Determination of the ozonization kinetics of a textile effluent in the removal of color removal and organic matter

Trevizani, Jéssica Luiza Bueno; Carvalho, Karina Querne de; Passig, Fernando Hermes; Schiavon, Gilson Junior; Pereira, Izadora Consalter; Silva-Medeiros, Flávia Vieira da

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Artigos • Matéria (Rio J.) 24 (1) • 2019 • https://doi.org/10.1590/S1517-707620190001.0613 copy

Determination of the ozonization kinetics of a textile effluent in the removal of color removal and organic matter

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

The oxidation of the tributary and textile effluent was done in batch for 5 and 2 h, respectively. The ozone generation used was approximately 1085.25 mgO₃ h^-1 with air flowrate of 8 L min^-1. The following physicalchemical parameters were determined: temperature, pH, turbidity, conductivity, true color, bicarbonate alkalinity, volatile acids, chemical oxygen demand (COD), total solids, suspended solids and dissolved solids. The color removal efficiency for both effluent (raw) and the effluent (treated in the industry) was significant with an average of 85% and 90%, respectively. The kinetic constant of the second order was better adjusted to the results of the parameters color and COD. In the ozonation of the industrial affluent and color removal analysis, the highest kinetic constant (k₂) obtained was 0.0015 UPC^-1 min^-1 and the highest removal rate (r) was 392 UPC min^-1 between 60 and 120 minutes of treatment. In the effluent treatment, the highest k2was 0.0404 UPC^-1 min^-1 and the highest r was 5,834 min^-1 in the first 15 minutes of treatment. For COD the highest kinetic constant (k₂) in the ozonation of the industrial tributary was 0.0015 mgCOD^-1 min^-1 and the highest removal rate (r) was 19.2 min^-1 in the first hour of treatment. In the ozonation of the effluent the highest (k₂) was 0.0445 min^-1 with the highest r of 233.9 UPC min^-1. In general the removal velocity was always higher for true color than COD, with r = 1932.25 min^-1 and 177.43 min^-1 for effluent and effluent, respectively.

Keywords
color; COD; ozone; textile industry; kinetics of oxidation

Parâmetros	Afluente Bruto					Afluente Ozonizado
	N	X	DP	Máx	Mín	X	DP	Máx	Mín
T (^oC)	44	24	2	26	21	34	2	36	31
pH	44	8,8	0,3	9,1	8,4	8,8	0,3	9,0	8,3
Condutividade (μS cm^-1)	44	5,3	2,5	7,0	1,7	4,6	2,0	6,0	1,7
Turbidez (UNT)	44	124	96	216	20	75	22	87	41
E (%)	-	-	-	-	-	39	-	-	-
Cor Verdadeira (UPC)	84	1553	557	2320	990	220	61	260	130
E (%)	-	-	-	-	-	86	-	-	-
Alc. a Bicarbonato (mgCaCO₃ L^-1)	8	488	195	654	206	388	189	530	110
Ácidos Voláteis (mgHAc L^-1)	8	19	9	25	6	25	17	46	5
DQO bruta (mg L^-1)	24	350	213	597	92	191	98	270	48
E (%)	-		-	-	-	45	-	-	-
Sólidos Totais (mg L^-1)	8	3246	1155	4584	1824	3140	1038	4266	1790
E (%)	-	-	-	-	-	3,3	-	-	-
Sólidos Dissolvidos Totais (mg L^-1)	8	3156	1125	4432	1754	3063	1032	4180	1716
E (%)	-	-	-	-	-	2,9	-	-	-
SDT/ST	-	0,972	-	-	-	0,975	-	-	-
Sólidos Suspensos Totais (mg L^-1)	8	90	42	152	60	77	11	86	62
E (%)	-	-	-	-	-	14	-	-	-
SST/ST	-	0,027	-	-	-	0,024	-	-	-

Parâmetros	Efluente ETE					Efluente ETE Ozonizado
	N	X	DP	Máx	Mín	X	DP	Máx	Mín
T (^oC)	20	23	3	25	19	29	3	32	28
pH	20	8,2	0,2	8,3	8,0	8,8	0,2	9,0	8,6
Turbidez (UNT)	20	17	5	21	10	24	5	29	19
Condutividade (μS cm^-1)	20	2,8	1,1	4,3	3,8	3,4	1,0	4,3	3,2
Cor Verdadeira (UPC)	36	368	134	460	170	39	30	70	0
E (%)	-	-	-	-	-	90	-	-	-
Alc. a Bicarbonato (mgCaCO₃ L^-1)	8	377	83	428	253	292	152	414	98
Ácidos Voláteis (mgHAc L^-1)	8	12	10	24	1	10	8	21	2
DQO bruta (mg L^-1)	12	80	35	122	43	32	29	73	10
E (%)	-	-	-	-	-	60	-	-	-
Sólidos Totais (mg L^-1)	8	2068	290	2480	1844	2049	264	2410	1778
E (%)	-	-	-	-	-	0,91	-	-	-
Sólidos Dissolvidos (mg L^-1)	8	2033	283	2436	1828	2011	279	2376	1698
SDT/ST	-	0,983	-	-	-	0,981	-	-	-
E (%)	-	-	-	-	-	1,0	-	-	-
Sólidos Suspensos (mg L^-1)	8	35	14	46	16	38	30	80	10
SST/ST	-	0,016	-	-	-	0,018	-	-	-

Modelo Cinético de 1^a ordem - cor verdadeira
Afluente				Efluente
Perfil	k₁ (min^-1)	Equação	R²	Perfil	k₁ (min^-1)	Equação	R²
1	0,3464	$y = 0, 3464 x + 0, 3192$	0,9524	1	0,4182	$y = 0, 4182 x - 0, 8055$	0,8341
2	0,2669	$y = 0, 2669 x - 0.1504$	0,9183	2	1,4715	$y = 1, 4715 + 0, 3299$	0,8661
3	0,4993	$y = 0, 4993 x - 0.2042$	0,9457	3	3,5277	$y = 3, 5277 x + 0, 2112$	0,8868
3	0,4993	$y = 0, 4993 x - 0.2042$	0,9457	3	0,2148	$y = 0, 2148 + 1, 5233$	0,8615
4	0,4834	$y = 0, 4834 x + 0.3545$	0,8812	4	6,2758	$y = 6, 2758 + 0, 2693$	0,8029
4	0,4834	$y = 0, 4834 x + 0.3545$	0,8812	4	0,2930	$y = 0, 2930 x + 0, 7831$	0,8101
Modelo Cinético de 2^a ordem - cor verdadeira
Afluente				Efluente
Perfil	k₂ (min^-1)	Equação	R²	Perfil	k₂ (min^-1)	Equação	R²
1	0,0007	$y = 0, 0007 x + 2^{- 05}$	0,9822	1	0,0156	$y = 0, 0156 x - 0, 0045$	0,8616
2	0,0003	$y = 0, 0003 x - 0.0001$	0,9364	2	0,0208	$y = 0, 0208 x + 0, 0015$	0,9476
3	0,0009	$y = 0, 0009 x - 0.0003$	0,9796	3	0,0204	$y = 0, 0204 x + 0, 0004$	0,9556
3	0,0009	$y = 0, 0009 x - 0.0003$	0,9796	3	0,0028	$y = 0, 0028 + 0, 0079$	0,8756
4	0,0015	$y = 0, 0015 x + 0.0001$	0,9605	4	0,0404	$y = 0, 0404 x + 0, 0014$	0,8578
4	0,0015	$y = 0, 0015 x + 0.0001$	0,9605	4	0,0031	$y = 0, 0031 x + 0, 0107$	0,8846

Modelo Cinético de 1^a ordem - DQO
Afluente				Efluente
Perfil	k₁ (min^-1)	Equação	R²	Perfil	k₁ (min^-1)	Equação	R²
1	0,0855	$y = 0, 0855 x - 0, 0888$	0,9029	1	0,1940	$y = 0, 1940 x + 0, 0506$	0,8305
2	0,0650	$y = 0, 0650 x - 0, 0852$	0,8401	2	0,6972	$y = 0, 6972 x + 0, 0643$	0,9751
3	0,1522	$y = 0, 1522 x + 0, 0019$	0,8830	3	0,2564	$y = 0, 2564 x + 0, 0644$	0,8409
4	0,1957	$y = 0, 1957 x + 0, 1666$	0,8450	4	1,1069	$y = 1, 1069 x + 0, 155$	0,9444
Modelo Cinético de 2^a ordem - DQO
Afluente				Efluente
Perfil	k₂ (min^-1)	Equação	R²	Perfil	k₂ (min^-1)	Equação	R²
1	0,0003	$y = 0, 0003 x + 6^{- 05}$	0,9455	1	0,0055	$y = 0, 0055 x + 0.0014$	0,8446
2	0,0003	$y = 0, 0003 x - 0.0001$	0,9559	2	0,0247	$y = 0, 0247 x - 0.0004$	0,9991
3	0,0005	$y = 0, 0005 x + 0.0003$	0,9427	3	0,0028	$y = 0, 0028 + 0.0006$	0,8615
4	0,0015	$y = 0, 0015 x + 0.0004$	0,9749	4	0,0445	$y = 0, 0445 x - 0.0009$	0,9987

Afluente			Efluente
Perfil	Tempo (min)	r (UPC.min^-1)	Perfil	Tempo (min)	r (UPC min^-1)
1	15 a 30	124	1	60 a 120	306
2	60 a 120	9,72	2	0 a 15	102
3	60 a 120	392	3	0 a 15	1487
4	30 a 45	184	4	0 a 15	5834

Afluente			Efluente
Perfil	Tempo (min)	r (mgDQO^-1.min^-1)	Perfil	Tempo (min)	r (mgDQO^-1.min^-1)
1	240 a 300	0,82	1	0 a 60	0,85
2	240 a 300	0,20	2	0 a 60	32,45
3	0 a 60	19,20	3	0 a 60	5,42
4	0 a 60	2,87	4	0 a 60	233,90

Laboratório de Hidrogênio, Coppe - Universidade Federal do Rio de Janeiro, em cooperação com a Associação Brasileira do Hidrogênio, ABH2 Av. Moniz Aragão, 207, 21941-594, Rio de Janeiro, RJ, Brasil, Tel: +55 (21) 3938-8791 - Rio de Janeiro - RJ - Brazil
E-mail: revmateria@gmail.com

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[1] e-mail: jlbtrevizani@gmail.com, kaquerne@utfpr.edu.br, fhpassig@utfpr.edu.br, gilsonschiavon@utfpr.edu.br,iza.consalter@hotmail.com, flaviav@utfpr.edu.br