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DE1275003B
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Process for the removal of floating matter from waste water, which is cleaned in total treatment plants
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DE1246601B
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Process for the purification of waste water or of polluted ground and surface water with activated sludge
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DE1245867B
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Process for the neutralization of acidic water and waste water using grainy carbonate of lime
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DE1152117B
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Process for processing sewage sludge into hygienically harmless humus fertilizer
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DE1183025B
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Process for the chemical precipitation of sewage sludge as a pretreatment for their dewatering
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DE1245871B
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Process for thickening sewage sludge
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DE1174709B
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Process for the chemical precipitation of sewage sludge as a pretreatment for their dewatering
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DE953613C
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Process for processing sewage sludge into hygienically harmless humus fertilizer
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