Definition of sludge treatment

The process of sludge treatment of sewage sludge concentration, urinary control, dehydration, stable, drying and incineration.

Raw sludge ( raw sludge ):

Without the sludge treatment of primary settling sludge. Mixed sludge two sedimentation sludge or both.

Primary sludge ( primary sludge ): from the early settler discharged sediment.

Two sludge ( secondey sludge ): from two sedimentation tank ( or settling zone ) discharged sediment.

Activated sludge ( activated sludge ): flocculation body contains a variety of aerobic microbial population reproduction in aeration tank.

Digested sludge ( activated sludge ): after aerobic or anaerobic digestion of the sludge, containing organic matter concentration decreased to a certain extent, and tends to be stable.

Return sludge ( returned sludge ): from two precipitation ( or settling zone ) separated, return to the active sludge of aeration tank. Residual sludge ( excess activated sludge ): two sedimentation tank from the activated sludge system ( or settling zone ) activated sludge discharged outside the system.

Sludge gas ( sludge gas ): in the sludge anaerobic digestion, a gas produced by decomposition, mainly composed of methane and carbon dioxide, and a small amount of hydrogen, nitrogen and hydrogen sulfide. Commonly known as biogas.

Various processing type

Sludge digestion ( sldge digestion ): in oxygen or oxygen-free conditions, by the action of microorganisms, organic matters in sludge into stable substances.

Aerobic digestion of sludge ( aerobic sigestion ): after a long time of aeration, part of which organic matter degradation process and stable by aerobic microorganisms.

Anaerobic digestion ( anaerobic digestion ): in the absence of oxygen, organic matters in the sludge process of degradation and stabilization by anaerobic microorganisms.

Mesophilic digestion ( mesophilic digestion ): the sludge at the temperature of anaerobic digestion process for 33-530C.

Thermophilic digestion ( thermophilic digestion ): the sludge at the temperature of anaerobic digestion process 53-330C.

Sludge concentration ( sludge thickening ): to reduce the sludge moisture content by gravity or air flotation process, make the process of sludge thickening.

Sludge elutriation ( elutriation of sludge ): a sludge pretreatment method to improve the dewatering performance of sludge. Use clear water or wastewater sludge digestion sludge elutriation, lower alkalinity, save the sludge treatment dosage, improve sludge dewatering efficiency.

Sludge dewatering ( sludge dewatering ): further removal of part of the process of moisture content of sludge concentration, generally refers to mechanical dewatering.

Sludge vacuum filtration ( sludge vacuum filtration ) : the use of vacuum filtering medium side of decompression, resulting in medium pressure difference on both sides, the sludge water forced sludge dewatering method of filtration medium.

Sludge filter press ( sludge pressure filtration ) : the use of positive pressure filtration, sludge dewatering method for sludge water forced filtration medium.

Sludge drying ( sludge drying ): by infiltration or evaporation effects, most of the removal process water from sludge, generally refers to using sludge drying bed ( bed ), since the evaporation facility or steam, gas, oil, heat drying facilities.

Sludge incineration ( sludge incineration ): a process of sludge disposal. It uses the incinerator will be dewatered sludge heat drying, organic matter with high temperature oxidation of sludge, the sludge has become a small amount of ashes.