Experimental study of treatment of kitchen waste water using rice husk ash

Abstract

Kitchen wastewater is nutrient and carbon-rich, and if properly collected and treated, it may provide new water, fertilizer, and energy. The important contaminants in domestic wastewater from the kitchen include organic load from food processing, utensil cleaning in the kitchen, soap, and detergents, these are oil and grease, proteins, carbohydrates, and other dissolved and suspended substances. These particles can also be removed effectively and the treated water used for agriculture or gardening. Kitchen wastewater treatment involves determination of Biochemical Oxygen Demand(BOD), Chemical Oxygen demand(COD),Total suspended solid(TSS). Numerous techniques are employed globally to handle kitchen waste. The removal of various pollutants from wastewater and wastewaters is now being explored using rice husk, a material that is both ubiquitous and relatively inexpensive. The present work deals with the practicability of applying continuous process for removal of BOD, COD, and TSS, using Rice husk ash as adsorbent. In present study continuous process is adopted to check the viability of rice husk as adsorbent. The effects of operating parameters on BOD, COD, TSS removal were studied. From the experiment the optimum conditions were determined as 15 cm depth of Rice husk ash(RHA) layer and 60 min detention time. At the optimum conditions, removal efficiencies for Chemical Oxygen Demand (94%), Biochemical Oxygen Demand(90%), Total Suspended Solids(91%) were observed. It is observed that Rice Husk(RH) can be used as effective adsorbent for treatment of kitchen wastewater.