In 2017 landfilling of waste ceased at Knapton Quarry, from this point we developed a non agricultural restoration scheme. No indigineous soils in the area that were suitable for supporting the site aftercare and planting plan.
We engaged with the environment agency and submitted a 200,000 tonne restoration scheme which incorporated the use of sub soils and a manufactured top soil. This soil substitute consisted of a blend of inert wastes and CLO to produce a synthetic topsoil.
Over the next 3 years we undertook progressive restoration of the site. Followed by the establishment of willow coppice and hardwood trees. As part of the restoration we have a 20 year husbandry scheme on site and from year 3 onwards we are expecting to take the first cut of the willow coppice as a sustainable biomass fuel.
KNAPTON QUARRY RESTORATION SCHEME
Use of soil substitutes in land restoration.
SIGNIFICANT COST SAVINGS FROM OUR POWERLINK BIO GAS ENGINE
In 2015 we installed our first Powerlink engine - a 250KW biogas engine. Powerlink is the largest manufacturer of diesel generators in China, they then expanded into manufacturing bio-gas, natural gas and CHP engines.
As an organic waste company we’ve been running an assortment of engines for many years. We have found significant cost savings from Powerlink, in terms of both the engine purchase price and running costs in comparison to other comparably sized engines from more established brands.
Reliability and efficiency are key to our operations and during the time the engine has been running, we have experienced an uptime of 95%.
We developed a partnership with Powerlink in 2019 and are now proud to be the UK suppliers of 3 types of Powerlink engines:
Biogas engines: which are traditionally used on landfill sites and anaerobic digestion plants. Natural gas engines: which are very economical for industrial users due to the low price of natural gas. Combined heat and power engines:which produce power cheaper than buying from the National Grid and the by-product provides heating and hot water. We have a demo engine here on site at Alne and would welcome anyone looking to invest to come along and see it in action to appreciate the quality and reliability of the build.