§ Mr. Chris Smithasked the Secretary of State for the Environment if he will list all research projects commissioned or completed during the last three years into the development of environmentally sound technologies, products and substitutes to prevent or reduce hazardous wastes and pollutants in waste water.
§ Mr. WaldegraveWithin the last three years the following research contracts have been commissioned by the land wastes division of my Department either to reduce the environmental hazards of difficult wastes or to reduce pollutants in waste water.
- —Stablisation of organic wastes in clay/cement mixes using quarternary ammonium compounds.
- —Microbiological systems for the treatment or removal of heavy metals and persistent organic materials.
- —Treatment of landfill leachate bilogically with anaerobic pre-treatment.
- —Treatment of leachate by spray irrigation onto woodland.
- —Treatment of ammonia-rich landfill leachate.
- —Treatment of low-strength leachate aerobically from landfills in areas of high rainfall.
- —Determination of performance characteristics of various types of solidification processes for toxic wastes.
Of these, the last two have been completed.
§ Mr. Chris Smithasked the Secretary of State for the Environment if he will give the national grid references for all the chemical waste dump sites used on a regular or irregular basis around the United Kingdom.
§ Mr. WaldegraveI shall write to the hon. Member for clarification of the information he has requested.