BOOK REVIEWS
321
valuable addition to any biochemist's bookshelf. Regrettably, its price of £49.00 reflects its specialised content and presumably t...
valuable addition to any biochemist's bookshelf. Regrettably, its price of £49.00 reflects its specialised content and presumably the limited sales expected. It will be in high demand by a limited number of biochemists. It is destined to become a much borrowed book. A. G. STEVENS
Food Industry Wastes: Disposal and Recovery. Edited by A. Herzka and R. G. Booth: Applied Science Publishers Ltd., London. 1981. viii + 246 pp. Price: £20.00. This book consists of seventeen papers presented at a symposium organised by the Association of Consulting Scientists held in Norwich, Great Britain in November, 1980. The authors, whose expertise is drawn from across the water and waste treatment field--Water Authorities, consultancy services, equipment manufacturers and industrial concerns with disposal problems--give a most interesting and valuable insight into a number of important areas. The opening papers are concerned with legislation in the water treatment field. Various EEC directives concerned with water quality and pollution control and the implications for industry of the trend towards tightening legislative control on water discharge to the environment are discussed. Trade effluent charging systems and methods for reducing charges on discharges to sewers are outlined and the economics of aerobic versus anaerobic effluent treatment are examined. Papers on the increasing presence of micro-pollutants (xenobiotics) and their identification, in a particular catchment area and on the discharge of an odorous chemical from a sewage works seem a little out of place in a symposium concerned ~ith the disposal of food industry wastes but, nevertheless, this topic is of importance to food processors using such surface waters for their raw water supply. Two papers concerned with the development of anerobic digestion systems for treating food wastes will be of particular interest to many; a paper on an anerobic system for a wheat starch effluent stream should be 'required reading' for all who profess an interest in waste treatment. Other papers examining waste disposal in specific areas of p r o c e s s i n g ~ a i r y , malting, brewing and distilling, meat and animal products etc.--make interesting reading and one, focused specifically on the problem of aqueous wastes which contain significant quantities of fatty material, is very useful. The remaining contributions include recovery and utilisation of materials from food waste streams, concluding with an account of developments in screening, an important, but somewhat neglected, area. All in all, this is a very readable collection of papers containing much of use to those interested in waste treatment. J. R. BUTTERS