for nitrogen removal from high concentrated streams such as industrial waste water and sludge dewatering supernatant from digested wastewater sludge. The great advantages of the DeAmmon process compared to the conventional nitrogen removal are the significantly lower oxygen consumption and conversion to gaseous nitrogen without organic carbon.


Wastewater Treatment for the Pulp & Paper Industry

The pulp and paper industry generates large volumes of highly heterogeneous waste waters containing compounds from wood or other raw materials, process chemicals and compounds formed during processing.

The waste water streams from pulp and paper vary greatly in concentration and composition. The waste water from mechanical pulping (TMP) and secondary fiber pulping as well as the condensates from chemical and semi-chemical pulping are typically non-toxic to methanogenic degradation...

Wastewater Treatment for Municipalities

A wide variety of sludge, including municipal sewage sludge, are treated in anaerobic digesters.

In these digesters, there is a certain amount of biogas created and this consists of CH4, CO2 and H2S. This biogas is often used for creating green energy. 


Operation Services

HydroThane can also perform the operation of the waste water treatment plants for the client or together with the client's personnel. HydroThane is already delivering to international clients operational services.

Start Up Assistance Services

HydroThane delivers start up services/assistance for new and/or existing biological waste water treatment plants. Our engineers will support you for a certain period to stabilize the biological process.



HydroThane delivers technical and technology-related training to the waste water treatment operators/manager during start up of the plant. New trainings for the operators can also be given by our engineers after a certain period of operation of the plant.



Company details

Business Type:

Industry Type:
Water and Wastewater - Water Treatment

Market Focus:
Globally (various continents)

Year Founded:


1,000,000 - 10,000,000 €

Office & Distributor locations:


More solutions from this company

This company also provides solutions for agricultural applications. Please, visit their profile in agriculture-xprt.com for more info.

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