Author/Authors :
taouraout, a. university ibntofail of kenitra - faculty of sciences - laboratory of agrophysiology, biotechnology, environment and qualities, Kenitra, Morocco , taouraout, a. moulay ismail university - faculty of science - laboratory of natural resources management and development team, health and environment, Meknes, Morocco , chahlaoui, a. moulay ismail university - faculty of science - laboratory of natural resources management and development team, health and environment, Meknes, Morocco , belghyti, d. university ibntofail of kenitra - faculty of sciences - laboratory of agrophysiology, biotechnology, environment and qualities, Kenitra, Morocco , taha, i. moulay ismail university - faculty of science - laboratory of natural resources management and development team, health and environment, Meknes, Morocco , ouarrak, k. moulay ismail university - faculty of science - laboratory of natural resources management and development team, health and environment, Meknes, Morocco , sammoudi, r. moulay ismail university - faculty of science - laboratory of natural resources management and development team, health and environment, Meknes, Morocco
Abstract :
The objective of the present study was to investigate an environmental and economically sustainable technic to treat domestic wastewater in rural areas of Morocco. To do this , a pilot-scale treatment system, horizontal multi-soil-layering (H-MSL) measuring 0,5 m × 0,3 m × 0,55 m (L ×W× H), was designed, constructed and operated to treat domestic wastewater, using natural substrate. A feeding tank (100L) was used to store prescreened wastewater from the inlet of the household wastewater using submersible pump. Three hydraulic loading rates (HLRs) were tested: 0.25, 0.35 and 0.50 m/day. This pilot-scale treatment was exposed to the environmental conditions and it does not include any pretreatment. Several water quality parameters including BOD5, COD, TSS, NH4 +, NO3 - and PO4^ 3- were monitored. The ANOVA test showed a significant difference between the means of these parameters at (p 0.05) for the influent and the effluent, except ammonium. Moreover, it showed a difference between the values of organic mattersat0.25m/d and 0.5m/d. However, it did not show any significant differences between each type of nutrients for all HLRs tested. The main treatment performance results showed the following average removal rates: BOD5 (66±13 %), COD (68±12 %) and TSS (75±14%), NH4 +(29.2±14.1%) and PO4^ 3- (45.2±27.3%). The quality of the treated wastewaters was under to Moroccan Reject Limit Value (RLV).
Keywords :
Domestic wastewater , Treatment , Performance of VFCW , Hydraulic loading rates , Rural areas of Morocco
