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DETERMINATION OF SLUDGE COMPOST QUALITY BY BIOASSAY

The paper reports the progress on a plant germination and growth trial as part of Thames Water's quality‐control procedure for sludge composting and recycling. The experiment was conducted by cultivating two types of plants in a greenhouse under controlled environmental conditions, using (a) standard peat‐based multipurpose compost, (b) Terra Eco Systems multipurpose compost, and (c) woodchip‐amended sludge compost.