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The invention provides a dephosphorization and denitrification, mud decrement and phosphorus recovery integrated sewage treatment device and a method thereof. The method adopts processes of hydrolysis acidification, multilevel series contact aeration and dephosphorization and denitrification A<2>/O of continuous flow, and comprises the following steps that: a hydrolysis acidification unit is used to treat raw sewage and a little anaerobic phosphorus releasing sludge to realize conversion of VFA; clear solution rich in the VFA after hydrolyzed supplies rich carbon sources for a subsequent dephosphorization and denitrification A<2>/O unit to reinforce synchronous dephosphorization and denitrification; and low concentration phosphorus in the sewage is enriched in the anaerobic phosphorus releasing sewage by the excessive phosphorus absorption capability of a phosphate accumulating organism, and the minor part of phosphorus enriched sewage is drained to carry out chemical phosphorus solidification. The dephosphorization mode can significantly reduce sewage quantity of chemical dephosphorization, improve the utility ratio of a dephosphorizing medicament, reduce dosage of the medicament, has high phosphorous amount in the obtained chemical sludge, and realizes recycle of the middle and low concentration phosphorus in urban sewage by the mode of non residue sludge under a condition of low cost. Sludge decrement can be realized through biofacies separation of a multilevel series contact aeration tank and the function of microorganism predation grade by grade.

A structure that can be used as a gastric band (and that may also have other uses as an implant elsewhere in a patient) includes a plurality of magnetic elements in a serial array that can be implanted so that the array extends in a circumferential direction around the patient's stomach (or other body tissue structure in the patient). Circumferentially adjacent magnetic elements magnetically attract one another to apply radial pressure to the tissue structure encompassed by the array, but those elements can also move apart in response to sufficient outward pressure from the encompassed tissue structure and/or the contents of (e.g., food in) that tissue structure. When used as a gastric band, the device can provide resistance to excessive food intake, which can help promote weight loss.