Agricultural Waste

Agricultural production leaves considerable amounts of agricultural waste. Some of it is recycled into the agricultural production as fertilizer, while large amounts remain unused – and in many instances pose a disposal problem. Uncontrolled burning in the fields is not only a hazardous disposal solution - it is also wasting useful energy. With efficient collection systems, waste from agricultural production can be utilised as fuel for power and heat production.
In some agricultural industries large amounts of biomass waste is already concentrated and readily available for utilisation. The palm oil industry, for instance, produces significant amounts of empty fruit bunches that can be incinerated. Liquid wastes may also be methanized and can secure a basis for own power and process heat production while delivering excess power to the grid. In the sugar industry, significant amounts of bagasse – the waste after extraction of sugar – is an equally excellent fuel. Rice production may also be industrialised to such an extent that rice husks are available in amounts sufficient for incineration in a boiler, thereby securing a basis for power and heat production.
In the forest industry, large concentrations of biomass waste can be utilised for power and heat production, e.g. at sawmills. The forest industry also supplies raw material for briquettes production, where sawdust, charcoal dust, degradable waste paper and dust from agricultural production may constitute a final utilisation of waste materials from agriculture related production. The following sectors of agricultural waste utilisation are presented in this section: 

  • Waste in Forest Industry 
  • Waste in Other Agricultural Industries 
  • Waste in Palm Oil Industries 
  • Waste in Rice Industry 
  • Waste in Sugar Industry
Case:
35 MW Bagasse Based Cogeneration Project by Mumias Sugar Company Limited (MSCL)

(UNFCCC project ref. no. 1404)

Mumias Sugar is the leading sugar manufacturer in Kenya. It sells sugar through appointed distributors nationwide. The company has diversifed into power production. The technology to be employed for the Mumias Cogeneration Project will be based on the conventional steam power cycle involving direct combustion of biomass (bagasse) in a boiler to raise steam, which is then expanded through a condensing extraction turbine to generate electricity. Some of the steam generated will be used in the sugar plant processes and equipment.

Project investment: USD 20 million

Project CO2 reduction over a crediting period of 10 years: 1,295,914 tCO2e

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