The demand for water is high in the food industry, particularly during the processing of animal product origin. A more sustainable approach to the use of the water resource is needed to reduce its waste. A systematic literature review was carried out from publications identified according to relevance and timeliness. The aim was to find alternative food processing production methods that considered both recycling and reuse of water in different slaughtering of animals such as cattle, swine, poultry, goat, sheep and fish. Articles which addressed cleaner production methods were selected because of special relevance in water resource management, Poultry processing was considered a special case regarding the recycling and reuse of water. That was due to the volume of water used as well as the level of likely contamination it might pose if reused. Wastewater can be largely reduced by adopting changes in practices, such as plant layout; materials used; drainage systems using dedicated separation of effluents and shaded area at reception with ventilation and sprinkles.

Currently, the unchecked increase in human population results in increased demand for agricultural lands. Growing two or more crops simultaneously is one of the mechanisms to reduce this problem. A field experiment was conducted in northwestern Ethiopia during 2017 and 2018 cropping seasons. Two legume crops [haricot bean (Phaseolus vulgaris) and lupine (Lupinus angustifolius)] were intercropped with finger millet (Eleusine coracana) using two intercrop planting methods (row and mixture) and three finger millet-legume planting ratios (100.0%:75.0%, 100.0%:50.0% and 100.0%:25.0% of the respective recommended seed rate of sole crops). Two sole crop finger millets (planted in rows and broadcast) and two sole legume crops (haricot bean and lupine) were included as checks. The experiment comprised a randomized complete block design with three replications. Results indicated intercropped finger millet and total land output yield from finger millet-haricot bean row intercropping at a 100:50 planting ratio and sole finger millet planted in a row improved better yield stability. Finger millet-haricot bean row intercropping at a 100:50 planting ratio also resulted in higher grain yields of the component crops, area time equivalent ratio (1.34), relative production (38.1%) and economic (314.0%) efficiencies with a relatively lower component crop competitive ratio. Thus, this cropping system offered increased productivity and economic return and is a viable option for increasing household food security.