XVIII
Contents
21 Greywater Recycling: Field Experience
w. Neubrand, J. Heiser, A. Schindler, M. Treberspurg,
W. Hofbauer and H. Czaya.. .... .... ........ ....... ........... .... ..... ....... ....... 359
1 Introduction... ... .... ....... ........ ........ ........ .... .... .... ...... ..... ........... ....... ... 360
2 Domestic Water Consumption, Wastewater Characteristics
and Treatment Systems.. .... ... ........ .......... ... .... .......... ...... ... ......... ..... 361
3 Requirements for On-Site Greywater Recycling ............................ 362
4 Treatment Processes ........................................................................ 362
4.1 Nanofiltration.......................................................................... 363
4.2 UV Disinfection and Chlorination................ .......................... 363
5 Greywater Recycling - Process Scheme......................................... 363
6 Field Installations in Austria ........................................................... 365
6.1 Key Data of Water and Thermal Recycling System...... .... ..... 365
6.2 Greywater and Recycled Water Quality .................................. 365
6.3 Nanofiltration.......................................................................... 367
6.4 Economic Aspects................................................................... 368
7 Conclusions.... ............ ..... ......... ... ......... ..... ...... ..... ... ....... ....... ..... ..... 368
References........................................................................................... 369
22 Chemical Pretreatment of Sewage - A Cost-Benefit
Method for Upgrading of Existing and Constructing New
Wastewater Treatment Plants
I. Licsko, Z. Me/icz, and A. Szabo............................................. 371
1 Introduction ..................................................................................... 371
2 Treated Sewage Reuse in Hungary ................................................. 373
3 Background ..................................................................................... 374
4 Materials and Methods .................................................................... 376
5 Results ............................................................................................. 377
5.1 Nl Wastewater Treatment Plant... ......................................... 377
5.2 Bl Wastewater Treatment Plant... ......................................... 381
6 Discussion ....................................................................................... 385
7 Conclusions ..................................................................................... 387
References.............................................................. ............................. 387
23 Biological Nitrogen Removal Using Immobilized Bacteria
Y. Argaman, V. Libman, and G. Papkov................................... 391
1 Introduction ..................................................................................... 392
2 Applicability of the Proposed Process for Wastewater
Recycling Projects .......................................................................... 393
2.1 Process development background .......................................... 393
2.2 Conventional Wastewater Treatment Systems Including
Nitrogen RemovaL ............................................................... 393
2.3 Alternative Biological Nitrogen Removal Processes ............. 395
Contents
21 Greywater Recycling: Field Experience
w. Neubrand, J. Heiser, A. Schindler, M. Treberspurg,
W. Hofbauer and H. Czaya.. .... .... ........ ....... ........... .... ..... ....... ....... 359
1 Introduction... ... .... ....... ........ ........ ........ .... .... .... ...... ..... ........... ....... ... 360
2 Domestic Water Consumption, Wastewater Characteristics
and Treatment Systems.. .... ... ........ .......... ... .... .......... ...... ... ......... ..... 361
3 Requirements for On-Site Greywater Recycling ............................ 362
4 Treatment Processes ........................................................................ 362
4.1 Nanofiltration.......................................................................... 363
4.2 UV Disinfection and Chlorination................ .......................... 363
5 Greywater Recycling - Process Scheme......................................... 363
6 Field Installations in Austria ........................................................... 365
6.1 Key Data of Water and Thermal Recycling System...... .... ..... 365
6.2 Greywater and Recycled Water Quality .................................. 365
6.3 Nanofiltration.......................................................................... 367
6.4 Economic Aspects................................................................... 368
7 Conclusions.... ............ ..... ......... ... ......... ..... ...... ..... ... ....... ....... ..... ..... 368
References........................................................................................... 369
22 Chemical Pretreatment of Sewage - A Cost-Benefit
Method for Upgrading of Existing and Constructing New
Wastewater Treatment Plants
I. Licsko, Z. Me/icz, and A. Szabo............................................. 371
1 Introduction ..................................................................................... 371
2 Treated Sewage Reuse in Hungary ................................................. 373
3 Background ..................................................................................... 374
4 Materials and Methods .................................................................... 376
5 Results ............................................................................................. 377
5.1 Nl Wastewater Treatment Plant... ......................................... 377
5.2 Bl Wastewater Treatment Plant... ......................................... 381
6 Discussion ....................................................................................... 385
7 Conclusions ..................................................................................... 387
References.............................................................. ............................. 387
23 Biological Nitrogen Removal Using Immobilized Bacteria
Y. Argaman, V. Libman, and G. Papkov................................... 391
1 Introduction ..................................................................................... 392
2 Applicability of the Proposed Process for Wastewater
Recycling Projects .......................................................................... 393
2.1 Process development background .......................................... 393
2.2 Conventional Wastewater Treatment Systems Including
Nitrogen RemovaL ............................................................... 393
2.3 Alternative Biological Nitrogen Removal Processes ............. 395