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Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 CONT

Three of the conventional paved rectangular drying beds with a centre drainage trough and concrete side walls were modified to meet the design criteria mentioned previously and then planted with Phragmites communis.  1, record 1, English, - drainage%20trough

Record number: 1, Textual support number: 1 OBS

Figure 1 - Cross section of a typical reed bed.  1, record 1, English, - drainage%20trough

Record number: 1, Textual support number: 2 OBS

Sludge treatment in field scale reed beds ... Reed beds may be roughly categorized as rectangular beds with side walls, layers of sand and then gravel with an under drainage system to collect and carry away the filtrate. They are lined with impervious membranes and planted with the reed, Phragmites communis.  1, record 1, English, - drainage%20trough

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 CONT

Lits de séchage. Le séchage des boues sur des lits de sable drainés, longtemps la technique la plus utilisée, est en régression [...] Les aires de séchage sont généralement ainsi constituées [...] : première couche support de gros cailloux avec une couche de graviers [...] Des drains sont aménagés au fond de cette couche support [...] Le système de drainage doit évidemment se situer au-dessus de la nappe phréatique.  1, record 1, French, - drain

Record 1,  Textual support,  Spanish