Improvement of coagulation-flocculation process using anionic polyacrylamide as coagulant aid

被引：167

作者：

Aguilar, MI ^{[1
]}

Sáez, J ^{[1
]}

Lloréns, M ^{[1
]}

Soler, A ^{[1
]}

Ortuño, JF ^{[1
]}

Meseguer, V ^{[1
]}

Fuentes, A ^{[1
]}

机构：

[1] Dept Chem Engn, Murcia 30071, Spain

来源：

CHEMOSPHERE | 2005年 / 58卷 / 01期

关键词：

coagulation; flocculation; slaughterhouse wastewater; anionic polyacrylamide; settling time;

D O I：

10.1016/j.chemosphere.2004.09.008

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A physicochemical treatment (coagulation-flocculation) was applied to a slaughterhouse wastewater, using anionic polyacrylamide as coagulant aid to improve the settling velocity of the floes formed with the coagulants used: ferric sulphate, aluminium sulphate and polyaluminium chloride. The optimum speed and stirring time for the flocculation stage were ascertained along with the optimum pH and coagulant and coagulant aid doses. The speed and coagulation time were initially set according to recommendations in the literature concerning the treatment of this type of water. Chemical oxygen demand (COD), biochemical oxygen demand at 5 days (BOD5) and total suspended solids (TSS) were recorded at the beginning and end of each experiment in order to monitor the process. Once the optimal conditions had been established, several parameters were measured in order to assess the coagulation-flocculation process: particle number and size, sludge volume, nutrients (ammonia nitrogen, total Kjeldahl nitrogen, albuminoid nitrogen, orthophosphate, total phosphorus) and the residual concentration of iron and aluminium in clarified water. Anionic polyacrylamide, when added with ferric sulphate or polyaluminium chloride led to a significant increase in the settling speed. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：47 / 56

页数：10

共 36 条

[1] Relationship between raw water TOC and the optimum coagulant dose (iron III chloride) [J].

Aguiar, A ;

Lefebvre, E ;

Rahni, M ;

Legube, B .

ENVIRONMENTAL TECHNOLOGY, 1996, 17 (04) :381-389

[2]

Aguilar MI, 1998, AN QUIM-INT, V94, P231

[3]

[Anonymous], 1995, Standard methods for examination of water and waste water, V19th

[4]

BAZER-BACHI A, 1990, Revue des Sciences de l'Eau, V3, P377

[5]

BELTRAN VM, 1980, ING QUIM, V6, P41

[6]

Boller M, 1997, WATER SCI TECHNOL, V36, P239, DOI 10.2166/wst.1997.0129

[7] The use of soluble organic polymers in waste treatment [J].

Bolto, BA ;

Dixon, DR ;

Gray, SR ;

Chee, H ;

Harbour, PJ ;

Ngoc, L ;

Ware, AJ .

WATER SCIENCE AND TECHNOLOGY, 1996, 34 (09) :117-124

[8] SOLUBLE POLYMERS IN WATER-PURIFICATION [J].

BOLTO, BA .

PROGRESS IN POLYMER SCIENCE, 1995, 20 (06) :987-1041

[9]

*BORM, 1986, B OF REG MURC, V154

[10]

*BORM, 1999, B OF REG MURC, V135

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