Crowcon - Detecting Gas Saving Lives
Search

Waste to Energy

Introduction

Waste comprises materials that are no longer needed, and thus are discarded. Waste can be classified as solid or liquid according to its form, and further categorised as hazardous and non-hazardous waste. Liquid waste includes municipal wastewater, storm water run-off and industrial wastewater discharge.

Solid waste includes household rubbish, which is also called municipal solid waste (MSW), industrial waste – for example, from agriculture – medical and electronics waste.

The treatment of solid waste is challenging because it may contain one of more contaminants (which may include heavy metals, explosive and flammable materials) and these must be dealt with before the waste can be treated.

 

Applications

Biogas Plants
Refuse Collection
Waste Storage

Gas Hazards in Waste to Energy Sector

Process Area

Typical processes and associated gas detection issues

Biogas Plants

Biogas is produced when organic materials such as agricultural and food waste are broken down by bacteria in an oxygen-deficient environment. This is a process called anaerobic digestion. When the biogas has been captured, it can be used to produce heat and electricity for engines, microturbines and fuel cells. Clearly, biogas has high methane content as well as substantial H2S, and this generates multiple serious gas hazards.

In particular, there is elevated risk of:

  • Fire and explosion
  • Confined space hazards
  • Asphyxiation
  • Gas poisoning (H2S, NH3)
  • Oxygen depletion

Operators in a biogas plants must have personal gas detectors that detect and monitor flammable gas, oxygen and toxic gases like H2S and CO.

Refuse Collection

It is common to find flammable gas CH4 and toxic gases H2S, CO and NH3 in refuse bunkers. Refuse bunkers are built several metres underground and gas detectors are usually mounted high above them, which makes those detectors hard to service and calibrate.

In many cases, a sampling system is a practical solution as air samples can be brought to a convenient location and measured.

Leachate Pool

Leachate is a liquid that drains (leaches) from an area in which waste is collected, and it presents a range of gas hazards. These include the risk of flammable gas (explosion risk), H2S (poison, corrosion), ammonia (poison, corrosion), CO (poison) and adverse oxygen levels (suffocation).

Leachate pool and passageways leading to the leachate pool must be monitored for CH4, H2S, CO, NH3, O2 and CO2. Various gas detectors should be placed along routes to the leachate pool, with output connected to external control panels.

Combustion and heat recovery

Detection of O2 and toxic gases SO2 and CO is vital in boiler house areas.

Exhaust air scrubber

The flue gas from incineration is highly toxic, as it contains pollutants such as NO2, SO2, HCl and dioxin. NO2 and SO2 are major greenhouse gases, while HCL and dioxides are harmful to human health

Ash Pit

It is usual to monitor oxygen and toxic CO in ash pits.

Products for Waste to Energy Industry

Portables
T4

Portable 4-in-1 gas detector with new sensor technologies

Find out more
Gas-Pro

A multi gas detector offering 5 gas support as well as a dedicated pre-entry check mode and optional pump feature

Find out more
Gasman

A compact and fully ruggedised single gas detector for the toughest of industrial environments

Find out more
Fixed Monitors
Xgard

Fixed multi gas detector

Find out more
Xgard Bright

Addressable fixed head detector with OLED display. Now available with MPS technology

Find out more
Vortex

Our most flexible gas controller package

Find out more
Addressable Controllers

Local non-intrusive operation & display with simultaneous live reading display and alarm functions via colour LCD display

Find out more

Industry Insights

CASE STUDY
NWG Bioenergy

NWG Bioenergy turned to Crowcon for help in monitoring methane, oxygen depletion and hydrogen sulphide risks at their Ridge Road site.

Find out more
BLOG
The Many Colours of Hydrogen

Hydrogen, alongside other renewables and natural gas has an increasingly vital role to play in the clean energy landscape. Corporations and countries are increasingly interested in alternative fuels amid the global push for carbon neutrality. This year the EU pledged to become climate neutral (that is, to become an economy with net-zero greenhouse gas emissions) by 2050.

Read more
Blog
Coming Soon

Coming Soon

+44 (0)1235 557700