Alkaline straw pulp paper black liquid and middle section treatment of sewage technology thereof

The invented technology includes recovery of lignin by acidic separation, anaerobic digestion, coagulation treatment and aerobic biological treatment. This technology possesses following features: (1)lignin product and by-product marsh gas may be produced; (2)after the pollution load of black liquor...

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Bibliographische Detailangaben
Hauptverfasser:	KONG XIANZHEN, FENG JIANMIN, XING YUFANG ET AL
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Beschreibung
Zusammenfassung:	The invented technology includes recovery of lignin by acidic separation, anaerobic digestion, coagulation treatment and aerobic biological treatment. This technology possesses following features: (1)lignin product and by-product marsh gas may be produced; (2)after the pollution load of black liquor is greatly reduced, it is mixed with middle-stage sewage for integrated treatment; and (3) chemical and biological treatments are conducted alternately. Said technological process is simpler and low in capital cost and operation cost. The quality of treated water can meet the level-one specifications of national sewage drainage standard GB 8978-88.