Improved Design Of Wood&Cotton Pulp&Paper Wastewater Treatment

China pulp and paper industry scale degree on the low side, high consumption of resources, is of high water consumption, high pollution industry," pulp and paper industrial water pollutant discharge standard "(GB3544-2008), is commonly used to level two process, difficult to achieve discharge standards, especially for water shortage region, pulp and papermaking enterprise to achieve fresh water, waste emissions, emissions of pollutants " three add", improving the pulp and paper industry effluent quality become the industry production and development problem.WeiFang Henglian Pulp&Papermaking Co.,Ltd sewage treatment station of the existing sewage treatment process using the BIOLAK technology, existing water quality fluctuation, easy blockage, entanglement suspension aeration sludge bulking sludge instability problems of water in159mg/L-488mg/L, CODcr, often appearing more than the design water quality CODcr<300mg/L phenomenon.The enterprise exceed the standard for water quality status and water standards problems, decide on the existing sewage treatment system design was improved, the effluent CODCr<90mg/L.In this paper, aiming at the existing problems of BIOLAK technology system, after the program analysis and comparison, select " hydrolytic acidification and oxidation ditch+mimic enzyme catalysis polymerization depth processing " process combined with design, design parameters and construction and selection of equipment parameters, design of the power supply, automation and other auxiliary engineering. The technology has been in a number of pulp and paper enterprise applications, the effluent quality has safeguard, the removal rate of pollutants is high, not only has the advantages of simple operation, strong flexibility, relatively low operating costs.Through to the Weifang Heng joint pulp and paper company of pulping and papermaking wastewater actual operating results show that, COD, BOD. SS, chroma removal rate is achieved respectively95%,97.5%,97%,94%or more, all the " pulp and paper industrial water pollutant discharge standard "(GB3544-2008), for wastewater reuse to lay a foundation.The process is suitable for pulping and papermaking wastewater treatment and deep treatment two, has obvious promotion effect. To this end, the technology has been in the pulp and paper enterprises in the application.