000			01274nam a2200241Ia 4500
001			IA_Because the COD test is important it can´t be omitted, it uses digester and catalyst solutions, which contain chromium (Cr), silver (Ag) and mercury (Hg), therefore, the residue obtained will contain these heavy metals in high levels, the concentration of these metals exceeds by far the maximum permissible limits established by mexican regulation, this liquid waste is considered hazardous according to NOM-052-SEMARNAT-2005.
002			REDUCCION-PRECIPITACION DE METALES EN RESIDUOS DE
008			220117s xx 000 0 und d
010			_a186155
530			_aDisponible en PDF
583			_a1 ej. imp. ; 2 ej. CD
650			_aAguas residuales _92583
650			_aChemical oxygen demand _9161372
650			_aDemanda química de oxígeno _9161373
650			_aSewage _9148728
650		0	_aTratamiento de agua residual _zMéxico _zChapingo _9161374
650		0	_aWastewater treatment _zMexico _zChapingo _9161375
700			_aEsparza Torres, Félix, asesor _9163648
700			_aEspinosa Solares, Teodoro, asesor _9163683
700			_aGonzález Rangel, María del Carmen, dir. _9161376
942			_cTESIS R34 2016
999			_c186155 _d186155