PSA in biogas upgrading: how pressure swing adsorption works
PSA separates CO₂ from methane using cyclic adsorption on a molecular sieve. We discuss the phases of the cycle, methane losses, pretreatment requirements and typical problems.
Knowledge compendium — page 44
1,083 articles on biogas, biomethane, bioLNG, biohydrogen, waste-to-energy, waste and regulation — since December 2019. Filter by category, type, year and tag.
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TEG final report on the EU taxonomy: criteria for biogas and biowaste digestion
On 9 March 2020 the TEG expert group published its final report on the EU taxonomy of sustainable investment. It covers criteria for biogas production and the digestion of biowaste and sewage sludge.
The new EU action plan for a circular economy: half as much residual waste
Communication COM(2020) 98 announces 35 initiatives, including waste reduction, halving the amount of residual municipal waste by 2030, and nutrient management.
Bio2Watt in Bronkhorstspruit: a feedlot manure biogas plant that powers a BMW factory
The first commercial cattle manure biogas plant in South Africa, about 4.4–4.6 MW, started up in October 2015 and sells electricity to the BMW factory in Rosslyn. What does it mean for the market?
Argentina: RenovAr and biogas — 36 biogas projects, 4 landfill gas and 18 biomass
A summary of the results of the RenovAr programme according to the Argentine government (as of August 2018): 147 projects and 4,466.5 MW in rounds 1, 1.5 and 2, including 36 biogas, 4 landfill gas and 18 biomass projects.
pH in the digester: which range is correct and what changes mean
In agricultural biogas plants pH is usually in the range 7.0–8.2. We explain the role of the buffer, the measurement, and why pH is a lagging indicator.
Lithuania: how energy from biogas is supported — a tariff for small installations, premium auctions for the rest
In Lithuania installations up to 10 kW receive a fixed tariff, while larger ones, including biogas plants, must win a market premium auction. Biogas injected into the grid has a separate regulator tariff system.
The Commission proposes a European climate law: climate neutrality in 2050 as an obligation
Proposal COM(2020) 80 is to turn the declaration of December 2019 into a binding provision. The Commission also announced that by September 2020 it would present a proposal for a new 2030 target.
Victoria: the “Recycling Victoria” strategy and four waste bins by 2030
In 2020 the state of Victoria announced the ten-year “Recycling Victoria” plan: a target of 80% waste recovery, halving organics to landfill and four bins in households.
Cauliflower — BMP: 2 studies, weighted mean 274 m³ CH₄/t VS
274 m³ CH₄/t VS weighted mean from 2 studies
≈59 %
Fruit and vegetable waste (mixed) — BMP: 5 studies, weighted mean 305 m³ CH₄/t VS
305 m³ CH₄/t VS weighted mean from 5 studies
neutral — editorial rating for biogas plants≈55 %
Chlorella vulgaris — BMP: 9 studies, weighted mean 278 m³ CH₄/t VS
278 m³ CH₄/t VS weighted mean from 9 studies
≈58 %
Chlorella sp. — BMP: 4 studies, weighted mean 229 m³ CH₄/t VS
229 m³ CH₄/t VS weighted mean from 4 studies
≈58 %
Softwood — BMP: 7 studies, weighted mean 58 m³ CH₄/t VS
58 m³ CH₄/t VS weighted mean from 7 studies
neutral — editorial rating for biogas plants≈52 %
The new nitrates programme of 2020: fertilisation rules cover the whole of Poland
The Council of Ministers Regulation of 12 February 2020 (Journal of Laws (Dz.U.) item 243) adopted a programme for reducing water pollution by nitrates. The rules covered the whole country, not only particularly vulnerable areas.
Reppie in Addis Ababa: 50 MW from municipal waste at the former Koshe landfill
Reppie, next to the Koshe landfill, is a 50-megawatt thermal waste treatment plant opened in August 2018. We explain its parameters, the context and the place of digestion in African cities.
Finland: target price premium of €83.50/MWh for biogas and its closure in 2019
The Finnish scheme for biogas paid the difference between a target price of €83.50/MWh and the market price, plus €50/MWh for heat from cogeneration. It was closed to new biogas plants on 1 January 2019.
Membrane upgrading: how CH₄ and CO₂ separation works in a biomethane plant
Polymer membranes separate CO₂ from methane on the principle of different permeability. We explain the multi-stage system, pressures, methane losses and pretreatment requirements.
By-product or waste? The five conditions of Article 10 of the Act on waste and the recognition procedure
A by-product is not "waste with good PR". We explain the five cumulative conditions of Article 10, the notification to the marshal and the decision under Article 11, and the consequences for suppliers of substrates to biogas plants.
Mesophilic or thermophilic digestion? Comparison, advantages and risks
Mesophilic (approx. 35–42 °C) or thermophilic (approx. 50–58 °C)? We compare the rate of degradation, hygienisation, heat balance, stability and ammonia risk to help choose the regime.
Finland: only wind won the first premium auction, although biogas could take part
In the Finnish premium auction of late 2018, biogas and biomass, among others, could bid, but the cheapest bids came from onshore wind. The average premium was about €2.5/MWh.
Animal fats — BMP: 3 studies, weighted mean 690 m³ CH₄/t VS
690 m³ CH₄/t VS weighted mean from 3 studies
neutral — editorial rating for biogas plants≈63 %
Celery (leaves and stalks) — BMP: 2 studies, weighted mean 236 m³ CH₄/t VS
236 m³ CH₄/t VS weighted mean from 2 studies
≈55 %
Albizia wood chips and leaves — BMP: 2 studies, weighted mean 137 m³ CH₄/t VS
137 m³ CH₄/t VS weighted mean from 2 studies
neutral — editorial rating for biogas plants≈54 %