JPH0141369B2 - - Google Patents

Info

Publication number

JPH0141369B2

JPH0141369B2 JP56142906A JP14290681A JPH0141369B2 JP H0141369 B2 JPH0141369 B2 JP H0141369B2 JP 56142906 A JP56142906 A JP 56142906A JP 14290681 A JP14290681 A JP 14290681A JP H0141369 B2 JPH0141369 B2 JP H0141369B2

Authority

JP

Japan

Prior art keywords

liquid

filter layer

filtration

filter

layer

Prior art date

1981-09-10

Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)

Expired

Links

• Espacenet
• Global Dossier
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• 238000001914 filtration Methods 0.000 claims description 53
• 239000007788 liquid Substances 0.000 claims description 52
• 239000007787 solid Substances 0.000 claims description 45
• XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 44
• 238000004140 cleaning Methods 0.000 claims description 30
• 238000005406 washing Methods 0.000 claims description 12
• 238000007664 blowing Methods 0.000 claims description 4
• 238000007599 discharging Methods 0.000 claims description 3
• 239000000706 filtrate Substances 0.000 claims description 3
• 238000000034 method Methods 0.000 claims description 3
• 238000000926 separation method Methods 0.000 claims description 3
• 238000003756 stirring Methods 0.000 claims description 3
• 239000004576 sand Substances 0.000 description 34
• 239000002351 wastewater Substances 0.000 description 18
• 239000004744 fabric Substances 0.000 description 8
• 238000005273 aeration Methods 0.000 description 4
• 238000009287 sand filtration Methods 0.000 description 4
• 239000010802 sludge Substances 0.000 description 4
• 238000002156 mixing Methods 0.000 description 3
• 239000010865 sewage Substances 0.000 description 3
• 230000007423 decrease Effects 0.000 description 2
• 230000029087 digestion Effects 0.000 description 2
• 239000000463 material Substances 0.000 description 2
• 238000004062 sedimentation Methods 0.000 description 2
• 238000004887 air purification Methods 0.000 description 1
• 238000013459 approach Methods 0.000 description 1
• 238000011001 backwashing Methods 0.000 description 1
• 239000012141 concentrate Substances 0.000 description 1
• 238000001514 detection method Methods 0.000 description 1
• 230000006866 deterioration Effects 0.000 description 1
• 230000000694 effects Effects 0.000 description 1
• 244000005700 microbiome Species 0.000 description 1
• 239000000203 mixture Substances 0.000 description 1
• 239000002245 particle Substances 0.000 description 1
• 230000008929 regeneration Effects 0.000 description 1
• 238000011069 regeneration method Methods 0.000 description 1
• 230000000630 rising effect Effects 0.000 description 1
• 238000004065 wastewater treatment Methods 0.000 description 1