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Waste not want not - States Assembly

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WASTE NOT, WANT NOT<br />

Figure 18: Summary Review of Available and Developing Technologies for Municipal Solid <strong>Waste</strong> (MSW) Management<br />

<strong>Waste</strong> Description & Economics Design to Biodegradable Municipal Environmental<br />

Management development commissioning <strong>Waste</strong> (BMW) diversion role and health issues<br />

Technology status timescales and environmental benefits<br />

Landfill<br />

containment and<br />

stabilisation – employs<br />

proven technology<br />

UK landfill tax low. Siteengineering<br />

&<br />

conditioning plan<br />

requirements raising costs<br />

substantial consented UK<br />

void space, problems in<br />

some areas<br />

no direct role – indirect from<br />

methane combustion. Future<br />

need will increasingly focus on<br />

MSW reprocessing residues<br />

concerns: health effects<br />

& vehicle movements.<br />

Sub-optimal resource<br />

recovery option<br />

BIOLOGICAL<br />

Composting<br />

aerobic degradation of<br />

organic material –<br />

commercially developed<br />

low-medium cost.<br />

Windrow technology<br />

exhibits clear economies.<br />

In-vessel technology is<br />

more modular<br />

plants designed today<br />

should be on-stream by<br />

2006-10<br />

potentially significant role –<br />

returns biomass and nutrients<br />

to soil, reduces soil erosion,<br />

acts as a carbon sink and<br />

displaces natural peat &<br />

manufactured soil conditioners<br />

concerns: Animal By-<br />

Products crosscontamination<br />

issues,<br />

odours and vehicle<br />

movements<br />

Anaerobic Digestion<br />

biological process in the<br />

absence of oxygen. Whilst,<br />

trialed, <strong>not</strong> yet<br />

commercially proven in<br />

the UK on MSW<br />

low-medium cost. Plant is<br />

somewhat modular<br />

requiring step-change for<br />

capacity increase<br />

with right incentives,<br />

could be on-stream by<br />

2006-10, subject to<br />

securing planning<br />

potentially significant role –<br />

returns nutrients to soil,<br />

displacing manufactured<br />

fertilizers, acts as a carbon sink<br />

and produces a renewable<br />

energy<br />

concerns: likely to mirror<br />

those for composting.<br />

Renewable bio-gas offers<br />

CO 2<br />

neutral combustion<br />

Ethanol production<br />

waste fermentation<br />

followed by distillation.<br />

Commercially proven in<br />

non-MSW applications<br />

medium-high cost. First<br />

commercial MSW plant<br />

under construction – may<br />

become a test-bed<br />

<strong>not</strong> as yet known where<br />

MSW is concerned –<br />

probably similar to process<br />

engineering facilities<br />

potentially significant role –<br />

ethanol is a renewable energy<br />

source which can be used in<br />

existing hydrocarbon<br />

infrastructure, resulting in CO 2<br />

neutral combustion<br />

public concerns likely to<br />

mirror those for any<br />

process engineering<br />

facility, or as per<br />

composting<br />

98

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