Boric acid as eleclectrolyte in coffee pulping wastewater treatment
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Characterization of Wastewater from Coffee Processing Industry:
Preparation of washed coffee requires pulping; washing equipment’s and adequate quantities of clean water. The approximate water requirement for the production of one tonne of clean coffee is 85,085 L for Arabica and 93,000 L for Robusta while using conventional pulper and washer.
Although the levels of contamination of wastewater vary from region to region according to quantity of water and type of technology used in the process, in general coffee effluents are acidic- low pH (Refer Table 1.0) containing high concentration of suspended and dissolved organic solids (refer Table) and less dissolved oxygen.
The pollution load measured in terms of BOD ranges from 8500-10,260 mg L_1. Coffee factory wastewaters contain high concentration of organics such as sugars, peptides phenols and pectines. Nutrient concentrations in pulpery wastewater have low values of Nitrogen Phosphorus and Sulphur (Refer Table 1.0).
The biodegradability of this water can be measured as a function of COD constituted by BOD oscillating between 33 and 83%. Table 1.0 shows various Physicochemical parameters present in wastewater and their values along with tolerance limits prescribed by the Central Pollution Control Board, New Delhi.
Preparation of washed coffee requires pulping; washing equipment’s and adequate quantities of clean water. The approximate water requirement for the production of one tonne of clean coffee is 85,085 L for Arabica and 93,000 L for Robusta while using conventional pulper and washer.
Although the levels of contamination of wastewater vary from region to region according to quantity of water and type of technology used in the process, in general coffee effluents are acidic- low pH (Refer Table 1.0) containing high concentration of suspended and dissolved organic solids (refer Table) and less dissolved oxygen.
The pollution load measured in terms of BOD ranges from 8500-10,260 mg L_1. Coffee factory wastewaters contain high concentration of organics such as sugars, peptides phenols and pectines. Nutrient concentrations in pulpery wastewater have low values of Nitrogen Phosphorus and Sulphur (Refer Table 1.0).
The biodegradability of this water can be measured as a function of COD constituted by BOD oscillating between 33 and 83%. Table 1.0 shows various Physicochemical parameters present in wastewater and their values along with tolerance limits prescribed by the Central Pollution Control Board, New Delhi.
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