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UASB Reactors vs. CSTR Digesters: Which Is Better for Industrial Wastewater Treatment?

Article-At-A-Glance UASB reactors and CSTR digesters are both proven anaerobic treatment technologies, but they serve very different wastewater profiles — choosing the wrong one costs you efficiency, uptime, and money. UASB reactors excel with low-suspended-solids, high-COD wastewater, while CSTRs handle complex, high-solids streams that would clog or crash a UASB. At pH 5, a UASB reactor…

Landfill Gas to RNG Project Timeline: From Feasibility to First Gas Delivery

The completion of a landfill gas to renewable natural gas (RNG) project typically takes three to five years. The three main stages are engineering and procurement, construction and commissioning, and feasibility and permitting. Article-At-A-Glance: Landfill Gas to RNG Projects Landfill gas can be converted into pipeline-ready renewable natural gas (RNG) in as little as 12 to 24 months, depending…

Starch Wastewater Treatment Processes Guide: Anaerobic Digestion & Alternatives

During starch wastewater treatment processes, high quantities of organic contaminants and suspended solids are removed from starch effluent using physical, chemical, and biological techniques such as screening, coagulation-flocculation, and anaerobic digestion. Ten to twenty cubic metres of wastewater with a high Chemical Oxygen Demand (COD) are created for every tonne of starch…

Dry Fermentation vs. Wet Anaerobic Digestion: Which Works Best for Municipal Solid Waste?

Dry fermentation (solid-state AD) and wet anaerobic digestion are both biochemical processes used to convert organic waste into biogas. The primary difference is the moisture content: wet systems process pumpable slurries (<15% dry matter), while dry systems handle stackable solids (20% – 40%+ dry matter). Article-At-A-Glance – Dry Fermentation vs. Wet Anaerobic Digestion The total solids (TS)…

Covered Lagoon vs Plug Flow Digesters: Livestock Comparison Guide Released

IPPTS Anaerobic Digestion releases a comparison guide evaluating covered lagoon and plug flow digesters for livestock biogas production, helping farmers match system capabilities to operational requirements and sustainability goals. Steve Last, publisher of this website, has released a comparison guide to help livestock farm owners evaluate two dominant technologies for on-farm biogas production:…

Biomethane as a Natural Gas Replacement: How Close Are We?

Primary keyword: biomethane natural gas replacement Target site: blog.anaerobic-digestion.com Suggested URL slug: /biomethane-natural-gas-replacement/ Meta description: For decades, natural gas has been the backbone of heating, industrial energy, and electricity generation across the UK and Europe. But a quiet revolution has been gathering pace in farm buildings, food factories, and wastewater…

Digestate Disposal Costs and PFAS Contamination: What UK AD Operators Need to Know

Digestate disposal costs can determine whether an anaerobic digestion plant operates profitably or becomes burdened by an expensive liquid by-product. For many plants, particularly food-waste AD facilities, the problem is not producing digestate. The challenge is finding sufficient suitable land, storing the material until it can be used, transporting a predominantly liquid product and…

Biogas To Hydrogen: A Cheaper Option For Hydrogen Production?

The problem is real. Traditional hydrogen production methods cost far too much. They drain budgets and slow down progress towards net-zero goals. Here is where things get interesting for anyone in the anaerobic digestion and biogas industry. The International Energy Agency estimates that global biogas resources could fulfil up to 20 per cent of gas demand and help lower emissions significantly.…

Digestate Transport & Storage Solutions Guide

Digestate transport involves moving nutrient-rich bio-fertiliser from anaerobic digestion (AD) plants to agricultural land or storage lagoons. Usually, articulated trucks, farm trailers or specialised vacuum tankers are used to handle it. To maximise the benefits of nutrients and adhere to environmental rules, proper logistics are essential. Digestate Transport – Key Takeaways Digestate is a…

Biomethane Price vs Natural Gas UK – 2026 Update

In February 2022, we published an article based on European Biogas Association data showing that biomethane had become cheaper than natural gas by as much as 30% — a striking claim at a time when the Russian invasion of Ukraine had sent UK wholesale gas prices spiralling to historic highs. Four years on, the energy landscape looks very different. This article reassesses where biomethane stands…

LPG Alternatives for Cooking - Including Biogas and Biomethane

LPG Alternatives: Top alternatives to LPG gas for cooking include electric induction cooktops, infrared cooktops, biogas, piped natural gas (PNG), and electric appliances like pressure cookers. For rural or off-grid areas, bioLPG, solar cookers, and rocket stoves are sustainable options. These alternatives offer benefits ranging from lower carbon emissions to increased energy efficiency and…

Can Digestate Fertilizer Save Farm Soil Nutrient Costs? Benefits, Uses & Advantages

Digestate fertilizer, a nutrient-rich bio-fertilizer produced via anaerobic digestion, can significantly lowers soil nutrient costs for farms. By replacing expensive synthetic fertilizers with whole or separated digestate, growers can easily save between $135 to $150 (£110 to £120 per hectare, according to Farmers Weekly, while improving overall soil health and long-term crop yields. Key…

Bennamann Biomethane Upgrading: A New Future for UK Farm Biogas Without Gas-to-Grid?

Could medium-sized farms and existing anaerobic digestion plants soon turn raw biogas into useful, fuel-grade biomethane without needing a full gas-to-grid project? That is the inspiring prospect raised by Bennamann’s biomethane upgrading and Bio-CNG refuelling technology. For many years, the UK farm biogas sector has been shaped by subsidy regimes, electricity generation, CHP engines, heat use,…

Covered Lagoon Digester: The Low-Cost Alternative to Biogas Tanks

Why do farms build expensive Biogas Digester Tanks when they could just add a plastic membrane cover to an existing manure storage SSAFO slurry lagoon and have a covered lagoon digester? A covered lagoon digester is a large, in-ground anaerobic treatment pond topped with an impermeable, flexible cover to capture biogas. It breaks down agricultural or industrial organic waste to capture…

Biomethane Price Trends, Analysis & Forecast

Biomethane production costs typically range from €50–€110/MWh, largely dependent on feedstock and technology, often competing with volatile natural gas prices, with 45 bcme of global potential cost-competitive with fossil natural gas. In the transport sector, advanced biomethane from waste is being produced for approximately USD 0.45–0.55/LGE. The Story in Brief: Biomethane production costs…

Alternatives to Natural Gas - Listed with Pros and Cons for Each

Key alternatives to natural gas for heating and power include electrification (solar, heat pumps, wind), biogas and biomethane (produced from organic waste), green hydrogen, and geothermal energy, which offer lower carbon emissions. These solutions reduce dependency on fossil fuels, enhance sustainability, and assist in meeting net-zero targets Summary: Pros and Cons of Natural Gas…

Biogas Plant Construction Guide & Tips for Efficient Installation

Biogas plant construction involves building an anaerobic digestion system to convert organic waste into methane gas and fertiliser. All types consist of an inlet, a digester tank or tanks, gas storage (usually above the reactor), and an outlet. Key steps include site selection, pit excavation, tank containment (110% by volume of tank rupture volume), fabrication or civil engineering construction…

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