Calculations
SALUTAR anaerobic filter
Input data
Type of contributor
Number of contributors
Temperature
Output data
Contribution of sewage
Hydraulic detention time
Filter bed volume
Description
Given the number and type of contributors and the temperature of the effluent to be treated, calculates the volume of the filtering medium.
Table 1 - Daily contribution of waste and organic load by type of building and occupants
| Building | Unit | Sewage contribution L/d | Organic load contribution L/d /d |
|---|---|---|---|
| Permanent occupants | |||
| Residence | |||
| High standard | Person | 160 | 50 |
| Average standard | Person | 130 | 45 |
| Low standard | Person | 100 | 40 |
| Hotel (except laundry and kitchen) | Person | 100 | 30 |
| Temporary accommodation | Person | 80 | 30 |
| Temporary occupants | |||
| Factory in general | Person | 70 | 25 |
| Office | Person | 50 | 25 |
| Public or commercial building | Person | 50 | 25 |
| Schools (day schools) and long-term places | Person | 50 | 20 |
| Bars | Person | 6 | 6 |
| Restaurants and similar | Person | 25 | 25 |
| Cinemas, theaters and short-stay places | Person | 2 | 1 |
| Public restrooms | Sanitary basin | 480 | 120 |
Table 2 - Sewage hydraulic detention time (t), by flow range and sewage temperature (in days)
| Flow (L/day) | Average temperature of the coldest month | ||
|---|---|---|---|
| Below 15°C | Between 15°C and 25°C | Greater than 25°C | |
| Up to 1,500 1.17 | 1 | 0.92 | |
| From 1,501 to 3,000 | 1.08 | 0.92 | 0.83 |
| From 3,001 to 4,500 | 1 | 0.83 | 0.75 |
| From 4,501 to 6,000 | 0.92 | 0.75 | 0.67 |
| From 6,001 to 7,500 | 0.83 | 0.67 | 0.58 |
| From 7,501 to 9,000 | 0.75 | 0.58 | 0.5 |
| Above 9,000 | 0.75 | 0.5 | 0.5 |
Talk to an engineer
Get in touch with Salutar:
Site: https://www.salutar.eco.br/
Phone: +55 (93) 99161-7554
E-mail: contato@salutar.eco.br
References
- ABNT. NBR 13969 Tanques sépticos - Unidades de tratamento complementar e disposição final dos efluentes líquidos - Projeto, construção e operação - Rio de Janeiro, ABNT, SET 1997