MLVSS

AcronymDefinition
MLVSSMixed Liquor Volatile Suspended Solids (environmental waste term)
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where UI is the dehydrogenase activity ([micro]mol INT/g-min), A denotes the absorbance of the extract liquor, and W represents biomass content (MLVSS, mg).
Temperature and pH values for settled influent and effluent were measured on daily basis while, MLVSS in the reactor, COD, BOD, total Cr, S[O.sub.4.sup.2-], [S.sup.2-], SS, TDS and TS of influent and effluent were measured twice a week.
Extended aeration is generally operated under low (F/M) between 0.04-0.1 kg [BOD.sub.5]/kg MLVSS.d [6].
The factors influencing the membrane fouling at various operating stages such MLVSS concentration, Hydraulic Retention Time (HRT) and Solid Retention Time (SRT) not well explained at short and long-term MBR operation.
The pH and MLVSS were estimated by the standard methods (APHA 1995).
The low biomass production is similar to the value of 0.06 mg MLVSS mg [COD.sup.-1] sludge yields obtained by Khongnakorn and Wisniewski (2007), who also operates the MBR under complete sludge retention.
tiempo Tiempo (h.) 0.0 6.5 22.0 28.5 49.0 DQO (mg/l) 4730.9 4300.8 2580.5 2422.5 1009.9 ST (mg/l) 1970 -- 2705 3380 3005 MLVSS (mg/l) 1445 -- 2535 2835 2785 Tiempo (h.) 120.5 178.0 230.0 298.0 DQO (mg/l) 427.4 527.2 235.3 -- ST (mg/l) 2900 -- 2320 2650 MLVSS (mg/l) 2690 -- 2230 1940 Tabla 2: Valores estimados de los parametros biocineticos PROCESO DEGRADACION DE SUSTRATO Cinetica 1 Cinetica tipo Monod orden [u.sub.max] [K.sub.s] k (l/mg.h) (l/mg.h) (mg/l) 0.0164 -- -- -- 249.4 11867.3 PROCESO CRECIMIENTO DE BIOMASA FACTOR DE CORRELACION [k.sub.d] ([ji al cuadrado]) (1/h) Y 10.446 0.866 47.2 10.260 0.866 47.9
10.0 10.88 11.73 11.34 13.8 sup.-]-N (mg/L) MLSS 800 960 1600 1700 1060 (mg/L) MLVSS 540 640 1240 1320 740 (mg/L) Time Anaerobic Phase Settle Parameter 5.5h 6.5h 7.5h 8.5h 9.5h SCOD 270 267 254 214 160 (mg/L) N[H.sub.3] 6.43 5.74 5.68 6.09 6.87 (ppm) N[O.sub.2.
The oxygen uptake measurements were conducted at two concentrations of 1 and 10 mg/l of heavy metal concentration and at 3 levels of MLVSS (mixed liquor volatile suspended solids) of 600,900 and 1500 mg/L.