Application Note - Activity Test

For an efficient AD process it is important to monitor the viability and density of the anaerobic microbes involved in the process. This information may be obtained by performing activity tests (i.e. specific methanogenic, acidogenic and hydrolytic activity). Read more Download

Application Note - Additives

Many biomass sources used to produce biogas are suffering from insufficient amounts of various essential nutrients. These deficiencies mean that the microorganisms in an anaerobic digester are working at suboptimal conditions, which may lead to unstable processes with uncertain longterm performance. Read more Download

Application Note - ANAMMOX

The use of partial nitritation and Anammox process for nitrogen removal in different waste streams is an interesting alternative to the more energy and resource intensive nitrification and denitrification processes traditionally used at WWTPs. Read more Download

Application Note - Bioethanol

Bioethanol produced by fermentation is considered a good alternative for replacing fossil fuels. However, due to competition with food production the bioethanol produced today, which mainly come from sugar crops, only has a limited capacity. Read more Download

Application Note - Biohydrogen

Biohydrogen is considered as one of the most promising alternatives to fossil fuels. It can be produced in several ways (e.g. direct and indirect biophotolysis, photo-fermentation and dark-fermentation) involving different types of microorganisms and carbon sources. Read more Download

Application Note - Biorefinery

The concept of biorefineries, where biomass is used to produce various products (e.g. transportation fuels, electricity, different chemicals), is considered an integral part of the process of reducing the dependency of fossil fuels. Read more Download

Application Note - Co-digestion

Mixing two or more different types of substrates together may improve nutrient balance and lead to a more stable AD process. This is favourable for maximising the gas production and resource utilisation and represents an integral part in the optimisation of a biogas plant. Read more Download

Application Note - Life Cycle Assessments

Performing a life cycle assessment is very important for the determination of the environmental impact of both existing and future projects that affects the society. However, in order to have reliable results it is imperative to have accurate data to base the calculations on. Read more Download

Application Note - Pre-treatment

Large portions of the biomass that can be used to produce biogas today are limited by slow and poor biodegradability. This prevents their usage as well as limits the efficiency and profitability of many biogas plants. Various pre-treatment techniques (i.e. biological, chemical, thermal and mechanical means) can be applied to remove this bottleneck by increasing the degradation rate or improving the degradability of biomass. Read more Download

Application Note - Test standardisation

Fermentation test in batch procedures for various biological processes (e.g. anaerobic digestion, anammox, dark fermentation, ethanol fermentation, etc.) are increasingly recognised as key experimental approaches for research studies and industrial applications. Read more Download

Application Note - Toxicity/Substrate Inbibition

Many of the waste types that can be treated with anaerobic digestion contain toxic compounds that may inhibit or introduce irreversible damaging effects to the process. In order to better understand the toxicity of these substances and determine the tolerance level of the microorganisms, toxicity/inhibition tests are essential to perform. Read more Download

Bioprocess Academy - Industrials Lesson 1 of 4: Biogas Industry: Key Challenges To Advance the Sector

With the vision to fully harness this potential, a real industry has grown around industrial biogas plants that use anaerobic digestion to generate renewable electricity, vehicle fuel and natural gas from abundant biowaste and biomass. Over the last few decades, this industry has grown rapidly, counting now more than 14,500 digesters in operation in Europe and an ever increasing number of digesters in the rest of world. We can say we've come far, but when it comes to maximising efficiency and profitability, we still have a long way to go. Read more


A successful collaboration between the Organic Stream, Lund university and Bioprocess Control has resulted in a great episode with a detailed update on the current status and challenges facing the Anaerobic Digestion sector today. With industry experts Jing Liu and Mario Rosato, they discuss the need for a better understanding of the AD process to improve operational efficiency, policy changes that support renewable energy and environmental safety, and for closed-loop systems that favour local abundant feedstocks over the use of energy crops. Read more Download

Redimensioning the importance of the VFA/TA (FOS/TAC) method

To manage a biogas plant means to become a “bacteria farmer”. In the same way that livestock requires regular veterinary inspection and monitoring of the quality of the fodder, also an anaerobic digester requires a “healthy and balanced” diet. The practice of monosubstrate digestion based only on silage, a result of a regulatory body and incentives copied from Germany without taking into account the characteristics of the Italian market (and the problems caused by monosubstrate digestion in Germany itself!), involves the frequent collapse of biological processes. It is only with the installation of his own laboratory and training of his staff that the manager of the biogas plant will ensure the full efficiency of the anaerobic digestion process, in order to prevent biological collapses in advance and therefore ensure the profitability of the investment. Read more Download